Input/Output Modules 51
Chapter 3 System Description
Field Power
Feature Specification
Nominal field voltage 24 V DC
Operational voltage range 24 V DC –15% or +20% + 5% AC ripple
(19.2 to 30 V DC)
1
1. For the PI Module, the voltage ranges are configurable in TriStation 1131.
Power See module specifications
Absolute maximum input voltage 33 V DC
Absolute maximum reverse input
voltage
–0.6 V DC
Input power interruption time
from nominal
Not applicable
Power interruption interval Not applicable
Reverse current isolation 500 µA maximum
Functional- to-protective-earth
isolation
500 V DC, minimum
Functional-to-functional-earth
(logic) isolation
800 V DC, minimum
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