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
AIO_I2C Wire Side View
Signal
Pin
Signal
AI8 -10V 2
1 AI8 +10V
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
2
or 18AWG.
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
AO_GND
18 17 AO8 Current
20 19 AO7 Current
22 21 AO6 Current
24 23 AO5 Current
26 23 AO4 Current
28 27 AO3 Current
30 29 AO2 Current
32 31 AO1 Current
DI Common
34 33 DI2
36 35 DI1
Figure 2-24 Analog IO Board (AIO_I2C)
Electronic Compartment Component Descriptions and Maintenance Procedures
2.4 Analog and Digital IO
Maxum II Reference Manual
Manual, 7/2017, 2000596-001
59