The Dwyer/Omega CN9111A is a 1/16 DIN Autotune Temperature Controller designed for precise temperature regulation across various industrial, commercial, and laboratory applications. It features a 3.5-digit green LED display with 1 or 0.1° resolution, capable of displaying temperatures in Celsius or Fahrenheit. This controller supports user-selectable inputs from nine thermocouple types or 2-wire RTD, with options for 3-wire RTD input. The CN9111A incorporates sophisticated PID control with autotune capabilities, offering PDPI (PID with approach control) for optimized start-up and steady-state operation. It includes a comprehensive alarm system with deviation, full-scale, and loop break features, along with fault indications for sensor burnout, short circuits, and heater breaks. Additional functionalities include min/max data storage, autotune diagnostics, auto/manual output control, and parameter locking. The controller is available with 115 VAC input as standard, with optional 24 VAC or 230 VAC configurations. It provides two relay outputs: Output 1 is a 5A SPDT relay, and Output 2 is a 3A SPDT relay. An optional non-isolated 5 Vdc pulse output is also available for driving external DC-controlled solid-state relays. The unit is designed for easy installation and operation, with all operational controls accessible via the front panel. Data is stored in non-volatile memory for up to 10 years without power.
### Technical Specifications
**General**
* **Manufacturer:** Dwyer/Omega
* **Model:** CN9111A
* **Product Family:** CN9000 Series
* **Form Factor:** 1/16 DIN
* **Control Type:** Autotune PID, PI, PD, P, or On/Off
* **Input Type:** User-selectable from nine thermocouple types or 2-wire RTD; also supports 3-wire RTD input.
* **Display:** 3.5-digit green LED, 10 mm (0.4″) high
* **Display Resolution:** 1° or 0.1° (up to 200°)
* **Units:** Selectable °C / °F
* **Power:** 115 VAC (standard), optional 24 VAC or 230 VAC
* **Power Consumption:** 6 VA
* **Memory Retention:** Non-volatile memory retains data for up to 10 years without power.
**Control and Tuning**
* **Control Algorithm:** Sophisticated PID with Approach Control (PDPI), Autotune PID
* **Autotune:** Unit determines optimal proportional band, integral, and derivative values.
* **Cycle Time:** Selectable from 0.3, 1, 2, 3, 5, 7, 10, 14, 20, 30, 45, or 60 seconds.
* **Proportional Band:** Adjustable from 0.5 to 3% FS (and other increments).
* **Integral (Auto Reset) Time:** Adjustable from Off to 2 (and other increments).
* **Derivative (Rate) Time:** Adjustable from Off to 5 (and other increments).
* **Approach Control:** Adjustable from Off to 2.5 (and other increments).
* **On-Off Deadband:** Adjustable from 0.25 to 1 (and other increments).
* **Manual Reset:** PD, proportional, and on/off control.
* **Auto/Manual Output Control:** Supported.
* **Setpoint 1:** User selectable control modes.
* **Setpoint 2 (Optional):** Functions as a deviation alarm (high or low), “out of limits,” or for proportional/on-off control. Can be set as a deviation from Setpoint 1 or full scale.
* **Second Output:** Standard on CN9111A.
**Performance Specifications**
* **Accuracy:** ±0.25% FS, ±1°C (0.5°C in 0.1° resolution mode), requires 30-minute warm-up.
* **Control Stability:** ±0.15% FS (typical).
* **Sample Rate:** 3 per second.
* **Temperature Coefficient:** Less than 150 ppm/°C (max).
* **External Resistance:** 100Ω max (for RTD input).
* **Cold Junction Compensation:** 0.05 degrees/degree ambient (typical).
**Alarm and Diagnostics**
* **Comprehensive Alarm Features:** Deviation, Full Scale, Loop Break with Latching Option.
* **Fault Indication:** For Sensor Burnout, Sensor Short, Heater Break, and Process Diagnostics.
* **Min/Max Data Storage:** Stores minimum and maximum process values.
* **Autotune Diagnostics:** Provided.
**Outputs**
* **Output 1:** 5A SPDT Mechanical Relay @ 250 Vac.
* **Output 2:** 3A SPDT Mechanical Relay @ 250 Vac.
* **DC Pulse Output (Optional/Field Installable):** Non-isolated 5 Vdc Pulse for driving external DC solid-state relays.
**Physical and Environmental**
* **Dimensions:** 48 mm H x 48 mm W x 13 mm D bezel (1.89″ x 1.89″ x 0.5″).
* **Depth Behind Panel:** 115 mm (4.5″).
* **Total Depth (with Triac/Current Output):** 154 mm (6.1″).
* **Panel Cutout:** 45 mm square (1.772″).
* **Weight:** Approximately 0.38 kg (0.84 lb).
* **Ambient Operating Range:** 4 to 50°C (40 to 122°F).
**Interfaces**
* **Front Panel Controls:** Keypad for setting parameters and operation.
* **Display Indicators:** 3-LEDs for deviation from setpoint indication.
* **Output Status Indicators:** Auxiliary indicators for each output.
**Compatibility**
* **Input Sensors:** Thermocouple types (J, K, T, E, R, S, B, L, U), 2-wire RTD (Pt100, JPt100), 3-wire RTD (Pt100, JPt100).
* **Output Modules:** Field-replaceable output modules are available.
* **Voltage Conversion:** Capable of 115 VAC to 230 VAC conversion by qualified technicians.
**Certifications and Compliance**
* **UL Recognition:** 115 VAC models are UL recognized. UL not available for 230 VAC models.
### Why Choose Aumictech for Dwyer/Omega CN9111A Temperature Controller?
At Aumictech, we specialize in supplying high-end process control equipment. Whether you need precise temperature regulation for critical manufacturing processes, robust control solutions for laboratory environments, or reliable instrumentation for system integration, our team ensures the Dwyer/Omega CN9111A delivers maximum performance and stability for your application.
