Ed B.

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  1. 90-30 Rack Modules repeated loss/gain

    Ed B. posted a topic in GE

    Hi, With no hardware changes and no work on the system, rack 1 (2nd of a 3 rack system) started loss/regain of all modules randomly.  First I put in a new power supply (321) and that did not fix the problem. Just looking for any similar history/advise.  Next, I plan to remove most common faulted modules for a while and see what happens, remove/clean/reseat rack connectors, try inline current measurements, etc.  Modules on rack are: (3) INPUT 24VDC NEG LOGIC; (3) INPUT 24VDC POS/NEG LOGIC; (1) INPUT SIMULATOR and (1) ETHERNET module.  System is almost 30 years old and all modules are original except for Ethernet, which is about 20 yrs. old. Thanks...  E