National Control Devices, LLC

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

Serial Relay  RS-232 Relay Board

Conveniently Small Size

Our Quad RS232 Relay Controller offers a conveniently small size with the integrated power of our standardized PRO relay command set. 4 Channel Relay Controllers are ideal for computer control applications where small size and high functionality are required.  We offer a large selection of Four Relay Drivers for applications ranging from low power signal switching to high voltage, high current applications. 

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.

4-Channel RS-232 Relay Boards

R45PRO
Professional RS-232 4-Channel Relay Driver Board with 5 Amp Relays
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$99.00
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R410PRO
Professional RS-232 4-Channel Relay Driver Board with 10 Amp Relays
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$109.00
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R41DPDT
4-Channel 1-Amp DPDT Small Signal Latching Relay Board
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$89.00
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R43DPDT
4-Channel 3-Amp DPDT Signal Latching Relay Board
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$99.00
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R45DPDT
4-Channel 5-Amp DPDT High-Current Signal Latching Relay Board
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$109.00
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R420
4-Channel 20-Amp SPDT High-Power Latching Relay Board
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$149.00
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R430
4-Channel 30-Amp SPST High-Power Latching Relay Board
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$169.00
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ADR45PROXR
RS-232 Latching Relay Board 4-Channel 5 Amp SPDT + 8-Channel 8/10-Bit A/D
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$124.00
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ADR410PROXR
RS-232 Latching Relay Board 4-Channel 10 Amp SPDT + 8-Channel 8/10-Bit A/D
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$134.00
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ADSSR4xPROXR
RS-232 4-Channel Solid State Relay Controller + 8-Channel 8/10-Bit A/D
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$124.00
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ADSSR4xPROXR_MIX
RS232 4-Channel Solid State Mixed SSR Relay Controller + 8-Channel 8/10-Bit A/D
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$124.00
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R41DPDTCN
4-Channel 1-Amp DPDT RS-232 Relay Controller with Relay Interface
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$99.00
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R41DPDTCNRS
4-Channel 1-Amp DPDT Relay Controller with RS-232 and Relay Interface
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$109.00
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R43DPDTCN
4-Channel 3-Amp DPDT RS-232 Relay Controller with Relay Interface
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$109.00
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R43DPDTCNRS
4-Channel 3-Amp DPDT Relay Controller with RS-232 and Relay Interface
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$119.00
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R45DPDTCN
4-Channel 5-Amp DPDT RS-232 Relay Controller with Relay Interface
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$119.00
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R45DPDTCNRS
4-Channel 5-Amp DPDT Relay Controller with RS-232 and Relay Interface
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$129.00
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UXPSSR4xPROXR
RS-232 4-Channel Solid State Relay Controller + UXP Expansion Port
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$124.00
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UXPSSR4xPROXR_MIX
RS232 4-Channel Solid State Mixed SSR Relay Controller + UXP Expansion Port
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$124.00
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Customer Support
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/