The Sontay IO-RM4 relay modules is intended for use with BMS controllers to convert an analogue control output to four relay outputs. Example for the Sontay IO-RM4 applications include the control of raise/lower valves, damper actuators, pump changeover and boiler control. LEDs indicate correct operation and Hand/Off/Auto jumpers ease commissioning. Low current draw from 0-10Vdc controller output means that the IO-RM range works with most BEMS controllers.