This low cost, general purpose, USB powered card has  4 opto-isolated relays and four general purpose digital I/O channels.

The relays are high sensitivity (gold contact) signal relays (30VDC@1A).  Access to all relay contacts and the 4 DIO channels is via fixed screw terminal block connectors  along the edge of the card. 

Suitable for a wide range of control and signal switching purposes, it also offers screw terminal access to the USB power connections for possible onward powering/use in your target system .  The card comes with +5V & relay channel LED status indicators. 

Nylon feet are fitted in each corner which will take self tapping screws.  They can easily be removed to allow the cards to be mounted on pillars or stacked.  There is also a perspex cover available which offers general protection of the card and prevents accidental contact with any of the relay contacts or screw terminal connections.  In addition, there is a DIN rail mount/cover option available.

These are industry standard relay boards and products.  High quality, for professional electronic  automation,  connectivity, and control.

Easydaq products are used in research and education, security, industrial applications, power and energy management,  motor and device  control. There are uses across various industries, including  maritime , rail,  automotive, automation, measuring and calibration, agriculture , medical, sanitation, light and power solutions, fire protection, defence, security, and many more.

Download datasheet

Operational Parameters
Control Interface USB
Relay Channels 4
Digital input channels 4
Relay Type S
Digital output channels 4
Opto-isolated Y

USB4SRMx

  • Product Code: USB4SRMx
  • Availability: In Stock
  • £52.00


  • 10 or more £46.80
  • 25 or more £45.50
  • 50 or more £44.50
  • 100 or more £43.80

Related Products

CoverUSB4MxDIN

CoverUSB4MxDIN

CoverUSB4MxDIN A Perspex cover for the USB4Mx which offers general protection of the card and pre..

£20.00

CoverUSB4Mx

CoverUSB4Mx

A Perspex cover for the CoverUSB4Mx which offers general protection of the card and prevents a..

£8.00

USBcable3M

USBcable3M

3 metre type A/B USB cable, suitable for use with any of our USB card product range..

£4.00

Suppressor_250VAC

Suppressor_250VAC

Recommended for use across relay contacts in 120/240VAC mains switching applications.  (Minimis..

£2.50

Tags: USB4SRMx