ST950S Plus+ Installation and Commissioning Manual
Table 33. RAG Node LED Indicators (continued)
LED
Illumination
Function
Off
Normal and correct operation
4.3.7. Parts
Plus+ RAG Node PCB Assembly 667/1/53111/001
4.4. Pedestrian Demand Unit (PDU)
Important:
Instructions for mounting, replacing Helios signal heads, pedestrian signalling and demand
equipment and mounting items such as the Solar Cell can be found in the Helios Handbook
667/HB/30000/000.
Figure 44. Pedestrian Demand Unit (PDU)
Connection to the PDU is via the standard housing aperture on the rear – see below. The signal and
power cable will normally be derived from the Pole Top Board (reference section
for details). This is the case when the PDU is used in combination with Farside pedestrian
signalling configuration or with a localised Nearside signalling unit. The cable will be the six-way
dropper cable with all ways being used.
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