NEC NWA-055300-004 NWA-055300-004 MODEM-A User Manual NWD 107458 04E Safety
NEC Corporation NWA-055300-004 MODEM-A NWD 107458 04E Safety
NEC >
Users Manual
- 1-
SAFETY INFORMATION NWD-107458-04E
March, 2011
SAFETY INFORMATION
The safety information provides admonishments regarding installing, operating, and
maintaining the equipment. To prevent the equipment damages or body injuries,
please familiarize yourself with the contents of safety information and other
instruction manuals before installing/operating/maintaining the equipment. The
indications (Danger, Warning and Caution) shown below are used in the Instruction
manuals:
GENERAL
DANGER
Indicates an imminently hazardous
situation which, if not avoided, will result
in death or serious injury.
WARNING
Indicates an imminently hazardous
situation which, if not avoided, could
result in serious injury or physical
damage.
CAUTION
Indicates a potentially hazardous
situation which, if not avoided, may
result in minor or moderate injury or
physical damage. It is also said to alert
against inappropriate practice.
This system should be installed, powered on and maintained only by
the appropriate service personnel, who is/are skilled enough to be
aware of hazards to which the personnel may be exposed during
operation, and of measures to minimize the risks to the personnel or
others.
- 2 -
NWD-107458-04E SAFETY INFORMATION
LABELS
Caution and Warning labels attached to the IDU and ODU are as follows:
To prevent IDU and ODU from being damaged, do not disconnect I/F cable between
IDU and ODU while in operation .
The –48 V DC power is superimposed on the center
conductor of the I/F cable between IDU and ODU.
Connecting the test equipment directly to this
terminal may damage it and touching the coaxial
cable core may cause an electrical shock.
For ODU Type (13-38 GHz)
Ensure not to touch the top surfaces of the IDU and
ODU that are heated while in operation.
-
48V
IFL
RX LEV MON
!
IFL
- 3 -
SAFETY INFORMATION NWD-107458-04E
Caution that the Non-ionizing radiation from the
equipment may affect the health.
CLASS 1
LASER PRODUCT
In a system using the optical modules, do not stare
at the laser beams directly.. Laser radiation may be
hazardous to eyes and skin.
The electrical and electronic products with this
symbol are products to follow WEEE. Disposal of
NEC equipment or any part of NEC equipment with
this mark should comply with regulations
implemented by the local authorities or the
agreement with NEC.
The equipment with this symbol is the subject to
compliance with China RoHS in terms of the
environmental protection applied to the electrical and
electronic equipment.
If the caution and warning labels above are out of sight due to the installed condition,
please contact NEC.
- 4 -
NWD-107458-04E SAFETY INFORMATION
WARNING
WARNING
The –48 V DC power is superimposed on the center conductor
of the coaxial cable between IDU and ODU. Connecting the
test set equipment directly to this terminal may damage it, and
touching the core of coaxial cable may cause an electrical
shock.
The ODU is designed for using –48 V DC at outdoor
environment. Pay attention to a risk of electric shock where
the wet condition reduces the contact resistance of the body.
WARNING
Do not touch the core of I/F cable jack before turning the
power off, or it may cause an electrical shock.
WARNING
In a system using the OPT INTFC modules, do not stare or
look at the laser beams directly especially when using the
optical instruments, or it may cause damages to eyes and
skin. (Class 1 Laser Product).
- 5 -
SAFETY INFORMATION NWD-107458-04E
WARNING
This product uses the Class A Lasers. In a domestic
environment, this product may cause radio interference in
which case the user may be required to take adequate
measures.
WARNING
Do not enter in front of antenna when the transmitter is activating,
because the power density of the microwave or milimeter-wave
becomes high level along antenna beam. For the details, refer to
the Safety Guidance for Microwave Radiation Hazard in NOTICE
(Placing).
- 6 -
NWD-107458-04E SAFETY INFORMATION
CAUTION
CAUTION
While the equipment is powered on, do not connect or
disconnect the power supply plugs, or the DC-DC CONV may
be damaged.
CAUTION
Place ODU within the area protected by lightning rod. To avoid
surge currents caused by lightning circulating in the
equipment earth system, connect the equipment earth system
(frame ground) to ground of the lightning rod at ground level.
CAUTION
In the event that is believed to be an emergency, such as
smokes, burning smells or strange sounds, quit the operation,
and turn the power of IDU off, or it may cause damaging the
equipment or generating an electric shock. In this situation, do
not attempt to fix or repair the equipment.
- 7 -
SAFETY INFORMATION NWD-107458-04E
CAUTION
If getting water leakage, metallic shards, smokes, corrosive
gas and dusts into the equipment, or if birds or animals
approach equipment, the equipment may be damaged.
CAUTION
Do not attempt to overhaul, modify or repair the equipment, or
it may damage the equipment or may result in giving an
electric shock.
- 8 -
NWD-107458-04E SAFETY INFORMATION
NOTICE (PLACING THE EQUIPMENT)
1. Since ODU generates non-ionizing radiation, if the ODU is installed indoors, it may
affect the health, which requires to take the adequate measures.
2. Ensure not to block the vents of the equipment. If blocked, the air within the equipment is
extremely heated up, which may damage the equipment. Follow the set up and usage
rules listed below:
Do not install the equipment on the floor covered with a carpet, floor panel heating,
or on the bare concrete floor.
Do not cover or wrap the equipment with tablecloths, chiffon, rubber or plastic
materials.
Do not mount the equipment in the bookshelves, locker or in a stuffy place.
Do not place anything like books or papers on and against the equipment.
3. The equipment must be installed in the appropriate place. Do not install it sideways or
aslant. If it is not properly installed, it may be damaged due to a rise of inner
temperature.
4. Do not install the equipment in the following locations, or the equipment may be
damaged:
The equipment must be installed and maintained in a clean, and dry place where
the temperature and humidity are stable, and no dew condensation, which should
be within the ranges specified by the manufacturer.
5. For the indoor-type equipment, do not install it where it could be affected by the salt-air,
sandy dust, sulphuric acid gas, etc.
If the equipment needs to be installed in such place, the following must be considered:
(a) Construction of the Equipment Room
The room should be airtight or sheltered by external influences mentioned above.
- 9 -
SAFETY INFORMATION NWD-107458-04E
(b) Environmental Temperature Impact for the Equipment
In the airtight room, the heat generated within the equipment raises the
temperature.
An air conditioner for the industrial use is needed to be installed according to the
on-site condition.
When the air conditioner is installed, do not blow the air directly to the equipment.
If the equipment is placed facing the air from the air conditioner, condensation
may occur depending on the temperature variation.
(c) If installing the equipment in the coastal areas (within 3 km from the seaside),
measures to avoid damages by seawater and salt wind are required, for which
consult NEC.
6. Places for installing the equipment are restricted to the Telecommunication Center or
equivalent.
(a) Use twisted pair cables for the power supply cables to suppress inductive
interference signals.
(b) Use shielded cables for the data transmission cables.
(c) Transmission quality degradation may temporarily occur due to the
electromagnetic disturbances such as lightning or ESD.
7. The ODU shall be installed at the restricted access location
Note #1
by a service personnel.
Not e#1: RESTRICTED ACCESS LOCATION is defined as both the following:
Accessing to the equipment is allowed only by SERVICE PERSONNEL or by
USERS who have enough skills and knowledge of these restrictions and precautions
regarding installing locations.
Accessing must be protected using a TOOL, lock and key, or other means of
security, and is managed by the authority who is responsible for the installed
location.
Frame Ground (FG) should be connected to the station earth point. For details,
refer to the Section I, “INSTALLATION, Frame Grounding.”
- 10 -
NWD-107458-04E SAFETY INFORMATION
Safety Guideline for Using Hazardous Microwave Radiation
The Microwave and Millimetre-wave that iPASOLINK series use are very low-level radiation and have
never been reported to affect the human health. However, advanced countries have started to regulate
things regarding the health hazard, including radiation levels. As for EU countries, it is specified by
EN50385. In order to comply with the regulation, an operator should not work near the parabolic
antenna if transmitter is activating. Especially the area from side to front of the antenna shows higher
radiation level. (See the following illustration and Calculation Example 1.)
On the other hand, in front of the antenna, the power density becomes higher level according to the
antenna beam. Therefore, the user of this system should pay attention whenever to prevent
himself/herself from being radiated. (See the Calculation Example 2 below.)
ODU
- 90 to +90
degrees
ANTENNA
0.1m for Calculation example 1
0.1m for Calculation example 1
100m for Calculation example 2
Hazard Area of Radiation
In addition, the power density and field strength level are calculated by the following formula:
10
×
K
Power density S (mW/cm
2
) =
40
× π ×
R
2
P+G−30
10
Where:
P = Output power of ODU (dBm),
G = Antenna Gain (dBi),
(in consideration of the angle of antenna)
K = Reflection factor =2.56 (given),
R = Distance between Human and Antenna (m)
Calculation Example 1 (90 degree side of antenna)
PASOLINK = 18 GHz/+23 dBm,
Antenna diameter = 0.6 m,
0 degree antenna gain = 39 dBi,
90 degrees side antenna gain = −24 dBi, (90 degrees attenuation = −63 dB),
Distance = 0.1 m
Power density S (mW/cm2) = 0.0016 ≤ 0.01 (European safety guideline)
- 11 -
SAFETY INFORMATION NWD-107458-04E
Calculation Example 2 (0 degree, front side of antenna)
PASOLINK = 7 GHz/+27 dBm,
Antenna diameter = 1.8 m,
0 degree antenna gain = 40 dBi,
Distance = 100 m
Power density S (mW/cm2) = 0.01 => Equal to European safety guideline
- 12 -
NWD-107458-04E SAFETY INFORMATION
FAN Unit
1. If a FAN alarm is detected, immediately replace it with the appropriate FAN Unit. While
the fans are dismounted or are failed to run, the temperature within the equipment keeps
rising, which may degrade the performances.
2. Replace the FAN Unit every three years to guarantee its performance. It is recommended to
store several FAN Units for spares.
- 13 -
SAFETY INFORMATION NWD-107458-04E
FCC Statement
FCC CAUTION: Any changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate this equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the user
is encouraged to try to correct the interference by one or more of the following measures:
—Reorient or relocate the receiving antenna.
—Increase the separation between the equipmentand receiver.
—Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
—Consult the dealer or an experienced radio/TV technician for help.