Siemens SIMATIC S7-1500 Manual page 34

Block diagram
The following figure shows the block diagram of the CPU 1511-1 PN.
① CPU with control and operating mode
buttons
② Display
③ Electronics
④ PROFINET 2-port switch
⑤ Backplane bus interface
⑥ Internal supply voltage
PN X1 P1 R PROFINET interface X1 Port 1
PN X1 P2 R PROFINET interface X1 Port 2
X50 SIMATIC memory card
Figure 3-2 Block diagram CPU 1511-1 PN
CPU 1511-1 PN (6ES7511-1AK02-0AB0)
Equipment Manual, 05/2021, A5E40869673-AB
X80 24 V DC Infeed of supply voltage
L+ 24 V DC supply voltage
M Ground
SF STOP ACTIVE LED (yellow)
R/S RUN/STOP LED (yellow/green)
ER ERROR LED (red)
MT MAINT LED (yellow)
X1 P1, X1 P2 LED Link TX/RX
Connecting up
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