URB Universal Relay Board

URB-4 Four board assembly - $44

(Other assemblies available with purchases of other Industrologic products)

The Industrologic URB is a relay printed circuit board assembly designed to allow microcontroller and other logic circuits to control medium current loads. It features a single-pole double-throw "Form C" relay with 24 volt 1 amp contacts, and includes convenient terminal block connections, transistor drivers, a back EMF suppression diode, and LED indicator.

The URB is designed to be used with microcontroller boards or other logic circuits that have 5 volts and ground available to power the URB, and low current logic level outputs to activate the relays. The URB is "universal" in that it can accept either active-high or active-low outputs. Separate connections are provided for either or both, and if both are used they can provide a "wired OR" connection.

The URB originates as a 4 board assembly that can be separated into individual boards by snapping the boards apart along a pre-cut score line. Each individual relay board is then 1 inch wide, 2 inches long, 0.6 inch thick, and contains identical components and functions.

http://www.industrologic.com