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Schneider Electric 140DRA84000 Relay Discrete Output Module

TheSchneider Electric 140DRA84000also cataloged asthe140DRA84000Relay Discrete Output Module, operates as a dedicated hardware component for electrical load switching within Modicon Quantum backplane I/O execution architecture. It provides 16 independent relay outputs for direct actuation of AC/DC field loads via isolated Form A contacts.

Suffix Breakdown & Model Matrix

No structured suffix decomposition is defined in the provided technical data. The module is treated as a single-order hardware identifier: 140DRA84000.

Hardware Specifications

Parameter	Specification
ModelBrand	Schneider Electric 140DRA84000
Origin	France
Weight	0.41 kg
PowerConsumption	5.5 W + (0.5 x points ON)
Output Type	Relay, Form A (1 NO per channel)
Output Channels	16
Rated Voltage	5 to 30 VDC, 20 to 250 VAC, 30 to 150 VDC
Max Load Current	1 A per channel (AC/DC)
Switching Capacity	500 VA resistive

Schneider Electric Backplane I/O Deterministic Execution Layer

Within the Modicon Quantum architecture, the 140DRA84000 interfaces through backplane bus communication where output command frames are mapped to a 16-bit output word. Schneider Electric PLC systems typically implement deterministic scan-based execution, ensuring synchronized output refresh aligned with CPU cycle timing. The relay stage provides galvanic isolation between logic domain and field power domain, supporting mixed AC/DC load environments without shared reference coupling. Backplane current consumption of 1100 mA must be accounted for during chassis power budget allocation.

Frequently Asked Questions

Q: Can the module outputs be hot-swapped under load?
A: No. Relay output hardware is not designed for live field load insertion or removal. Backplane power should be removed before module extraction.

Q: What is the isolation rating between channels?
A: Channel-to-channel and bus isolation is specified at 1780 Vrms for 1 minute, providing separation between output groups and logic backplane.

Q: Does each channel support inductive load switching directly?
A: Inductive loads require external suppression. Internal protection is limited to varistor clamping at 275 V.

Field Installation Guidelines

The module shall be installed in a Modicon Quantum chassis slot with backplane connector fully seated to ensure signal integrity across the I/O bus. Field wiring must follow segregation rules between AC and DC circuits to prevent cross-coupling. Relay output wiring should maintain minimum creepage distances in accordance with system voltage class. Shielding is not required at the relay contact level but is recommended for adjacent analog or communication cabling. All terminal torque values must follow cabinet-level electrical standards defined by system integrator practices.

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