Name: Schneider 140DAI55300 Modicon Quantum 32-Point AC Discrete Input Module - MASSIVE
SKU: Schneider 140DAI55300

Schneider 140DAI55300 Modicon Quantum 32-Point AC Discrete Input Module

Brand Schneider

Model Schneider 140DAI55300

The Schneider 140DAI55300 is a 32-point discrete AC input module from the Modicon Quantum automation platform, designed to interface 115 VAC field signals with Quantum PLC processors and I/O systems . As a VAC digital input module, the 140DAI55300 accepts high-level AC signals directly from field devices such as limit switches, pushbuttons, selector switches, and relay contacts, eliminating the need for external interposing relays that would otherwise add cost, wiring complexity, and potential failure points. The module organizes its 32 input channels into four electrically isolated groups of eight, a configuration that supports mixed-voltage field wiring and provides protection against cross-group fault propagation .

Within the Modicon Quantum architecture, the Schneider 140DAI55300 occupies a standard single-slot position and communicates with the PLC processor via the backplane bus, drawing 250 mA of bus current for its internal operation . The module is compatible with Unity Pro, ProWORX 32, and Concept programming software environments, ensuring integration with both legacy and current Quantum development workflows . Addressing requirements are minimal, with the 140DAI55300 mapping to just two input words in the PLC memory space .

Despite its formal discontinuation by Schneider Electric in November 2020, the 140DAI55300 remains an active component in countless Modicon Quantum installations worldwide . Facilities operating Quantum-based control systems in manufacturing, process industries, and infrastructure continue to require this module for both new deployments on existing racks and as critical spares for maintenance and repair operations. The Schneider 140DAI55300 therefore serves a dual role: a proven, field-tested input solution for Quantum systems still in productive service, and an essential spare part for facilities committed to extending the operational life of their automation assets.

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Description

Technical Specifications

Parameter Name	Parameter Value
Product Model	140DAI55300
Manufacturer	Schneider Electric
Product Type	VAC Discrete Input Module
Product Range	Modicon Quantum Automation Platform
Discrete Input Count	32 (4 groups of 8)
Input Voltage	115 V AC
Input Current	11.1 mA at 57…63 Hz; 13.2 mA at 47…53 Hz
Voltage State 1 Guaranteed	79…132 V AC at 57…63 Hz; 85…132 V AC at 47…53 Hz
Voltage State 0 Guaranteed	0…20 V AC
Network Frequency Limits	47…63 Hz
Input Impedance	12000 Ohm capacitive at 57…63 Hz; 14400 Ohm capacitive at 47…53 Hz
Maximum Leakage Current	2.1 mA
Absolute Maximum Input	132 V continuous; 156 V for 10 s; 200 V for 1 cycle
Response Time	4.9…0.75 ms × line cycle Off-On; 7.3…12.3 ms On-Off
Isolation Between Groups	1780 Vrms for 1 minute
Isolation Between Group and Bus	1780 Vrms for 1 minute
Bus Current Requirement	250 mA
Maximum Power Dissipation	10.9 W
Local Signaling	1 green LED (Active), 1 red LED (F), 32 green LEDs (input status)
Standards	UL 508, CSA C22.2 No 142
Certifications	cUL, FM Class 1 Division 2
Operating Temperature	0…60 °C
Storage Temperature	-40…85 °C
Relative Humidity	95% without condensation
Operating Altitude	≤ 5000 m
Net Weight	0.33 kg

Main Features and Advantages

Direct 115 VAC Field Interface: The 140DAI55300 accepts 115 VAC input signals directly, allowing field devices such as pilot devices, limit switches, and relay contacts to connect without external signal conditioning. This direct interface reduces component count in the control cabinet, simplifies wiring diagrams, and eliminates the failure modes associated with interposing relays. The guaranteed state 1 voltage range of 79 to 132 VAC at 57–63 Hz provides substantial margin against voltage sags and brownouts, ensuring reliable input detection even under adverse power conditions .

Four-Group Isolation Architecture: The Schneider 140DAI55300 divides its 32 inputs into four groups of eight, with 1780 Vrms isolation between each group and between any group and the backplane bus . This isolation architecture serves two critical purposes: it protects the PLC processor from voltage transients and faults occurring on field wiring, and it enables mixed-voltage configurations where different input groups operate from separate AC sources. In industrial environments where ground potential differences exist between distant field devices, this group isolation prevents circulating currents that could corrupt input readings or damage the module.

Comprehensive LED-Based Diagnostics: The 140DAI55300 provides 34 front-panel LEDs that deliver immediate visual status for every input channel and the module itself . A green Active LED confirms backplane communication with the processor, a red F LED indicates an external fault condition, and 32 green LEDs correspond one-to-one with the input channels. This per-channel indication enables maintenance personnel to verify field device operation and trace wiring faults without connecting a programming terminal, dramatically reducing troubleshooting time in large installations.

Fast, Deterministic Signal Processing: The 140DAI55300 achieves Off-On response times of 4.9 to 0.75 ms per line cycle and On-Off times of 7.3 to 12.3 ms, providing the responsiveness required for interlock monitoring, sequence control, and safety-related input functions within Quantum systems . The specified response times include worst-case line cycle synchronization, ensuring predictable behavior across the full 47–63 Hz input frequency range.

Hazardous Location Certification: With FM Class 1 Division 2 certification, the Schneider 140DAI55300 is approved for installation in environments where flammable gases or vapors may be present under abnormal conditions . This rating allows Quantum PLC systems using the 140DAI55300 to be installed in classified areas of chemical plants, refineries, and other hazardous process facilities, reducing the need for purged enclosures or remote I/O cabinets.