CNI8D-Series

1/8 DIN Horizontal and Vertical Dual Display PID Controllers

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Embedded Ethernet Connectivity (Optional)
Dual Display with Bright Color-Changing Feature
Programmable Digital Filter
2 Control or Alarm Outputs (Choice of DC Pulse, Solid State Relays, Mechanical Relays, Analog Voltage and Current)

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CNI8D-Series

From ^$ 617.54

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1 Variations available

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Data Sheet

Product Overview

A/D Conversion Dual Slope
Accuracy ± 0.5 °C (± 0.9 °F)
Accuracy Detail ± 0.5°C temp; 0.03% rdg
Additional Features 1 Dual Display Horizontal, Built-In Excitation, Front Removable
Approvals UL, C-UL, CE per 2014/35/EU
CMRR 120 dB
Control Characteristics Action: Reverse (heat) or direct (cool) Modes: Time and amplitude proportional control; selectable manual or auto PID, proportional, proportional with integral, proportional with derivative and anti-reset Windup, and on/off Rate: 0 to 399.9 s Reset: 0 to 3999 s Cycle Time: 1 to 199 s; set to 0 for on/off Gain: 0.5 to 100% of span; setpoints 1 or 2 Damping: 0000 to 0008 Soak: 00.00 to 99.59 (HH:MM), or OFF Ramp to Setpoint: 00.00 to 99.59 (HH:MM), or OFF Auto Tune: Operator initiated from front pane
Control Output SPDT Relay, Alarm
Cutout Dimensions 45 x 92 mm
Decimal Selection 0,001, 0,01, 0,1, None
Digital Filter Programmable
Display Size 46 mm (1.8 in)
Display Type 4 Digit LED
Display Type Note 4-digit 9-segment LED 10.2 mm (0.40"); i32, i16, i16D, i8DV 21 mm (0.83"); i8 10.2 mm (0.40") and 21 mm (0.83"); i8DH RED, GREEN, and AMBER programmable colors for process variable, setpoint and temperature units
Enclosure Ratings NEMA Type 1
Height 48 mm
Impedance Input 10 MΩ for 100 mV; 1 MΩ for 1V or 10 Vdc
Input Configuration Single-ended
Input Type Thermocouple, RTD, mA, Voltage
Input Voltage 0 to 100 mV, 0 to 1 Vdc, 0 to 10 Vdc
Isolation Power to Input/Output: 2300 Vac per 1 minute test For Low Voltage Power Option: 1500 Vac per 1 minute test Power to Relay/SSR Output: 2300 Vac per 1 minute test Relay/SSR to Relay/SSR Output: 2300 Vac per 1 minute test RS232/485 to Input/Output: 500 Vac per 1 minute test
Length 127 mm
Current, Max 0 to 20 mA (5 Ω load)
NMRR 60 dB
Number of Inputs 4
Offset Adjustment -1999 to 9999
Operating Temperature, Max 50 °C
Operating Temperature, Min 0 °C
Output Detail Relay/Relay;Relay: 250 Vac or 30 Vdc @ 3 A (resistive load); configurable for on/off, PID and ramp and soak Output 1: SPDT, can be configured as alarm 1 output Output 2: SPDT, can be configured as alarm 2 output Isolated Analog Voltage and Current Current: 10 V max @ 20 mA output Voltage: 20 mA max for 0 to 10 V output
Output Signal Current, Voltage
Polarity Unipolar
Resolution 1°/0.1°; 10 µV process
RTD Type 100/500/1000Ω Pt sensor; 2-, 3- or 4-wire; α=0.00385 or 0.00392
Sampling Rate 3 Hz (3 updates/second)
Series ID CNI8D-Series
Set Point Adjustment Menu Configurable
Span Adjustment 0.001 to 9999 counts
Step Response 0.7 sec for 99.9%
Supply Power Note 90 to 240 Vac ± 10%, 50 to 400 Hz*, 110 to 300 Vdc, equivalent voltage Low Voltage Power Option: 24 Vac**, 12 to 36 Vdc for DPi/CNi/DPiS/CNiS; 20 to 36 Vdc for dual display, ethernet and isolated analog output from qualified safety approved source
Supply Power Type AC
Supply Voltage 90 to 240 Vac
Temperature Stability RTD: 0.04°C/°C ;TC @ 25°C (77°F): 0.05°C/°C; Cold Junction Compensation; Process: 50 ppm/°C
Thermocouple Lead Resistance, Max 100 Ω
Thermocouple Type J, K, T, E, N, R, S, B, C, L
Weight 295 g
Width 96 mm

Supported Applications

The Omega CNI8D Series comprises 1/8 DIN horizontal and vertical dual display PID controllers designed for temperature, process, and strain control applications. These single-loop autotune controllers are engineered for industrial automation environments requiring precise regulation of thermocouple (TC), resistance temperature detector (RTD), analog voltage/current inputs, or strain measurements.

Documented application contexts include:

Temperature Control: Monitoring and regulating processes using TC (ITS90) types J, K, T, E, R, S, B, C, N, L and RTD (ITS88) sensors.
Process Variable Regulation: Managing analog voltage signals ranging from 0 to 100 mV, 0 to 1 V, or 0 to 10 Vdc, as well as current loops of 0 to 20 mA (4 to 20 mA).
Strain Measurement: Specific models support strain inputs with resolutions down to 1 μV.

Operating Conditions & Performance

The CNI8D Series operates within an ambient temperature range of 0 to 55°C (32 to 131°F) and supports storage temperatures from 0 to 50°C (32 to 122°F). Humidity tolerance is rated at 90% RH non-condensing. The controllers feature a response time of 0.7 sec for 99.9% settling.

Performance specifications vary by input type:

Accuracy (Temperature): ±0.5°C temp; ±0.03% rdg typical.
Resolution: 1°/0.1° for temperature inputs and 10 μV process resolution (with specific strain models offering 10/1 μV).
Stability: Temperature stability is documented as 0.04°C/°C RTD, 0.5°C/°C TC @ 25°C (77°F), and 50 ppm/°C for process inputs.

The series includes a programmable digital filter to manage signal noise in demanding environments.

Power Supply Options

Standard Line Voltage: 90 to 240 Vac ±10%, 50 to 400 Hz, or 110-375 Vdc (power consumption: 4W for single display; 5W for dual display).
Low Voltage Option: 20 to 36 Vdc or 24 Vac available via the "-DC" suffix.

Configuration Options

The CNI8D Series offers extensive configurability across housing orientation, output types, communication protocols, and display features. The controllers are designed for panel mounting with a front-removable design to facilitate maintenance without disconnecting rear wiring.

Housing & Dimensions

Horizontal (CNi8DH): 48 H x 96 W x 127 mm D (1.89 x 3.78 x 5").
Vertical (CNi8DV): 48 H x 48 W x 127 mm D (1.89 x 1.89 x 5").
Strain Models: Specific dimensions of 25.4 H x 48 W x 127 mm D (1.0 x 1.89 x 5") are available for strain applications.
Enclosure Ratings: NEMA 4X/Type 4 (IP65) front bezel or NEMA 1/Type 1 front bezel options depending on configuration.

Outputs & Alarms

The series supports two independent control or alarm outputs. Available output types include:

Mechanical Relay: Form "C" SPDT relays rated at 250 Vac @ 3 A Resistive Load.
Solid State Relays (SSR): DC pulse or 0.5 A SSR options.
Analog Output: Configurable for 0 to 10 Vdc or 0 to 20 mA current output.
Pulse Output: Pulsed 10 Vdc output available.

Communication & Connectivity

The controllers support embedded Ethernet connectivity (optional) with an embedded Web server. Additional communication options include:

Isolated RS232 and RS485/422 (300 to 19.2 Kb).
Ethernet combined with isolated RS485/422 hub for up to 31 devices.

Display Features

The dual display utilizes a programmable color-changing feature (green, amber, red) and includes a digital filter. The unit features plug/removable connectors with sturdy panel mounting sleeves and adjustable thumb nuts.

Key Product Differences

The CNI8D Series is differentiated by specific model suffixes that define functional capabilities:

-AL (Limit Alarm): Provides alarms only without PID control. Note: Analog output is not available with "-AL" units.
-SM (Simplified Menu): Offers on/off control or alarms, excluding full PID functionality. This option is not available on CNiS strain models.
-EIT: Adds Ethernet connectivity with an embedded Web server.
-C24: Provides isolated RS232 and RS485/422 communication (not compatible with excitation).
-C4EIT: Combines Ethernet with an embedded Web server plus an isolated RS485/422 hub.
-DC: Enables 20 to 36 Vdc or 24 Vac power supply (not compatible with excitation).

The series also supports factory setup and configuration (-FS) options. Excitation voltages of 5 V, 10 V, or 24 V are available for specific sensor types, subject to compatibility constraints noted in the ordering guide.

PDFs & Manuals

CNI8DH-CNI8DV_spec CNI8D-Series View More

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Compliance