Spectrum Controls 1771sc-IFE32 - Manual (Page 43)

Chapter 6: Troubleshooting Your Input Module 33
Testing for Input
Channel Functionality
To test the functionality of an input channel:
1. Remove the input wiring from the field wiring arm.
ATTENTION: Remove power from the 1771 I/O chassis backplane and field wiring
arm before removing or installing input wiring.
• Failure to remove power from the backplane or wiring arm could cause module
damage, degradation of performance, or injury.
• Failure to remove power from the backplane could cause injury or equipment
damage due to possible unexpected operation.
2. Connect a battery (or other voltage source) across the input terminals. When the
4-20mA range is selected, the voltage source must not exceed 1-5V.
ATTENTION: The voltage source must be within the selected voltage range. If the
source voltage is greater than the selected voltage range of the input, module
damage will result.
3. Monitor the input data table for predictable values. (values relative to the input
source voltage).
Chapter Summary
In this chapter you learned how to interpret the indicator lights, and troubleshoot
your input module.
!