The Eliwell EWPC 902/T is a microprocessor-based, programmable single-setpoint temperature controller designed for various applications, including refrigeration, heating, and air conditioning systems. It features a user-friendly front keypad for programming and setpoint adjustment, along with an alpha-numeric menu for configuration. The controller is housed in a compact, auto-extinguishing black ABS plastic casing, designed for flush panel mounting with an included bracket. Its front panel offers IP65 protection, and an optional cover can be added for enhanced rear terminal block protection. The device utilizes non-volatile EEPROM memory for data storage.
### Technical Specifications
* **Model:** EWPC 902/T
* **Type:** Temperature Controller
* **Control Type:** Single Setpoint, ON/OFF control with adjustable switching hysteresis (differential).
* **Programming:** Fully programmable via front keypad with alpha-numeric menu prompts.
* **Display:** 12.5 mm LED display (0.50 inches).
* **User Interface:** Front panel push buttons for setpoint adjustment and parameter programming.
### Electrical Specifications
* **Power Supply:** 12 VAC/DC ±15% or 24 VAC/DC ±15% (model dependent).
* **Main Output:** 1 x SPDT Relay, rated 8(3)A at 250V AC.
* **Auxiliary Output:** 12 VDC / 60 mA, suitable for powering transducers (e.g., humidity sensors, pressure transducers).
### Interfaces and Inputs
* **Input Types (Model Dependent):**
* PTC
* RTD (Ni100, Pt100)
* TC (J, K)
* 4-20 mA (Input impedance Ri = 41 Ω)
* **Error Indication:**
* “- – -” for shorted sensor.
* “EEE” for sensor break, absence, or over/under-range conditions.
### Physical Specifications
* **Housing Material:** Black ABS plastic, auto-extinguishing.
* **Dimensions:**
* Front: 74 x 32 mm (2.913 x 1.260 inches).
* Depth: 67 mm (2.637 inches).
* **Mounting:** Flush panel mount with mounting bracket.
* **Panel Cutout:** 29 x 71 mm (1.14 x 2.80 inches).
* **Protection:** Front panel IP65 rated. Optional snap-on cover for rear terminal block.
* **Connections:** Screw terminal block, suitable for 2.5 mm² wires (one wire per terminal, VDE compliant).
### Environmental Specifications
* **Operating Temperature:** –5°C to 65°C (23°F to 149°F).
* **Storage Temperature:** –30°C to 75°C (–22°F to 167°F).
### Compatibility
* **Sensor Compatibility:** Compatible with PTC, Ni100, Pt100, J type Thermocouple, K type Thermocouple, and 4-20 mA current loop sensors.
* **Other Eliwell Sensors:** Can be powered by the controller when used with Eliwell humidity (EWHS 28/31) or pressure (EWPA 007/030) sensors.
### Features
* **Resolution:** 1°C or 0.1°C (also selectable as 5°C or 0.5°C).
* **Accuracy:** Better than 0.5% of full scale.
* **Data Storage:** Non-volatile EEPROM memory.
* **Defrost Functions:** Supports Off Cycle Defrost, Defrost with Temperature Termination, and Defrost with Fan Delay.
* **Control Modes:** Can be configured for Heating (relay makes on fall) or Cooling (relay makes on rise) applications.
* **Setpoint Limits:** Configurable Lower Set (LS) and Higher Set (HS) limits to restrict user-adjustable setpoint range.
* **Calibration:** Field calibration offset of +/- 20 degrees is possible.
* **Relay Protection:** Configurable relay output behavior upon sensor fault (Open or Close).
Why Choose Aumictech for the Eliwell EWPC 902/T Temperature Controller?
At Aumictech, we specialize in supplying high-end industrial automation equipment. Whether you need reliable temperature regulation for critical processes, precise control for energy efficiency, or robust components for system integration, our team ensures the Eliwell EWPC 902/T delivers maximum performance for your application.
