CN7200-7500-7600-7800

Supported Applications

The Omega CN7200, CN7500, CN7600, and CN7800 series are Ramp/Soak temperature and process controllers designed for monitoring and controlling industrial processes. These units support universal inputs including thermocouples (Types K, J, T, E, N, R, S, B, L, U), Pt100 RTD sensors, DC voltage signals (0 to 50 mV, 0 to 5 V, 0 to 10 V), and DC current loops (0 to 20 mA*, 4 to 20 mA*). The series is engineered for applications requiring precise temperature regulation via ON/OFF or PID control methods with autotune capabilities.

Key functional features include support for up to 64 ramp/soak actions and the ability to manage dual-loop outputs. Configurations allow simultaneous heating and cooling, while specific models offer additional alarm functions selectable from 13 built-in types. RS485 communications enable integration into larger control networks.

Operating Conditions & Performance

All series members operate within an ambient temperature range of 0 to 50°C (32 to 122°F) and are powered by a universal supply of 100 to 240 Vac, 50/60 Hz. Measurement accuracy is specified as ±0.25% span, ±1 least significant digit across the supported input types.

Input ranges vary by sensor type:

• Thermocouples: Ranges include -200 to 1300°C (-328 to 2372°F) for Type K, N; -100 to 1200°C (-148 to 2192°F) for Type J; and up to 100 to 1800°C (212 to 3272°F) for Type B.
• RTD: Pt100 sensors support -200 to 600°C (-328 to 1112°F).
• Analog Signals: DC voltage and current inputs cover a display range of -999 to 9999.

The CN7500 and CN7800 series feature selectable resolution, with standard resolutions of 1.0 or 0.1 for thermocouples (except Types R, S, and B). The CN7600 and CN7200 models carry an IP66 enclosure rating.

Configuration Options

The series offers distinct form factors to accommodate different panel mounting requirements:

• CN7500 Series (1/32 DIN): Compact dimensions of 45 x 22.5 mm (1.772 x 0.886"). Weight: 114 g (4 oz).
• CN7800 Series (1/16 DIN): Front bezel 48 mm² (1.89 in²) with a panel cut-out of 45 mm² (1.77 in²). Weight: 114 g (4 oz).
• CN7200 Series (¼ DIN): Square bezel dimensions of 96 x 96 x 15.8 mm (3.78 x 3.78 x 0.625"). Weight: 425 g (15 oz).
• CN7600 Series: Rectangular dimensions of 92 x 46 mm (3.60 x 1.8"). Weight: 425 g (15 oz).

Dual control outputs are standard across the series, with configurations including DC pulse/relay, relay/relay, current output/relay, and linear voltage/relay.

• Relay Outputs: SPST or SPDT contacts rated at 5 A @ 250 Vac resistive (control) or 3 A @ 250 Vac resistive (alarm).
• Voltage Pulse Output: 14 V, 10 to -20% (max 40 mA).
• Current Output: 4 to 20 mA.
• Linear Voltage Output: 0 to 5 V or 0 to 10 Vdc.

RS485 MODBUS® communication is standard, supporting up to 247 addresses with transmission speeds from 2400 to 38,400 bps. The second output can be reconfigured as an alarm on select models, and the CN7600 supports up to three additional alarm outputs.

Key Product Differences

The series is differentiated primarily by physical size (DIN footprint) and specific output configurations:

• CN7500 & CN7800 Series: Designed for compact installations. The CN7800 includes 2 alarms standard, while the CN7500 features dual-loop control with a second output configurable as an alarm.
• CN7600 Series: Offers versatility with up to three additional alarm outputs and IP66 protection in a rectangular housing. Models include options for DC pulse/relay (CN7623), relay/relay (CN7633), 4-20 mA/relay (CN7653), or linear voltage/relay (CN7663).
• CN7200 Series: A square ¼ DIN format with IP66 rating. Available in DC pulse/relay (CN7223), relay/relay (CN7233), current/relay (CN7253), and linear voltage/relay (CN7263) configurations.

All models require an external 250 Ω precision shunt resistor (OMX-R250, sold separately) for specific input types. Field-installable accessories include the CNQUENCHARC noise suppression RC snubber and the CN7-485-USB-1 RS485 to USB mini-node converter.