What It Is & What It Does
The E5CC-TQQ3D5M-005: Control method is on/off or proportional (PID), and the dual-color LCD backlight shows 4+4 characters per row. Rated IP66 on the front, so it holds up in washdown or dusty environments.
The E5CC-CX3A5M-004 also fits a 45 mm square cutout and shares the same input range and IP66 rating, but runs on 100–240 VAC and swaps one voltage (SSR) output for an analog (4–20 mA) output. It also adds RS-485 communications. So while both sit in the same panel hole, the TQQ3D5M-005 cannot be a drop-in replacement: supply voltage and output complement differ. If your BOM calls for 24 VDC operation and relay/SSR drive without a serial link, this is the one; the CX variant pulls 100–240 VAC and speaks Modbus. Another sibling, the E5CC-RX3A5M-003, also runs 100–240 VAC and adds heater fault detection instead of the event input. The event input on this unit lets you remotely hold or reset the controller or trigger alarms — a feature heater-fault detection doesn't cover.
Integration Notes (Panel Fit & Wiring)
The event input is a dry-contact digital input. Use shielded twisted-pair if the run is more than a few meters, especially near VFDs or contactors. Ground the shield at one end only to keep ground loops off the controller's logic. Supply is 24 VAC/DC — verify that your control transformer or DC supply is dedicated to the controller. Sharing the same 24 VDC rail with heavy inductive loads (relay coils, solenoids) can introduce noise. Watch the polarity if using DC; the unit is bridge-rectified but a reversed DC supply may not damage it, but it won't operate.