Siemens Simatic S7-1500 CPU 1512C-1 PN User Manual

Wiring
4.3 Terminal and block diagrams
CPU 1512C-1 PN (6ES7512-1CK01-0AB0)
98 Manual, 12/2017, A5E40898741-AA
The figure below shows the current flow upon interruption of both ground cables.
Figure 4-18 Current flow upon interruption of both ground cables using the digital on-board I/O X11
as an example
If a wire break occurs on the first and on the second ground cable from the central terminal
block to the terminals 30 and 40 of the module, a malfunction occurs on the module. Both
ground connections of the module are interrupted.
The supply current flows from the power supply 2L+ via terminal 29 to the module. In the
module, the current flows via the output driver into the parasitic diode and exits the module
via the output terminal, e.g. as shown in the figure via terminal 27. The supply current
therefore flows via the connected load. The internal supply current is typically 25 mA.
WARNING
Interruption of both ground cables
If the ground terminals 30 and 40 are interrupted, the following incorrect response can
occur:
The activated outputs, which are switched to high, start to switch back and forth between
high and low. If the load connected at the output is sufficiently small, the output is
continuously activated.

Siemens Simatic S7-1500 CPU 1512C-1 PN Specifications

General

Integrated Interfaces	PROFINET
Data Memory	1 MB
Number of Signal Boards	1
Firmware Version	V2.8
Rated Value (DC)	24 V
Number of PROFINET Ports	2
Number of PROFINET Ports with Switch	2
Integrated Web Server	Yes
Number of Digital Inputs	16
Number of Digital Outputs	16
Number of Analog Outputs	2
Number of High-speed Counters	6
Program Memory	300 KB
Number of Signal Modules	32
Engineering with	STEP 7 Professional V13
Interface Type	Ethernet
Data Storage	Yes
Operating Temperature	0 to 60 °C
Dimensions	147 mm x 129 mm