Siemens Simatic ET 200SP Manual page 12

Wiring
3.1 Wiring and block diagram
Wiring: Voltage measurement 2-wire connection
The following figure shows the block diagram and an example of the terminal assignment of
the analog input module AI 2xU ST on the BaseUnit BU type A0/A1.
①
2-wire connection for voltage measurement
②
Backplane bus interface
③
Analog-to-digital converter (ADC)
④
Color-coded label with color code CC00 (optional)
⑤
Temperature recording for BU type A1 only (func-
tion cannot be used for this module)
⑥
Filter connection supply voltage (only when
light-colored BaseUnit is present)
Image 3-1 Wiring and block diagram for voltage measurement 2-wire connection
12
U + Voltage input positive, channel n
n
U - Voltage input negative, channel n
n
RES Reserve, must remain unused for future function
extensions
L+ 24 V DC (infeed only with light-colored
BaseUnit)
P1, P2, AUX Internal self-assembling voltage buses
Connection to left (dark-colored BaseUnit)
Connection to left interrupted (light-colored
BaseUnit)
DIAG Diagnostics LED (green, red)
AI0, AI1 Channel status LED (green)
PWR Power LED (green)
Analog input module AI 2xU ST (6ES7134-6FB00-0BA1)
Manual, 12/2015, A5E36104728-AA