Schneider TSXDEY16A4: High-Density Discrete Input Module

Core Function of This Discrete Input Module

The Schneider TSXDEY16A4 reads digital signals from field sensors and switches. This discrete input module provides 16 channels for 24 V DC industrial applications. It converts field voltage levels into logic signals for the PLC CPU. Consequently, the module enables real-time monitoring of limit switches and push buttons.

Physical Dimensions and Module Construction

This discrete input module measures 130 mm in total height. Its width reaches 40 mm for a single-slot Premium form factor. The module depth stands at 110 mm including the front connector. You will find 156 discrete components on this four-layer PCB. These include optocouplers, filter circuits, and current-limiting resistors. The Schneider TSXDEY16A4 weighs approximately 210 grams for secure rack mounting.

Input Channels and Electrical Ratings

The Schneider TSXDEY16A4 offers 16 sinking input channels in a single group. Each input accepts 24 V DC nominal from proximity sensors and push buttons. The input voltage range spans from 19 to 30 V DC continuously. Each channel draws 6.5 mA of current at 24 V DC nominal. Logic high detection occurs above 15 V DC. Logic low detection occurs below 5 V DC.

Input Thresholds and Response Times

This discrete input module detects logic high at voltages above 15 V DC. Logic low occurs when the input voltage falls below 5 V DC. The typical turn-on delay reaches 1.5 milliseconds for clean signals. Turn-off delay also takes approximately 1.5 milliseconds for reliable operation. The module includes software-selectable input filtering for noisy environments. Filter values range from 0.1 to 5 milliseconds in configurable steps.

Optical Isolation and Noise Immunity

The Schneider TSXDEY16A4 uses optocouplers for each input channel group. This design provides 1,500 V RMS isolation between field and logic sides. The module also includes RC filters for high-frequency noise rejection. Each input channel withstands continuous reverse polarity connection without damage. Common mode rejection reaches 50 V per microsecond for industrial environments.

Status Indicators and Diagnostic Features

This discrete input module provides 16 green LED status indicators. One LED per channel illuminates when the input receives a logic high signal. A single green LED indicates that the module has 5 V logic power. The front panel includes a label area for user-defined channel identification. All LEDs remain visible when the module locks into the Premium rack.

Connector Type and Wiring Details

The Schneider TSXDEY16A4 uses a 20-pin screw terminal block on the front. The terminal block is removable for easy wiring replacement or module change. Each terminal accepts wire gauges from 0.2 to 1.5 mm². The module connects to the backplane via a 48-pin DIN 41612 connector. Gold-plated contacts ensure reliable connections in industrial environments.

Energy Storage and Power Requirements

The Schneider TSXDEY16A4 draws 85 mA from a 5 V DC logic supply. It also requires 20 mA from a separate 24 V DC field supply at idle. Each active input adds 6.5 mA to the field supply load. The board incorporates three 47 µF tantalum capacitors for power filtering. Total stored energy reaches approximately 0.03 joules at nominal voltage.

Installation and Compatibility Notes

You must install this module in a Modicon Premium TSX P57 PLC rack. Always remove the terminal block before inserting or extracting the module. Then, connect the 24 V field supply to the dedicated power terminals. The module requires configuration through Unity Pro or PL7 Pro software. Regular verification of LED status helps identify open field wiring or sensor failures.