Power controller with four SSR drive outputs and heater fault detection
The Omron G3ZA-4H403-FLK-UTU is a G3ZA series power controller delivering four solid-state voltage outputs to drive external SSRs — meaning it handles up to four independent heater zones from a single unit, with each output switching the external SSR gate rather than carrying load current directly. Its RS-485 port uses the CompoWay/F protocol, which is Omron's standard serial command set for PLC and HMI integration — no Modbus mapping required if the host already speaks CompoWay/F. The built-in heater fault detection monitors current draw on each zone and flags a broken heater or SSR short before the process drifts — a feature that saves scrap on continuous thermal processes like extrusion or packaging seal bars. On/off control method suits simple temperature hold applications; for PID loop control a separate temperature controller (such as the E5CC-T series) feeds the setpoint to this unit. Supply range 85-264 VAC covers both 100 V and 200 V class line voltages globally — no transformer tap change needed when moving between 110 V and 220 V regions.
Chassis-mount or DIN-rail mounting gives flexibility for new panels or retrofit into existing enclosures. IP20 rated — suitable for clean, dry control cabinets only. Not for washdown or outdoor locations without a sealed enclosure. Screw-terminal wiring for both power and control connections.