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AL2-4EX
Mitsubishi AL2-4EX available at EU Automation. Get in touch today for a quick price.
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What happens next?
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
The Mitsubishi AL2-4EX is a compact Alpha2 series expansion module that adds 4 digital 24 V DC inputs to a compatible controller, making it a practical choice when additional input capacity is needed without replacing the main unit. Designed for use within Mitsubishi’s Alpha PLC systems, this I/O module helps extend control capability for small automation tasks such as monitoring switches, sensors and other field input signals.
Its slim format makes it well suited to installations where panel space is limited, while the 24 V DC input design supports straightforward integration into many industrial and building control applications. The AL2-4EX also offers 2 selectable high-speed counter inputs up to 1 kHz, giving extra flexibility for applications that require faster pulse detection. As part of the Alpha2 range, it is intended for simple, efficient expansion of existing control systems where reliable digital input handling is essential.
Its slim format makes it well suited to installations where panel space is limited, while the 24 V DC input design supports straightforward integration into many industrial and building control applications. The AL2-4EX also offers 2 selectable high-speed counter inputs up to 1 kHz, giving extra flexibility for applications that require faster pulse detection. As part of the Alpha2 range, it is intended for simple, efficient expansion of existing control systems where reliable digital input handling is essential.
| Specification | Description |
|---|---|
| Part number | AL2-4EX |
| Alternative part number | AL24EX |
| Manufacturer | Mitsubishi |
| Product category | PLC systems |
| Product family | Alpha |
| Product type | Expansion I/O module |
| Module function | Compact digital input extension module for expanding a Mitsubishi Alpha2 controller |
| Input configuration | 4 digital inputs |
| Input voltage | 24 V DC |
| Current type | DC |
| Occupied I/O points on PLC | 4 |
| High-speed input capability | Includes 2 selectable high-speed counters up to 1 kHz |
| Series | ALPHA2 Series |
| Dimensions (W x H x D) | 53.1 x 90 x 24.5 mm |
| Net weight | 0.05 kg |
| Country of origin | Japan |
| Commodity code | 85437090 |
| Compliance | RoHS compliant, CE compliant, UL/cUL compliant, UKCA compliant |
| WEEE category | B2B |
| Typical use | Suitable for adding extra 24 V DC digital input capacity to compatible Alpha2 control systems |
What does this expansion unit do?
This unit adds four extra digital input channels to a compatible ALPHA2 controller, making it a practical choice when the base unit does not provide enough 24V DC inputs for the application.
How many inputs are provided?
It provides 4 integrated digital inputs. The AL2-4EX is intended for straightforward input expansion where a small increase in input capacity is needed without moving to a larger controller.
What input voltage does it use?
This version is designed for 24V DC input signals. It should be selected for DC control panels and field devices that operate on 24V DC.
Can this unit be used for AC input signals?
No. This module is the DC input version, so it is intended for 24V DC signals rather than AC field inputs.
Which controller range is it designed for?
It is an extension unit for the Mitsubishi ALPHA2 range. It is used with compatible expandable ALPHA2 base units rather than as a standalone device.
Can it be used on every controller in the ALPHA2 range?
Not every model is suitable. This expansion style is intended for compatible expandable ALPHA2 controllers and is not used with AL2-10MR base units.
Does it offer any high-speed input capability?
Yes. This input expansion module includes 2 selectable high-speed counters with operation up to 1 kHz, which can be useful for counting pulses from suitable devices.
How much panel space does it require?
The unit is compact, with approximate dimensions of 53.1 mm wide, 90 mm high and 24.5 mm deep. That makes it suitable for installations where DIN rail space is limited.
How many controller I/O points does the module occupy?
It occupies 4 I/O points on the connected controller, matching the four added digital inputs.
Does the unit need a battery?
No. The module itself does not require a battery.
What compliance information is commonly checked for this unit?
Commonly referenced compliance details include CE, UL/cUL, UKCA and RoHS compliance, along with WEEE classification as B2B equipment.
What types of applications is this unit commonly used in?
It is commonly used where extra 24V DC input capacity is needed for devices such as push-buttons, selector switches, limit switches, proximity sensors, float switches and auxiliary contacts in compact automation panels.
- Expanding an Alpha2 controller with four additional 24V DC digital inputs when the base unit input count is no longer sufficient
- Bringing extra push-buttons, selector switches and operator commands into compact control panels
- Adding more limit switch and position sensor signals to small machine and mechanism control systems
- Increasing input capacity for pump, fan and motor control applications that need more field signal monitoring
- Connecting additional float switches, level contacts and pressure switches in water and fluid handling installations
- Extending lighting control panels to accept more switch, timer or occupancy-based input signals
- Integrating extra door, gate and shutter status signals into building and access control arrangements
- Monitoring additional alarm contacts, interlocks and permissive signals in simple automation duties
- Expanding HVAC and environmental control panels with more digital status inputs from field devices
- Adding more discrete feedback points for conveyors, handling equipment and basic process sequences
- Supporting greenhouse, agricultural and utility control systems that require more 24V DC sensor inputs
- Providing a straightforward input expansion option for retrofit projects using Mitsubishi Alpha series controllers
This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
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Customer reviews
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Alex Bailey is my main point of contact at EU Automation...he is extremely friendly, has exceptional customer service skills and always offers great pricing & lead times.
3 months ago
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Tom Higgins provided great prompt service. I contacted Tom by phone and within 10 minutes there was a quote in my in box. WOW Thank you Tom and Thank you EU Automation!
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Tom Higgins did a great job at getting…
Tom Higgins did a great job at getting us the part we needed. He saw a concern with the part a verified before shipping.
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Lessle Smith
Thomas Higgins has gone above and…
Thomas Higgins has gone above and beyond to make things happen for my facility. His customer service and knowledge were an asset in helping me with my order and the logistics challenges!
4 months ago
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