Wiring
The following figures show the block diagram of the module and various wiring 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+
M
CHx
PWR
DI 16x24VDC HF Digital Input Module (6ES7521-1BH00-0AB0)
Manual, 01/2013, A5E03485952-01
Supply voltage connection
Ground connection
Channel or display of the channel status
Display for the supply voltage (POWER)
3
11