Siemens EH.75M.11. Especificaciones descargar pdf (Pagina 31)

T400 Controller Facilities Manual

667/EB/20200/000 Page 3-2 Issue 9

The red/amber period is normally 2 seconds and the amber period is normally 3

seconds.

Alternative signal sequences, e.g. RED-GREEN-AMBER-RED, may be obtained if

required.

In the example in Figure 21.2 and Figure 21.3, phases A,B,E and F are traffic phases.

3.2.2 Pedestrian Phase

A pedestrian phase controls pedestrian movements via a 2-aspect signal comprising red

and green man plus a WAIT indicator.

The standard signal sequence is as follows:

RED MAN - at no ROW

GREEN MAN - at ROW

BLACKOUT - changing to no ROW

Alternative signal sequences, e.g. RED MAN - GREEN MAN - AMBER MAN, or

RED MAN - GREEN MAN - FLASHING GREEN MAN, or others may be obtained

if required.

The WAIT indicator uses the amber aspect drive (if not used for anything else, see

section 3.2.53.2.5(b)) and is illuminated when a demand is inserted for the pedestrian

phase from a pedestrian push-button unit. It will remain illuminated until the pedestrian

phase gains ROW when it will be extinguished. During the green man period demands

for the pedestrian phase are disregarded but they will be accepted during the blackout

period and thus illuminate the WAIT indicator.

A pedestrian phase is not extendible. However, if it appears in the same stage as a

traffic or green arrow phase and they are extended, the pedestrian phase will be held at

green.

In the example in Figure 21.2 and Figure 21.3, phase G is a pedestrian phase.

3.2.2(a) MCE0141 Audible Indication (Low Voltage)

It is possible to have audible indication when a pedestrian phase is at green, if required.

This may be sounded for the entire period of green or just for a minimum period.

The audible units fit into the pedestrian push-button units. Up to two may be fitted to

give an alternative of loud for daytime use and soft for night time, switched by the

master time clock.

For equipment required see section 18.

Note: It is a requirement of the Department of Transport that the audible indication

facility must be accompanied by a Red Lamp Monitoring facility. (See sub-section

19.2).

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Siemens EH.75M.11. Especificaciones Pagina 31