Dual Channel RS232 Serial Relay Board with/IO

Features

Low cost 2 channel serial relay board with IO ports controlled through one of the RS232 serial ports, with standard or optional reed relays

Standard -  10 Amp 250VAC/28VDC SPDT power/general purpose relays
Optional -  SPST reed relays for fast switching and high reliability, 200VDC/200VAC resistive 0.5A "-R" option

 

ASCII commands to control relays.
Easy hook up using standard modular telephone cable.
Any software language that can write to the PC serial port can be used with this relay board NO special drivers needed.
4800-38400 baud (default 9600 baud)
LED Indicators for relays
8 channel logic (TTL) input/output port 
2 channel opto-isolated input port

Two versions available:

Model: S2-RLY-IO-EXT - powered by an external wall transformer. (enclosure available for this model only, order P/N RLY-ENC-EXT-IO below)
Model: S2-RLY-IO-INT - with an on board 115VAC 50/60Hz power transformer. (NO enclosure available).

Input/Output Port:
Both units have a non-isolated 8 channel TTL compatible (0-5VDC) input or output port, individually selectable as an input or an output.  

Additionally both boards have a 2 channel opto-isolated input port capable of accepting up to 24VDC directly to the pins. 5000V isolation, 4uS typical response time.  4 position terminal block connection, 16-26 AWG wire.

Longer 4-conductor modular cable assemblies are available if the supplied cable is too short for your application.

 

Instruction Manual:

1-2 Ch Relay W/IO Instruction Manual (193KB, PDF)

Application Notes:

Application Note 115 (92K, PDF) - How to determine if our serial relay boards will operate with a specific software or operating system.
Application Note 156 (127K, PDF) - Board command information -- explains in detail the structure of the board commands.
Application Note 158 (172K, PDF) - Operation and wiring examples for the I/O Ports and Opto-isolated Input Ports.

See the support section for additional information.

Single Channel RS232 Relay board

S2-RLY-IO-INT (internal transformer shown)

Applications

Industrial control applications
Automatic test equipment (ATE)
Process control systems
Power switching applications

Model S2-RLY-IO-EXT Includes:
2 Channel Relay board with 10 Amp power relay
300 mA 9VDC output wall transformer.
9-pin RS232 to modular cable adapter
7' Modular cable

Model S2-RLY-IO-INT Includes:
2 Channel Relay board with 10 Amp power relay
300 mA 115VAC 50/60Hz on board power transformer
9-pin RS232 to modular cable adapter
7' Modular cable

Relay testing software available for Windows to program and verify operation of the relay board before writing your own software program.  Please note: The relay board does not ship with software, see below to download the software or order the software on disk.

Software:

Relay Test Program
Download software here or order on disk below.

Additional relay control software is available to operate the relay boards.

Software Examples:
Visual Basic
Visual Basic for Applications

Quantity discounts available on order page.

Click on the order button next to the price to add this item to your shopping cart.

Description Part Number Price  
Dual Channel Relay Board w/wall Transformer S2-RLY-IO-EXT $61.95 Click here to add to your shopping cart
Dual Channel Relay Board w/on-board 115VAC 50/60Hz Transformer S2-RLY-IO-INT $61.95 Click here to add to your shopping cart

Note: The reed relay boards below are identical to the standard units except they have the reed relays installed. The reed relays are SPST and the common and NO (normally open) contacts are used on the terminal block, the NC contact is not used when these relays are installed.  

Reed relays are typically used in low current, fast switching, low bounce, and high reliability applications (up to 10 billion operations), as in ATE equipment. No minimum current or voltage requirements. Reliability tested to 1 billion operations (from the manufacturer's specifications). Single pole single pole configuration. 200VDC/200VAC Peak Resistive, reed relays are typically not designed for controlling inductive loads.

Reed Relay Datasheet (271KB)

Reed Relay Version "-R" Suffix

Description Part Number Price  
Dual Channel Relay Board w/IO & wall Transformer S2-RLY-IO-EXT-R $68.95 Click here to add to your shopping cart
Dual Channel Relay Board w/IO & on-board 115VAC 50/60Hz Transformer (w/reed Relays) S2-RLY-IO-INT-R $68.95 Click here to add to your shopping cart

Accessories

Description Part Number Price  
Relay Board Enclosure w/IO Slots (For boards with part number suffix "-EXT" ONLY) RLY-ENC-EXT-IO $14.48 Click here to add to your shopping cart
Software Combo includes, RTP, CLS & ECP and application notes on Mini-CD SOFT-COMBO $5.95 Click here to add to your shopping cart

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