Siemens SIMATIC ET 200SP Manual page 15

Wiring: 1-wire connection
The following figure shows the block diagram and an example of the terminal assignment of
the digital input module DI 16x24VDC ST on the BaseUnit BU type A0 without AUX terminals
(1-wire connection).
①
1-wire connection
②
Backplane bus interface
③
Input electronics
④
Color-coded label with color code CC00 (optional)
⑤
Filter connection supply voltage (only when light-
colored BaseUnit is present)
P1, P2, AUX Internal self-assembling voltage buses
Connection to left (dark-colored BaseUnit)
Connection to left interrupted (light-colored BaseUnit)
Figure 3-1 Wiring and block diagram for 1-wire connection of encoders
Digital input module DI 16x24VDC ST (6ES7131-6BH01-0BA0)
Manual, 09/2017, A5E03573442-AF
3.1 Wiring and block diagram
DI Input signal, channel n
n
L+ 24 V DC (infeed only with light-colored
BaseUnit)
M Ground
DIAG Error or diagnostics LED (green, red)
.0 to .15 Channel status LED (green)
PWR Power LED (green)
Connecting
15