16 AC inputs

The official Schneider identity is 16 inputs at 24 V AC.

Quantum rack module

Selection must match the existing Quantum rack, terminal wiring and project map.

Lifecycle planning

The model is discontinued; the stated functional replacement requires engineered migration.

140DAI34000 is a Modicon Quantum discrete input module with sixteen 24 V AC inputs. The AC rating is the key selection point: a similar-looking 24 V DC input module is not an electrical substitute for existing AC field circuits.

Schneider lists this product as discontinued and identifies BMXDAI1602 as a functional replacement. That recommendation does not make it a drop-in Quantum replacement; migration requires a compatible platform, new engineering, wiring and project changes.

Purchase verification

Send the full 140DAI34000 label, rack and processor model, terminal and field-voltage photos, input map and project backup. We will verify that the requirement is 24 V AC and review the replacement path.

AC proximity and limit devices

Monitors compatible 24 V AC discrete field states.

Legacy Quantum racks

Restores sixteen configured input points in an existing system.

Maintenance shutdowns

Supports planned replacement after terminal and address documentation.

Migration assessment

Provides the starting identity for evaluating a modern platform replacement.

Confirm the 24 V AC marking and terminal wiring

Photograph the 140DAI34000 front label, terminal strip, rack slot and processor. Include the field-power source and common wiring so AC versus DC selection is unambiguous.

Can I replace 140DAI34000 with a 24 V DC input module?

No. Schneider identifies 140DAI34000 as a 16-point 24 V AC input module. Verify the measured field voltage and terminal diagram; AC and DC input circuits are not interchangeable.

Is BMXDAI1602 a plug-in replacement for 140DAI34000?

No. Schneider lists it as a functional replacement, not a drop-in Quantum module. The newer platform requires migration planning for rack, wiring, addressing, project software and commissioning.

What should I record before removing 140DAI34000?

Record the complete nameplate, rack and slot, every terminal and common, field-voltage source, input-address map, forcing status and project backup. Photograph the installed module before disturbing wiring.

Why might new 140DAI34000 inputs stay off after replacement?

Check the 24 V AC source, common wiring, terminal seating, rack power, slot configuration and input map. Do not troubleshoot it as a DC module or assume the front LED proves the field circuit is complete.

How should I plan for 140DAI34000 lifecycle status?

Decide whether the priority is an exact verified spare or a designed migration. Maintain a tested project backup and wiring record, and treat published lifecycle dates as a reason to plan-not as proof that any substitute fits.

What details help confirm a correct 140DAI34000 quote?

Provide front and side labels, quantity, destination, rack/CPU model, field voltage, terminal photos and whether an exact spare or migration option is required. These details reduce AC/DC and platform mismatches.

Need a verified 140DAI34000 for an installed system?

Share the full nameplate, installed configuration, clear connector or terminal photos, quantity and destination. Myrtle will review model identity, compatibility and delivery requirements before quotation.