1. Introduction
This manual provides essential information for the safe and effective use of your CAREL Temperature Controller. These controllers are designed for precise temperature management in various industrial and commercial applications, including HVAC and refrigeration systems. Please read this manual thoroughly before installation, operation, or maintenance.
2. Safety & Warnings
Important Safety Information:
Read all instructions before use. Failure to follow these instructions may result in damage to the product or personal injury.
- Keep the device and its cord out of reach of children under 3 years old.
- Keep away from children unless supervised by an adult.
- Do not use this product for purposes other than its intended use.
- Inspect the product before each use; do not use if damaged.
- Follow installation and operation guidelines to avoid injury.
- Do not expose to water or moisture.
- Handle with care to avoid cuts or injuries.
3. Product Overview
The CAREL Temperature Controller series offers robust solutions for various control needs. Below is an overview of the product and its components.
3.1 Product Video Overview
Overview video showing various CAREL temperature controllers, their components, and packaging.
3.2 Product Images and Key Features

Front view of the CAREL 10T50 temperature controller, displaying its model number, serial number, revision, and manufacturing date. The wiring diagram shows connections for 230V power, NTC probes, and various outputs (8A 2FLA, 12A 1FLA, 10A 1FLA). The device has an IP65 rating.

Top view of the CAREL 10T50 temperature controller, featuring its digital display and control buttons: 'Prg/mute', 'clear', 'Set', and up/down arrows for navigation and adjustment.

Front view of the CAREL IR33B7HR20 temperature controller, showing its model number, serial number, revision, and manufacturing date. The detailed wiring diagram includes connections for 230V power, digital outputs (DO1, DO2), analog outputs (AO1, AO2), and digital inputs. The device is rated IP65.

Front view of the CAREL IR33A7LR20 temperature controller, displaying its model number, serial number, revision, and manufacturing date. The wiring diagram illustrates connections for 115-230 Vac power supply, SSR outputs, 10 Vdc outputs, NTC probes, and digital inputs. It also has an IP65 rating.

Back view of the CAREL IR00UGC300 controller, showing various connection terminals for power (12-24V), outputs (OUT1, OUT2), and inputs. The label indicates its model, serial number, revision, and manufacturing date.

Front view of a CAREL MPXPRO series controller, featuring a digital display and control buttons: 'Prg/mute', 'aux', 'Set', 'def', and up/down arrows for parameter adjustment.
4. Specifications
4.1 General Specifications
| Feature | Description |
|---|---|
| Brand | CAREL |
| Product Type | Temperature Controller / PLC Module |
| Origin | Mainland China |
| High-concerned chemical | None |
| Protection Rating | IP65 (for models 10T50, IR33B7HR20, IR33A7LR20) |
| Power Supply (Example) | 230V (for 10T50, IR33B7HR20), 115-230 Vac (for IR33A7LR20), 12-24V (for IR00UGC300) |
| Outputs (Example) | Relay outputs (e.g., 8A, 12A, 10A), Digital Outputs (DO), Analog Outputs (AO), SSR outputs |
| Inputs (Example) | NTC probes, Digital Inputs |
4.2 Product Models
- PYBU1R0536
- PZBUC0H011K (Available in Black)
- PYDY1Z014B
- PZDYY0H001K (Available in White)
- IR33B7HR20
- IR33A7LR20
- IR00UGC300
- 10T50
- MPXPRO Series
4.3 Package Dimensions and Weight
- Length: 15 cm
- Width: 15 cm
- Height: 10 cm
- Weight: 0.5 kg
5. Installation
Proper installation is crucial for the safe and reliable operation of your CAREL Temperature Controller. Always ensure power is disconnected before beginning any installation work.
5.1 Mounting
These controllers are typically designed for panel mounting. Ensure adequate space for ventilation and access to wiring terminals.
5.2 Wiring Diagrams
Refer to the specific wiring diagram for your model. The following images provide examples of wiring configurations for different CAREL controller models. Always consult the label on your specific device for the exact wiring instructions.

Wiring diagram for CAREL 10T50 model, showing 230V power, NTC probes, and output connections. Use copper conductors only.

Wiring diagram for CAREL IR33B7HR20 model, detailing 230V power, digital outputs (DO), analog outputs (AO), and digital inputs.

Wiring diagram for CAREL IR33A7LR20 model, showing 115-230 Vac power, SSR outputs, 10 Vdc outputs, NTC probes, and digital inputs.

Back view of CAREL IR00UGC300 controller, illustrating various connection terminals for power and I/O.
6. Operation
The CAREL Temperature Controllers typically feature a digital display and several buttons for configuration and monitoring. While specific functions may vary by model, the general operation principles are similar.
6.1 Basic Controls
- Prg / Mute: Used to enter programming mode or mute alarms.
- Set: Used to confirm selections or enter setpoint adjustment mode.
- Up / Down Arrows: Used to navigate menus, adjust values, or view different parameters.
- Clear: Used to clear values or exit a menu without saving changes.
- Aux / Def: Auxiliary or defrost function, depending on the model.
6.2 Initial Setup and Parameter Adjustment
- Power On: Ensure all wiring is correct and secure, then apply power to the controller.
- View Current Temperature: The display will typically show the current measured temperature.
- Access Setpoint: Press the 'Set' button to view or adjust the desired temperature setpoint. Use the up/down arrows to change the value, then press 'Set' again to confirm.
- Programming Mode: Press and hold 'Prg' (or 'Set' and 'Up' simultaneously on some models) to enter the programming menu. Refer to your specific model's detailed manual for parameter codes and their functions.
- Exit Programming: Exit programming mode by pressing 'Prg' or 'Clear' repeatedly until the display returns to normal operation, or wait for a timeout.
7. Maintenance
Regular maintenance ensures the longevity and optimal performance of your temperature controller.
- Cleaning: Keep the controller's display and buttons clean using a soft, dry cloth. Avoid abrasive cleaners or solvents.
- Inspection: Periodically check all wiring connections for tightness and signs of wear or corrosion.
- Environment: Ensure the operating environment is within the specified temperature and humidity ranges, and free from excessive dust or moisture.
8. Troubleshooting
If you encounter issues with your CAREL Temperature Controller, consider the following basic troubleshooting steps:
| Problem | Possible Cause & Solution |
|---|---|
| Controller not powering on | Check power supply connections. Ensure correct voltage is applied. Verify circuit breaker or fuse. |
| Incorrect temperature reading | Check sensor wiring and ensure it is correctly connected to the appropriate terminals. Verify sensor type and calibration settings. |
| Outputs not activating | Check setpoint and differential settings. Verify output wiring. Ensure the controller is not in a 'mute' or 'off' state. |
| Display shows error code | Refer to your specific model's detailed manual for a list of error codes and their meanings. |
If the problem persists after attempting these steps, please contact technical support.
9. User Tips
No specific user tips were available from customer reviews or Q&A for this product at this time.
10. Warranty & Support
For warranty information, technical support, or detailed product documentation, please contact the seller or the manufacturer directly. Always provide your product model and serial number when seeking support.
An additional generic user manual in PDF format may be available for reference: User Manual (PDF)





