Omron Temperature Controller E5EZ-PRRL-888D

Core Specifications Category Details Product Type E5EZ series 1/8 DIN position proportional controller (SSR voltage output, universal input, Modbus RTU) Manufacturer Omron Automation Mounting Panel mount (45×92 mm cutout); screw terminals with cover Power Supply 100–240 V AC (50/60 Hz); power consumption: ≤10 VA Sensor Input Universal (J/K/T/E/R/S/B/N/L/U/W/PLII thermocouple; Pt100 RTD; 4–20 mA DC / 0–5 V DC analog); accuracy: ±0.3% PV ±1 digit; sampling period: 250 ms Display 3-line 4-digit LCD (PV: 11 mm white; SV: 8 mm orange; MV: 8 mm green); 0.1°C resolution; status indicators (RUN/STOP, alarm) Control Outputs 1×12 V DC voltage output (20 mA max) for SSR triggering; 1×4–20 mA DC transfer output (max load: 600 Ω) Control Method Position proportional control (floating/close control selectable); PID with auto-tuning Event Inputs 1×event input (for start/stop, multi-SP switching) Auxiliary Outputs 1×SPDT alarm relay (250 VAC 2 A resistive max); configurable for high/low limit, deviation, sensor fault alarms Key Functions Modbus RTU (RS-485), alarm delay, manual output adjustment, non-volatile memory, loop break alarm (LBA) Protection Front panel IP40; rear IP20; RoHS compliant Operating Temperature -10°C to +55°C (no condensation/icing) Certifications CE, UL, CSA compliant Dimensions 48×96×78 mm (W×H×D); weight: ~150 g Key Functions & Advantages Position Proportional Control Precision SSR voltage output enables precise valve position control; 4–20 mA transfer output for PLC monitoring of valve opening (MV). Floating/close control modes eliminate potentiometers, reducing wiring and maintenance in flow/air control loops (e.g., HVAC dampers, steam valves). Universal input supports diverse sensors, allowing use across temperature/flow/pressure loops without controller replacement. Process Flexibility & Monitoring Event input enables remote start/stop or multi-setpoint switching for batch processes (e.g., heating ramp/soak profiles). 3-line LCD displays PV (process value), SV (setpoint), and MV (valve position) simultaneously, simplifying operator monitoring. Modbus RTU (RS-485) allows integration with SCADA/PLC systems for centralized control and data logging. Safety & Reliability Loop break alarm (LBA) detects sensor/actuator wiring faults, triggering alarm and output hold to prevent equipment damage. Alarm delay function avoids false triggers from transient process fluctuations (e.g., pressure spikes in flow control). Non-volatile memory preserves settings during power loss; tamper-proof access levels prevent unauthorized changes.