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Siemens Simatic ET 200SP Manual Page 12

Analog input module ai 2xu st.
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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.
2-wire connection for voltage measurement
Backplane bus interface
Analog-to-digital converter (ADC)
Color-coded label with color code CC00 (optional)
Temperature recording for BU type A1 only (func-
tion cannot be used for this module)
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

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