The Three Relay Module (3RM) converts an analogue output of an IQ controller to three stages of relay output, and acts as an interface between Trend equipment and heating and ventilating equipment. It may be configured as a Fan/Heating/Cooling sequence controller (HCM) or a 3 stage sequence controller (TRM) using the operating mode link. There are manual override links for each relay to aid commissioning. Field wiring is facilitated by rising cage clamp type output terminals, and a supply loop terminal aids wiring to additional modules.