USB-RLY08-B USB-Relay Module

Devantech

The USB-RLY08-B provides eight volt free contact relay outputs with a current rating of up to 1Amp each. It is powered from any standard USB bus and has an exceptionally low maximum current consumption of approx. 90mA with all relays on. The relays are SPCO (Single Pole Change Over) types. The normally open, normally closed and common pins are all available on the screw terminals.
The USB-RLY08-B is an update of the obsolete USB-RLY08. It uses a different USB driver, otherwise is a drop in replacement.

Overview

USB-RLY08
Number of Relays	8
Power	Powered from standard USB bus
Control interface	USB
Relay current	Up to 1Amp @30vdc or 60vac. 500mA@110vac. 250mA@250vac
Connections	Screw Terminals for N/O N/C and Common contacts

LED indication

The USB-RLY16 provides a red LED mounted immediately next to each relay to indicate whether it is in a powered state (LED on), there is also two LED's which will flash with USB transactions to and from the module, green indicating reception of data from the PC and yellow the transmission of data to the PC. Finally there is red power LED mounted near to the USB connector.

Relay power rating

If the contact load voltage and current of the relay are in the region enclosed by the solid and dotted lines in the figure below, the relay can perform stable switching operation. If the relay is used at a voltage or current exceeding this region, the life of the contacts may be significantly shortened.

Driver

Before connecting the USB-RLY08B module, you should download the driver and unzip it to a temporary folder. Now connect the USB-RLY08B module and navigate windows to the temporary folder and install the driver. The USB-RLY08B will now appear as a COM port.

Board dimensions

Manufacturer's data

Technical Specification - link to the manufacturer