Controller architecture and output assignment
The Omron E5EC-QR2ADM-820 is a digital temperature controller with a universal input (M) that accepts thermocouple, RTD, or analog signals without a separate input module. Control output 1 is a voltage pulse for driving an external SSR; control output 2 is a relay contact for direct on-off switching of a contactor or alarm. Two auxiliary outputs are included for secondary events such as heater break alarm, loop break alarm, or remote set-point selection. The 100-240 VAC supply range covers standard industrial control voltages without a step-down transformer.