Siemens CPU 1518-4 PN/DP ODK Manual page 32

Connecting up
Block diagram
The figure below shows the block diagram of the CPU 1518-4 PN/DP ODK.
①
Display
②
RUN/STOP/MRES mode selector
③
Electronics
④
PROFINET 2-port switch
⑤
PROFIBUS DP driver
⑥
Backplane bus interface
⑦
Internal supply voltage
X50 SIMATIC memory card
X80 24 V DC Infeed of supply voltage
PN X1 P1 R PROFINET interface X1 Port 1
Figure 3-3 Block diagram of the CPU 1518-4 PN/DP ODK
32
PN X1 P2 R
PN X2 P1
PN X3 P1
PB X4
L+
M
R/S
ER
MT
X1 P1, X1 P2, X2 P1, X3 P1
CPU 1518-4 PN/DP ODK (6ES7518-4AP00-3AB0)
PROFINET interface X1 Port 2
PROFINET interface X2 Port 1
PROFINET interface X3 Port 1
PROFIBUS interface X4
24 V DC supply voltage
Ground
RUN/STOP LED (yellow/green)
ERROR LED (red)
MAINT LED (yellow)
LED Link TX/RX
Manual, 09/2016, A5E35681108-AA