The B836–016 12—250 Vdc isolated output module accepts up to 16 signals from a 984 PLC and converts them to independent outputs. The module’s essential function is to switch one or more field circuits off

At any given time, one or more output channel’s signals may be in a true high configuration while one or more of the remaining output channel’s signals are in a true low configuration. The output signals are capable or driving displays, relays, lamps, or any load connected to a 12—250 Vdc user supplied voltage source. Finally, the module is fused against overload currents and protected from accidental polarity reversal.

Since all of the16 circuits are the same, describing one circuit’s function describes the module’s function.

Data commands from the controller are shipped via OURBUS to the OBS communications chip in the B836–016 module via Modicon’s standard data interface. The OBS chip directs the signal to the addressed channel which in turn feeds the transistor driver, couples through the ISOGATE and turns the field effect transistor (FET) switch on. Since the circuit is a completely floating arrangement, it is equally useful in a true high (sourcing) or true low (sinking) configuration.