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.