Siemens SIMATIC ET 200SP DI 8x24VDC ST - Connection: 1-wire and 2-wire connection

Wiring up
3.1 Wiring and block diagram
Digital input module DI 8x24VDC ST (6ES7131-6BF01-0BA0)
Manual, 02/2019, A5E03574157-AF
13
Connection: 1-wire and 2-wire connection
The following figure shows the block diagram and an example of the terminal assignment of
the digital input module DI 8x24VDC ST on the BaseUnit BU type A0 without AUX terminals
(1-wire and 2-wire connection).
①
1-wire connection
DI
n
Input signal, channel n
②
2-wire connection
24 V DC
Transducer supply, channel n
③
Backplane bus interface L+ 24 V DC (feed for light-colored BaseUnit
only)
④
Input electronics
M
Ground
⑤
Color identification label CCxx (optional)
DIAG
Error or Diagnostics LED (green, red)
⑥
Filter connection supply voltage (only when light-
colored BaseUnit is present)
.0 to .7 Channel status LED (green)
P1, P2, AUX Internal self-assembling voltage buses
Connection to left (dark-colored BaseUnit)
Connection to left interrupted (light-colored Ba-
seUnit)
PWR Power LED (green)
Figure 3-1 Wiring and block diagram for 1-wire and 2-wire connection of transducers