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2.4.3

Analog IO Board

Circuits on the AIO board (AIO_I2C) are wired as shown in the following table. The table is the
view as seen when looking at the connector while the board is installed.
Table 2-2
Figure 2-24
Maxum II Reference Manual
Manual, 7/2017, 2000596-001
Electronic Compartment Component Descriptions and Maintenance Procedures
AIO_I2C Wire Side View
Signal
Pin
Signal
AI8 -10V
2
1
AI8 +10V
AI7 -10V
4
3
AI7 +10V
AI6 -10V
6
5
AI6 +10V
AI5 -10V
8
7
AI5 +10V
AI4 -10V 10
9
AI4 +10V
AI3 -10V 12
11 AI3 +10V
AI2 -10V 14
13 AI2 +10V
AI1 -10V 16
15 AI1 +10V
18
17 AO8 Current
20
19 AO7 Current
22
21 AO6 Current
24
23 AO5 Current
26
23 AO4 Current
28
27 AO3 Current
AO_GND
30
29 AO2 Current
32
31 AO1 Current
34
33 DI2
DI Common
36
35 DI1
Analog IO Board (AIO_I2C)
Analog Inputs: -20 to 20mA into 50Ω or -10 to 10V,
R10=1MΩ, mutually isolated 10V
Analog Outputs: 0-4 to 20mA. Common negative
pole, galvanically separated from ground, freely con‐
nectable to ground; working resistance 750Ω.
Digital Inputs: Optocoupler with internal 12-24VDC
power supply, switchable with floating contacts; alter‐
native: switchable with external voltage 12-24VDC,
common negative pole.
I/O Terminal Design: Plug-in terminal strips for stran‐
ded or solid conductors with a maximum diameter of
1.0mm
or 18AWG.
2
2.4 Analog and Digital IO
59

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