Wiring up
3.1 Wiring and block diagram
Analog Input Module AI 4xI 2-/4-wire ST (6ES7134-6GD01-0BA1)
Equipment Manual, 06/2020, A5E03551866-AF
15
Wiring: Current measurement 2-wire and 4-wire connection (2-wire and 4-wire transducer)
The following figure shows the block diagram and an example of the terminal assignment of
the analog input module AI 4xI 2-/4-wire ST on the BaseUnit BU type A0/A1.
①
2-wire connection for current measurement (2-
wire transducer)
1I
n
+
Current input positive, channel n
②
4-wire connection for current measurement (4-
wire transducer)
1I
n
-
Current input negative, channel n
③
Backplane bus interface
U
Vn
Supply voltage, channel n
④
Analog-to-digital converter (ADC)
2I
n
+
Current input positive, channel n
⑤
Short-circuit protection
L+
24 V DC (infeed only with light BaseUnit)
⑥
Current limitation
M
Ground
⑦
Color-coded label with color code CC03 (op-
tional)
P1, P2, AUX
Internal self-assembling voltage buses
Connection to left (dark BaseUnit)
Connection to left interrupted (light BaseUnit)
⑧
Temperature recording for BU type A1 only
(function cannot be used for this module)
DIAG
Diagnostics LED (green, red)
U
ext
Encoder supply external
AI0, AI1, AI2,
AI3
Channel status LED (green)
PWR
Power LED (green)
Figure 3-1
Wiring and block diagram for current measurement 2-wire and 4-wire connection (2- and 4-wire transducer)