INTERFACER-LHR4  LO-HI input relay boards


The RELAY-X4PSL board is designed to turn four SPDT relays on and off as a direct response to low voltage inputs.


If used properly, it will eliminate the need for expensive units, which would otherwise be needed to carry out the same tasks.


RELAY-X4PSL is easy to install, setup and operate. If you want to do professional high voltage switching related functions, RELAY-X4PSL offers the features you need. Mounted easily via seventh 0.125" mounting holes.


The RELAY-X4PSL boar power via 110V or 220V AC. It come standard with 12V relays. 5V and 24V relay are also available.


This board is ideally for high voltage or current signal switching. Also been use to switch indication lamp status signals.




RELAY-X4PSL Features


  • Built-in relay on LED indicator for each relay.

  • Power source via self isolation power transformer and Filter DC power source.

  • +X un auxiliary DC voltage for driving external board or sensor.


  • PCB material                            FR4

  • Relay switch min. rating            110V/12A other values are available

  • Max power consumption            1W

  • Storage temperature                40 - 70   [F]

  • Operating temperature              32 - 140 [F] (0 to 60C) @ 95% RH

  • Low board DC voltage               12 [VDC]

  • Power source                          Isolate 110V or 220V down to 12V DC via LM317 regulator

  • Relay on  indicator                   LED Green or Red

  • Wires Connections                   Via terminal-block

  • Manufactured                          100% in USA



* Prices, P#, SKU# and colors are subject to change without notice. 





RELAY-X4PSL Self Power Quad Relay board (5V relays)



RELAY-X4PSL Self Power Quad Relay board (12V relays)



RELAY-X4PSL Self Power Quad Relay board (24V relays)