Siemens 6ES7963-2AA00-0AA0 Programmable Logic Controller Module

Siemens 6ES7963-2AA00-0AA0 is the IF963-TTY interface module for the SIMATIC S7-400 family, providing a 20 mA current‑loop TTY interface via a 9‑pin D‑type connector for serial communications on the S7‑400 backplane. Designed to sit in an S7‑400 system as an interface module, it enables serial communication between an S7‑400 CPU and external devices through the TTY interface, commonly connecting CPs such as CP441 or other serial interfaces. The part number 6ES7963-2AA00-0AA0 identifies this IF963‑TTY module, which is documented as part of the SIMATIC S7-400 interface module lineup. Typical applications include integrating legacy serial devices into industrial automation networks and enabling CP‑based serial communication with the S7‑400 controller.