Siemens EH.75M.11. Especificaciones descargar pdf (Pagina 287)

T400 Controller Facilities Manual

667/EB/20200/000 Page 25-16 Issue 9

25.3 RLM GENERAL DESCRIPTION

25.3.1 Background Information

The RLM facility is required at part-time signals and at junctions which are fitted with

pedestrian audible or tactile devices. The vehicle red lamps are monitored and when

lamp failures are detected, the operation of the controller is modified to ensure that

unsafe signal conditions do not occur.

The RLM function is provided by the T400 firmware operating in conjunction with a

RLM unit. The RLM unit hardware comprises a T400 ancillary processor card

(666/1/02239/001), together with current monitoring transformers (toroids) and a

voltage monitoring transformer. The ancillary processor card resides in the T400

module rack and communicates with the T400 main processor card via the extended

system bus ribbon cable. The T400 can also operate with a free-standing RLM unit,

giving reduced facilities.

This RLM function, which applies to intersection controllers, should not be confused

with Pelican Red Lamp Monitoring, which is specific to Pelican crossings (i.e.

MCE0125, MCE0145 and Puffin) and is implemented in hardware on the T400 2-

phase drive card.

25.3.2 Overview

For earlier installations, a separate mains powered RLM unit may be employed. In this

case, the RLM facilities available are reduced. The combinations of facilities and

equipment which are available are summarised in the table below.

Equipment RLM Operation RLM Signals Available

free-standing RLM unit original RLM all red. RLF1, RLF2 & RLF3.

free-standing RLM unit enhanced RLM phase

delays and inhibits on

first RLM group only.

RLF1 & RLF2.

Caution:

RLF3 is not supported.

integral RLM unit original RLM all red. RLF1 & RLF2 for first

RLM group only.

RLF3 is not required.

integral RLM unit enhanced RLM phase

delays and inhibits.

RLF1 & RLF2 for up to

8 RLM groups.

RLF3 is not required.

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Siemens EH.75M.11. Especificaciones Pagina 287