Manual Control Unit SLVA 4Kplus Installation Directions

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FACTORY AUTOMATION

MANUAL
SLVA-4Kplus
CONTROL UNIT

Part No. 109008
2012-03
Date of issue

With regard to the supply of products, the current issue of the following document is applicable: The General
Terms of Delivery for Products and Services of the Electrical Industry,
published by the Central Association of the "Elektrotechnik und Elektroindustrie (ZVEI) e.V."
including the supplementary clause: "Erweiterter Eigentumsvorbehalt".

SLVA-4Kplus Control unit

Table of contents
1

Intended use ............................................................................................ 6

Product description ................................................................................ 7

2.1
2.2
2.3
2.4
2.5
2.5.1
2.5.2
2.5.3
2.5.4
2.6
2.6.1
2.6.2
2.6.3
2.7

Product features ....................................................................................................... 7
Components of the light barrier safety system .......................................................... 7
Connections on the SLVA-4Kplus ............................................................................. 9
Fuses ...................................................................................................................... 10
Operating modes .................................................................................................... 10
Setting the operating mode ..................................................................................... 10
Start-up/restart interlock .......................................................................................... 11
Relay monitor .......................................................................................................... 11
Emergency-Stop ..................................................................................................... 12
Indicator lights ......................................................................................................... 13
Internal control unit indicator lights .......................................................................... 13
External indicator lights ........................................................................................... 13
Light barrier and light grid indicators ....................................................................... 14
Test ......................................................................................................................... 14

Arrangement and combination of light barriers and light grids ....... 15

Installation/removal of the control unit ............................................... 19

Installation ............................................................................................. 19

Commissioning ...................................................................................... 22

Technical data ....................................................................................... 24

Date of issue

12.3.12

Part No. 109008

5.1
5.2
5.3
5.4
5.5
5.5.1
5.5.2
5.5.3
5.5.4
6.1
6.2
6.3
6.4
6.5
6.6
6.7
7.1
7.2
7.3
7.4

SLA light barriers and SLP light grids ...................................................................... 19
Emergency-Stop circuit ........................................................................................... 19
Indicator lights ......................................................................................................... 19
Safety outputs ......................................................................................................... 20
User check lists ....................................................................................................... 20
Before installation ................................................................................................... 20
After installation ...................................................................................................... 21
Commissioning ....................................................................................................... 21
Periodic check ........................................................................................................ 21
Adjustment .............................................................................................................. 22
Checking the detection capability ........................................................................... 22
Checking the start-up/restart interlock and start-up enable ..................................... 22
Checking the test input ........................................................................................... 22
Checking the relay monitor ..................................................................................... 22
Checking the static Emergency-Stop ...................................................................... 23
Checking the pulsed Emergency-Stop .................................................................... 23
General specifications ............................................................................................ 24
Electrical data ......................................................................................................... 24
Other data ............................................................................................................... 25
Dimensions ............................................................................................................. 26

SLVA-4Kplus Control unit

7.5

Curves and diagrams ...............................................................................................26

Periodic checks ..................................................................................... 27

Fault elimination .................................................................................... 27

Circuit examples .................................................................................... 29

Ordering information ............................................................................. 32

Guarantee conditions ............................................................................ 33

Glossary ................................................................................................. 33

14.1
14.2

Standards ............................................................................................... 34

Construction and equipping of protective equipment ...............................................34
Use and installation of protective equipment ...........................................................34

Introduction!

These operating instructions provide information on the intended use of the product and
are intended to prevent the occurrence of dangerous situations. They must be read and
applied by all persons involved in the application, installation, operation, servicing, repair
and inspection of the product. This product can only fulfil the purpose for which it is intended if it is installed, operated, serviced, repaired and inspected in accordance with the information provided by Pepperl+Fuchs.
The guarantee provided by Pepperl+Fuchs for this product is rendered null and void if the
product is not installed, operated, serviced, repaired and inspected in accordance with
the information provided by Pepperl+Fuchs.
Before the selection and use of the product, an evaluation must be undertaken to determine that it is suitable for the envisaged application. Pepperl+Fuchs has no control over
the selection and use of the product. Our liability is therefore restricted to the intrinsic quality of the product.
The product must be regularly inspected and serviced by specialist personnel. The results
of such inspections and servicing operations are to be recorded. Only original Pepperl+Fuchs parts are to be used when effecting repairs.

This equipment contains assemblies that are electrostatically sensitive. Opening of the
equipment for the purpose of servicing and repair work must be undertaken by specialist
personnel. Electrostatic discharges due to unprotected contact with the assemblies must

12.3.12

The statements above do not replace the clauses relating to guarantees and liability in the
Pepperl+Fuchs general terms and conditions of sale and supply.

Date of issue

Repair work on the product, which has not been carried out by Pepperl+Fuchs, is outside
the control of Pepperl+Fuchs. Our liability is therefore restricted to those repairs that have
been carried out by Pepperl+Fuchs.

Part No. 109008

Modifications to the equipment or components and the use of defective or incomplete
equipment or components are not permitted. Repair work on equipment or components
carried out other than by Pepperl+Fuchs must only be undertaken in proper workshop facilities. Such workshop facilities are responsible for acquiring the latest technical information on the equipment and components from Pepperl+Fuchs.

SLVA-4Kplus Control unit

be avoided. The destruction of components caused by an electrostatic discharge will
render the guarantee null and void!
The right is reserved to make technical changes.

Symbols

In this manual important notes for operation and safety when using the control unit SLVA4Kplus are distinguished by symbols. The meaning of the symbols are:
Recommendation for the user
Attending these notes the insallation procedure and the use of the control unit SLVA-4Kplus will be lightened.
Indication of dangerous circumstances or a direct danger. Non observance may lead to damage to property, or to severe or fatal injury.

Date of issue

12.3.12

Part No. 109008

We reserve the right to alter specifications at any time and without notice.

SLVA-4Kplus Control unit
Intended use

Intended use
The SLVA-4K system, comprising the SLA light barriers or the SLP light grids and the control unit SLVA-4Kplus, must only be used for the intended purpose, i.e., as a non-contact
electro-sensitive protection device (ESPD) for the prevention of access to danger points
and areas.
If the system is used for a purpose other than that intended, its function
may not be guaranteed.

When operating the equipment the relevant safety regulations, standards and specifications are to be observed and the specific requirements of the specific application must be
considered.
The SLVA-4Kplus is a control unit for a safety light barrier system with 1 to 4 single-pass
light barriers of type BWS (Non-contact electro-sensitive protection device) category 4
(ISO 13849-1) and type 4 (EN 61496-1), which can be used for the prevention of access
to danger points and areas. A complete light barrier safety system consists of:
• 1-4 single-pass light barriers (transmitters and receivers),
• the SLVA-4Kplus control unit and optionally
• a 2-channel monitoring system (for example for Emergency-Stop switches)
Each transmitter generates a light beam, which is detected by an associated receiver. Any
interruption of the light beam is detected by the control unit, which opens the contacts of
the output relay, thus in turn enabling secondary switching devices to initiate methods of
preventing the danger of movement into the protected area.

Date of issue

12.3.12

Part No. 109008

In constructing a BWS of type 4, only the permitted light barriers of type SLA and light grids
of type SLP may be connected to SLVA-4Kplus control unit. The light barriers and light
grids cannot be operated without the control unit.

SLVA-4Kplus Control unit
Product description

2
2.1

Product description
Product features
• Self-monitoring
• Modular construction
• Monitored relay outputs (EDM, external device monitor)
• Can be operated with and without start-up/restart interlock
• Selectable relay monitor
• Diagnostic indication for ease of fault location
• Control unit to protection class IP20/NEMA 1 for installation in a control cabinet or in a
housing with a protection class of at least IP54/NEMA 3
• Up to four protective beams
• Red transmitted light for simple alignment
• Stability control indication on the light barrier receivers and on the control unit
• Monitored connection of 2-channel safety circuit (EMERGENCY-STOP circuit)

2.2

Components of the light barrier safety system
The system is represented schematically in figure 2.1 and figure 2.2. The control unit generates the required supply voltages for the light barriers. The control electronics drives the
light barrier transmitters and evaluates the signals coming from the receivers. A safetyaligned microprocessor control permanently monitors the light barrier functions. Two positive-action relays provide the switch-off signal when a light beam is broken. The switching
time of the relays is monitored to ensure that the maximum switching time is not exceeded.
The SLVA-4Kplus can be used in various operating modes, i.e. the functions:
• Start-up/Restart interlock
• Relay monitor
• Monitoring of 2-channel safety circuits.
These can also be activated by the user, either singly, or in combination.
Signal outputs for the conditions:
• Ready for start/fault condition
• Safety outputs switched-off
enable a system message to be provided to a location appropriate to the respective safety
device.

Date of issue

12.3.12

Part No. 109008

• Safety outputs switched-on

SLVA-4Kplus Control unit
Product description

Voltage supply

OSSD-outputs

Status signals
Test input

Transmitter 1

Receiver 1

Transmitter 2

Receiver 2

Channel 3

Transmitter 3

Receiver 3

Channel 4

Transmitter 4

Receiver 4

Channel 1
SLVA-4Kplus
Channel 2

Restart input

Fig. 2.1:

Light barrier safety system with SLVA-4Kplus

Voltage supply

OSSD-outputs

Status signals
Test input

Channel 1
SLVA-4Kplus
Channel 2

Transmitter 1

Receiver 1

Transmitter 2

Receiver 2

Channel 3
Channel 4

Restart input

Light barrier safety system with EMERGENCY-STOP switch

Date of issue

12.3.12

Part No. 109008

Fig. 2.2:

SLVA-4Kplus Control unit
Product description

2.3

Connections on the SLVA-4Kplus
The connection of the light barriers and light grids to the control unit is by means of terminals. The control unit connections are shown in figure 2.3.
+

red

green
1

2
TEST

RESTART

8
24V

9
R1

24V

OSSDs
ON
OFF

12345678

OSSD1

OSSD2
RELAY MONITOR

POWER

24 V AC/DC Version -2528
24 V AC
115 V AC
230 V AC

Date of issue

12.3.12

Part No. 109008

Fig. 2.3:

N.C. contact
ext. relay

Control unit connections

Terminal Function
1-2
Normally-open contact for test and fault elimination; has to be closed,
unless the test or fault elimination is started by switching the power supply
off and then on again - see section 9.
3-4
Normally-open contact for start-up/restart enable; has to be closed. The
contact remains open when the control unit is operating in the mode without
a start-up/restart inhibit.
5-6
Direct connection of LED for indication of output relay status (Optionally
available with relay contacts) - see section 2.6.2.
7-14 Connections for light barrier receiver, or the Emergency-Stop circuits - see
section 5.
15-16 Connection for start-up readiness/fault status indicator light - see section
2.6.2.
17-18 Power supply connection: Arbitrary polarity for direct voltage supply.
19-22 Safety relay switch outputs (OSSD), zero potential contacts for machine
control.
23-24 Relay monitor: Only connected when the function relay monitor is used see section 2.5.3.
25-32 Connections for light barrier transmitter - see section 5.
Table 2.1: Terminal assignment

SLVA-4Kplus Control unit
Product description

2.4

Fuses
The OSSD control unit outputs are fused.
Before replacing a fuse, the control unit must be isolated from the power
supply.

All fuses are located inside the control unit and are not accessible from outside. In order
to replace a fuse, the lower terminal strip must be removed.
Output
Switch output, N.O. 1 (19-20)
Switch output, N.O. 2 (21-22)

Value
T 2,0 A
T 2,0 A

Plan view
Left
Right, adjacent

Table 2.2: Fuse assignment and values.
2.5

Operating modes

2.5.1 Setting the operating mode
The operating mode is factory-set to match the order code. However, the user can change
the operating mode. Following a change in the operating mode, the selected setting must
always be checked for correct operation before the system is enabled.
On the SLVA-4Kplus the operating mode is set by means of DIP
switches. The DIP switches are accessed by removing the transparent
cover from the top of the control unit. For each setting, two DIP switches
are set at the stated positions.

2+6
3+7
4+8

Operating mode
without start-up/restart interlock
with start-up/restart interlock
without relay monitor (EDM)
with relay monitor (EDM)
Light barriers on channels 3 and 4
Emergency-Stop on channels 3 and 4
Emergency-Stop static
Emergency-Stop pulsed

Table 2.3: DIP switches
In order to set the DIP switches, a suitable screwdriver is used to remove the transparent
cover. The cover is replaced after setting the switches. If the DIP switches are actuated
during operation, the control unit switches to the safe condition (Outputs switched-off) and
the 7-segment indicator displays a P. In addition, output 15/16 flashes (Ready for startup).

12.3.12

1 +5

Position
OFF
ON
OFF
ON
OFF
ON
OFF
ON

Date of issue

Switch

Part No. 109008

The table shows the operating modes that can be selected.

SLVA-4Kplus Control unit
Product description

The safety device must be checked after every change of the DIP switch
settings (see Section 6).

Changes to the settings in accordance with table 2.3 must be marked in the appropriate
boxes on the type label.
2.5.2 Start-up/restart interlock
The start-up/restart interlock prevents the dangerous motion from switching on again of its
own accord after the protected area has been entered. The switch for the start-up/restart
inhibit should be located such that it can be seen from the area of danger and yet it is not
possible for it to be actuated from within this area.
In order to switch the plant/machinery on again, the start-up/restart enable (Terminals 34) must be actuated for 0.05 s ... 1 s. The dynamic enable serves to provide protection
against static faults in the start-up enable circuit.
The devices are supplied with on or off-switched start-up/restart inhibit. The product type
plate is marked to identify this feature.
Any change made to this setting using the DIP switches must be marked in the appropriate
fields on the product type plate.
2.5.3 Relay monitor
The relay monitor provides a monitoring function via the SLVA-4Kplus for externally connected relays (or protection devices / contactors). The wiring of the relay monitor is illustrated in figure 2.4. Any number of normally-closed contacts of any number of relays can
be connected in series.
In the figure, K1 and K2 are positive-action relays. The normally-closed contacts K1K and
K2K (control contacts) must ensure a secure contact at 24 V / 5 mA. Attachable auxiliary
contacts or the contacts of auxiliary relays normally satisfy this requirement.

Date of issue

12.3.12

Part No. 109008

A surge withstand capability of 6 kV between the control contacts and
other contacts, which carry critical voltages, must be guaranteed by the
relay manufacturer. The relay operating circuit must be protected with a
fuse having a maximum nominal value of 60 % of the load rating of the
relay contacts, in order to prevent welding of the contacts.
The relays are monitored with a delay of 200 ms after the switching operation. If the new
switching state has not been achieved after 200 ms, the SLVA-4Kplus assumes an inhibit
state and fault F is indicated on the diagnostic display.
The devices are supplied with either a connect or disconnect relay monitor. This function
is indicated on the type label. Any modification to this setting using the DIP switches must
be marked in the appropriate box on the type label.

SLVA-4Kplus Control unit
Product description

SLVA-4Kplus

5
19

6 21
7
20

8
22

3
23

9
24

K1K
K2K
K1
Fig. 2.4:

Relay monitor

2.5.4 Emergency-Stop
In the Emergency-Stop operating mode, the two channels of an Emergency-Stop circuit
are connected in place of the light barriers 3 and 4. There are two versions of this arrangement:
1. Static operation: Both channels switch the 24 V static voltage to the receiver inputs of
light barriers 3 and 4. Due to the resulting loss of the cross-circuit monitoring, the two
channels of the Emergency-Stop circuit must either be laid in separate cables or in a
common mechanically-protected cable. The current loading of the Emergency-Stop circuit is approx. 10 mA.
2. Pulse operation: The two channels switch a connection between the transmitter outputs
of light barriers 3 and 4, on the one hand, and on the other hand between the receiver
inputs of light barriers 3 and 4. Due to the existing short-circuit and cross-circuit monitoring, the protected laying of the Emergency-Stop circuit is not necessary. The mean
current loading of the Emergency-Stop circuit is very low, so that the Emergency-Stop
switches that are used for zero-current switching are suitable.

Date of issue

12.3.12

The Emergency-Stop would also function in the DIP switch settings
XX00 XX00 and XX01 XX01, however, in this case there is no simultaneity monitoring (not permissible)! Therefore, if a pulsed Emergency-Stop
is used, care must be taken to ensure that the DIP switches remain in the
settings XX11 XX11!

Part No. 109008

If Emergency-Stop switches are attached, the start up/restart interlock
mode must be activated to prevent a start up/restart, when unlocking the
Emergency-Stop switches (EN 418).

SLVA-4Kplus Control unit
Product description

2.6

Indicator lights

2.6.1 Internal control unit indicator lights
The functions of the control unit indicator lights are shown in table 2.4. The digital display
indicates the operating and fault conditions of the BWS (see Section 9). A fault condition
is indicated when the decimal point on the 7 segment display flashes. The LEDs R1-R4
(yellow) indicate the reception status of the connected light barriers or of the connected
Emergency-Stop circuit. The OSSD LED (ON = green, OFF = red) indicates the status of
the safety outputs (OSSDs).
LED

red
green
yellow

7-Segment indicator

OSSD outputs OFF
OSSD outputs ON
Indicator for channels (1-4)
On = Light beam free or Emerg.-Stop On
Flashing = Light beam free, stability control inadequate
Off = Light beam broken or Emerg.-Stop circuit switched
off
Protected area clear, OSSD ON (Run light) (symbol elements light in turn, clockwise)
Protected area obstructed
Protected area clear, OSSD OFF,
Ready for start-up
System fault
DIP switch setting incorrect
Short-circuit, transmitter connection
Fault, simultaneity condition
Emergency-Stop channel

Date of issue

12.3.12

Part No. 109008

Fault in an external relay
DIP switches being set
Table 2.4: Control unit indicator lights
2.6.2 External indicator lights
The external indicator lights have to be connected to the control unit by the operator.
These are not included in the delivery package. The external start-up readiness indicator
light must be clearly visible.

SLVA-4Kplus Control unit
Product description

Start-up readiness indicator light:
• Installation - see Section 5
• ON status (yellow): System waiting to be enabled
• OFF status: protected area clear, OSSD On or protected area obstructed, OSSD Off
• Status indicator flashing: Control unit in the fault condition or operating mode is set.
• see Section 7.1 for connection values, indicator outputs.
Indicator light for the output relay:
2 indications, red and green, for the output relay status (OSSD). Standard version with direct LED control, optional relay output with changeover contact (Centre contact on terminal 15).
•
•
•
•

For installation, see Section 5.
ON status (green): Output relay On
ON status (red): Output relay Off
See Section 7.1 for connection values, indicator outputs.

2.6.3 Light barrier and light grid indicators
Each receiver has an LED that signals the receiver status. Indications are given of light
beam broken (Indicator dark) and light beam unbroken. Incorrect alignment of the light
barrier is also indicated.
Type
SLA5
SLA5S
SLA20
SLA25
SLA40
SLP

red
yellow
not avail- dark
able
lit
dark

green
dark
dark
lit

dark
not available
flashing
lit

SLA28

lit
dark
flashing lit

dark
dark

dark

lit

dark

Meaning
Light beam broken
Light beam unbroken, stability control inadequate
Light beam unbroken
Light beam broken
Light beam unbroken, stability control inadequate
Light beam unbroken
The SLP has an additional red LED, near the
connector cap, as a power supply indicator.
Light beam broken
Light beam unbroken, stability control inadequate
Light beam unbroken

The input test causes the system to execute a system reset, followed by a restart. The
complete switching system is tested, including the safety outputs. The same effect is
achieved if the power supply is switched off for at least 1s. The wiring of the connection is
not absolutely necessary.
The system reset is used to accept failure conditions on the unit and to check the switching capability of the safety outputs.

12.3.12

Test

Date of issue

2.7

Part No. 109008

Table 2.5: Light barrier indicator lights

SLVA-4Kplus Control unit

Arrangement and combination of light barriers and light grids

Arrangement and combination of light barriers and light grids
Light barriers of the SLA type and light grids of the type SLP are through beam photoelectric sensors, generally consisting of a transmitter and a receiver. Together with the
SLVA4-Kplus control unit they form a BWS of Type 4 (EN 61496-1) or Category 4
(ISO 13849-1). Up to 4 light barriers or light beams can be connected to one control unit.
SLA light barriers and SLP light grids connected to the same control unit do not subject
one another to mutual interference. Light barriers and grids that are connected to different
control units should be arranged such that the transmitters of one group of light barriers
do not irradiate the receivers of the other group of light barriers, so that mutual interference
is avoided.
Light barriers type SLA and SLP light grids that are approved for connection to SLVA system control units can be mixed arbitrarily, provided that the transmitters and receivers are
of the same type. Further data can be obtained from the respective technical information
on the light barriers and light grids.
The SLA light barriers and SLP light grids must only be connected to control units in the
SLVA family.
In addition to the differences in range and housing construction, the light barriers and light
grids also differ in respect of their electrical connections. The light barriers have either a
fixed cable connection, a plug connection or are provided with a terminal compartment,
into which the user inserts and attaches the cable connections. The connections that have
to be made are shown in figure 3.1 and figure 3.2. The SLP light grids are fitted with a terminal compartment.

Date of issue

12.3.12

Part No. 109008

The SLP light grids are suitable for access security functions with 2-4 protective beams.
The distances between the protective beams are as prescribed in ISO 13855. The wiring
between the control unit and the transmitter/receiver is shown in Figure 6.

SLVA-4Kplus Control unit

Arrangement and combination of light barriers and light grids

TEST

RESTART

24V

OSSDs

Receiver

OSSD1

OSSD2

RELAY MONITOR T1

Transmitter 4

Transmitter 3

Transmitter 2

Transmitter 1

Fig. 3.1:

2
TEST

RESTART

Connection of light barriers with terminal compartment connections (e.g.
SLA28) and with plug connection (e.g. SLA5(s)/92, SLA40/92 SLA28/104).
Caution: On transmitter type SLA20, connect terminal 2 in place of terminal 4.

24V

OSSDs

BU BK BN

Receiver

Transmitter 4

Transmitter 3

Transmitter 2

Transmitter 1

12345678

SLVA-4Kplus

ON
OFF

POWER

Receiver

SLVA-4Kplus

ON
OFF

Receiver

12345678

POWER

OSSD1

OSSD2

RELAY MONITOR T1

BK=black, BU=blue, BN=brown

Connection of light barriers with fixed cable (e.g. SLA5(S), SLA40)

Date of issue

Fig. 3.2:

12.3.12

Part No. 109008

SLVA-4Kplus Control unit

Arrangement and combination of light barriers and light grids

GN R4 R3 R2 R1 + U
1

2
TEST

RESTART

24V

OSSDs

12345678

SLVA-4Kplus

ON
OFF

OSSD1

SLP-Receiver

OSSD2

RELAY MONITOR T1

SLP-Emitter

Fig. 3.3:

T4 T3 T2 T1

Connection of SLP light grid
The light barriers must be installed in such a way, that it is not possible to
gain access to the danger area by by-passing the light barrier.
In other words, it must not be possible to:
• Crawl under the lowest beam.
• Reach over the highest beam.
• Step through between two beams.

Part No. 109008

Danger area

Minimum distance S

Date of issue

12.3.12

Transmitter SLA (SLP) Receiver SLA (SLP)
Protected area
Fig. 3.4:

Minimum distance, protective beam(s)

The light barriers should be installed in such a way that they can be adjusted.

SLVA-4Kplus Control unit

Arrangement and combination of light barriers and light grids

Calculation of the minimum distance from the danger area is in accordance with the relevant specifications and standards. In accordance with ISO 13855, the minimum distance
is calculated from the formula:
S=K·T+C

where:

S = Minimum safety distance in mm (Separation between the boundary of the danger area
and the boundary of the protected area)
K = Approach speed constant in mm/s
T = Total response time in s,
T=t1+t2
t1 = Response time of the protective device (40 ms)
t2 = Response time of the machine
C = Additional distance in mm. This distance depends on how far a person can enter into
the danger area before the safety device is actuated.
For access security:
S = K · T + 850 mm
In accordance with ISO 13855, the following heights are recommended for the individual
beams:
No. of beams
2
3
4

Height above the reference plane (mm)
400, 900
300, 700, 1100
300, 600, 900, 1200

Table 3.1: Installation heights
Care should be taken that there are no reflecting objects within the transmitter or receiver
lobes, which could cause reflections around an obstacle (see EN 61496-1).

Reflecting object outside of the
light beams area
Minimum distance a
5˚

Transmitter

Receiver

Part No. 109008

5˚

Reflection around obstacle

Date of issue

Fig. 3.5:

12.3.12

Obstacle

SLVA-4Kplus Control unit

Installation/removal of the control unit

Installation/removal of the control unit
In order to install the control unit, a standard 35 mm rail to DIN EN 50022-35 is fixed to the
base on which the installation is to be made. A plastic profile and spring-loaded latching
device are provided on the underside of the control unit. The control unit is positioned with
its underside on one edge of the standard rail and then pushed on to the latching device.
To remove the control unit, the latching device is pulled back with a screwdriver to allow
the unit to be extracted. Sufficient space must be allowed above the screw terminals to enable a screwdriver to be inserted.

Installation

5.1

SLA light barriers and SLP light grids
The transmitters are connected to terminal pairs 25-26 (S1), 27-28 (S2), 29-30 (S3) and
31-32 (S4) in accordance with the colour coding.
Likewise, the receivers are connected to terminals 7-8-9 (E1), 7-8-10 (E2), 11-12-13 (E3)
and 11-12-14 (E4) in accordance with the colour coding.
The length of the connection cable between the light barriers and the control unit must not
exceed 50 m. The cable for connecting the light barriers is specified in Section 7.2.
If less than 4 light barrier channels are to be operated, the channel that is not used must
be replaced by a jumper, for which a length of up to 3 m is permissible.
Light barrier channel to be replaced
1
2
3
4

Jumper between
25-9
27-10
29-13
31-14

Table 5.1: Jumpering of unused light barrier channels
5.2

Emergency-Stop circuit
For Emergency-Stop operation, the Emergency-Stop circuit is to be connected to the control unit in accordance with figure 10.1 or figure 10.3.

Date of issue

12.3.12

Part No. 109008

In the case of a static Emergency-Stop, the cabling of the EmergencyStop circuit is to be provided with protection.

5.3

Indicator lights
A green/red indicator light is to be connected to the output 5/6. The output is to be laid out
so that an anti-parallel circuit for a green and a red LED can be connected without series
resistors, in which a current of approx. 9 mA flows. Appropriate circuitry must be provided
if heavier current indicator lights are required. The output data is provided in section 7.1.
For operation with a start-up interlock (Restart), an easily visible yellow indicator light must

SLVA-4Kplus Control unit
Installation

be connected to output 15/16. This indicator light signals to the operator that the start-up
enable has to be activated to switch the system on. It is a zero-potential output, therefore
the indicator light must be supplied from an external power source.
In the SLVA-4KPlus-2528 option, the output 5/6 is controlled by a relay, whose common
contact is connected to terminal 15, so that heavier current indicator lights can be connected. The circuit is illustrated in figure 10.4. The indicator light circuits are protected internally by a 2.5 A automatic fuse that can be reset.
5.4

Safety outputs
The safety outputs (OSSDs) 19-22 are zero-potential, normally-open contacts, without
cross-circuit monitoring. Connection to the system is achieved with a protected cable or
to protect from short circuit by an apropriate wiring. The withstand voltage must be adequate to provide safe isolation.
In the case of an inductive load, the output contacts must be protected
against the increased loading by RC combinations or free-wheeling
diodes. The circuitry must be provided by the user. Note that when using
free-wheeling diodes, the contact release time of the connected relays or
contactors should be increased.
If DC loads are switched with the outputs, the permissible switching capacity stated in section 7 should be noted.
When interconnecting the control unit in the machine safety control system, the factors
considered should take account of the instructions in EN 61496-1 (Interface connection of
the BWS series-connected control elements).

5.5

User check lists

5.5.1 Before installation
• Have the related standards been taken into account? (See Section 14)
• Are the SLVA4-Kplus control unit and the light barriers/light grids of the prescribed type
available in the appropriate quantities?
• Are jumper cables available for the unused channels?
• Is the SLVA4-Kplus suitable for the required operating voltage (Note type label)?

• Will the SLVA4-Kplus be installed into a control cabinet or built into a housing with a protection class of at least IP54/NEMA 3?
• In the case of a relay monitor: Is the necessary safe isolation between the normally
closed control contact and other contacts, in accordance with overvoltage category 4
(EN 50178), guaranteed by the relay or contactor manufacturer?

12.3.12

• Is there sufficient space above the screw terminals of the SLVA4-Kplus for installation
and removal?

Date of issue

• Has the control unit been supplied with the correct setting for start-up/restart interlock
and relay monitor (see type label)?

Part No. 109008

• Has the overvoltage category required in accordance with EN 50178 been achieved in
respect of voltages from the output connections and power supply connections to other
connections?

SLVA-4Kplus Control unit
Installation

5.5.2 After installation
• Are all the light barriers/light grids correctly connected?
• Have the unused channels been bridged?
• Is there a red/green LED in a visible position to indicate the status of the outputs, or has
the prescribed red/green indicator light been provided by an alternative means?
• For start-up/restart interlock:
- Is the restart input connected?
- Is the test input connected?
- Is there a clearly visible yellow indicator light to signal start-up readiness?
• For relay monitor:
- Is the relay monitor input connected to at least 2 positive-action N.C. relays in series?
- Are the operating contacts of the external relays protected against contact welding
by a suitable fuse?
• Are the light barriers arranged in such a way that it is not possible to access the danger
area by avoiding them?
• Have the light barriers been adjusted?
• Emergency-Stop circuit, static operation: Has attention been paid to the fact that the cable between the Emergency-Stop switch and the switching device must be protected,
or that the two Emergency-Stop channels must be laid in separate cables?
• Emergency-Stop circuits, pulse operation: Has attention been paid to the fact that the
Emergency-Stop switch must be suitable for switching smaller loads (see Section 7.1)?
5.5.3 Commissioning
• Has each beam of the safety device been checked after installation for effective detection, using a test piece of the prescribed diameter?
• Has the start-up/restart interlock (if activated) been checked for correct function?
• In case of attached Emergency-Stop-switches, is the start-up/restart interlock mode activated?
• Has the relay monitor (if activated) been checked for correct function?
• Have the Emergency-Stop circuits (if activated) been checked for correct function?
• Has the set operating mode been entered on the supplementary label?
• Is the protected area penetrated at least once each day of operation, the system
switched on and the contact test/fault enable activated?
• Is the effectiveness of the Emergency-Stop circuits checked at the prescribed distances?

Date of issue

12.3.12

Part No. 109008

5.5.4 Periodic check

SLVA-4Kplus Control unit
Commissioning

Commissioning
After the installation of the system, commissioning is initiated by switching on the power
supply.

6.1

Adjustment
Adjustment is simplified by the visible red light of the light barrier transmitter. The adjustment commences at the transmitter: The transmitter light spot is adjusted to the position
occupied by the receiver. In executing this, the visible red light is either observed directly
at the receiver by looking into the transmitter (not dangerous!) or after positioning a retroreflector at the position of the receiver, observed from the transmitter side. It should be
noted that the eye must be positioned close to the light beam axis. If this is not possible, a
deflecting mirror can be used as an aid in making the adjustment. After adjusting the transmitter, the receiver is adjusted such that its indicator lights signal unbroken light beams
with adequate stability control (see section 2.6.3).

6.2

Checking the detection capability
• Remove all objects from the paths of the beams.
• Using the test rod prescribed for the light barriers, break the light beams one after the
other.
• Ascertain whether the output relays switch off as required and the output relay indicator
changes from green to red. Also check that the broken beam is indicated at the control
unit by the extinguishing of the associated reception indicator on the control unit.

6.3

Checking the start-up/restart interlock and start-up enable
• Break one beam and then leave all the beams unobstructed.
• The output relays must remain inhibited, due to the existing start-up interlock and the
yellow start-up readiness indicator light must come on.
• Operate the restart button.
• The output relays must switch-on and the start-up readiness indicator must go out.

6.4

Checking the test input
• Remove all objects from the light beam paths.
• If a start-up interlock is in effect, operate the start-up enable.
• The output relays must switch-on.
• The output relays must switch-off during the actuation.

6.5

Checking the relay monitor
• Disconnect the leads from connections 23 or 24.

Part No. 109008

• Actuate Test.

• Reconnect the leads.

Date of issue

• Note the SLVA4-Kplus digital indicator. If .F is displayed, the relay monitor is active.

12.3.12

• Switch on the SLVA4-Kplus.

SLVA-4Kplus Control unit
Commissioning

6.6

Checking the static Emergency-Stop
Switch on all Emergency-Stop switches, make sure all the light beams are unobstructed
and enable the start-up. The safety outputs must then be in the switched-on state.
Operate an Emergency-Stop switch. The safety outputs must then be in the switched-off
state and the control unit digital indicator must not display a fault.
This check must be repeated for all Emergency-Stop switches on the Emergency-Stop
circuit.

6.7

Checking the pulsed Emergency-Stop
The check is carried out in the same way as for the static Emergency-Stop.

Date of issue

12.3.12

Part No. 109008

For the pulsed Emergency-Stop an additional check must be made to
ensure that the DIP switches occupy the positions XX11 XX11!

SLVA-4Kplus Control unit
Technical data

Technical data

7.1

General specifications
Approvals
Tests
Safety type
Performance Level
Safety Integrity Level (SIL)
Category
Marking

7.2

TÜV, cNRTLus
EN IEC 61496; EN ISO 13849; EN 55022
The specified standards refer on the respective
current version of the normative documents
4 (EN IEC 61496)
PL e (EN ISO 13849)
SIL 3 (EN IEC 61508)
Cat. 4 (EN ISO 13849)
CE

Electrical data
Supply voltage:
230 VAC version:
115 VAC version:
24 VDC version:
24 V AC/DC version, option 2528
Current consumption:

230 V AC (-15%, +10%), 48 Hz ... 62 Hz
115 V AC (-15%, +10%), 48 Hz ... 62 Hz
24 V DC (-15%, +15%)
24 V AC/DC (-10%, +10%)

230 VAC version:
115 VAC version:
24 VDC version:
24 V AC/DC version, option 2528
Power consumption:

 50 mA
100 mA
220 mA
220 mA

230 VAC version:
115 VAC version:
24 VDC version:
24 V AC/DC version, option 2528
Rating:

13 W
13 W
7W
7W

230 VAC version:
115 VAC version:
24 VDC version:
24 V AC/DC version, option 2528
Response time:
Activation current and voltage for potentialfree control contacts
Activation time for start-up enable(restart)
and error enable (reset)
Relay monitor:
Switching voltage:
Switching current:
Detection of maloperation:
Emergency-Stop circuits:

II (IEC 61140)
II (IEC 61140)
III (IEC 61140)
III (IEC 61140)
40 ms
8 mA / 24 V

24 V DC continuous or 12 V DC pulsed operation
10 mA
2 s after switch over

Part No. 109008
12.3.12

Actuation current:
Indication of maloperation:

24 V DC
10 mA
200 ms after switch over

Date of issue

Switching voltage:

0.05 s .... 1 s

SLVA-4Kplus Control unit
Technical data

OSSD-outputs, isolated relays outputs at
clamps 19 to 21:
Switching voltage AC/DC:
Switching current AC:
Switching current DC:
Switching frequency:
fusing:
Outputs for indicators:
Output for indicator "OSSD", isolated relays outputs between clamps 5 and 6, option 2528 only
Switching voltage AC/DC:
Switching current AC:
fusing:
notice:
Outputs for LED-indicators between clamps 5
and 6
Voltage:
Current:

7.3

20 V AC/DC ... 230 V AC/DC
0.01 A ... 2 A
see load limit curve
Maximum 1/s
fuse T2A

24 V AC/DC
0.01 A ... 1.5 A
Polyfuse (re-settable)
Supply via clamp 15

max. 5 V
max. 10 mA

Other data
Ambient conditions:
Operating temperature:
Storage temperature:
rel humidity, uncondensed:
Wiring:
connection:
conductor cross section:
Weight:
Housing material:
Protection class:
notice
Length of the connection cable:

terminal clamps with terminal screws
litz wire with sleeve, max. 1.5 mm²
900 g
Polycarbonate / UL-94 V-0
IP 20 / NEMA 1
mounting in a switch cabinet or enclosure
with rating IP54/NEMA 3 or better is
demanded
max. 50 m
max. 100 m

Date of issue

12.3.12

Part No. 109008

between control unit and light barriers:
between control unit and system:

0 ºC ... 50 ºC
-20 ºC ... 75 ºC
max. 95 % (at temperatures between
20 °C and 50 °C)

SLVA-4Kplus Control unit
Technical data

7.4

Dimensions

152

73.2

118.2

Fig. 7.1:
7.5

Dimensions

Curves and diagrams
Current [A]
8
6
4
3
2
1
0.8
0.6
0.4
0.3
0.2

100

150

200

250

Voltage [V DC]
1) inductive load, L/R = 40 ms
2) ohmic load

Load limit curves with direct current across the outputs

Date of issue

Fig. 7.2:

12.3.12

0.1

Part No. 109008

SLVA-4Kplus Control unit
Periodic checks

Periodic checks
The periodic check is a check of the output relay. This must be carried
out if there is uncertainty that
- Penetration of the protected area takes place at least once daily
- Or that the device is not switched-on once per operating day.
The check is carried out as follows:
1. Clear the protected area and enable start-up.
2. Penetrate the protected area by breaking any one beam and observe the indicator on
the control unit or the external indicator light. These must change from green to red.
3. If the BWS does not enter a fault condition, the check is complete. If a fault condition is
indicated, the fault must be eliminated and the check repeated.

Fault elimination
In all cases, faults in the system cause the system to switch to the safe condition. Most
faults cause the system to enter a fault condition, which is identified by a fault code to assist in isolating the fault. Output 15/16 generates a clock signal of approx. 1 Hz when the
system enters a fault condition. This signal can be used to provide a fault indication remote from the control unit. Several faults, which have their origin outside the control unit,
do not generate a fault indication. If a fault occurs, the operator activates the fault enable
and then checks whether the system runs again. If the system does not restart, an attempt
should be made to return to normal operation by switching the power supply off and then
on again.
Under high-frequency fields which exceed a field strength of 10 V/m, the outputs of the
SLVA-4Kplus may switch to the safe state.

Date of issue

12.3.12

Part No. 109008

The following table lists a number of fault situations in which self-help is possible.

SLVA-4Kplus Control unit
Fault elimination

Fault
No indicator lights come on any of
the components in the system.
External protected area indicator
(5-6) does not light.
Start-up readiness indicator (1516) does not operate.
Start-up enable does not function.

Operator action
Check power supply.
Check installation and indicator lights.
Check installation.

Check whether the indicator lights E1-E4 light. If
they do not, then a beam has been interrupted. If
the start-up readiness indicator is indicating, the
restart input connection should be checked.
Fault 2 is indicated.
Check the transmitter installation.
Fault F is indicated.
Check relay; check connection between relay
and relay monitor.
The protected area is not clear: 0 is Check on the control unit (E1-E4) to see if a
indicated.
beam is broken. Readjust if necessary. Emergency-Stop operating mode activated: Emergency-Stop circuit is open, or pulse operation is
wired-in and static Emergency-Stop selected via
operating mode.
The beam is still not clear after
Check receiver installation.
adjustment.
One output cannot be switched.
Check the fuses on terminals 20-21 and 22-23
with start-up enabled and replace if necessary.
Check installation.
Fault E is indicated.
Either short-circuit of a receiver to +UB or interference from another light barrier.
Fault E is indicated/EmergencyThe Emergency-Stop operating mode is wired-in,
Stop operating mode set
but pulse operation is selected via the operating
mode setting.
Fault E is indicated
Internal fault. Switch-off and then on again or
activate test. If there is no short-circuit on the
receiver leads, send the unit for repair.

Date of issue

12.3.12

Part No. 109008

Table 9.1: Fault elimination

Date of issue

12.3.12

Part No. 109008

K1G

Power contactor

Fig. 10.1:
K2G
Indicator circuit contacts
K1B
K2B
Make contacts
1
2
3
4
5
6
7

GND

bu
GND
bn
+24 V
bk
out

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

Restart

GND

Operating voltage
+24V out
Operating voltage
Test
OSSD1
+24V out
OSSD1
Start- up enable
OSSD2
Indicator gn
OSSD2
Indicator rd
+24V out
GND out
Relay monitor
+24V out
Sender 1
Receiver 1
GND out
Receiver 2
Transmitter 2
GND out
GND out
+24V out
Transmitter 3
Receiver 3
GND out
Receiver 4
Transmitter 4 Start- up readyness
GND out
Start- up readyness

17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32

SLVA-4Kplus Control unit

Circuit examples

The figure 10.1 shows a circuit with 4 light barriers, start-up/restart interlock and relay
monitor. In this example, the SLA5 is used as a light barrier. The DIP switches are set to
1100 1100.
gn

rd
ye

Test

SLA5-R

SLA5-T

K1A

Power contactor

K2A

ON
8

Power circuit

Connection schematic for operation with 4 light barriers, start-up /restart inhibit and relay monitor.

Date of issue

12.3.12

Part No. 109008

The circuitry for connections 20-25
is not shown in this diagram

Fig. 10.2:

30
1
2
3
4
5
6
7

GND

bu
GND
bn
+24 V
bk
out

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

Restart

GND

Operating voltage
+24V out
Operating voltage
Test
OSSD1
+24V out
OSSD1
Start- up enable
OSSD2
Indicator gn
OSSD2
Indicator rd
+24V out
GND out
Relay monitor
+24V out
Transmitter 1
Receiver 1
GND out
Receiver 2
Transmitter 2
GND out
GND out
+24V out
Transmitter 3
Receiver 3
GND out
Receiver 4
Transmitter 4 Start- up readyness
GND out
Start- up readyness
rd

17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32

SLVA-4Kplus Control unit

Circuit examples

The figure 10.1 shows a connection schematic for a static Emergency-Stop. In this
scheme, the Emergency-Stop cable must be protected. The DIP switches are set to
XX10 XX10.
gn

EMERGENCYSTOP

Test
ye

SLA5-R

SLA5-T

ON
8

Connection schematic for operation with 2 light barriers and static Emergency-Stop.

SLVA-4Kplus Control unit
Circuit examples

The figure 10.3 shows a connection schematic for a pulsed Emergency-Stop. In this
scheme, mechanical protection of the Emergency-Stop cable is not necessary. The Emergency-Stop switch must be suitable for the switching of low currents. The DIP switches are
set to XX11 XX11.
The pulsed Emergency-Stop likewise functions in the DIP switch settings
XX00 XX00 and XX01 XX01. However, simultaneity of the channels is
not monitored. Therefore a short-circuit in one channel is then not
covered, e.g. from SLVA4-Kplus connection15 to SLVA4-Kplus connection 31!
gn
rd
ye

Restart

The circuitry for connections 20-25
is not shown in this diagram

bu
GND
bn
+24 V
bk
out

SLA5-R

GND
6

in
bk

GND

SLA5-T

Connection schematic for operation with 2 light barriers and pulsed Emergency-Stop.

Date of issue

12.3.12

Part No. 109008

Fig. 10.3:

bu
GND
bn
+24 V
bk
out

EMERGENCYSTOP

17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

Test

SLVA-4Kplus Control unit
Ordering information

The figure 10.4 shows a connection schematic for the SLVA4-Kplus 2528, that has a relay
output in place of the LED control circuit. Other details have been omitted.
rd

17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

Fig. 10.4:

Connection schematic for the SLVA4-Kplus 2528

Ordering information
SLVA4-Kplus
Power supply

Order numbers
AWS

AWS & RM

24 V DC

SLVA-4Kplus
24VDC

SLVA-4Kplus
24VDC-RI

SLVA-4Kplus
24VDC-RM

SLVA-4Kplus
24VDC-RI,RM

115 V AC

SLVA-4Kplus
115VAC

SLVA-4Kplus
115VAC-RI

SLVA-4Kplus
115VAC-RM

SLVA-4Kplus
115VAC-RI,RM

230 V AC

SLVA-4Kplus
230VAC

SLVA-4Kplus
230VAC-RI

SLVA-4Kplus
230VAC-RM

SLVA-4Kplus
230VAC-RI,RM

Date of issue

12.3.12

Part No. 109008

Without AWS &
RM

SLVA-4Kplus Control unit
Guarantee conditions

SLVA-4KPlus-2528
Version with relay contacts for OSSD indication in place of LED initiation (Terminals 5, 6
and 15))
Power supply

Order numbers

24 V AC/DC

SLVA-4Kplus-2528 24VAC/DC

115 V AC

SLVA-4Kplus-2528 115VAC

230 V AC

SLVA-4Kplus-2528 230VAC

The operating modes AWS, RM and Emergency-Stop channels have to
be set by the user. The factory setting on delivery is AWS switched-on.

Guarantee conditions
The guarantee period for the SLVA4-Kplus control unit is 12 months, in accordance with
the general conditions of supply of the ZVEI.
Repairs must only be carried out by the manufacturer. Interference or modification of the
unit is not permitted. Such action will lead to invalidation of the guarantee.

Glossary
OSSD

Output signal switching device

BWS

Non tactile protection device

AWS

Start-up/restart interlock

Relay monitor

Date of issue

12.3.12

Part No. 109008

SLVA-4Kplus Control unit
Standards

Standards
The relevant laws and standards apply to the use of photoelectric protective devices. There are differences depending on the area of use. The following regulations are relevant
within the EU and Germany.

14.1 Construction and equipping of protective equipment
IEC 61496-1

Safety of machinery. Electro-sensitive protective equipment

IEC 61508,

Functional safety of EEPE safety-related systems

DIN V VDE0801

Principles for computers in systems with safety tasks

DIN EN 62061

Safety of machinery - Functional safety of safety-related electrical, electronic
and programmable electronic control systems

IEC 50178

Electronic equipment for use in power installations

DIN IEC 68

Electrical engineering; basic environmental testing procedures

DIN EN 60204-1

Safety of machinery - electrical equipment of machines

DIN EN 61140

Protection against electric shock - common aspects for installations and
equipment (IEC 61140:2001 and A1:2004, modified)

DIN EN 60664-1

Coordination of the insulation of electronic equipment in low-voltage systems Part 1: Principles, requirements and tests (IEC 60664-1:2007)

DIN EN 60068-1:199503

Environmental testing - Part 1: General matters and guidance

Directive 98/37/EC,
from 29.12.2009
Directive 2006/42/EC

Machinery Directive

EN ISO 12100

Safety of machinery - electrical equipment of industrial machines

EN ISO 13849-1

Safety of machinery - safety relevant parts of controls- part 1: General design
principles

DIN CLC/TS 62046,
preliminary standard,
2005-09

Safety of machinery - Use of protective equipment to recognize the presence
of people (IEC/TS 62046:2004)
Safety of machinery - The positioning of protective equipment with respect to
approach speeds of parts of the human body

EN999/EN ISO 13855

Safety of machinery - The positioning of protective equipment with respect to
approach speeds of parts of the human body

ZH1/597

Safety rules for non-contact protective equipment on powered equipment

EN ISO 13857

Safety of machinery - Safety distances to prevent hazard zones being reached
by upper and lower limbs

Date of issue

12.3.12

In addition to the stipulations listed there may be other applicable standards for special
machinery and applications that should be considered.

Part No. 109008

14.2 Use and installation of protective equipment

Part No. 109008
2012-03
Date of issue

With regard to the supply of products, the current issue of the following document is applicable:
The General Terms of Delivery for Products and Services of the Electrical Industry, published by the Central
Association of the Electrical Industry (Zentralverband Elektrotechnik und Elektroindustrie (ZVEI) e.V.)
in its most recent version as well as the supplementary clause: "Expanded reservation of proprietorship"

FABRIKAUTOMATION –
SENSING YOUR NEEDS

Zentrale weltweit
Pepperl+Fuchs GmbH
68307 Mannheim · Deutschland
Tel. +49 621 776-0
E-Mail: info@de.pepperl-fuchs.com
Zentrale USA
Pepperl+Fuchs Inc.
Twinsburg, Ohio 44087 · USA
Tel. +1 330 4253555
E-Mail: sales@us.pepperl-fuchs.com
Zentrale Asien
Pepperl+Fuchs Pte Ltd.
Singapur 139942
Tel. +65 67799091
E-Mail: sales@sg.pepperl-fuchs.com

www.pepperl-fuchs.com
Änderungen vorbehalten
Copyright PEPPERL+FUCHS • Printed in Germany

DOCT-0183A

109008
03/2012

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