Here's some information about this particular module:

Manufacturer: Siemens

Product family: SIMATIC ET 200SP

Model number: 6ES7135-4GB01-0AB0

Description: Digital Input Module

Input type: 16 digital inputs, 24 V DC

Input signal: Sink/Source

Connection type: Removable screw terminals

Diagnostic coverage: Yes

Electrical isolation: Yes

Compatibility: Compatible with SIMATIC ET 200SP CPU modules and other modules in the ET 200SP series

The module is designed to provide digital input capabilities to the PLC system. It allows the PLC to read signals from external devices or sensors that provide a 24 V DC signal. The input module provides electrical isolation to ensure signal integrity and protect the PLC from potential electrical issues

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