Siemens SIMATIC ET 200SP Manual page 12

Connection: 1-wire and 2-wire connection
The figure below shows the block diagram and an example of the terminal assignment of the
digital input module DI 8x24VDC BA on the BaseUnit BU type A0 without AUX terminals
(1-wire and 2-wire connection).
①
1-wire connection
②
2-wire connection
③
Backplane bus interface
④
Input electronics
⑤
Color identification label CCxx (optional)
⑥
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 and 2-wire connection of encoders
Digital input module DI 8x24VDC BA (6ES7131-6BF01-0AA0)
Manual, 02/2019, A5E34941724-AB
DI Input signal, channel n
n
24 V DC Encoder supply, channel n
L+ 24 V DC (feed for light-colored BaseUnit
only)
M Ground
DIAG Error or Diagnostics LED (green, red)
.0 to .7 Channel status LED (green)
PWR Power LED (green)
3.1 Wiring and block diagram
Wiring
11