This part is a kind of semiconductor called S5-135U.

Function of this product has SIMATIC System Manual.

Manufacturers : Siemens

Image and pinout :

Some of the text within the PDF file :

Contents Notes on Using this Manual and on the CE Symbol Centralized and Distributed Configuration of a Programmable Controller 1 2 3 4 5 6 7 8 9 10 11 SIMATIC Installation Guidelines S5-135U/155U Central Controllers and Expansion Units Power Supply Units CPUs, Memory Cards, Memory Submodules, Interface Submodules Multiprocessor Operation/ Coordinators System Manual This manual has the order number: Interface Modules Digital Input/Output Modules Analog Input/Output Modules Monitoring Module Connector Assignments Appendices Appendix Guidelines for Handling Electrostatically-Sensitive Devices (ESD) Index 6ES5998-0SH21 A B 11/99 Edition 07 Safety Guidelines This manual contains notices which you should observe to ensure your own personal safety, as well as to protect the product a [ ... ]

S5-135U PDF Datasheet Download