1/4 DIN Temperature Controllers with Autotune, Alarms and RS485
1/4 DIN Temperature Controllers
Volume discounts available
Volume Discount Schedule
| Quantity | Price each |
|---|---|
| 1-9 | $145.93 |
| 10-24 | $138.63 |
| 25-49 | $131.34 |
| 50-99 | $124.04 |
| 100-499 | $116.74 |
| 500+ | $109.45 |
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- Dual Display
- Autotune
- RS-485 Communications
- Free Software
- Alarm Functions
- Thermocouple/ RTD Inputs
- Output Status
CN733 Model Options
View all modelsEdit 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.
Output Type
Measurement Type
Control Outputs
Form Factor
Number of Inputs
Input Type
Communications
Supply Voltage Type
Display Type
| Input Types | Range |
|---|---|
| Pt100Ω RTD | 0 to 100°C (32 to 212°F) -20 to 500°C (-4 to 932°F) -200 to 600°C (-328 to 1112°F) |
| B Thermocouple | 100 to 1800°C (212 to 3272°F) |
| S Thermocouple | 0 to 1700°C (32 to 3092°F) |
| R Thermocouple | 0 to 1700°C (32 to 3092°F) |
| N Thermocouple | -200 to 1300°C (-328 to 2372°F) |
| E Thermocouple | 0 to 600°C (32 to 1112°F) |
| T Thermocouple | -20 to 400°C (-4 to 752°F) -200 to 400°C (-328 to 752°F) |
| J Thermocouple | -20 to 400°C (-4 to 752°F) -100 to 850°C (-148 to 1562°F) |
| K Thermocouple | -200 to 1300°C (-328 to 2372°F) -200 to 500°C (-328 to 932°F) |
| L Thermocouple | -200 to 500°C (-328 to 932°F) |
| U Thermocouple | -200 to 800°C (-328 to 1472°F) |
SPECIFICATIONS
Inputs: Thermocouple or RTD, see chart
Display: Two 4-digit, 7-segment, LEDs
Resolution: 1 degree
PV: Red, 19 mm (0.75') H
SV: Green, 12.7 mm (0.5') H
Accuracy: ±0.25% span, ±1 least significant digit
Supply Voltage: 100 to 240 Vac, 50/60 Hz
Power Consumption: 5 VA max
Operating Temperature: 0 to 50°C (32 to 122°F)
Memory Backup: Nonvolatile memory
Control Output Ratings:
Relay: SPST, 5A @ Vac resistive
Voltage Pulse: 14V, 10 to -20% (max 40 mA)
Current: 4 to 20 mA
Communication: RS-485 MODBUSR communication protocol
Panel Cutout: ¼DIN, 92 mm square (3.622 square')
Dimensions: 96 x 96 x 15.8 mm bezel (3.78 x 3.78 x 0.625')
Panel Depth: 79.2 mm (3.125')
Weight: 425 g (15 oz)
Front Panel Rating: IP66
Rated 4 out of
5
by
Project Engineer from
Decent little controller
These little controllers come with a good array of features for the price. However, the mounting clips they come with are cheap, easily broken, and very difficult to get replacements without ordering a whole new controller.
Date published: 2016-09-02
Rated 5 out of
5
by
Trevor H from
Great Temp Controller
Controller was easy to install and program. It’s operation is simple and efficient. Very good quality build. I will use this brand for process controllers moving forward.
Date published: 2020-05-20
CE Approved
UL cULus Listed
Is the relay electromechanical or solid state? Is the relay enclosed?
The CN733 has one Relay: SPST, 5A @ 250 Vac resistive. Thanks for connecting with Omega. Please contact our Tech Support with any further questions.
Date published: 2019-05-15
For the Current Output option, when the controller is tuned correctly, is the 4-20mA output altered to maintain the setpoint or is it just a constant pulse?
Thank you for your inquiry DJ92. A 4-20 mA output changes depending on how close or far away you are from the setpoint. Therefore, a 4-20 mA is not a constant pulse.
Date published: 2021-03-29
I can no longer enter auto tune. When I get to the AT selection, I can't select ON. Is there some way to restore auto tune functionality?
Hi Anonymous,
Please check that you are in PID mode and not in the Program mode for ramp soak.
Best regards
OMEGA
Date published: 2021-03-27
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