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T400 Controller Facilities Manual

667/EB/20200/000 Page 25-9 Issue 9

25.2.6 Connectors and Cables

25.2.6(a) Extended System Bus Ribbon Cable

Connect the T400 extended system bus cable to Plug PLA on the back of the Ancillary

Processor PCB.

NOTE: Do not connect/disconnect the cable whilst the controller power is switched

on.

25.2.6(b) Telephone Cable with 6-way Plug

If the installation uses the TC12 outstation facility then the OTU comes fitted with a

telephone cable terminated in a 6 way telecom plug. Connect the telephone plug to the

telephone socket in the traffic control equipment.

NOTE: The cable should never be disconnected from the PCB Socket SK1,

whilst the other end is connected to the telephone network (via the network

termination unit). In order to prevent the cable being disconnected from the

PCB by accident, the PCB cover fits around the end of the plug on the cable, in

order to retain it.

25.2.6(c) Lamp Monitor Unit Connections

If the installation uses the lamp monitoring facility then Current and Voltage

monitoring transformers are connected to PLB on the Ancillary Processor PCB via a

64-way connector housing (part number 508/4/26138/008). The current and voltage

monitor transformers have 2 wires each, terminated in crimps which push in to the

connector housing.

Note - only 60 positions are used on the 64 way housing. Positions 1,2,63 and 64 are

unused as they do not line up with any of the 60 pins on the plug PLB.

Figure 25.2 shows the pin out of PLB.

LMU input 1+ and LMU input 1- (PLB pins 1 and 2), correspond to positions 3 and 4

respectively on the 64 way housing and so on.

1 2 ... 275 276 277 278 279 280 281 282 283 284 285 ... 307 308

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