PM12RO - 12 Relay Output Module

The PM12RO module has 12 relay outputs. These modules may be used when a higher drive capability is required, or when isolation between outputs are required.

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 PM12RO module will automatically read the information from the PM16DI module and write the input status to the outputs.

When used as a slave module, the outputs are written to by the Modbus master device such as a PC or PLC. 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.

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.

PM12RO - 12 Relay Output Module

Digital Outputs



Relay – 1 x Form C

Max Load Current

0.5Aac / 1Adc.

Max load Voltage


Isolation (Field & Logic)


Watch dog output timer

Disable or 1-255 sec adjustable

Status Indication

LED for each channel

Power supply (Logic)


Order Codes

  • PM12RO - PROMUX 12 Relay Output Module

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PM12RO - 12 Relay Output Module

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Procon Electronics