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For Simatic S7 system applications, Siemens 6ES7133-0BH00-0XB0 provides the function of a Digital Input/Output Module.
For replacement planning, this class of module brings discrete field status into the control system. Typical signal sources include switches, relay contacts, permissives, and equipment-status circuits when they match the module's electrical requirements. The plant's maintenance records should support final product selection.
Within an S7 installation, the exact hardware order number determines supported interfaces and configuration behavior. System and software compatibility should be checked before replacement. Its role should remain distinct from that of similarly named assemblies.
In the signal path, this approach helps preserve the intended system function while keeping selection aligned with the documented ratings, capacity, and compatibility requirements. The surrounding rack and module arrangement should be reviewed before installation.
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