Specifications

Power Distribution Modules
376
31007715 6/2008
STB PDT 3100 Field Power Over-current Protection
Fuse
Requirements
Input modules on the sensor bus and output modules on the actuator bus are
protected by fuses in the STB PDT 3100 PDM. The sensor bus is protected by a 5 A
fuse and the actuator bus is protected by an 10 A fuse. These fuses are accessible
and replaceable via two side panels on the PDM.
Recommended
Fuses
z Overcurrent protection for the input modules on the sensor bus needs to be
provided by a 5 A time-lag fuse such as the Wickmann 1951500000.
z Overcurrent protection for the output modules on the actuator bus needs to be
provided by a 10 A time-lag fuse such as the Wickmann 1952100000.
Performance
Considerations
The maximum combined module current - the sum of actuator current and sensor
current - depends upon the island’s ambient temperature, as displayed in the
following diagram:
Maximum Current (A) to Temperature (°C)
For example:
z At 60 °C, total maximum combined module current is 8 A.
z At 45 °C, total maximum combined module current is 10 A.
z At 30 °C, total maximum combined module current is 12 A.
At any temperature, the maximum actuator current is 8 A, and the maximum sensor
current is 4 A.
Current (A)
0
30 45 60
12
10
8
15
Temperature (
°
C)
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