Schneider Electric TSX DEF 804 8 ISOL Input Module

The Schneider Electric Telemecanique TSX DEF 804 is an 8-point isolated 110 VAC discrete input module designed for Modicon TSX 17 PLC systems. It provides eight optically isolated AC inputs for reliable field-signal acquisition, enabling the PLC to monitor machine sequencing, process control, and automation tasks. Operating from 88–132 VAC at 47–63 Hz, each input draws about 15 mA (typical) and offers 1500 VAC RMS isolation between the field and the controller, helping protect the PLC and improve noise immunity. This module mounts as a TSX 17 expansion module and is an OEM direct replacement for the TSX DEF 804 family, compatible with Telemecanique/Schneider Electric equipment and standard Modicon TSX 17 installations. It is commonly used in factory automation, conveyor systems, packaging machinery, and material handling equipment where discrete AC input signals must be reliably monitored and transmitted to the PLC for sequencing and control. Common replacements include Schneider Electric TSX DEF 804 and Modicon TSX DEF 804, underscoring its role as a straightforward upgrade or maintenance replacement for legacy TSX 17 configurations.