Schneider TSXSCY21601 Communication Module – Dual Serial Ports

The Schneider TSXSCY21601 handles data exchange between PLCs and field devices. This communication module serves the Modicon TSX Premium automation platform. You can connect HMIs, drives, barcode readers, or third-party controllers. The unit provides two independently configurable serial communication ports.

Communication and Protocol Specifications

The Schneider TSXSCY21601 supports Modbus, Uni-Telway, and character mode protocols. This communication module allows baud rates from 300 to 115,200 bits per second. You can configure each port independently for different devices. The RS-485 port supports multi-drop networks with up to 31 slaves.

Physical Dimensions and Weight

This communication module weighs 0.35 kg for secure rack installation. The unit occupies a single slot in a TSX Premium chassis. Its height reaches 130 mm including the front connectors. You can insert the Schneider TSXSCY21601 alongside any TSX I/O or CPU modules.

Interface and Connection Details

A 9-pin female D-sub connector provides the RS-232 interface. This port supports RTS/CTS hardware handshaking for reliable data transfer. A 5-pin removable terminal block handles RS-485 connections. You will find separate terminals for Data+, Data-, and common ground. Two banks of LED indicators show transmit, receive, and port activity status.

Energy Storage and Internal Circuitry

The Schneider TSXSCY21601 stores minimal energy for signal buffering. Small capacitors provide 110 µF of total storage for the communication controller. The module does not contain any battery for configuration retention. Instead, it reads all settings from the PLC configuration at power-up. Two optocoupler banks provide 1500 VAC isolation between ports and backplane.

Component Layout and Construction

A dedicated 16-bit communication processor handles all protocol management. Two independent UARTs manage the serial data streams separately. You will find 68 resistors, 54 capacitors, and 8 integrated circuits on the board. The Schneider TSXSCY21601 includes a DC-DC converter for internal power regulation. A metal shield covers the RS-485 transceiver section for noise reduction.

Operational Use and System Integration

Transitioning to this module expands your Premium system communication capacity. You can connect two different device types on separate ports simultaneously. The module works with Schneider drives, HMIs, and third-party Modbus devices. Use the Schneider TSXSCY21601 for data logging, remote monitoring, or device networking. For best results, terminate RS-485 networks with 120-ohm resistors at both ends.