Product Overview
When a discrete output module fails on a running line, every hour of downtime costs money. The 140DAO84220 from Schneider Electric is a Modicon Quantum 16-point AC Triac output module built for low-voltage AC switching in demanding industrial control panels. It drives 16 discrete outputs arranged as 4 groups of 4, using bidirectional thyristor (Triac) switching for AC loads from 20 to 56 V AC.
This module is discontinued (End of Sale), so availability now depends on specialist stock. Oil AutoTech helps maintenance teams locate hard-to-find Quantum spares when they need them.
Technical Specifications
| Parameter | Value |
|---|---|
| Channels | 16 points (4 groups × 4) |
| Signal type | AC output, Triac (bidirectional thyristor) |
| Voltage range | 20 to 56 V AC |
| Output current | 4 A rms per output; 16 A rms per module; 4 A rms per group |
| Isolation | Group-to-group isolation |
| Diagnostics | Blown fuse, loss of field power (LED indication) |
| Response time | 0.5 ms typical (zero-crossing triac) |
| Supply voltage | 5 V DC (backplane) |
| Bus current | 350 mA @ 5 V DC |
| Power consumption | 1.85 W + (1.1 V × total load current) |
| Protection rating | IP20 |
| Dimensions (H×W×D) | 250 × 40.34 × 103.85 mm |
| Weight | 0.3 kg |
| Slots required | 1 |
What These Ratings Mean on the Floor
The 4 A rms per output rating lets one point switch a reasonably sized AC load directly, while the 16 A rms module limit caps total simultaneous load. Group-to-group isolation reduces cross-talk between output groups, which matters when mixing inductive and resistive loads in one panel. The 0.5 ms zero-crossing response keeps switching electrically quiet, limiting inrush stress on AC devices.
Installation and Setup
The 140DAO84220 occupies one slot in a Modicon Quantum backplane and draws 5 V DC at 350 mA from the rack supply. Confirm total backplane loading before adding the module. Wire outputs by group, respect the 4 A rms per group limit, and verify field power polarity before energizing. The IP20 rating suits clean, protected enclosures only.
Maintenance and Reliability
From a service perspective, the built-in blown-fuse and loss-of-field-power LEDs are the fastest diagnostic path. During routine panel checks, confirm all 16 output LEDs respond to commanded states and inspect field wiring terminations for heat discoloration. Keep spare fuses and a spare module on the shelf: for a discontinued part, a ready-to-ship spare is the cheapest insurance against extended downtime.
Compatibility and Integration
This module belongs to the Modicon Quantum platform and communicates over the Quantum backplane. It is not a fieldbus device itself, so network integration is handled by the rack’s communication modules. When replacing an existing unit, match the exact model number, since other Quantum output modules differ in voltage range and current rating.
Selection Guide
Before ordering, verify your application voltage falls within 20 to 56 V AC, confirm per-group and total current demands, and check that your rack has a free slot and adequate 5 V DC capacity. Please verify current lifecycle status and availability with Oil AutoTech before ordering. Contact Oil AutoTech today for pricing and availability.
Frequently Asked Questions
Is the 140DAO84220 still in production?
No. Schneider Electric lists this module as discontinued (End of Sale). Availability depends on remaining stock, so confirm with Oil AutoTech before planning a replacement.
What load voltage does this module switch?
It switches AC loads from 20 to 56 V AC using Triac outputs, with 4 A rms per output and 4 A rms per group.
How many slots does it need?
One slot in a Modicon Quantum backplane, drawing 350 mA at 5 V DC.
What diagnostics does it provide?
LED indication for blown fuse and loss of field power, which speeds up fault finding during maintenance.
Can I mix it with other Quantum output modules?
Yes, within the same rack, provided backplane power and slot limits allow. Match the model number exactly when replacing.
