Siemens ST950 Plus+ User Manual page 81

ST950 Plus+ User Manual
Figure 44 below. The signal and power cable will normally be derived from the Pole Top Board
(reference section 4.1 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.
PDU and Wait Indicator Earthing Requirements
The PDU and Wait Indicator require a separate Earth wire to be fed from the Pole Top Earth Terminal or
other Pole Earth points (sometimes derived from the CET gland on the armoured cable termination) and
connected to the earth terminal on the PDU or Wait Indicator equipment.
ST950 Plus+ User Manual Page 81 of 176
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