RS232 Relay

RS232 Relay at a Glance...

  • 1 Relay Installed on a Circuit Board
  • RS232 Interface with Choice of Connector
      - Onboard DB9 Connector
      - Screw Terminal Connector
      - Off the Board DB9 Connector
      - Connect to Any Existing COM Port
  • Pro Versions
      - Limited Command Set   - Not Expandable
  • ProXR Lite Versions
      - Industry Leading Command Set
      - Not Expandable
  • Connects to Third Party Devices
      - Creston, AMX & More!

Selecting The RS-232 Relay Interface

RS232 RelayBy selecting the RS232 interface you will be sending commands to the board through either a DB9 or direct wire interface.  Boards on this page are equipped with a ZRS communications module that adds RS-232 communications to the board.  At checkout you will have three modules to choose from with either a DB9 or direct (3-wire) connection.  A command consists of a few bytes of data in numerical format usually between 2 and 6 bytes.  Once the command has been received, the controller processes the command and the relay activates.

Selecting an RS-232 Relay

Below you will find the 1-channel RS232 Relay that are available.  The difference being the amperage of the relays installed and the type of relay.  Choose the controller that fits the amperage you are switching.  You will find SPDT relays in the 5, 10 and 20 amp versions and an SPST version in 30 amp.  For more information on selecting the correct relay for your application see Choosing a Proper Amperage.

Selecting an RS-232 Relay Series

The 1-Channel RS232 Relay boards are available in Pro and ProXR Lite versions.  The Pro versions offer a no-frills design that's fully EC3 compliant and the Pro Firmware installed - a smaller command set than our ProXR Lite models.  ProXR Lite versions have the ProXR firmware installed and accept the full ProXR command set, the industry leading command set for controlling relays.  Both Pro and ProXR Lite versions are non-expandable.  When you find your controller click on the Full Description link to view full specs, watch setup videos, download software and purchase.