Omron Temperature Controller E5EZ--PRRL-888

Core Specifications Category Details Product Type E5EZ-PRR series 1/8 DIN digital position proportional controller (analog input, 4–20 mA output, event input, 100–240 VAC, terminal block) Manufacturer Omron Automation Mounting Panel mount (45×92 mm cutout); terminal block connection Power Supply 100–240 V AC (50/60 Hz); power consumption: ≤10 VA Input Type Universal analog input (4–20 mA DC/0–20 mA DC/1–5 V DC/0–5 V DC/0–10 V DC); software-selectable Display 3-row 4-digit LCD (PV: white backlight, SV: orange, MV: green); status indicators (RUN/STOP, alarm, auto-tuning) Control Output 1×linear current output (4–20 mA DC; load resistance: ≤600 Ω) for valve/actuator position control Control Method Position proportional control (float control or close control); PID/ON/OFF with auto-tuning (40% AT); standard/heating-cooling mode Event Input 1×dry contact input (configurable for RUN/STOP, setpoint switching, external reset) Auxiliary Outputs 1×SPDT relay (250 VAC 2 A resistive max; configurable for high/low limit, deviation, sensor fault) Key Functions Float control (position-proportional without potentiometer); manual output mode; auto/manual switching; 3-row PV/SV/MV display; non-volatile memory (100,000 write cycles); output cycle counting Sampling Period 60 ms Indication Accuracy Analog input: ±0.2% FS ±1 digit Front Protection IP66 (front panel); IP20 (rear case) Operating Temperature -10°C to +55°C (no condensation/icing) Certifications CE, UL, CSA, RoHS compliant Dimensions 48×96×78 mm (W×H×D) Weight ~200 g Key Functions & Advantages Position Proportional Valve Control Float control eliminates potentiometer calibration for direct 4–20 mA valve positioning, reducing setup time in water treatment plants or HVAC systems. Linear current output (4–20 mA) drives proportional valves/dampers for smooth flow modulation, avoiding pressure spikes vs. ON/OFF relay outputs. Universal analog input supports mixed process signals (e.g., flow sensor 4–20 mA + pressure transducer 0–10 V), adapting to diverse control loops without hardware changes. User-Friendly Operation & Monitoring 3-row LCD displays PV (process value), SV (setpoint), and MV (output level) simultaneously, simplifying real-time status checks during commissioning. Event input enables multi-setpoint switching via dry contacts (e.g., day/night mode for HVAC, batch recipe changes in chemical dosing). Auto-tuning (40% AT) optimizes PID parameters for dynamic loads (e.g., variable flow rates), minimizing overshoot/undershoot in temperature/pressure control. Reliable Performance & Maintenance Non-volatile memory preserves parameters during power loss, ensuring process continuity in critical applications (e.g., chemical reactors). Output cycle counting tracks relay cycles for preventive replacement; manual output mode allows valve positioning during troubleshooting. Compact 78 mm depth saves panel space; IP66 front protection withstands washdown in food/beverage processing environments.