The E5CC-QX2DSM-802: Accepts RTD and thermocouple inputs, with on/off or PID control and heater fault detection.
Outputs: two relays (for alarms or on/off control) plus a voltage pulse for external SSR. That covers most heater control loops where one relay drives the contactor and the second signals an alarm. No analog output here — if you need 4-20mA retransmission, look at the E5CC-CX3A5M-004. RS-485 communication with Modbus and CompoWay/F protocols. IP66 front panel — rated dust-tight and water-resistant, so it survives washdown zones. The rear is IP20; the full seal comes from the included gasket and properly torqued bezel.
Against the E5CC-RX3A5M-003: same panel cutout (45mm square), same sensor inputs and control method, same RS-485 interface. The differences that matter: the -RX3A5M-003 runs on 100-240VAC and gives you four relay outputs instead of two relays plus voltage-for-SSR. If your application needs the second relay for alarm and you already have a 24V supply, the -QX2DSM-802 is the correct pick. If you need 240VAC primary power and three or four independent relay outputs, go with the -RX3A5M-003.