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140DRA84000
140DRA84000
140DRA84000

Schneider 140DRA84000 Quantum 16-Point Relay Output Module

  • Model: 140DRA84000
  • Brand: Schneider Electric
  • Series: Modicon Quantum
  • Product Type: Discrete relay output module
  • Number of Outputs: 16
  • Output Type: Normally open (N.O.) relay contacts
  • Output Configuration: Individually isolated outputs
  • Maximum Output Current: 2 A per point
  • Switching Range: 20–250 VAC / 5–150 VDC
  • Bus Current: 1,100 mA
  • Typical Application: Switching AC or DC field loads from a Quantum PLC
  • Lifecycle: Discontinued; Schneider lists end-of-service as December 31, 2030 on its U.S. page.
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Description

Key Technical Specifications

Parameter Specification
Product Range Modicon Quantum
Model 140DRA84000
Product Type Discrete relay output module
Output Channels 16
Relay Contact 1 N.O. contact per channel
Output Isolation Individual channel isolation
AC Switching Range 20–250 VAC
DC Switching Range 5–150 VDC
Maximum Continuous Load 2 A per point
Contact Type Normally open
Switching Capacity 500 VA
Surge Capability 10 A for 10 ms
Mechanical Life 10,000,000 cycles
Electrical Life Application-dependent
Output Overvoltage Protection Internal varistor
Channel-to-Channel Isolation 1780 Vrms AC, 1 minute
Channel-to-Bus Isolation 1780 Vrms AC, 1 minute / 2500 VDC, 1 minute
Bus Current Requirement 1,100 mA
Power Dissipation 5.5 W + 0.5 W × number of active points
Status Indication Bus active and external fault LEDs; individual output LEDs
Module Format Standard Quantum module
Operating Temperature 0–60 °C
Storage Temperature −40–85 °C
Relative Humidity 95%, non-condensing
Maximum Altitude 5,000 m
Certifications FM Class 1 Division 2, GOST, C-Tick, ABS
Standards UL 508, CSA C22.2 No. 142

Schneider’s Quantum catalog specifies the 140DRA84000 as a 16-channel N.O. relay output module, with 2 A per point and a 1,100 mA backplane current requirement.

 

Product Introduction

The Schneider Electric 140DRA84000 is a 16-channel relay output module for the Modicon Quantum PLC platform. Unlike transistor-based Quantum output modules, it uses electromechanical relay contacts, allowing the same module to switch a broad range of AC and DC field voltages.

Each channel provides a normally open relay contact and is individually isolated. The specified switching range is 20–250 VAC or 5–150 VDC, with a maximum load of 2 A per output.

This makes the module useful for applications involving contactors, solenoids, interposing relays, annunciators, and other discrete loads where relay isolation is required.

Important Lifecycle Note

Schneider’s regional lifecycle records are not completely consistent. The U.S. page states that the 140DRA84000 was discontinued on December 31, 2022, while the UK page currently shows discontinuation on December 31, 2030. Both list December 31, 2030 as the end-of-service date.

For procurement, therefore, verify lifecycle status for the destination market rather than relying on a single regional date.

Schneider identifies BMXDRA0815 as the recommended X80 replacement: an 8-channel normally open relay output module.

Important: BMXDRA0815 has only 8 outputs, versus 16 on the 140DRA84000. It should therefore be treated as a migration/replacement option, not assumed to be a direct one-for-one hardware substitute.

140DRA84000

140DRA84000

140DRA84000

140DRA84000

Installation & Configuration Guide

Stage 1: Pre-Installation Preparation

⚠️ Safety First: The 140DRA84000 can switch hazardous AC voltages. Follow the plant’s lockout/tagout procedure and verify the field circuits are de-energized before disconnecting the module.

Before replacement:

  1. Confirm the exact part number: 140DRA84000.
  2. Record the Quantum rack and slot.
  3. Photograph the module identification label.
  4. Photograph the 40-pin field terminal arrangement.
  5. Identify all 16 output circuits.
  6. Record the voltage and load type for each channel.
  7. Identify any external fuses or interposing relays.
  8. Back up the PLC application.
  9. Record the existing output states where practical.
  10. Verify that the replacement relay ratings are suitable for every connected load.

Stage 2: Removing the Existing Module

  1. Place the controlled process in its approved safe state.
  2. Isolate all relevant control and field power.
  3. Verify absence of voltage with an appropriate meter.
  4. Label every field conductor.
  5. Photograph the terminal assembly.
  6. Disconnect the field wiring.
  7. Release the Quantum module retaining mechanism.
  8. Remove the 140DRA84000 from the backplane.
  9. Inspect the backplane connector.
  10. Inspect the field terminal assembly for heat damage, loose screws, or discoloration.

⚠️ Do not assume the PLC being stopped makes the output terminals safe. Relay outputs may be switching independently supplied AC or DC circuits.

Stage 3: Installing the Replacement

  1. Use appropriate ESD protection.
  2. Verify the replacement part number.
  3. Confirm the correct Quantum rack and slot.
  4. Insert the module into the backplane.
  5. Ensure it is completely seated.
  6. Secure the module.
  7. Reconnect the field terminal assembly.
  8. Verify each conductor against the wiring diagram.
  9. Confirm field voltage for each output group/circuit.
  10. Check that no conductor is loose or exposed.

Installation Checklist:

  • 140DRA84000 verified
  • Correct Quantum rack
  • Correct slot
  • 16 output circuits identified
  • AC/DC voltage verified
  • Load current checked
  • Terminal wiring verified
  • Module fully seated
  • Field terminal secured

Stage 4: Commissioning & Output Testing

  1. Perform a final wiring inspection.
  2. Restore control power.
  3. Confirm the Quantum CPU recognizes the module.
  4. Verify module status indications.
  5. Place the PLC in the approved commissioning state.
  6. Test each output individually where process conditions permit.
  7. Confirm the corresponding relay operates.
  8. Verify the physical field device responds correctly.
  9. Check for unexpected output activation.
  10. Test representative AC and DC loads if both are used.
  11. Monitor for abnormal relay heating or repeated switching.
  12. Return the process to normal operation after successful testing.

 

Relay Output Selection Considerations

The 140DRA84000’s 2 A per-point rating should not be treated as a universal 2 A rating for every load type.

Inductive loads deserve particular attention. Solenoid valves, contactor coils, motors, and similar loads can produce substantial transient energy when switched.

Before connecting an inductive load, verify:

  • Coil voltage
  • Steady-state current
  • Inrush current
  • AC or DC operation
  • Load power factor
  • Required suppression
  • Switching frequency
  • Expected relay life

The published specifications include different electrical-life figures for different load categories, which is why relay-life calculations should be based on the actual load rather than the headline 2 A rating.

 

Frequently Asked Questions

What is the Schneider 140DRA84000?

The 140DRA84000 is a 16-channel discrete relay output module for the Modicon Quantum PLC platform. It provides normally open relay contacts for switching AC and DC field loads.

How many outputs does the 140DRA84000 have?

It provides 16 independent relay output channels. Schneider’s catalog specifies one N.O. contact per output.

What voltage can the 140DRA84000 switch?

The published specification gives a switching range of approximately 20–250 VAC and 5–150 VDC, with a maximum load of 2 A per point.

Are the 140DRA84000 outputs isolated?

Yes. The module provides individual relay contacts, with published isolation specifications of 1780 Vrms AC for one minute between channels and between channels and the bus.

Is the 140DRA84000 a transistor output module?

No. It is a relay output module. This distinction matters because relay outputs have mechanical contacts, switching-life limitations, and different behavior with inductive loads.

What is the difference between 140DRA84000 and 140DAO84000?

The 140DRA84000 uses relay contacts, while the 140DAO84000 is an AC discrete output module. The 140DAO84000 provides 16 isolated AC outputs, whereas the 140DRA84000 provides 16 N.O. relay outputs that can switch both AC and DC within their specified ranges.

Do not substitute between them without checking the electrical load and control architecture.

What is the recommended replacement for 140DRA84000?

Schneider Electric identifies BMXDRA0815 as the recommended replacement. It is an X80 module with 8 normally open isolated relay outputs, rated for 125 VDC/250 VAC.

Because the original has 16 outputs and the replacement has 8, a migration may require additional hardware or a revised I/O architecture.

What should I check before ordering a 140DRA84000?

For an existing Quantum installation, verify:

  1. Complete part number
  2. Hardware revision
  3. Rack and slot
  4. Number of outputs required
  5. AC/DC load voltage
  6. Load current
  7. Inductive versus resistive load
  8. Terminal assembly
  9. PLC application compatibility
  10. Required replacement condition

What condition should I specify when purchasing a 140DRA84000?

Use explicit terminology:

  • Factory Sealed — unopened original factory packaging
  • New Original / New Surplus — unused original equipment
  • Refurbished (tested) — previously used equipment that has been inspected and functionally tested

For a production-critical Quantum spare, request photographs of the actual module label and terminal assembly. For refurbished equipment, request the functional test scope and results. This is especially important for relay modules because contact condition directly affects field reliability.

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