Specifications

DI 16x24VDC HF Digital Input Module (6ES7521-1BH00-0AB0)
Manual, 07/2014, A5E03485952-AD
11
Wiring
3
This section contains the block diagram of the module and outlines various connection
options.
For more information on front connector wiring and creating cable shields, for example, refer
to the "Wiring" section in the S7-1500 Automation System
(http://support.automation.siemens.com/WW/view/en/59191792) and ET 200MP distributed
I/O system (http://support.automation.siemens.com/WW/view/en/59193214) system
manuals.
Abbreviations used
Meaning of the abbreviations used in the following figures:
L+
Supply voltage connection
M
Ground connection
CHx
Channel or display of the channel status
PWR
Display for the supply voltage (POWER)