Siemens SIMATIC S7-1500 Manual page 34

Connecting
Block diagram
The following figure shows the block diagram of the CPU 1518T‑4 PN/DP.
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 P1R PROFINET interface X1 Port 1
Figure 4-2 Block diagram of the CPU 1518T‑4 PN/DP
34
X50
4
X2 P1 X3 P1 X1 P1
PN PN PN
X2 P1 X3 P1 X1 P1R
1
2
R/S ER MT
3
5 6
7
X1 P2
X80 DC 24 V
PN
X1 P2R PB X4
PN X1 P2R PROFINET interface X1 port 2
PN X2 P1 PROFINET interface X2 port 1
PN X3 P1 PROFINET interface X3 port 1
PB X4 PROFIBUS interface X4
L+ 24 V DC supply voltage
M Ground
R/S RUN/STOP LED (yellow/green)
ER ERROR LED (red)
MT MAINT LED (yellow)
X1 P1, X1 P2, LED Link TX/RX
X2 P1, X3 P1
Equipment Manual, 11/2022, A5E50479758-AB
L+
M
CPU 1518T-4 PN/DP (6ES7518-4TP00-0AB0)