The OMEGA CN375-JC is a 1/16 DIN high-limit controller that monitors temperature inputs and de-energizes a normally energized SPDT latching relay when the process variable exceeds a user-selected setpoint. This design provides fail-safe over-temperature protection without programming. Manual reset via front-panel pushbutton restores the output relay. The controller accepts multiple sensor types—J, K, R, and S thermocouples plus 3-wire Pt100 RTD—making it adaptable across diverse thermal monitoring requirements. Digital LED display shows temperature in 1°C or 1°F resolution. Accuracy is ±1.5% FS + 1 digit for thermocouple inputs and ±1% FS + 1 digit for RTD inputs. The fixed deadband spans 1.5 to 2.5% FS, preventing relay chatter near setpoint. Output relay rating is 240 Vac at 2.5 A resistive or 1 A inductive load.
## Technical Specifications
• **Input Types:** J, K, R, S Thermocouples; 3-Wire RTD (Pt100)
• **Temperature Ranges:** Type J (0–399°C / 0–799°F), Type K (–18–537°C / 0–999°F), Type R (0–2999°F), Type S (0–1699°C), RTD (0–399°C / 0–799°F)
• **Accuracy:** Thermocouple ±1.5% FS + 1 digit; RTD ±1% FS + 1 digit
• **Resolution:** 1°C or 1°F
• **Output Relay:** SPDT latching mechanical, 240 Vac, 2.5 A (resistive) / 1 A (inductive)
• **Deadband/Hysteresis:** 1.5–2.5% FS (fixed)
• **Power Supply:** 110/230 Vac ±10%, 50/60 Hz
• **Power Consumption:** ~3 VA
• **Input Impedance:** 200 kΩ (thermocouple); 100 Ω max lead resistance (thermocouple), 2 Ω max per lead (RTD)
## Key Features
• High-limit shut-off control with fail-safe normally energized configuration
• No programming required—setpoint adjustment via user-accessible controls
• Manual front-panel pushbutton reset
• Compact 1/16 DIN form factor for panel-mount installation
• Digital LED display for real-time temperature readout
• Multi-sensor compatibility eliminates need for separate controllers
## Typical Applications
• Environmental chambers
• Industrial furnaces and ovens
• Packaging machinery thermal protection
• Process equipment over-temperature safeguards
## Compatibility & Integration
Sensor types: Type J, K, R, S thermocouples and Pt100 RTD. Operating environment: 0–50°C ambient, 90% RH non-condensing. Panel mounting with standard 1/16 DIN footprint.
