Specifications

DI 16x24VDC HF Digital Input Module (6ES7521-1BH00-0AB0)
Manual, 07/2014, A5E03485952-AD
3
Preface
Purpose of the documentation
This manual supplements the system manuals:
● S7-1500 Automation System
● ET 200MP Distributed I/O System
Functions that relate in general to the systems are described in these system manuals.
The information provided in this manual and in the system/function manuals supports you in
commissioning the systems.
Changes compared to previous version
Changes described in this manual, compared to the previous version:
● Module integrated in hardware catalog STEP 7 (TIA Portal) V13, Update 3 or higher with
the functions:
– Module-internal shared input (MSI) for Shared Device
– Configurable submodules, e.g., for Shared Device
● Appendix Open Source Software amended
Conventions
The term "CPU" is used in this manual both for the CPUs of the S7-1500 automation system,
as well as for interface modules of the ET 200MP distributed I/O system.
Please also observe notes marked as follows:
Note
A note
contains important information regarding the product described in the documentation
or its handling, or draws special attention to a section of the documentation.