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CN7400-Series
1/16 DIN Universal Process Limit Controller with Illuminated Keys
This product series currently has an extended lead time. For a potential replacement, please see the CNPT-Series
- Dual Display
- FM-Approved Limit
- Universal Inputs
- Illuminated Keys
Product Overview
- Accuracy ± 0.25 %
- Accuracy Detail ±0.25% of span, ±1 least significant digit
- Additional Features 1 None
- Bezel Size 48 mm
- Cutout Dimensions 45 x 45 mm
- DIN Rail Size 0.0625 mm
- Display Size 7.62 mm (0.30 in)
- Display Type 4 Digit LED
- Display Type Note Two 4-digit, 7-segment, 7.62 mm H (0.3") LEDs
- Form factor 1/16 DIN
- Input Type Thermocouple, RTD, mA, Voltage
- Measuring Range Thermocouple Type K: -200 to 2500°F Type J: -100 to 1600°F Type T: -350 to 750°F Type E: -100 to 1800°F Type N: -100 to 2372°F Type R: 0 to 3200°F Type S: 0 to 3200°F Type B: 75 to 3308°F Type L(J DIN): -100 to 1600°F Type C: 0 to 4208°F RTD (2 wire) Pt100 RTD (0.00385): -200 to 875°C Pt100 RTD (0.00392): -200 to 875°C RTD, 120 Ω Nickel (0.00628): -80 to 320°C RTD, Pt1000 (0.00385): -200 to 875°C Process Current 0 to 20 mA, 4 to 20 mA: 1999 to 9999 Process Voltage 0 to 10Vdc, -10 to 10 Vdc, -10 to 10 mVdc: 1999 to 9999
- Memory Backup Non-Volatile
- Number of Inputs 1
- Operating Temperature, Max 55 °C
- Operating Temperature, Min -10 °C
- Output Detail Relay Control Output Ratings: Resistive: SPST, 3 A @ 240 Vac Inductive: 1.5 A @ 240 Vac
- Panel Depth 133 mm
- Panel Thickness 6.35 mm
- Power Consumption 5 VA
- Series ID CN7400-Series
- Supply Power Note 100 to 240 Vac, nominal, 10 to 15%, 50 to 400 Hz; single phase; 132 to 240 Vdc, nominal, 10 to 20% Selectable Input: 10 thermocouple, 4 RTD, DC voltage or DC current
- Supply Power Type AC
- Supply Voltage 100 to 240 Vac
- Temperature Sensor Type Thermocouple
- Weight 227 g
Supported Applications
The Omega CN7400 Series consists of FM-approved and UL Approved limit controllers designed for mounting in enclosed panels. These universal process limit controls support a wide range of input types, including thermocouples (K, J, T, E, N, R, S, B, L/J DIN, C), RTDs (Pt100 0.00385/0.00392, Pt1000, Nickel 120 Ω), and DC voltage or current signals. The series is engineered for applications requiring digital displays of the process variable (PV) and set value (SV), with configurable relay outputs to manage limit conditions.
Operating Conditions & Performance
The CN7400 Series operates within an ambient temperature range of -10 to 55°C (14 to 131°F). Measurement ranges vary by input type, spanning from -350 to 750°F (-212 to 398°C) for T Thermocouples up to 0 to 4208°F (-17 to 2320°C) for C Thermocouples. RTD inputs cover ranges such as -200 to 875°C (-328 to 1607°F). Scalable process input types (current and voltage) support a range of -1999 to 9999 with adjustable decimal point positions.
Accuracy is specified at ±0.25% of span, ±1 least significant digit. The display resolution defaults to 0.1°; however, if the temperature exceeds 999.9° or drops below -199.9°, the display returns to whole-degree resolution.
Physical and Electrical Specifications
- Housing Dimensions: Panel cut-out of 45 mm² (1.77 in²); bezel size is 48 mm² (1.9 in²) with a panel depth requirement of 133 mm (5.24").
- Weight: 227 g (8 oz).
- Power Supply: Standard models accept 100 to 240 Vac, nominal ±10%, 50 to 400 Hz; single phase. DC power options include 132 to 240 Vdc, nominal ±20%. A low voltage option (LV) supports 12 - 24 Vdc/Vac.
- Enclosure Rating: IP66 and UL type 4 when installed with proper spacing; closer than 19mm (0.75in) between instruments invalidates this rating.
Configuration Options
The series offers configurable output configurations to meet specific control logic needs. Standard outputs include SPST relays rated at 3 A @ 240 Vac (Resistive) or 1.5 A @ 240 Vac (Inductive). Outputs can be configured as Normally Open (Form "A") or Normally Closed (Form "B"). The controller allows Form "A" and Form "B" relays to be logically linked to emulate a Form "C" output.
Available Configurations
- Model CN7430: Single output with NO relay.
- Model CN7434: Dual output featuring both NO and NC relays.
- Analog Retransmission (-PV1): Adds a 0 to 20 mA isolated retransmission output for the process variable.
- Noise Suppression (CNQUENCHARC): Field-installable RC snubber accessory with 2 leads, rated for 110 to 230 Vac.
Key Product Differences
The primary distinction within the CN7400 Series lies in the output relay configuration. The CN7430 model provides a single Normally Open (NO) relay, while the CN7434 includes both NO and NC relays for dual-output applications. Both models support remote reset capability.
Input flexibility is inherent to all units in the series, accepting universal inputs across 10 thermocouple types, 4 RTD types, DC voltage, or DC current without requiring separate hardware variants for each sensor type; selection is managed via programming. The -PV1 option suffix differentiates models that include analog retransmission from those with relay-only outputs.
PDFs & Manuals
