National Control Devices, LLC

World's Largest Manufacturer of Computer Controlled Switching Devices Since 1995.
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8 Channel RS232 Relay

Serial Relay  RS-232 Relay Board

Powerful Commands

Our 8 Channel RS232 Relay Controller offers a powerful command set allowing computer control of several external devices using only a few short commands. Our new and improved command set allows you to set the status of all relays at once or one relay at a time. 

RS232 Switching with a Serial Port

RS232 Relay or Serial Relay Controllers allow computer controlled switching using the Serial port of your computer.  Select NCD Serial Relay Drivers support 8-Channels of 8-Bit / 10-Bit Analog to Digital Conversion (A/D), and include an XR Relay Expansion Port for adding additional relays to the RS232 Relay Controller Board.

Supports any COM Port

An RS232 Relay supports any available COM port at any standard baud rate, allowing easy integration into any program that support serial communications. The RS232 Relay is ideally suited for applications that require data collection and control from a single device. Built-in temperature sensor allows temperature monitoring, analog to digital conversion, and relay control from a single device. RS-232 interface supports baud rates up to 115.2K Baud.

Easy Connection with the Quick Start Kit


The video shows how easy it is to connect an RS232 Relay to the computer with the optional Quick Start Kit.  The R45Pro Quad Relay Controller is shown connected to the optional QS12 Quick Start Kit.

8-Channel RS-232 Relay Boards

R85PRO
RS-232 8-Channel Relay Driver Board with 5 Amp Relays
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$139.00
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R810PRO
Professional RS-232 8-Channel Relay Driver Board with 10 Amp Relays
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$159.00
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R81DPDT
8-Channel 1-Amp DPDT Small Signal Latching Relay Board
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$119.00
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R83DPDT
8-Channel 3-Amp DPDT Signal Latching Relay Board
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$139.00
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R85DPDT
8-Channel 5-Amp DPDT High-Current Signal Latching Relay Board
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$159.00
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R820
8-Channel 20-Amp SPDT High-Power Latching Relay Board
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$209.00
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R830
8-Channel 30-Amp SPST High-Power Latching Relay Board
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$249.00
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SSR82AC
RS-232 8-Channel 2-Amp AC SPST Solid-State Latching Relay Board
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$129.00
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PWM81
RS-232 8-Channel 1-Amp Speed Controller/Light Dimmer Board
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$99.00
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PWM83
RS-232 8-Channel 3-Amp Speed Controller/Light Dimmer Board
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$119.00
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PWM85
RS-232 8-Channel 5-Amp Speed Controller/Light Dimmer Board
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$134.00
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F81
RS-232 8-Channel 1-Amp N-Channel FET Latching Relay Board
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$99.00
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F83
RS-232 8-Channel 3-Amp N-Channel FET Latching Relay Board
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$119.00
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F85
RS-232 8-Channel 5-Amp N-Channel FET Latching Relay Board
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$134.00
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ADR85PROXR
RS-232 Latching Relay Board 8-Channel 5 Amp SPDT + 8-Channel 8/10-Bit A/D
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$164.00
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ADR810PROXR
RS-232 Latching Relay Board 8-Channel 10 Amp SPDT + 8-Channel 8/10-Bit A/D
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$184.00
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ADSSR8xPROXR
RS-232 8-Channel Solid State Relay Controller + 8-Channel 8/10-Bit A/D
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$164.00
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ADSSR8xPROXR_MIX
RS232 8-Channel Solid State Mixed SSR Relay Controller + 8-Channel 8/10-Bit A/D
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$164.00
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R810OC8LP
8-Channel 10A SPDT Relay + 8-Channel 150ma O.C. Output RS-232 Latching Relay Board
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$188.00
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R81DPDTCN
8-Channel 1-Amp DPDT RS-232 Relay Controller with Relay Interface
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$139.00
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R81DPDTCNRS
8-Channel 1-Amp DPDT Relay Controller with RS-232 and Relay Interface
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$149.00
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R81DPDTOC8LP
8-Channel 1A DPDT Relay + 8-Channel 150ma O.C. Output RS-232 Latching Relay Board
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$160.00
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R83DPDTCN
8-Channel 3-Amp DPDT RS-232 Relay Controller with Relay Interface
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$159.00
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R83DPDTCNRS
8-Channel 3-Amp DPDT Relay Controller with RS-232 and Relay Interface
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$169.00
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R83DPDTOC8LP
8-Channel 3A DPDT Relay + 8-Channel 150ma O.C. Output RS-232 Latching Relay Board
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$180.00
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R85DPDTCN
8-Channel 5-Amp DPDT RS-232 Relay Controller with Relay Interface
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$179.00
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R85DPDTCNRS
8-Channel 5-Amp DPDT Relay Controller with RS-232 and Relay Interface
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$189.00
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R85DPDTOC8LP
8-Channel 5A DPDT Relay + 8-Channel 150ma O.C. Output RS-232 Latching Relay Board
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$200.00
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R85OC8LP
8-Channel 5A SPDT Relay + 8-Channel 150ma O.C. Output RS-232 Latching Relay Board
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$168.00
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UXPSSR8xPROXR
RS-232 8-Channel Solid State Relay Controller + UXP Expansion Port
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$164.00
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UXPSSR8xPROXR_MIX
RS232 8-Channel Solid State Mixed SSR Relay Controller + UXP Expansion Port
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$164.00
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About National Control Devices
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National Control Devices, LLC

PO Box 455 - Osceola - MO - 64776
Phone: 417.646.5644 - Fax: 866.562.0406
Open 9AM-4PM Central Standard Time
http://www.relaycontrollers.com/