Issue
All or a group of Analog Inputs on my Controller (DCU 7700) are reading high (flooding), in alarm and / or displayed as "OLD'.
Product Line
TAC INET
Environment
- I/NET
- All model series DCU 77xx
Cause
The inputs on a DCU 7700 are 1-5 Volt DC inputs.
If the voltage of an input goes above 5 Volts DC the voltage will flood across the other inputs and they will all go out of range or OLD.
Resolution
To diagnose the problem sensor perform the following: Measure all inputs (Between terminal 9 and the...