This module has 16 open collector (NPN) digital outputs. The outputs may be used to drive lamps or external relays when more drive capability is required. The outputs are isolated from the logic and they share a common negative terminal.

Each output can be individually switched on or off, or all outputs can be set up at the same time by writing a single number to the output register which represents the status of all outputs.

The module may be used as either a slave or master on the Modbus network. When used with a PC or PLC the module will be configured as a slave. When used with a PM16DI module in a point-to-point configuration, the DIP switch 9 must be turned on to set the module up as a master. In this mode the PM16DO module will automatically read the information from the PM16DI module and write the input status to the outputs.

An output watchdog timer can be configured to switch off all the outputs if there has been no communications with the module for up to 255 seconds. A value of 0 seconds will disable this timer and the outputs will remain in the last programmed state.


Digital Outputs 16
Type NPN Open collector
Max Load Current 100mA per channel
Max load Voltage 36Vdc
Vce (on) Voltage 1.1V (max)
Watch dog output timer Disable or 1-255 sec adjustable
Isolation (Field & Logic) 1500VAC RMS
Status Indication LED for each channel
Power supply (Field) +12Vdc to +24Vdc




Order Code

  • PM16DO PROMUX 16 Digital Output Module

PM16DO - PROMUX 16 Digital Output Module

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