Russ
Lifetime Supporting Member
I have two output cards sitting next to each other in a rack:
1746-OW16
1746-OW16 (Octal)
output 13 in the first card triggers a solenoid. When output 15 (17 octal) on the 2nd card goes high, the output on the first card drops to zero volts.
When output 15 is low, output 13 works fairly well. The voltage looks normal (120VAC) most of the time, but sometimes still drops to 0.4VAC; however, when output 15 goes high, output 13 drops within a few cycles.
I found a spare output, and used that, but I'm not sure if I should just replace the card, or if there may be some underlying issue that I'm not seeing. It may also be a red herring,
1746-OW16
1746-OW16 (Octal)
output 13 in the first card triggers a solenoid. When output 15 (17 octal) on the 2nd card goes high, the output on the first card drops to zero volts.
When output 15 is low, output 13 works fairly well. The voltage looks normal (120VAC) most of the time, but sometimes still drops to 0.4VAC; however, when output 15 goes high, output 13 drops within a few cycles.
I found a spare output, and used that, but I'm not sure if I should just replace the card, or if there may be some underlying issue that I'm not seeing. It may also be a red herring,