Schneider Modicon 140DSI35300 Supervised Discrete Input Module

Product Description

The Schneider 140DSI35300 is a 32-channel supervised sink-type discrete input module for Modicon Quantum PLC platform. It is designed for 24VDC field signals with built-in wire break detection function, used to collect switch status, valve feedback, pump and alarm signals. It is widely adopted in safety-related and critical process control loops which require open-circuit diagnosis.

Features

• 32 sink input points, divided into 4 groups of 8 channels, supervised input with wire break detection
• Rated 24VDC input, ON threshold ≥11VDC, OFF threshold ≤5VDC, minimum ON current 2.5mA
• Response time: 2.2ms OFF→ON, 3.3ms ON→OFF
• Isolation: group-to-bus 1780VAC rms, group-to-group 500VAC rms for 1 minute
• LED indicators: Active green, Fault red, plus 32 individual green channel status LEDs
• Hot-swappable in Quantum rack, communicates via Quantum backplane bus, bus current draw 250mA
• Requires 4 input words addressing, configured by Unity Pro programming software
• Input protection and overvoltage withstand, continuous 30VDC max, transient 45V pulse 10ms

Application Scenarios

• Chemical, oil & gas and refinery ESD and fire & gas safety interlock systems
• Power plant auxiliary control, boiler and turbine safety signal acquisition
• Valve position feedback, pressure switch, level switch and equipment status monitoring
• Process loops requiring cable break detection and fault diagnosis
• Modicon Quantum rack expansion, spare parts replacement and automation retrofit

FAQ

Q: What is the difference between 140DSI35300 and 140DDI35300?
A: 140DSI35300 is supervised type with wire break detection; 140DDI35300 is standard 24VDC DI without cable monitoring.

Q: Which PLC series does it belong to?
A: It is a discrete input module for Schneider Modicon Quantum PLC.

Q: Is this module discontinued?
A: Yes, it is end-of-life; supply is mainly original surplus and fully tested refurbished spare parts.

Q: What software is used for configuration?
A: Unity Pro is the official programming and configuration software for Modicon Quantum hardware.