R120HPR1 relay board — manual and serial command set

Hardware
1

'm Jake Scott, founder of Embedded Payment Solutions in Australia. We fit contactless payment systems to unattended machines, and we have come across a number of your one channel high power relay boards already installed at a customer’s site in Melbourne.

The board is marked R120HPR1 Rev A. It has a 12V DC relay, a three position screw terminal for the contacts, and a DB9 connector. We are taking over the control side of that installation and would like to drive the boards from our own payment terminal over serial.

Could you please send through:

  • The manual or datasheet for this board.
  • The serial command set to open and close the relay, along with the default baud rate and serial settings.
  • The DB9 pinout, in particular which pin is the board’s receive line, and confirmation that the input expects true RS232 levels.

I would also like to order a few spares, so if you could point me to the current equivalent part I would appreciate it.

2

Hi Jake,

The command set for that controller can be found here:

The data sheet for the relay can be found here:

The DB9 pinout is a standard configuration. Connect using a serial extension cable, not a null modem cable.

Please let us know if you have any other questions.

Thank you,
Travis Elliott