Siemens SIMATIC ET 200SP Manual page 16

Wiring: 1 and 2-wire connection
The following figure shows the block diagram and an example of the terminal assignment of
the digital input module DI 8×24VDC HF on the BaseUnit BU type A0 without AUX terminals
(1- and 2-wire connection).
①
1-wire connection
②
2-wire connection
③
Backplane bus interface
④
Input electronics
⑤
Color-coded label with color code CC01 (option-
al)
⑥
Supply voltage filter circuit (only available with
light BaseUnit)
M Ground
DI Input signal, channel n
n
Figure 3-1 Pinout and block diagram for 1 and 2-wire connection of encoders
Digital input module DI 8x24VDC HF (6ES7131-6BF00-0CA0)
Manual, 12/2017, A5E03576305-AE
L+ Encoder supply, channel n
n
L+ 24 V DC (infeed only with light BaseUnit)
DIAG Error or diagnostics LED (green, red)
.0 to .7 Channel status LED (green)
PWR Power LED (green)
F0 to F7 Channel fault LED (red)
P1, P2, AUX Internal self-configuring voltage buses
Connection to the left (dark BaseUnit)
Connection to the left interrupted (light BaseUnit)
3.1 Wiring and block diagrams
Wiring
15