Siemens SIMATIC ET 200SP Manual page 22

Connecting
5.1 Wiring and block diagram
Connecting the full bridge
The figure below shows the block diagram and the 4-wire/6-wire connection of the analog input
module on the BaseUnit BU type A0.
①
Backplane bus interface
②
MCU (microcontroller)
③
Filter and Analog-to-Digital Converter (ADC)
④
DMS bridge supply voltage
⑤
6-wire connection DMS bridge
⑥
Filter connection supply voltage (only when
light-colored BaseUnit is present)
U + Voltage input positive, channel n
n
U - Voltage input negative, channel n
n
U + Positive supply voltage, channel n
Vn
U - Supply voltage ground reference, channel n
Vn
U + SENSE voltage positive, channel n
Rn
20
⑦
Color identification label CCxx (optional)
⑧
Filter connection supply voltage (only when
light-colored BaseUnit is present)
⑨
4-wire connection DMS bridge
⑩
DMS bridge supply voltage
⑪
Filter and Analog-to-Digital Converter (ADC)
RES Reserve must remain disconnected for future
function enhancements
M Reference ground to U
n
L+ 24 V DC (supply only with light-colored BaseU‐
nit)
P1, P2, AUX Internal self-establishing voltage buses
Connection to the left (dark-colored BaseUnit)
Connection interrupted to the left (light-colored
BaseUnit)
DIAG Diagnostics LED (green, red)
Analog input module AI 2xSG 4-/6-wire HS (7MH4134-6LB00-0DA0)
, channel n
Vn
Manual, 09/2018, A5E41867508A-AB