Catalogue reference. Availability, exact specification and OEM or aftermarket supply are confirmed in your quotation.
A1S-X40 — Mitsubishi, Input Module
Sensors & automationPart number: A1S-X40
Mitsubishi Electric A1S-X40, also written A1SX40, is a MELSEC-AnS DC input module with 16 sink-type input points. It is rated for 12 V DC or 24 V DC and uses a 20-point terminal block with one common for the 16 inputs. Confirm the complete module number and system requirements before ordering.
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Technical specifications
| Manufacturer | Mitsubishi Electric |
|---|---|
| Part number | A1S-X40 |
| Category | Sensors & automation |
| Published component description | Mitsubishi, Input Module |
| Reference status | Published part reference; specification and fitment require confirmation |
| Availability | On request |
| Input type | DC sink type |
| Input points | 16 |
| Rated input voltage | 12 V DC or 24 V DC |
| Rated input current | Approximately 3 mA at 12 V DC; approximately 7 mA at 24 V DC |
| Input isolation | Photocoupler |
| Input impedance | Approximately 3.3 kΩ |
| Input response time | 10 ms or less, OFF to ON and ON to OFF |
| Common arrangement | 16 input points per common |
| External connection | 20-point terminal block |
Catalogue information may contain errors or be out of date. Full specifications and verified details are available on request. Confirm the part number and equipment fitment with us before ordering.
Product questions
How many inputs does the A1S-X40 have and what voltage do they use?
The A1S-X40, also identified as A1SX40, has 16 sink-type DC inputs rated for 12 V DC or 24 V DC. Rated input current is approximately 3 mA at 12 V and 7 mA at 24 V. These are nominal ratings, not a continuous operating-voltage range.
How are the inputs grouped and connected on the A1S-X40?
The A1SX40 uses one common for its 16 inputs and a 20-point terminal block. Check the module wiring diagram and the connected devices before installation; input type and polarity matter.
Is the A1S-X40 the same as the A1SX40-S1?
No. The unsuffixed A1SX40 is rated for 12 or 24 V DC, while the A1SX40-S1 is rated for 24 V DC and has different input response times. Check the complete model suffix on the existing module before ordering.
Can the A1S-X40 measure a varying voltage or a fast pulse?
It is a digital input module, not an analogue voltage-measuring input. Its specified input response is 10 ms or less in each direction; actual pulse-measurement performance also depends on the PLC and program. Confirm the complete system requirements before relying on it for timing.
Is the A1S-X40 a direct replacement for any PLC input module?
No universal interchangeability is established. Verify the complete module number, PLC and base-unit models, wiring and signal requirements. Provide the equipment model and serial number for a fitment check; suffix variants and migration alternatives can have different electrical or wiring requirements.
Researched on:
Research information may be outdated. Confirm fitment and specifications with our team before ordering.