What Is the 140DAO84000?
The Schneider 140DAO84000 is a 16-point discrete AC output module from the Modicon Quantum series. It uses Triac (bidirectional thyristor) switching rather than mechanical relays, so there are no contact points to wear out. Each of the 16 points is individually isolated, which protects the backplane and limits the cost of a single-point fault to one channel instead of the whole card.
Because this module is discontinued (End of Sale, last verified 2026-09), sourcing strategy matters more than list price. A failed output card can idle a production line for days while a replacement is located. Oil AutoTech keeps practical, ready-to-ship spares for oil, gas and industrial automation applications, and our team helps you confirm the exact configuration before you commit budget.
Technical Specifications That Drive Cost
Triac Outputs Reduce Maintenance Spend
The 140DAO84000 switches 20 to 253 V AC with a 3 A rms per output rating at 200-230 V, or 4 A rms per output at 24-115 V. Module total is 16 A rms, with 4 A rms per 4-point group continuous. Triac switching means no relay contacts to pit or replace, so long-run maintenance cost drops compared with relay-based output cards.
Individual Isolation Protects the Whole Rack
Sixteen-channel individual isolation keeps a field fault from propagating across outputs. In practice, one shorted solenoid costs you one channel, not a full module and the downtime that follows. That isolation is a direct insurance policy on your process availability.
Diagnostics Cut Troubleshooting Hours
LED indication for blown fuse and loss of field power lets a technician identify the fault at the rack instead of tracing wiring in the field. Faster diagnosis means fewer billable maintenance hours per incident.
Backplane Load and Panel Space
The module draws 350 mA at 5 V DC from the backplane and consumes 1.85 W plus (1.1 V × total load current). It needs one slot, measuring 250 × 40.34 × 103.85 mm and weighing 0.485 kg. One slot per 16 points keeps rack space free for other I/O, which lowers cabinet cost per point.
Response Time
Off-on response runs 0.75 to 4.9 ms, and on-off runs 7.3 to 12.3 ms. That is fast enough for most discrete AC actuation duties without paying for a specialty high-speed card.
Where the 140DAO84000 Fits
Oil and gas valve and pump control. AC solenoids and motor starters on skids often run at 24-115 V AC or 200-230 V AC. The 20 to 253 V AC range covers both without a separate interface card, simplifying the bill of materials.
Water and wastewater plants. Triac outputs suit frequent switching of AC actuators where relay replacement cost would otherwise accumulate year after year.
Legacy Quantum rack upgrades. Plants still running Modicon Quantum need drop-in replacements when an output card fails. Because the product is discontinued, buying from a specialist with fast dispatch, worldwide beats waiting on a long lead time from a general distributor.
Installation and Setup
The 140DAO84000 occupies one slot in a Modicon Quantum rack and takes its 5 V DC supply from the backplane. Confirm rack power budget before adding the card, since bus current is 350 mA at 5 V DC. Keep the IP20 rating in mind: the module belongs inside a protected enclosure, away from moisture and conductive dust. Verify field wiring voltage against the 20 to 253 V AC range and group loading against the 4 A rms per 4-point group limit before energizing.
Maintenance and Reliability
Triac outputs have no moving contacts, so the main wear points sit outside the module: fuses, field wiring and connected loads. Use the blown-fuse and loss-of-field-power LEDs as your first diagnostic step during scheduled inspections. Because replacement units are no longer in production, hold at least one spare on the shelf. The carrying cost of a spare is small next to the cost of an unplanned line stop.
Selection Guide
Before ordering, confirm the part number 140DAO84000, the Modicon Quantum rack it will sit in, and the AC voltage and current of your field devices. Check that your total module load stays within 16 A rms and that each 4-point group stays within 4 A rms continuous. If you are unsure, our team provides hands-on technical selection help. Contact Oil AutoTech today for pricing and availability.
Frequently Asked Questions
Is the 140DAO84000 still in production?
No. Schneider lists it as discontinued (End of Sale), last verified 2026-09. Availability depends on remaining stock, so confirm with Oil AutoTech before planning a shutdown.
Can I use it at 24 V AC and 230 V AC on the same module?
Yes. The output voltage range is 20 to 253 V AC, but the current rating changes with voltage: 4 A rms per output at 24-115 V and 3 A rms per output at 200-230 V.
What do the diagnostic LEDs tell me?
They indicate a blown fuse and loss of field power, which speeds up fault finding at the rack.
How much rack space does it need?
One slot. Dimensions are 250 × 40.34 × 103.85 mm and weight is 0.485 kg.
