Overview
The Omega CN74030 is a microprocessor-based process controller housed in a compact 1/32 DIN form factor, ideal for space-constrained panel installations. This temperature controller is part of Omega’s CN740 series and delivers reliable performance in industrial process control applications requiring precise monitoring and setpoint management.
Key Features
- Dual 4-digit LED displays showing process variable (red) and setpoint (green) simultaneously
- Support for thermocouple and RTD sensor inputs with wide range compatibility
- Auto-tuning capability automatically calculates optimal PID parameters
- Flexible control outputs including relay, DC pulse, and 4–20 mA current options
- Two alarm outputs with 12 preprogrammed alarm functions
- RS-485 MODBUS communication protocol for system integration
Technical Specifications
- Input Types: Thermocouple (J, K, T, E, R, S, N, L, U, Txk), RTD
- Display: Dual 4-digit 7-segment LEDs, 6.35 mm high (red PV, green SV)
- Accuracy: ±0.25% span ±1 least significant digit
- Supply Voltage: 100–240 Vac, 50/60 Hz
- Power Consumption: 5 VA max
- Operating Temperature: 0 to 50°C
- Control Outputs: Relay (SPST, 5 A @ 250 Vac resistive), 14 Vdc pulse (±10–20%), 4–20 mA current
- Panel Cut-Out: 45 mm square
- Maximum Panel Thickness: 9.50 mm
- Front Panel Rating: IP66
- Weight: 114 g
- Memory Backup: Nonvolatile memory
- Communication: RS-485 MODBUS
Typical Applications
- Temperature monitoring and control in laboratory and industrial furnaces
- Process heating and cooling systems
- Oven and chamber temperature regulation
- Thermoplastic processing equipment
- Thermal test chambers and environmental enclosures
Compatibility & Replacements
Compatible With
- Thermocouple sensor types (J, K, T, E, R, S, N, L, U, Txk)
- RTD temperature sensors
- Relay switching systems and solid-state relays
- 4–20 mA data acquisition and SCADA systems
- MODBUS RTU networks and industrial control systems
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator or Omega technical support before ordering as a direct replacement for other controller models.
Works With
- RS-485 MODBUS RTU protocol
- Industrial SCADA and data acquisition platforms
- Process automation and supervisory control systems
- Thermocouple and RTD sensor networks
