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RS232 Relay - 2 Channel

RS232 Relay Control

RS232 Relay

RS232 Relay All The Features You Need...

  • 2 Relays Installed on Circuit Board
  • Solder on connections on select boards
  • Mounts as a Virtual COM Port on Computer
  • Base Station Software gets you up an running fast
  • Pro Versions
      - Limited Command Set
      - Not Expandable
  • ProXR Lite Versions
      - Full ProXR Command Set
      - Not Expandable
  • ProXR Versions
      - Full ProXR Command Set
      - Expandable to 256 Relays
  • Program in almost any language


RS232 Relay
RS232 Relay Controller Board

Our RS-232 Relays make it easier than ever to add computer controlled switching to your most demanding applications.  We offer a large selection of 2 Channel RS232 Relays for applications ranging from low power signal switching to high voltage, high current applications.  If your looking for a four channel relay controller we have a configuration to fit every need.  RS232 Relays offer excellent communication, speed, and reliability with minimal integration time.  RS232 Relay supports any available COM port at any standard baud rate with a maximum supported baud rate of 230.4K Baud.

RS232 Relay Options
USB Relays are available with SPDT 5, 10 and 20 amp, SPST 30 amp and DPDT 1, 3 & 5 amp relays installed.  In Pro, ProXR and ProXR Lite Versions.


Simple Reliable RS232 Relay Control
Control these RS232 Relays with a DB9 or direct wire connection.
The controller mounts as a virtual COM port for easy programming
Program in Almost Any Language!

Selecting The RS-232 Interface

RS232 Relay ZRSB ModuleBy 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 Board

Below you will find the 2-channel RS232 Relay control 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 2-Channel boards are available in Pro, ProXR Lite and ProXR 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 full ProXR and ProXR Lite models.  ProXR and ProXR Lite versions have the ProXR firmware installed and accept the full ProXR command set, the industry leading command set for controlling relays.  The ProXR Lite version is non-expandable, the ProXR version is expandable to 256 relays.  When you find your controller click on the Full Description link to view full specs, watch setup videos, download software and purchase.


RS-232 Relay - 2-Channel
R210
RS232 Relay 2-Channel 10 Amp SPDT
Screw Terminal Relay Connections
  • 2 - 10 Amp SPDT Relay(s)
  • Serial Interface
  • Screw Terminal Connections
  • Quick Start Kit Needed for DB9 Connection
R210PL_ZRS
ProXR Lite RS232 Relay
2-Channel 10-Amp SPDT Relays Installed
  • 2 - 10 Amp SPDT Relay(s)
  • 8 Variable Sensor Input(s)
  • DB9 or Direct Wire Interface
  • Screw Terminal Connections
  • 16 Available Timers
  • ProXR-Lite Series
R210RS
RS232 Relay 2-Channel 5 Amp SPDT
Relay Screw Terminals & Onboard DB9 Connector
  • 2 - 10 Amp SPDT Relay(s)
  • RS-232 Interface
  • Onboard DB9 Connector
  • Terminal Block Relay Connection
R21DPDT
RS232 Relay 2-Channel 1 Amp DPDT
Solder-On Relay Connections
  • 2 - 1 Amp DPDT Relay(s)
  • RS-232 Interface
  • Solder-On Conections
  • Quick Start Kit Needed for DB9 Connection
R21DPDTCN
RS232 Relay 2-Channel 1-Amp DPDT
With Screw Terminal Connections
  • 2 - 1 Amp DPDT Relay(s)
  • Serial Interface
  • Screw Terminal Connections
  • Quick Start Kit Needed for DB9 Connection
R21DPDTCNRS
RS232 Relay 2-Channel 1-Amp DPDT
Screw Terminal & Onboard RS-232 Plug
  • 2 - 1 Amp DPDT Relay(s)
  • DB9 Interface
  • Screw Terminal Connections
  • Onboard DB9 Connection
R220
RS232 Relay 2-Channel 20 Amp SPST
Direct Relay Connections
  • 2 - 20 Amp SPDT Relay(s)
  • RS-232 Interface
  • Direct Relay Connections
  • Quick Start Kit Needed for DB9 Connection
R220PL_ZRS
ProXR Lite RS232 Relay
2-Channel 20-Amp SPDT Relays Installed
  • 2 - 20 Amp SPDT Relay(s)
  • 8 Variable Sensor Input(s)
  • DB9 or Direct Wire Interface
  • Direct Relay Connection
  • 16 Available Timers
  • ProXR-Lite Series
R220RS
RS232 Relay 2-Channel 20 Amp SPDT
Direct Relay Connection & Onboard DB9 Connector
  • 2 - 20 Amp SPDT Relay(s)
  • DB9 Interface
  • Onboard DB9 Connector
  • Direct Relay Connections
R230
RS232 Relay 2-Channel 30 Amp SPDT
Direct Relay Connections
  • 2 - 30 Amp SPST Relay(s)
  • RS-232 Interface
  • Direct Relay Connections
  • Quick Start Kit Needed for DB9 Connection
R230PL_ZRS
ProXR Lite RS232 Relay
2-Channel 30-Amp SPST with Serial Interface
  • 2 - 30 Amp SPST Relay(s)
  • 8 Variable Sensor Input(s)
  • DB9 or Direct Wire Interface
  • Direct Relay Connection
  • 16 Available Timers
  • ProXR-Lite Series
R230RS
RS232 Relay 2-Channel 30 Amp SPST
Direct Relay Connection & Onboard DB9 Connector
  • 2 - 30 Amp SPST Relay(s)
  • Serial Interface
  • Onboard DB9 Connector
  • Direct Relay Connections
R23DPDT
RS232 Relay 2-Channel 3 Amp DPDT
Solder-On Relay Connections
  • 2 - 3 Amp DPDT Relay(s)
  • RS-232 Interface
  • Solder-On Conections
  • Quick Start Kit Needed for DB9 Connection
R23DPDTCN
RS232 Relay 2-Channel 3 Amp SPDT
Screw Terminal Relay Connections
  • 2 - 3 Amp DPDT Relay(s)
  • Serial Interface
  • Screw Terminal Connections
  • Quick Start Kit Needed for DB9 Connection
R23DPDTCNRS
RS232 Relay 2-Channel 3 Amp DPDT
Relay Screw Terminals & Onboard DB9 Connector
  • 2 - 3 Amp DPDT Relay(s)
  • DB9 Interface
  • Screw Terminal Connections
  • Onboard DB9 Connection
R25
RS232 Relay 2-Channel 5 Amp SPDT
Screw Terminal Relay Connections
  • 2 - 5 Amp SPDT Relay(s)
  • Serial Interface
  • Screw Terminal Connections
  • Quick Start Kit Needed for DB9 Connection
R25DPDTCN
RS232 Relay 2-Channel 5 Amp SPDT
Screw Terminal Relay Connections
  • 2 - 5 Amp DPDT Relay(s)
  • Serial Interface
  • Screw Terminal Connections
  • Quick Start Kit Needed for DB9 Connection
R25DPDTCNRS
RS232 Relay 2-Channel 5 Amp DPDT
Relay Screw Terminals & Onboard DB9 Connector
  • 2 - 5 Amp DPDT Relay(s)
  • Serial Interface
  • Screw Terminal Connections
  • Onboard DB9 Connection
R25PL_ZRS
ProXR Lite RS232 Relay
2-Channel 5-Amp SPDT Relays Installed
  • 2 - 5 Amp SPDT Relay(s)
  • 8 Variable Sensor Input(s)
  • Serial Interface
  • Screw Terminal Connections
  • ProXR-Lite Series
R25RS
RS232 Relay 2-Channel 5 Amp SPDT
Relay Screw Terminals & Onboard DB9 Connector
  • 2 - 5 Amp SPDT Relay(s)
  • RS-232 Interface
  • Onboard DB9 Connector
  • Terminal Block Relay Connection
SSR2x
RS-232 2-Channel Solid State Relay Controller
Screw Terminal Relay Connections
  • 2 - Amp Solid-State Relay(s)
  • Serial Interface
  • Quick Start Kit Needed for DB9 Connection
SSR2xRS
2-Channel Solid State Relay - RS-232 Interface
Relay Screw Terminals & Onboard DB9 Connector
  • 2 - Optional Amp Solid-State Relay(s)
  • Serial Interface
  • Onboard DB9 Connector
ZADR220PROXR_ZRS
RS232 Relay 2-Channel 20 Amp SPDT
ProXR Firmware with 8 AD/Contact Closure Inputs
  • 2 - 20 Amp SPDT Relay(s)
  • DB9 or Direct Wire Interface
  • Screw Terminal Connections
  • 16 Available Timers
  • 8 A-D/Contact Closure Inputs
  • XR Port Adds Additional Relays
ZADR230PROXR_ZRS
RS232 Relay 2-Channel 30 Amp SPDT
ProXR Firmware with 8 AD/Contact Closure Inputs
  • 2 - 30 Amp SPST Relay(s)
  • DB9 or Direct Wire Interface
  • Screw Terminal Connections
  • 16 Available Timers
  • 8 A-D/Contact Closure Inputs
  • XR Port Adds Additional Relays
ZUXPR220PROXR_ZRS
RS232 Relay 2-Channel 20 Amp SPDT
ProXR Firmware with UXP Expansion Port
  • 2 - 30 Amp SPDT Relay(s)
  • DB9 or Direct Wire Interface
  • Direct Relay Connection
  • ProXR Series
  • UXP Port Adds Applications
  • XR Port Adds Additional Relays
ZUXPR230PROXR_ZRS
RS232 Relay 2-Channel 30 Amp SPST
ProXR Firmware with UXP Expansion Port
  • 2 - 30 Amp SPST Relay(s)
  • DB9 or Direct Wire Interface
  • Direct Relay Connection
  • ProXR Series
  • UXP Port Adds Applications
  • XR Port Adds Additional Relays