Siemens ET 200SP Manual page 16

Wiring: Voltage and current measurement 2 -wire connection
The following figure shows the block diagram and an example of the terminal assignment of
the analog input module AI 4xU/I 2-wire ST on the BaseUnit BU type A0/A1.
①
2-wire connection for voltage measurement
②
2-wire connection for current measurement
③
Backplane bus interface
④
Analog-to-digital converter (ADC)
⑤
Current limitation
⑥
Color-coded label with color code CC03 (op-
tional)
⑦
Temperature recording for BU type A1 only
(function cannot be used for this module)
⑧
Filter connection supply voltage (only when
light-colored BaseUnit is present)
Figure 3-1 Terminal and block diagram for voltage and current measurement
Analog Input Module AI 4xU/I 2-wire ST (6ES7134-6HD01-0BA1)
Manual, 12/2017, A5E03572832-AD
U + Voltage input positive, channel n
n
U - Voltage input negative, channel n
n
I + Current input positive, channel n
n
I - Current input negative, channel n
n
L+ 24 V DC (feed for light-colored BaseUnit
only)
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, AI2, AI3 Channel status LED (green)
PWR Power LED (green)
Wiring up
3.1 Wiring and block diagram
15