10
ADC-20/ADC-24 User's Guide
4.3
Analog connector
Analog inputs are connected to the ADC-20 and ADC-24 through the female DB25
connector. The connections are as follows:
Pin
Function
Pin
Function
1
Channel 2 (Channel 1-)
14
Channel 1
2
Channel 4 (Channel 3-)
15
Channel 3
3
Channel 6 (Channel 5-)
16
Channel 5
4
Channel 8 (Channel 7-)
17
Channel 7
5
Channel 10 (Channel 9-)
18
Channel 9
6
Channel 12 (Channel 11-)
19
Channel 11
7
Channel 14 (Channel 13-)
20
Channel 13
8
Channel 16 (Channel 15-)
21
Channel 15
9
Analog Ground
22
Digital Ground
10
+5 volts
23
Digital I/O 1
11
-5 volts
24
Digital I/O 2
12
+2.5 volts
25
Digital I/O 3
13
Digital I/O 4
Note 1:
Channel numbers in brackets apply when the input is set to differential
mode.
Note 2:
Channels 9 to 16 exist only on the ADC-24.
Note 3:
Digital I/Os 1 to 4 exist only on the ADC-24.
Note 4:
Pins 10 and 11 are low-current outputs for powering small sensors. Do
not exceed the current limits given in the
table.
Note 5:
The analog and digital grounds are not connected together inside the
unit. You should not connect them together externally, as this would
degrade the accuracy of the unit.
Note 6:
For easy connection to the DB25 connector, we recommend that you use
the
.
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