Siemens SIMATIC S7-1500 Manual page 17

Wiring: 3-wire and 5-wire connection of IO-Link devices
The example in the following figure shows the terminal assignment of the communication
module IO‑Link Master CM 8xIO‑Link (3- and 5-conductor connection of IO-Link devices).
①
②
③
④
⑤
M
L+
Figure 3-1 Block diagram and terminal assignment for 3-wire and 5-wire connection of IO-Link devices
Communication module IO-Link Master CM 8xIO-Link (6ES7547-1JF00-0AB0)
Equipment Manual, 08/2022, A5E45488510-AB
Reverse polarity protection
Backplane bus interface
IO-Link circuitry
Device, 3-wire connection
Device, 5-wire connection
Ground
Supply voltage 24 V DC
3.1 Wiring and block diagram
U Supply voltage (positive)
Sn
RUN Status display LED (green)
ERROR Error display LED (red)
PWR Power LED (green)
C/Qn Port n
C Port status/channel error LED
n
(green/red)
Q LED channel status in standard DI mode
n
(green)
Connecting
17