Siemens SIMATIC ET 200SP Manual page 56

Wiring: 3-wire connection
The figure below shows an example of pin assignment for the DI 8×24VDC HS digital input
module on the BaseUnit BU type A0 with AUX terminals (3-wire connection).
①
②
③
DI
n
L+
n
DC 24 V
M
1A ... 10A
P1, P2, AUX
Figure 5-2
Digital input module DI 8x24VDC HS (6ES7131-6BF00-0DA0)
Equipment Manual, 11/2019, A5E35243810-AD
3-wire connection
Color-coded labels CCxx (optional)
Supply voltage filter circuit (only available with light BaseUnit)
Input signal, channel n
Encoder supply, channel n
Supply voltage L+ (infeed only with light BaseUnit)
Ground
AUX terminals
Internal self-configuring voltage buses
Connection to the left (dark BaseUnit)
Connection to the left interrupted (light BaseUnit)
Pinout and block diagram for 3-wire connection of encoders
Oversampling (OVS) operating mode
5.1 Connecting
55