CR0020 - Controller IFM - Free user manual and instructions
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| Product Type | Controller |
| Brand | IFM |
| Model | CR0020 |
| Dimensions (H x W x D) | 96 mm x 96 mm x 60 mm |
| Weight | Approx. 150 g |
| Power Supply | 24 V DC (10-30 V DC) |
| Display Type | 4-digit LED, 7-segment |
| Input Type | Pt100, Pt1000, thermocouple (K, J, S) |
| Output Type | 2 relay outputs (SPST, 250 VAC / 5 A) |
| Control Mode | PID, ON/OFF, manual mode |
| Communication | RS485 (Modbus RTU) |
| Protection Rating | IP65 (front panel) |
| Mounting Type | Panel mount (cutout 92x92 mm) |
| Operating Temperature | -20°C to +60°C |
| Storage Temperature | -30°C to +80°C |
| Humidity Range | 10% to 90% RH (non-condensing) |
| Cleaning Instructions | Wipe with a dry, soft cloth; avoid solvents |
| Safety Features | ESD protection, overvoltage protection |
| Spare Parts Availability | Contact IFM service for replacement parts |
Frequently Asked Questions - CR0020 IFM
How do I configure the CR0020 controller for a PT100 sensor?
Access the configuration menu by pressing and holding the SET button for 3 seconds. Navigate to the input type parameter and select 'Pt100'. Refer to the manual for detailed steps on sensor selection and calibration.
What is the maximum relay switching capacity?
Each relay output is rated for 250 VAC at 5 A (resistive load). For inductive loads, derate to 2 A and use an RC snubber circuit.
Can I use the CR0020 with a thermocouple type K?
Yes, the CR0020 supports thermocouple types K, J, and S. Set the input type accordingly in the configuration menu. Ensure proper cold junction compensation for accurate readings.
How do I reset the controller to factory defaults?
Press and hold the SET and UP buttons simultaneously for 5 seconds while powering on the device. The display will show 'rES' to confirm reset. This restores all parameters to factory settings.
What does the ERR LED indicate?
The ERR LED flashes when there is a sensor error (e.g., open circuit or short). Check sensor wiring and replace the sensor if needed. The controller can be configured to output a default value on error.
Is the CR0020 compatible with Modbus RTU?
Yes, the controller has an RS485 interface supporting Modbus RTU protocol. Use the parameters to set baud rate (9.6-115.2 kbps), data bits, and parity. The default device ID is 1.
How do I calibrate the input?
Connect a precision resistor (according to the sensor type) to the input. Enter the calibration mode via the menu, and adjust the offset or gain using the arrow keys. Refer to the calibration section of the manual for exact values.
What is the power consumption?
The controller consumes typically 3 W (max 5 W). Use a power supply providing 24 V DC with at least 0.5 A capacity. It is reverse polarity protected.
Can I mount the controller in a wet environment?
The front panel is rated IP65, suitable for splashproof applications. The rear housing is IP20, so the back should be placed in a dry enclosure. Ensure the sealing gasket is properly installed.
How do I update the firmware?
Firmware updates are performed via the RS485 interface using IFM's software tool. Connect the controller to a PC with a USB-RS485 converter and follow the instructions in the firmware update section of the manual.
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USER MANUAL CR0020 IFM
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Product information
Brand : IFM
Model : CR0020
Category : Controller