Siemens 6ES7963-1AA00-0AA0

Siemens 6ES7963-1AA00-0AA0 is an RS232C interface submodule (IF96) for SIMATIC S7-400 CPs, enabling a dedicated serial link between the CPU and external devices. It is designed for CP441 interface sub-assemblies and provides a single RS-232C channel through a standard 9-pin D-type connector, supporting typical PC-style or terminal equipment communications used during programming, diagnostics, or data exchange in an automation environment. The module occupies a 25 mm width, 53 mm height, and 140 mm depth footprint and weighs approximately 69 g, allowing integration into the CP441 carrier without demanding additional space. This submodule is one of several CP441 interface variants, with alternatives including 6ES7963-2AA00-0AA0 (20 mA TTY) and 6ES7963-3AA00-0AA0 (RS422/485), which broadens the serial communication options available to S7-400 installations. As a legacy Siemens device, the 6ES7963-1AA00-0AA0 is used to connect serial peripherals to the S7-400 system, leveraging the familiar RS-232 interface for data transmission and reception. In the Siemens ecosystem, IF96 modules are typically paired with compatible CP hardware to form versatile communication links within industrial automation architectures.