Product Overview
The 140DDI15310 is a discrete input module from Schneider Electric’s Modicon Quantum series. It provides 32 TTL input points at 5 V DC with negative logic (source type), arranged in four isolated groups of eight. This module suits control systems that need dense, fast low-voltage input sensing in a single backplane slot.
Schneider Electric has discontinued this module (End of Sale, last verified 2026-09). Oil AutoTech helps you plan a practical replacement path and can supply remaining stock or a compatible alternative. Contact Oil AutoTech today for pricing and availability.
Technical Specifications
32 Points in Four Isolated Groups
The 140DDI15310 packs 32 input points into four groups of eight. Each group is isolated from the others at 500 Vrms for 1 minute, and group-to-bus isolation reaches 1780 Vrms for 1 minute. This grouping limits fault propagation, so a problem in one field circuit does not disturb the rest of the rack.
5 V DC TTL Inputs with Negative Logic
Each channel accepts a 5 V DC TTL signal and draws 4 mA in state 1. Negative logic (source type) means the input reads a low level as the active state. Confirm your field device polarity matches this convention before wiring.
Fast Response and Low Backplane Load
The module responds in 1 ms or less (typical), which supports time-sensitive sensing tasks. It draws 170 mA at 5 V DC from the backplane and consumes 5 W, so it adds little load to the rack power budget.
Diagnostics and Physical Format
An external fault (F) LED gives a quick visual indication when a field-side problem occurs. The module occupies one slot and measures 250 × 40.34 × 103.85 mm at 0.3 kg. Its IP20 rating suits clean cabinet environments.
Industry Applications
Oil and Gas Signal Concentration
In oil and gas control rooms, this module concentrates many low-voltage status signals into one Quantum rack. The 32-point density and 1 ms response help operators see valve and switch states without delay.
Legacy System Replacement
Plants running older Quantum installations often need this exact module to keep a line running. Because it is discontinued, buyers should secure spares early rather than wait for a failure. Oil AutoTech supports fast dispatch, worldwide, so a critical rack can be restored quickly.
Discrete Manufacturing Control
Machine builders use TTL-level inputs to read encoder or sensor outputs at high speed. The four isolated groups keep noisy field wiring separated, which protects signal integrity on busy production floors.
Installation and Setup
Mount the module in a single Quantum backplane slot and confirm the rack provides 5 V DC. Keep field wiring separated by group to preserve the isolation the module offers. Verify TTL polarity and source-type wiring before power-up, since negative logic reverses the expected active state. Route low-voltage signal cables away from high-power conductors to reduce induced noise. After installation, check the external fault LED during commissioning to confirm each group behaves correctly.
Compatibility and Integration
This module belongs to the Modicon Quantum platform and communicates through the Quantum backplane, so it works with Quantum CPUs and racks that supply 5 V DC. It does not use a fieldbus directly; network connectivity comes from the rack’s communication modules. If you plan to integrate the rack into a plant network, confirm gateway and cabling requirements with your supplier before ordering.
Maintenance and Reliability
Inspect the module periodically for loose connections, dust buildup, and LED status. Keep the cabinet within a clean, controlled environment to respect the IP20 rating. Because the product is discontinued, treat each installed unit as a limited asset: track spares, monitor fault LEDs, and replace at the first sign of intermittent behavior. Planned replacement avoids unplanned downtime and protects production ROI.
Selection Guide
Before buying, confirm your rack is a Modicon Quantum system with a 5 V DC backplane and an open slot. Verify that your field devices output 5 V DC TTL signals with negative logic. Check that 32 points in four groups of eight match your channel count and isolation needs. Since the module is discontinued, ask about remaining stock and compatible alternatives. Oil AutoTech offers hands-on technical selection help and quick worldwide delivery.
Frequently Asked Questions
Is the 140DDI15310 still in production?
No. Schneider Electric lists it as discontinued (End of Sale). Contact Oil AutoTech to check remaining stock or discuss a replacement.
What signal type does this module accept?
It accepts 5 V DC TTL inputs with negative logic (source type), 32 points across four groups of eight.
How fast does the module respond?
Typical response time is 1 ms or less, which suits time-sensitive discrete sensing.
What isolation does it provide?
Group-to-bus isolation is 1780 Vrms for 1 minute, and isolation between groups is 500 Vrms for 1 minute.
How much backplane current does it draw?
It draws 170 mA at 5 V DC and consumes 5 W.
