Charlemagne
Member
Good Morning! I am new here and have limited experience in working with PLCS, and desperation has brought me here with a problem, hoping some of you might be of assistance, although this might be more on a wiring side of things than a programming side.
I am working with a 1734-AENTR B Point I/O block, with five 1734-IB8 24VDC sinking input modules, two 1734-OB8E 24VDC sourcing output modules, and two 1734-IE2V analog voltage input modules. I have a variety of 24v sensors connected to the input modules and analog modules. Both the Point I/O and the field sensors / devices are powered from the same 24V machine circuit.
I have noticed that there is what seems to be a substantial amount of voltage present on my output terminals when the whole 1734-AENTR is powered on, about 9v. I suspect that this is leakage from the solid state output modules, but it is worth noting. When I disconnect the main supply terminals providing the 24v supply to the 1734-AENTR, all terminals on the chassis become energized with about 10v, which turns on a siren and a few lights connected to the outputs. This does not seem to be correct, any ideas on what might be causing this? It is worth noting that I have 7 more 1734-AENTRs on the same machine set up in a similar way that have the same problem when I disconnect the supply terminals on the 1734-AENTR. If I had to take a very uneducated guess, I suspect that some of the field wires connected to the input modules that are stil high with 24V are somehow energizing the whole chassis?
I appreciate any input or assistance. I can provide more details if needed.
I am working with a 1734-AENTR B Point I/O block, with five 1734-IB8 24VDC sinking input modules, two 1734-OB8E 24VDC sourcing output modules, and two 1734-IE2V analog voltage input modules. I have a variety of 24v sensors connected to the input modules and analog modules. Both the Point I/O and the field sensors / devices are powered from the same 24V machine circuit.
I have noticed that there is what seems to be a substantial amount of voltage present on my output terminals when the whole 1734-AENTR is powered on, about 9v. I suspect that this is leakage from the solid state output modules, but it is worth noting. When I disconnect the main supply terminals providing the 24v supply to the 1734-AENTR, all terminals on the chassis become energized with about 10v, which turns on a siren and a few lights connected to the outputs. This does not seem to be correct, any ideas on what might be causing this? It is worth noting that I have 7 more 1734-AENTRs on the same machine set up in a similar way that have the same problem when I disconnect the supply terminals on the 1734-AENTR. If I had to take a very uneducated guess, I suspect that some of the field wires connected to the input modules that are stil high with 24V are somehow energizing the whole chassis?
I appreciate any input or assistance. I can provide more details if needed.