Schneider Electric 140ESI06210 TSX Quantum ASCII Interface Module

The Schneider Electric 140ESI06210 TSX Quantum ASCII Interface Module is a two-port RS232C serial‑link module for the Modicon Quantum PLC family, designed to exchange ASCII messages with third‑party devices such as printers, barcode scanners, weigh scales, and meters. On its front panel you’ll find the module number and color code, a display block, a removable hinged identification label, two 9‑pin SUB‑D connectors (RS232C) for Port 1 and Port 2, and a reset button. An on‑board resident command interpreter lets you configure baud rates and define ASCII message formats, which are stored in the module, while the Quantum CPU communicates with the module via mailbox registers to transmit and receive data; transmission commands specify a port and a message format, while reception formats define waits for values or characters and the applicable numeric bases. This module is intended for relatively simple point‑to‑point ASCII communications with peripherals like printers, bar code readers, meters, and other devices. Schneider Electric positions the 140ESI06210 within the Quantum ASCII interface family and notes an upgrade path to newer serial interface options such as BMXNOM0200 for similar Modbus ASCII/serial capabilities.