WAGO 750-454, Руководство пользователя

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750-454 [2 AI 4-20 mA, Differential Inputs] • 9
Display Elements
WAGO-I/O-SYSTEM 750
I/O Modules
2.1.1.4 Display Elements
LED Channel Meaning State Function
off
No operational readiness or the
internal data bus communication is
interrupted
A
green Function
AI 1
on
Operational readiness and trouble-
free internal data bus
communication
off Normal operation
B
red
1
Error
AI 1
on
Broken wire, overrange/underflow
of the admissible measuring range
off
No operational readiness or the
internal data bus communication is
interrupted
C
green Function
AI 2
on
Operational readiness and trouble-
free internal data bus
communication
off Normal operation
13 14
C
D
B
A
D
C
B
A
Fig. 2.1.1-2: Display
Elements
g041802x
D
red
2
Error
AI 2
on
Broken wire, overrange/underflow
of the admissible measuring range
2.1.1.5 Schematic Diagram
Common
(ground)
Common
(ground)
Shield
(screen)
+AI 1 +AI 2
-AI 2 -AI 1
+Al
-AI
10nF
270pF 270pF
A
D
Logic
I
Function
Error
Shield
(screen)
1
2
3
4
5
6
7
8
750-454
Fig. 2.1.1-3: 2-Channel Analog Input Module 750-454
g045401e