RS-232 RELAY Controller

The ALFTECH RS-232 Relay Controller can be used in any application that needs to control multiple relays from a RS-232 serial device. It contains 40 single pole double throw relays, controlled by a single serial port.
Multiple units can be daisy chained to create a combination of up to 400 individual relay outputs from a single RS-232 port.

RELC-RM1 Hardware Features

NOTE: Each RELC-RM1 is assembled by hand on order

Hardware Connections

  • 100-240 VAC IEC Power Socket

  • 10 x 12 pin sockets for 4 relays each

  • RS-232 connections for master and slave units

  • ID switch on back panel


Hardware Indicator LED's

  • Power LED

  • Data received LED

  • 40 LED’s to indicate relay state

RELC-RM1 Product Datasheet (Requires Acrobat Reader)

RELC-RM1 Product Price List (Assemble to Order)

For more information please contact us at:

In South Africa, Wild & Marr can be contacted for ALFTECH product sales and installations, and Intercom & Time Control (North) CC (Western Cape) for ALFTECH Products sales including the ALFTECH DPT-EN4 in the Western Cape and surrounding areas. SOUNDCOM distributes ALFTECH products in Southern Africa.