This is an 8 channel relay interface board that plugs into your STU pins. Each output has changover relay contacts. Works on Castle Euro Meridian G3+ and many other control boards. Signals on channels 1, 2, 3, 4, 5, 6, 9 and 10. Fully tested, from an upgraded system, includes wiring sheet.
8 CHANNEL RELAY INTERFACE FOR STU PINS
