Data Acquisition (Analog I/O) Connector
Connector CN13 is a 2x20-pin header used for analog I/O data acquisition.
Single-ended
Differential
Vin 0
1
2
Vin 16
Vin 0 +
1
2
Vin 0 -
Vin 1
3
4
Vin 17
Vin 1 +
3
4
Vin 1 -
Vin 2
5
6
Vin 18
Vin 2 +
5
6
Vin 2 -
Vin 3
7
8
Vin 19
Vin 3 +
7
8
Vin 3 -
Vin 4
9
10 Vin 20
Vin 4 +
9
10 Vin 4 -
Vin 5 11
12 Vin 21
Vin 5 + 11
12 Vin 5 -
Vin 6 13
14 Vin 22
Vin 6 + 13
14 Vin 6 -
Vin 7 15
16 Vin 23
Vin 7 + 15
16 Vin 7 -
Vin 8 17
18 Vin 24
Vin 8 + 17
18 Vin 8 -
Vin 9 19
20 Vin 25
Vin 9 + 19
20 Vin 9 -
Vin 10 21
22 Vin 26
Vin 10 + 21
22 Vin 10 -
Vin 11 23
24 Vin 27
Vin 11 + 23
24 Vin 11 -
Vin 12 25
26 Vin 28
Vin 12 + 25
26 Vin 12 -
Vin 13 27
28 Vin 29
Vin 13 + 27
28 Vin 13 -
Vin 14 29
30 Vin 30
Vin 14 + 29
30 Vin 14 -
Vin 15 31
32 Vin 31
Vin 15 + 31
32 Vin 15 -
Output ground 33
34 Vout 0
Output ground 33
34 Vout 0
Vout 1 35
36 Vout 2
Vout 1 35
36 Vout 2
Vout 3 37
38 Analog ground
Vout 3 37
38 Analog ground
DIN3/EXTCLK 39
40 Digital ground
DIN3/EXTCLK 39
40 Digital ground
Signal
Definition
Vout3-0
Analog output channels 3 – 0
Analog Ground
0V analog reference
Vin 31 ~ Vin 0
Analog input channels 31 – 0 in single-ended mode
Vin 15 + ~ Vin 0 + High side of input channels 15 – 0 in differential mode
Vin 15 - ~ Vin 0 - Low side of input channels 15 – 0 in differential mode
Digital ground
0V digital reference
DIN3
Digital input port with counter/timer and external trigger
functions
EXTCLK
External A/D trigger input; Also used for digital interrupt
(DINT) input
NOTE: The reference grounds are NOT decoupled from the power grounds – they are indirectly
connected to the power supply input (and other on-board ground/0V references). Do not assume that
these grounds are floating. Do not apply a high-voltage input (relative to the power input ground) to
these ground signals or to any other board I/O pin.
Diamond Systems Corporation
Poseidon User Manual
Page 20
