I have a device with only 2 Wires. The topside unit for the device I'm trying to replace provides +24V and 0 to these wires. The device manipulates the +24V and creates a +2.5V -2.5V sinewave that rides on top of the +24V and returns to the topside unit.
My current issue is that if I power the device with a regular +24V power supply, it won't return a sine wave. Would there be any reason a device could talk back on one power source but not the other? Maybe I'm missing something riding AC over DC 101?
The topside unit has a +12V and -12V power supply inside...but externally I only see +24V and 0 when I meter it.
Ideas, suggestions?
My current issue is that if I power the device with a regular +24V power supply, it won't return a sine wave. Would there be any reason a device could talk back on one power source but not the other? Maybe I'm missing something riding AC over DC 101?
The topside unit has a +12V and -12V power supply inside...but externally I only see +24V and 0 when I meter it.
Ideas, suggestions?