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PMDX-104 4 channel low power SSR output buffer

Model PMDX-104

4-Channel Relay Output Board


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The PMDX-104 is a 4-channel, relay output board. 

  • Electromechanical relay outputs support AC or DC loads up to 5 amperes maximum
  • Outputs can provide isolated "switch closures" to control VFD's (variable frequency drives) or drive 24 volt DC inputs for PLC's (programmable logic controllers)
  • Outputs protected from spikes when turning off inductive loads
  • Clamp style screw terminal strips for inputs and outputs allow use with any breakout board
  • LED indicators on each channel
  • Logic level control inputs (5 volt TTL or CMOS)
  • Requires 5 volts power, can be powered directly by a PMDX-122, PMDX-126, and by PMDX-SmartBOB boards.


Breakout board feature comparison table

Download the full manual in PDF format here (revision 1.0, 309 KB).

The PMDX-104 is priced at $48.00

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For accessory cables CLICK HERE

For accessory switches and sensors CLICK HERE