Tait TEL0049 One way paging transmitters T857-26-1010 & T857-26 User Manual 8c500 a3 bk

Tait Limited One way paging transmitters T857-26-1010 & T857-26 8c500 a3 bk

Contents

Installation instructions

M850-00T856/857 InstallationF2.1Copyright TEL 31/09/982 T856/857 Installation2.1 Rack MountingThe T856 transmitter and T857 exciter are designed for use in a standard 483mm rackframe using a Tait T800 Series II guide. The guide is securely mounted to the rack framewith front and rear retaining screws, and the T856/857 is secured into the guide withtwo front panel mounting screws. Figure 2.1 shows a standard, double module guidewhich can also be fitted with an optional backplane PCB to locate and mate the rearD-range connector(s). For more information on available guide kits, refer to the T800Ancillary Equipment Service Manual or your nearest Tait Dealer or Customer ServiceOrganisation. A rear mounted N-type connector is used for RF output on the T856/857, while all DC,audio and control connections are via the rear mounted D-range connector, D-range 1(PL100). An additional rear D-range connector (T800-03-0000) can be fitted whenremote multichannel operation, or additional control or low frequency lines arerequired (refer to Figure 2.2).2.2 Rack WiringThe D-range input and output connections are shown in Figure 2.3 and Figure 2.4.Ensure that the cables are not subjected to any stresses due to tight bends or incorrectlengths.Make sure the RF coax cable to the N-type connector is free from sharp bends or twists.If access to the rear of the rack frame is restricted, the cable should be long enough toallow the chassis to be fully withdrawn from the guide.Figure 2.3 T856/857 D-Range 1 Wiring - Rear ViewFigure 2.4 T856/857 D-Range 2 Wiring - Rear View(standard T800-03-0000 kit)Note:Figure 2.4 above shows the standard pin allocations for the T800-03-0000auxiliary D-range kit. A T800-03 auxiliary D-range kit is also available forspecial applications requiring custom internal wiring.Front PanelMounting HolesRack Mounting HolesRack Mounting HolesRack Mounting HolesSlots For D-RangeConnectorsRack Mounting HolesAperture For RFConnectorsOptional Backplane PCBMounts On Rear Of GuideN-Type ConnectorD-Range Plug(D-Range 1)Space For OptionalD-Range Plug(D-Range 2)Front Panel Mounting HoleFigure 2.2 T856/857 Chassis ConnectorsFigure 2.1 T800-41-0002 Double Guide Kit123456789101112131415External CTCSS input:1kHz deviation @150Hz (500mV rms)To key transmitter:high impedance<0.7V = keyHigh isolationkeying option:6 to 50V DC To key PA, opencollectorCan be configured asAudio 1 by internallink resistors if requiredShort together fornormal operationSensitivity: -30dBmExternal/auxiliaryaudio processingPower supply, -ve earth10.8 to 16V DCLine I/P1CTCSSSerial ComAudio 2Tx EnableLine I/P4Line I/P3Line I/P2Opto Key +Opto Key - +13.8VGndTx KeyCan be configured as Audio 1 by internal link resistors if required.Refer to Part I.Open drain type;capable of sinking2.25mA via 2k2Ω;V max. = 5Vds123456789101112131415CH_SLCT 0CH_SLCT 1CH_SLCT 2CH_SLCT 3CH_SLCT 4CH_SLCT 5CH_SLCT 6CH_SLCT 7GNDTX RELAY DRVCTCSS DISABLESERIAL COMAUX-OUT 0AUX-OUT 1AUX-OUT 2
F2.2T856/857 InstallationM850-0029/02/00 Copyright TEL2.3 Power SupplyIf a power supply other than an appropriate Tait model is used, ensure that it is capableof providing enough current to drive the T800 system and is also free from excessiveripple or noise.The system should be protected by the use of appropriately rated fuses in the powersupply.Note:It is particularly important when the prime power source is a battery thatfuses be employed in all supply lines.2.4 Reverse Polarity & Overvoltage ProtectionA crowbar diode is fitted to all T856 transmitters and T857 exciters for protectionagainst connection to a power supply of incorrect polarity. It also provides overvoltageprotection from voltage transients caused by lightning strikes.Note:A fuse must be fitted in the power supply line for the diode to provide effec-tive protection.
M850-00T858/859 InstallationF3.1Copyright TEL 31/01/993 T858/859 Installation3.1 Rack MountingCaution:If you require continuous operation of the T858, leave the rack moduleposition immediately adjacent to the finned heatsink empty. Thereshould be adequate airflow over the fins at all times. Extra airflow canbe provided by fitting an auxiliary fan kit such as the T800-19-0010(refer to the T800 Ancillary Equipment Service Manual or your nearestTait Dealer or Customer Service Organisation for more details).The T858 and T859 PAs are designedfor use in a standard 483mm rack frameusing Tait T800 Series II guide rails.The guide rails are securely mounted tothe rack frame with front and rearretaining screws, and the PA is securedinto the guide with two (T858) or four(T859) front panel mounting screws.Figure 3.1 shows the standard, doublewidth guide designed for use with theT859, while Figure 3.3 shows how thePA can be latched in the extended posi-tion. For more information on availa-ble guide kits, refer to the T800Ancillary Equipment Service Manualor your nearest Tait Dealer or CustomerService Organisation. Figure 3.1 T800-45-0001 PA Guide KitThe PA rear panel has three connectors: a BNC for RF input (from an adjacent T857exciter), an N-type for RF output and a D-range for all DC, audio and control connec-tions (refer to Figure 3.2).Figure 3.2 T858/859 Chassis ConnectorsFigure 3.3 T858/859 PA In Latched PositionNote:You will need appropriate extension leads if you wish to carry out anyadjustment procedures with the PA withdrawn from the rack in the latchedposition. Alternatively, disconnect and withdraw the PA and reconnect itbehind the rack.3.2 Rack WiringThe D-range input and output connections are shown in Figure 3.4. Ensure that thecables are not subjected to any stresses due to tight bends or incorrect lengths.Make sure the RF coax cables to the N-type and BNC connectors are free from sharpbends or twists. If access to the rear of the rack frame is restricted, the cables should belong enough to allow the chassis to be fully withdrawn from the guide.Figure 3.4 T858/859 D-Range Wiring - Rear ViewFront PanelMounting HolesRack MountingHolesRack MountingHolesRack Mounting HolesN-Type ConnectorBNC ConnectorD-Range ConnectorN-Type ConnectorBNC ConnectorD-Range ConnectorT858T859RF OutputRF InputD-rangeTop RailBottom Rail123456789101112131415Normally low, floaton alarm conditions.500mA sink capability.Pull low to enablealarm outputsPower supply, -ve earthWill drive a coil meter10.8 to 16V DCReverse Power MeteringForward Power MeteringReverse Power AlarmForward Power AlarmTx Key +13.8VGnd
F3.2T858/859 InstallationM850-0029/02/00 Copyright TEL3.3 Power SupplyIf a power supply other than an appropriate Tait model is used, ensure that it is capableof providing enough current to drive the T800 system and is also free from excessiveripple or noise.The system should be protected by the use of appropriately rated fuses in the powersupply.Note:It is particularly important when the prime power source is a battery thatfuses be employed in all supply lines.Caution:Connect the power supply directly to the PA, and not via connectorblocks. This will avoid overheating of connector blocks that are not ofthe correct current rating.3.4 Reverse Polarity & Overvoltage ProtectionA crowbar diode is fitted to all T858/859 PAs for protection against connection to apower supply of incorrect polarity. It also provides overvoltage protection from voltagetransients caused by lightning strikes.Note:A fuse must be fitted in the power supply line for the diode to provide effec-tive protection.

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