Carel IR33 Panel Mount PID Temperature Controller 2 Input, 4 Output SSR 24V ac/dc Temperature Control

RS Stock No.:: 745-7970
Mfr. Part No.:: IR33A9MR20
Brand:: Carel

Carel IR33 Panel Mount PID Temperature Controller 2 Input, 4 Output SSR 24V ac/dc Temperature Control

Subtotal (1 unit)*

$495.65

(exc. GST)

$570.00

(inc. GST)

Spend over $80.00 ex GST for FREE delivery

Last RS stock

5 left, ready to ship from another location
Final 1 unit(s) shipping from 20 October 2026

Units	Per unit
1 +	$495.65

*price indicative

Alternative

This product is not currently available. Here is our alternative recommendation.

Carel DN33 DIN Rail On-Off Temperature Controller 2 Input, 4 Output Relay 30V dc Temperature Control

RS Stock No.: 809-1004

Each

$710.12

(exc. GST)

$816.64

(inc. GST)

RS Stock No.:: 745-7970
Mfr. Part No.:: IR33A9MR20
Brand:: Carel

Specifications

Technical data sheets

Legislation and Compliance

Product Details

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	Carel
	Product Type	PID Temperature Controller
	Output Type	SSR
	Number of Inputs	2
	Number of Outputs	4
	Maximum Current	8A
	Maximum Operating Temperature	60°C
	Minimum Operating Temperature	-10°C
	Control Type	Temperature Control
	Terminal Type	Plug-In
	Maximum Supply Voltage	24V ac/dc
	Firing Mode	PWM
	Digital Comms	RS485
	Display Type	Single Line
	Maximum Voltage	230V
	Standards/Approvals	CE
	Width	34.2mm
	IP Rating	IP65
	Length	76.2mm
	Series	IR33
	Mount Type	Panel Mount
	Input Type	Thermocouple, PT100, PT1000
	Panel Depth	94mm

	Select all
	Brand Carel
	Product Type PID Temperature Controller
	Output Type SSR
	Number of Inputs 2
	Number of Outputs 4
	Maximum Current 8A
	Maximum Operating Temperature 60°C
	Minimum Operating Temperature -10°C
	Control Type Temperature Control
	Terminal Type Plug-In
	Maximum Supply Voltage 24V ac/dc
	Firing Mode PWM
	Digital Comms RS485
	Display Type Single Line
	Maximum Voltage 230V
	Standards/Approvals CE
	Width 34.2mm
	IP Rating IP65
	Length 76.2mm
	Series IR33
	Mount Type Panel Mount
	Input Type Thermocouple, PT100, PT1000
	Panel Depth 94mm

COO (Country of Origin):: IT

The IR33A9MR20 model controller features 4 Solid State Relay outputs. These outputs are most suited to application solutions where one or more PWN outputs are required. In this instance relays become impractical and solid state relays can be used to manage processes according to the application requirement.

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