Specifications

Power Distribution Modules
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31007715 6/2008
Source Power The STB PDT 3100 PDM requires source power from at least one independent,
SELV-rated 19.2 ... 30 VDC power supply.
Sensor power and actuator power are isolated from one another on the island. You
may provide source power to these two buses via a single power supply or by two
separate power supplies.
Refer to the Advantys STB System Planning and Installation Guide (890 USE 171)
for a detailed discussion of external power supply selection considerations.
Sample
Wiring Diagrams
This example shows the field power connections to both the sensor bus and the
actuator bus coming from a single 24 VDC SELV power supply.
1 +24 VDC sensor bus power
2 -24 VDC sensor power return
3 +24 VDC actuator bus power
4 -24 VDC actuator power return
The diagram above shows a protection relay, which you may optionally place on the
+24 VDC power wire to the actuator bus connector. A protection relay enables you
to disable the output devices receiving power from the actuator bus while you test
the input devices that receive power from the sensor bus. For a detailed discussion
and some recommendations, refer to the Advantys STB System Planning and
Installation Guide (890 USE 171).
STB PDT 3100
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