Mobility, Intelligent Traffic Systems
Sopers Lane, Poole, Dorset, BH17 7ER
Copyright © Siemens plc 2020. All Rights Reserved. Mobility is a division of Siemens Plc
The 48V DC Lamp supply, 48V DC Regulatory sign supply and 24V DC
Loop Detector Supplies are all negative with respect to ground i.e. the
positive side of each of these supplies is grounded.
Note 1: When measuring any of the DC supplies, a normal multimeter set
to DC Volts will NOT show the true rms voltage of the unsmoothed DC
waveform. The multimeter will indicate the voltage shown in the
“Measures as” column in table above.
SK1 – Reg Sign
Supply
PL2 – Relay
Control
PL3 – Reg Sign
Monitor
PL6 – Reserved
For future Use
PL4 – LSLS1
PL6 – LSLS2
PL7 – LSLS3
PL1 – Relay
Control
SK2 – Detector
Supply and
Solar Cell
TP1-TP4
HFF (Fail Flash)
Enable links for
LSLS1
PL5 –
Transformer
Low Power
SK3 – Transformer
High Power and
Earth
Figure 12 – HPU Card Layout
TP1-TP4 Link
A single link must be installed between TP1 (common) and TP2, TP3 or TP4
depending on how the controller needs to provide the lamp supply for the particular
configuration. Figure 13 shows the three possible link positions for UK, Non-UK with
or without HFF (No link shown for clarity).
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