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1/32, 1/16, and 1/8 DIN Universal Input High Accuracy Controllers

i-Series Temperature, Process and Strain Controllers

$646.29

Item# CNI833-EIT-DC-AL

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-9 $646.29
10-24 $613.98
25-49 $581.66
50-99 $549.35
100-499 $517.03
500+ $484.72

In stock

Lead Time (If not in stock): 6 weeks
i-Series Temperature, Process and Strain Controllers CNI833-EIT-DC-AL CNI833-EIT-DC-AL
  • Universal Inputs
  • Accuracy at 25°C: ±0.5°C temp nominal 0.03% rdg ±0.03% range process and strain
  • Totally Programmable Color Displays (Visual Alarms)
  • User-Friendly, Simple to Configure

CNI833-EIT-DC-AL Model Options

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Edit these specs to order a different model. Not all combinations are valid. Options compatible with previous selections will be in bold.

*Highlighted options are not compatible. Please select a different combination.

Measurement Type
Control Outputs
Form Factor
Input Type
Communications
Supply Voltage Type
Ramp And Soak
Display Type
Additional Feature
Output Type
Number Of Inputs


*Move on up to our newest line of PID Controller, the CNPT Platinum Series controllers with Modbus connectivity, expanded ramp and soak programs, universal inputs, and simple PC programming.*

The OMEGA™ iSeries is a family of microprocessor-based instruments offered in three true DIN sizes with NEMA 4 (IP65) rated front bezels. All of the instruments share the same set-up and configuration menu and method of operation, a tremendous time saver for integration of a large system. The iSeries family includes extremely accurate digital panel meters "DPi" and single loop PID controllers "CNi" that are simple to configure and use, while providing tremendous versatility and a wealth of powerful features.

The CNi Series covers a broad selection of transducer and transmitter inputs with 2 input models.

The universal temperature and process instrument (CNi models) handles 10 common types of thermocouples, multiple RTDs and several process (DC) voltage and current ranges. This model also features built-in excitation, 24 Vdc @ 25 mA. With its wide choice of signal inputs, this model is an excellent choice for measuring or controlling temperature with a thermocouple, RTD, or 4 to 20 mA transmitter.

The strain and process instruments (CNiS models) measure inputs from load cells, pressure transducers, and most any strain gage sensor as well as process voltage and current ranges. The CNiS has built-in 5 or 10 Vdc excitation for bridge transducers, 5 Vdc @ 40 mA or 10 Vdc @ 60 mA (any excitation voltage between 5 and 24 Vdc is available by special order). This CNiS model supports 4- and 6-wire bridge communications, ratiometric measurements. The CNiS features fast and easy "in process" calibration/ scaling of the signal inputs to any engineering units. This model also features 10-point linearization which allows the user to linearize the signal input from extremely nonlinear transducers of all kinds.

Programmable Color Display
The iSeries are 1/8, 1/16 and 1/32 DIN controllers featuring the big iSeries color-changing display. The digits are twice the size of typical 1/8 DIN panel meters. The iSeries meters feature the only LED displays that can be programmed to change color between GREEN, AMBER, and RED.

Embedded Internet and Serial Communications
Featuring optional "embedded Internet" (specify "-EIT" option) the iSeries are the first instruments of their kind that connect directly to an Ethernet network and transmit data in standard TCP/ IP packets, or even serve Web pages over a LAN or the Internet. The iSeries are also available with serial communications. With the "-C24" option, the user can select from the pushbutton menu between RS232, RS422, and RS485, with straightforward ASCII commands. If Modbus is required, we recommend our latest Platinum controllers - CNPT Series.


SPECIFICATIONS

Universal Temperature and Process Input (DPi/CNi Models)
Accuracy: Accuracy at 25°C: 0.5°C (±0.9°F) temp nominal, 0.03% Rdg ±0.03% range process and strain
Resolution: 1°/0.1° 10 µV process
Temperature Stability:
    RTD: 0.04°C/°C
    TC @ 25°C (77°F): 0.05°C/°C
    Cold Junction Compensation
    Process: 50 ppm/°C
NMRR: 60 dB
CMRR: 120 dB
A/D Conversion: Dual slope
Reading Rate: 3 samples/s
Digital Filter: Programmable
Display: 4-digit 9-segment LED 10.2 mm (0.40"); DPi/CNi32, DPi/CNi16, DPi/CNi16D, DPi/CNi8DV 21 mm (0.83"); DPi/CNi8 10.2 mm (0.40") and 21 mm (0.83"); DPi/CNi8DH RED, GREEN, and AMBER programmable colors for process variable, setpoint and temperature units
Input Types: Thermocouple, RTD, analog voltage, analog current
Thermocouple Lead Resistance: 100 Ω max
Thermocouple Types (ITS 90): J, K, T, E, R, S, B, C, N, L (J DIN)
RTD Input (ITS 68): 100/500/1000 Ω Pt sensor, 2-, 3- or 4-wire; 0.00385 or 0.00392 curve
Voltage Input: 0 to 100 mV, 0 to 1V, 0 to 10 Vdc
Input Impedance: 10 MΩ for 100 mV 1 MΩ for 1 or 10 Vdc
Current Input: 0 to 20 mA (5 Ω load)
Configuration: Single-ended
Polarity: Unipolar
Step Response: 0.7 sec for 99.9%
Decimal Selection:
    Temperature: None, 0.1
    Process: None, 0.1, 0.01 or 0.001
Setpoint Adjustment: -1999 to 9999 counts
Span Adjustment: 0.001 to 9999 counts
Offset Adjustment: -1999 to 9999
Excitation (Not Included with
Communication): 24 Vdc @ 25 mA (not available for low-power option)

Universal Strain and Process Input (DPiS/CNiS Models)
Accuracy: 0.03% reading
Resolution: 10/1µV
Temperature Stability: 50 ppm/°C
NMRR: 60 dB
CMRR: 120 dB
A/D Conversion: Dual slope
Reading Rate: 3 samples/s
Digital Filter: Programmable
Input Types: Analog voltage and current
Voltage Input: 0 to 100 mVdc, -100 mVdc to 1 Vdc, 0 to 10 Vdc
Input Impedance: 10 MΩ for 100 mV; 1 MΩ for 1V or 10 Vdc
Current Input: 0 to 20 mA (5 Ω load)
Linearization Points: Up to 10
Configuration: Single-ended
Polarity: Unipolar
Step Response: 0.7 sec for 99.9%
Decimal Selection: None, 0.1, 0.01 or 0.001
Setpoint Adjustment: -1999 to 9999 counts
Span Adjustment: 0.001 to 9999 counts
Offset Adjustment: -1999 to 9999
Excitation (Optional In Place Of Communication): 5 Vdc @ 40 mA; 10 Vdc @ 60 mA

Control
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 panel

Control Output 1 and 2
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
SSR: 20 to 265 Vac @ 0.05 to 0.5 A (resistive load); continuous
DC Pulse: Non-isolated; 10 Vdc @ 20 mA
Analog Output (Output 1 Only): Non-isolated, proportional 0 to 10 Vdc or 0 to 20 mA; 500 Ω max
Output 3 Retransmission
    Isolated Analog Voltage and Current
    Current: 10 V max @ 20 mA output
    Voltage: 20 mA max for 0 to 10 V output

Network and Communications
Ethernet: Standards compliance IEEE 802.3 10 Base-T
Supported Protocols: TCP/IP, ARP
RS232/RS422/RS485: Selectable from menu; both ASCII and Modbus protocol selectable from menu; programmable 300 to 19.2 Kb; complete programmable setup capability; program to transmit current display, alarm status, min/max, actual measured input value and status
RS485: Addressable from 0 to 199
Connection: Screw terminals

Alarm 1 and 2 (Programmable)
Type: Same as output 1 and 2
Operation: High/low, above/below, band, latch/unlatch, normally open/ normally closed and process/deviation; front panel configurations
Analog Output (Programmable): Non-isolated, retransmission 0 to 10 Vdc or 0 to 20 mA, 500 Ω max (output 1 only); accuracy is ±1% of FS when following conditions are satisfied: input is not scaled below 1% of input FS, analog output is not scaled below 3% of output FS

General
Power: 90 to 240 Vac ±10%, 50 to 400 Hz*, 110 to 375 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

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
Environmental Conditions:
    All Models: 0 to 55°C (32 to 131°F) 90% RH non-condensing
    Dual Display Models: 0 to 50°C (32 to 122°F), 90% RH non-condensing (for UL only)
Protection:
    DPi/CNi/DPiS/CNiS32, 16, 16D, 8C: NEMA 4X/Type 4 (IP65) front bezel
    DPi/CNi8, 8DH, 8DV: NEMA 1/Type 1 front bezel
    Approvals: UL, C-UL, CE per EN61010- 1:2001
Dimensions
    DPi/CNi8 Series: 48 H x 96 W x 127 mm D (1.89 x 3.78 x 5")
    DPi/CNi16 Series: 48 H x 48 W x 127 mm D (1.89 x 1.89 x 5")
    DPi/CNi32 Series: 25.4 H x 48 W x 127 mm D (1.0 x 1.89 x 5")
Panel Cutout
    DPi/CNi8 Series: 45 H x 92 mm W (1.772 x 3.622"), 1.8 DIN
    DPi/CNi16 Series: 45 mm (1.772") square, 1.16 DIN
    DPi/CNi32 Series: 22.5 H x 45 mm W (0.886 x 1.772"), 1.32 DIN
Weight
    DPi/CNi8 Series: 295 g (0.65 lb)
    DPi/CNi16 Series: 159 g (0.35 lb)
    DPi/CNi32 Series: 127 g (0.28 lb)
* No CE compliance above 60 Hz.
** Units can be powered safely with 24 Vac power, but no certification for CE/UL are claimed.


THERMOCOUPLE CHART
Universal Temperature / Process
Input Type
Range
Accuracy
Process Voltage
0 to 100 mV, 0 to 1 V, 0 to 10 Vdc
0.03% Rdg ±0.03% range
Process Current
0 to 20 mA (4 to 20 mA)
0.03% Rdg ±0.03% range
Excitation
24 V @ 25 mA
J
Iron-Constantan
-210 to 760°C / -346 to 1400°F
0.4°C / 0.7°F
K
CHROMEGA™-ALOMEGA™
-270 to -160°C / -160 to 1372°C
-454 to -256°F / -256 to 2502°F
1.0°C / 0.4°C
1.8°F / 0.7°F
T
Copper-Constantan
-270 to -190°C / -190 to 400°C
-454 to -310°F / -310 to 752°F
1.0°C / 0.4°C
1.8°F / 0.7°F
E
CHROMEGA™-Constantan
-270 to -220°C / -220 to 1000°C
-454 to -364°F / -364 to 1832°F
1.0°C / 0.4°C
1.8°F / 0.7°F
R
Pt/13%Rh-Pt
-50 to 40°C / 40 to 1768°C
-58 to 104°F / 104 to 3214°F
1.0°C / 0.5°C
1.8°F / 0.9°F
S
Pt/10%Rh-Pt
-50 to 100°C / 100 to 1768°C
-58 to 212°F / 212 to 3214°F
1.0°C / 0.5°C
1.8°F / 0.9°F
B
30%Rh-Pt/6%Rh-Pt
100 to 640°C / 640 to 1820°C
212 to 1184°F / 1184 to 3308°F
1.0°C / 0.5°C
1.8°F / 0.9°F
C
5%Re-W/26%Re-W
0 to 2320°C / 32 to 4208°F
0.4°C / 0.7°F
N
Nicrosil-Nisil
-250 to -100°C / -100 to 1300°C
-418 to -148°F / -148 to 2372°F
1.0°C / 0.4°C
1.8°F / 0.7°F
L
J DIN
-200 to 900°C / -328 to 1652°F
0.4°C / 0.7°F
RTD
Pt, 0.00385, 100, 500, 1000 ohm
-200 to 900°C / -328 to 1652°F
0.4°C / 0.7°F
RTD
Pt, 0.00392, 100, 500, 1000 ohm
-200 to 850°C / -328 to 1562°F
0.4°C / 0.7°F

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loading all reviews
Rated 1 out of 5 by from Very compicated setup **Review of the CNi3253-DC Temperature Controller** I recently purchased the CNi3253-DC temperature controller for use with geophysical equipment, but my experience has been far from satisfactory. The device itself has potential, but its functionality is severely hampered by a combination of a complicated setup process and inadequate documentation. **Setup Challenges:** From the outset, configuring the CNi3253-DC proved to be a frustrating endeavor. The setup process is far from intuitive, and despite following the manual as closely as possible, I encountered numerous hurdles. The menus are convoluted, and the instructions provided do not align well with the actual options available on the controller. This discrepancy between the manual and the device’s menu options is a major issue, making it difficult to configure the controller correctly. Also I was unable to find how to reset the controller to factory defaults. **Documentation Issues:** The manuals available for the CNi3253-DC are, frankly, disappointing. They are poorly written and lack essential details. Many of the menu options are either described inadequately or not mentioned at all. This oversight leaves users like myself guessing about the functionality of certain features and how to use them effectively. The lack of clear, comprehensive documentation significantly impairs the usability of the controller. **Performance Concerns:** Despite my efforts to get the controller working, I have yet to achieve satisfactory performance. The misalignment between the described functions and the actual options means that I cannot reliably control or monitor the temperature as needed for my geophysical equipment. This has led to operational delays and has compromised the effectiveness of my setup. **Conclusion:** Overall, the CNi3253-DC temperature controller falls short of expectations due to its complex setup process and inadequate documentation. If you’re considering this controller, be prepared for a steep learning curve and significant frustration. The potential of the device is overshadowed by its usability issues, and unless improvements are made to the user manual and interface, I would recommend exploring alternative options for temperature control in critical applications.
Date published: 2024-07-27
Rated 2 out of 5 by from MORE BUTTONS LABELED The unit needs more controls and they need to be labeled clearly in writing not stupid tiny symbols. Works good but it should not be so difficult to set up.
Date published: 2020-10-23
Rated 3 out of 5 by from I wish returns were easier The products work great and as expected. But we received one part that was the incorrect part; which is understandable, it happens, no big deal. But getting Omega to process a return and more importantly get us the correct part replaced was not as easy as we would have liked.
Date published: 2024-04-04
Rated 5 out of 5 by from Great little meter Great little meter and can handle years of dust and abuse!
Date published: 2023-08-30
Rated 5 out of 5 by from CNi3244-C24 controller Fantastic controller. Very long lasting. Purchased several more of these for our needs.
Date published: 2023-06-07
Rated 5 out of 5 by from Good service Provided the customer with what they needed at fair prices and with prompt service.
Date published: 2023-05-19
Rated 4 out of 5 by from Great product to replace CN77 series units We used this to replace CN77 series units. Same form factor. Very similar communication protocol. One downside for us is that APOn function is missing for Alarm 2 which we have to use for our application. The other downside of course is the price ...
Date published: 2022-09-08
Rated 5 out of 5 by from Great timer, great price. Very helpful timer. Great price and perfect fitting.
Date published: 2022-08-06
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loading all QA

What is the current resolution (mA) for the DPi32?

Asked by: bochia
The ma resolution would depend on the maximum current being measured. If you were to measure up to 999.9 ma you would have 0.1 resolution and if measuring up to 99.99 ma 0.01 would be your resolution.
Answered by: ANBENG
Date published: 2019-12-05

Do the ethernet-enabled controllers support API? I received the M3397 manual with the commands and functions but wanted to know if there was an API?

Asked by: SG347
Hi SG347, Thank you for the inquiry. We do not offer an API for the iSeries ethernet version. Best regards OMEGA
Answered by: NorwalkAE_RS
Date published: 2023-06-18

I have a CNi-1653-C24. How do I tell which Output options it has? Serial Number is 8150096

Asked by: DKHarris
Hi DKHarris, Model# determines outputs. In this case "53" indicates analog output and a relay output. "C24" indicates RS232 or RS485 output. Best regards OMEGA
Answered by: NorwalkAE_RS
Date published: 2020-11-18

I am successfully reading and changing settings on a CNi 1644 over RS232. I am using PID output. I would like to read what the output is. If it is turning on relays 75% of the time, I'd like to read a 75 somewhere.

Asked by: C in Pittsburgh
Thank you for your inquiry. Please contact our Temperature Team to discuss or email us at temp@omega.com
Answered by: Application Engineer JB
Date published: 2021-07-27

Besides the alarm, what are the differences between CNi16D33-AL and CNi16D33? I don't see the dimensions or specs online.

Asked by: Kim27
Thank you for your inquiry Kim27. The only difference is that CNi16D33-AL is a PID controller with an alarm and CNi16D33 doesn't have an alarm. Here is the link to the spec sheet: https://assets.omega.com/spec/CNI-Series_spec.pdf
Answered by: Application Engineer SP
Date published: 2022-02-10

I have purchased 6 of these meters (CNI*33-EIT) and have them ready to be programmed. Reading all of the service information leaves me a little confused on how to actually program them with my laptop, Do I use a rs485 to rs232 adaptor or rs485

Asked by: catman
Hi Catman, This model has ethernet output only. You can connect to PC via ethernet. Best regards OMEGA
Answered by: AENorwalk
Date published: 2020-03-17

Does the CNI16D33-EIT have two outputs suitable for operating a low power DC tape heater and Peltier cooler? Will a Peltier cooler function properly the PID loop?

Asked by: Jackem
Thank you for your inquiry. You can operate devices at 30 Vdc @ 3 Amps (Both MAXIMUM Value) using PID Control
Answered by: ENGINEER CB
Date published: 2021-10-20

Thanks. I tried your link, but M3397 does not exist on the page, nor does M339. I was at https://www.omega.com/en-us/pdf-manuals. The letters "comm" appear four times, none of which were the right manual. Could you make sure it's available externally?

Asked by: C in Pittsburgh
Hi C in Pittsburgh, Please try the following; https://assets.omega.com/manuals/M3397.pdf Best regards OMEGA
Answered by: AENorwalk
Date published: 2023-02-23

Will the SPDT relays be able to directly control a 240V and/or 120V heat tape?

Asked by: trist
The i series relays are rated to switch 120 to 240 VAC 3 Amps.
Answered by: Applications Engineer ANB
Date published: 2023-08-17

What wire size range should be used for the input connections? I looked but cannot find it anywhere in your documentation.

Asked by: Mark Roberson
The 8 pin connector (for power and outputs) can have a wire size from 22 to 12 gage. The 10 pin connector (for inputs) can have a wire size from 28 to 16 gage. Thanks for connecting with Omega!
Answered by: Jane
Date published: 2019-04-30
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