Specifications

Theory of Operation
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In this case, the STB PDT 3100 PDM is placed directly to the right of the last
115 VAC module. It terminates the sensor and actuator buses for the 115 VAC I/O
voltage group and initiates new sensor and actuator buses for the 24 VDC modules:
1 115 VAC sensor power signal to the PDM
2 115 VAC actuator power signal to the PDM
3 24 VDC sensor power signal to the PDM
4 24 VDC actuator power signal to the PDM
Each standard PDM contains a pair of time-lag fuses to protect the I/O modules in
the segment. A 10 A fuse protects the output modules on the actuator bus, and a
5 A fuse protects the input modules on the sensor bus. These fuses are user-
replaceable.
Note: When you plan the layout of an island segment that contains a mixture of AC
and DC modules, we recommend that you place the AC voltage group(s) to the left
of the DC voltage group(s) in a segment.
115 V
DAI
PDM
DAI DAI
DAO
DAO DAO
NIM
DDI DDO
24 V
PDM
1
2
3
4
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