Siemens EH.75M.11. Especificaciones descargar pdf (Pagina 197)

T400 Controller Facilities Manual

667/EB/20200/000 Page 19-4 Issue 9

19.2 RED LAMP MONITORING

This facility monitors the state of lamps at an intersection as in standard lamp

monitoring. There are 3 outputs from RLMU that affect the controller operation with

another 2 outputs which can be connected directly to the OTU.

RLMU

Output Cause Of Output

Controller

Input Ref.

MCK 1061

Reference

0 Activated if a red lamp fails on any 3 aspect

vehicle phase

LMU1 Indication 1

1 Activated if a second red lamp fails on any 3

aspect vehicle phase where a red lamp has

previously failed

LMU2 Indication 2

2 Activated if a second red lamp failure is

pending on any 3 aspect vehicle phase

where a red lamp has already failed

LMU3 Indication 3

3 Active if any one lamp (red, amber, green,

reg. sign, or wait indicator) on an input

being monitored fails

- Connect directly to

OTU if required

4 Active if any green lamp on any 3 aspect

vehicle phase has failed

- Connect directly to

OTU if required

(Fault Outputs Set During Lamps Off - Fault Outputs 3 and 4)

Red Lamp Monitoring is used on part-time signals or intersections with pedestrian

phases with audible or tactile indicators and pedestrian only stage.

The Red Lamp Monitor outputs 0, 1 and 2 are connected into the T400 controller with

outputs 3 and 4 connected directly into the OTU.

Each of the outputs from the LMU can only be connected to one input on the

controller so if a UTC reply bit is required when either fault output 0, 1 or 2 goes

active, it must be achieved via conditioning.

The 3 controller inputs (LMU1, LMU2 and LMU3) have relay contacts open when

active. In the event of LMU fail or incorrect connections the controllers sees all 3

inputs as being active. This causes controller to respond accordingly.

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