iJS - Controller Carel - Free user manual and instructions
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| Product Type | Controller |
| Brand | Carel |
| Model | iJS |
| Dimensions | 150 x 120 x 50 mm (panel cutout: 138 x 108 mm) |
| Weight | 0.3 kg |
| Power Supply | 24 V AC/DC ±10%, 50/60 Hz |
| Display | Backlit LCD, 4 lines x 20 characters |
| Inputs | 4 analog inputs (NTC, 0-10V, 4-20mA), 4 digital inputs |
| Outputs | 4 relay outputs (2A @ 250V AC), 2 analog outputs (0-10V) |
| Communication | RS485 (Modbus RTU), USB (for programming) |
| Programming | Via front keypad or USB with Carel software |
| Mounting | Panel mount with gasket |
| Protection Rating | IP65 (front panel), IP20 (rear) |
| Operating Temperature | 0 to 50°C |
| Operating Humidity | 10-90% RH (non-condensing) |
| Certifications | CE, UL, cUL |
| Main Functions | Temperature & humidity control, defrost cycles, alarm management, data logging, real-time clock |
| Maintenance | Clean front with soft dry cloth; periodically check wiring and terminal tightness |
| Safety Features | Overvoltage protection (internal varistor), short-circuit protection on outputs |
| Spare Parts & Repairability | Available from Carel distributors; repair service via authorized centers; firmware updates downloadable |
| General Information | User manual in PDF format available online; supports multiple languages |
Frequently Asked Questions - iJS Carel
What is the power supply requirement for the Carel iJS controller?
The Carel iJS controller requires a power supply of 24 V AC/DC ±10%, 50/60 Hz. Ensure the supply is stable and within this range to avoid damage.
How do I connect the iJS controller to a Modbus network?
Use the RS485 terminals on the controller. Connect A+ to A+, B- to B-, and common GND. Set the Modbus address via the keypad or software. Terminate the bus with 120Ω resistors on the last devices.
Can I program the iJS controller without a computer?
Yes, you can program it using the front keypad and display. However, for advanced configurations and parameter backup, it's recommended to use Carel's programming software via USB.
What types of sensors can be connected to the analog inputs?
The analog inputs support NTC thermistors, 0-10 V signals, and 4-20 mA current loops. Configure the input type in the controller settings.
How do I perform a factory reset on the iJS?
Go to the system menu, select 'Factory Reset' and confirm. Alternatively, power off, press and hold the 'UP' and 'DOWN' keys, then power on until 'RESET' appears.
What is the IP rating of the iJS controller?
The front panel is rated IP65 when properly mounted with the included gasket. The rear side is IP20.
How can I update the firmware of the iJS?
Download the latest firmware from the Carel website. Transfer it via USB using Carel's programming tool. Follow the instructions in the manual.
What should I do if the controller displays an alarm?
Check the alarm code on the display. Consult the manual for the specific code. Common causes include sensor faults, communication errors, or over-temperature.
Is the iJS controller suitable for outdoor installation?
It is designed for indoor panel mounting. For outdoor use, it must be installed in an enclosure that protects it from direct weather exposure.
Where can I find spare parts for the iJS?
Spare parts are available through Carel authorized distributors. Contact your local Carel representative or visit the Carel website for a list of distributors.
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USER MANUAL iJS Carel
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Product information
Brand : Carel
Model : iJS
Category : Controller