Carel IR33-DN33 Universale Panel Mount PID Temperature Controller 4 Input, 4 Output Relay 230V ac On-Off

RS Stock No.:: 783-4702
Mfr. Part No.:: IR33Z7HR20
Brand:: Carel

Carel IR33-DN33 Universale Panel Mount PID Temperature Controller 4 Input, 4 Output Relay 230V ac On-Off

Subtotal (1 unit)*

£177.78

(exc. VAT)

£213.34

(inc. VAT)

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In Stock

18 unit(s) ready to ship
Plus 4 unit(s) ready to ship from another location
Plus 28 unit(s) shipping from 18 May 2026

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Units	Per unit
1 +	£177.78

*price indicative

RS Stock No.:: 783-4702
Mfr. Part No.:: IR33Z7HR20
Brand:: Carel

Specifications

Technical Reference

Legislation and Compliance

Product Details

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	Carel
	Output Type	Relay
	Product Type	PID Temperature Controller
	Number of Inputs	4
	Number of Outputs	4
	Minimum Operating Temperature	-50°C
	Maximum Operating Temperature	150°C
	Control Type	On-Off
	Terminal Type	Plug-In
	Maximum Supply Voltage	230V ac
	Digital Comms	RS485
	Display Type	Single Line
	Maximum Voltage	250V
	Length	76.2mm
	IP Rating	IP65
	Width	71mm
	Standards/Approvals	EN60730-1, UL 873
	Mount Type	Panel Mount
	Input Type	Temperature Input: NTC -50 to 90 °C, TC J/K (-100 to 800 °C), PTC (-50 to 150 °C), PT1000, NTC, -50 to 110 °C, 4 to 20 mA, -10 to 150 °C, 0 to 5 V, 0 to 20 mA, 0 to 1 V, 0 to 10 V, -0.5 to 1.3 V
	Series	IR33-DN33 Universale
	Panel Depth	94mm

	Select all
	Brand Carel
	Output Type Relay
	Product Type PID Temperature Controller
	Number of Inputs 4
	Number of Outputs 4
	Minimum Operating Temperature -50°C
	Maximum Operating Temperature 150°C
	Control Type On-Off
	Terminal Type Plug-In
	Maximum Supply Voltage 230V ac
	Digital Comms RS485
	Display Type Single Line
	Maximum Voltage 250V
	Length 76.2mm
	IP Rating IP65
	Width 71mm
	Standards/Approvals EN60730-1, UL 873
	Mount Type Panel Mount
	Input Type Temperature Input: NTC -50 to 90 °C, TC J/K (-100 to 800 °C), PTC (-50 to 150 °C), PT1000, NTC, -50 to 110 °C, 4 to 20 mA, -10 to 150 °C, 0 to 5 V, 0 to 20 mA, 0 to 1 V, 0 to 10 V, -0.5 to 1.3 V
	Series IR33-DN33 Universale
	Panel Depth 94mm

COO (Country of Origin):: IT

The IR33Z7HR20 model controller features 4 relay outputs for controlling the minimum on or off times of a single or multiple outputs to protect loads. This protection avoids control swings for more consistent and reliable functionality.

The IR33Z7HR20 also features the standard on/off functionality for more versatile and application specific compatibility.

Optional Expansion

Suitable for use with remote controls, the IR33 series can use an infrared remote control allowing access to all main functions as well for configuring system parameters. This allows easy set up and use of all IR33 controllers from a distance.

Find the IRTRUES000 IR33 Remote Control here: 745-7999>

Programming keys are a simple and effective way to quickly program controllers both when on and also when not connected to a power supply. This disconnected programming function can reduce the risk of errors in the controller. A programming key allows for fast and effective technical service and can be used in just a few seconds for ease.

Find the IROPZKEY00 Programming Key Here: 745-8002

IR33 Universal Electronic Controllers

The IR33 series of universal electronic controllers from Carel are a panel mounted controller offering an updated and upgraded module to replace its IR32 predecessor. The IR33 series controllers feature two independent control loops and now with the addition of auto tuning and a real-time clock for cycle and alarm management, the IR33 range of controllers fare suitable for a range of applications.

Featuring a simple user interface with a clear LED screen and large control buttons, the controllers are easy to commission as well as coming in a standard 76.2 x 34.2mm size suitable for a 71 x 29mm panel cut out. Powered from 12 to 24 V ac/dc or by 115-230 V ac the units can also be used with transformers to for powering low voltage controllers from 110 V ac or 230 V ac.

All of the IR33 series controllers are capability of network connectivity for both monitoring and programming purposes to make the IR33 controllers truly versatile. Using the optional RS-485 series interface you can content any of the SSR, Relay or Relay/Analogue units for complete ease of use.

Auto Tuning

Auto tuning within the controller gives vital accuracy during configuration. The auto tune function uses rule based calculations typically used by experienced engineers to configure the controller either at the set-point or whist the load is being heated from an ambient temperature.

Supplied with a default factory setting, the PID parameters allow standard control and functionality but are not optimised for the system the IR33 will control. Auto-tuning the controller is used to fine-tune the 3 control parameters involved to ensure the controller is optimised for any application.

Real-time Clock

The addition of a real-time clock (RTC) to the IR33 series aids in the management of working cycles within the controller as well as to support logging alarms. The RTC in the controller is a low power resource for accurate time keeping freeing up system power for accurate monitoring and control.

Working cycles controlled by the IR33 can rely on the internal clock for accuracy with the ability to remain time keeping even when the main system power source is off or unavailable.

Real-time clocks are key to accuracy within time based controllers and should not be confused with hardware clocks governing digital information. Real-time clocks, unlike hardware clocks count in human time units for relative control.

Features and Benefits

• Temperature input or universal input

• Relay or SSR output versions

• 2 independent control loops

• Auto-tuning PID control

• Real-time clock

• Infrared receiver and buzzer

• Plug-in terminals

• Remote Control option

• Programming key compatibility