CyberResearch UMDAS 0802DA - Manual (Page 18)

Screw terminal – pins 21-40
The screw terminals on the bottom edge of the (pins 21 to 40) provide the following connections:
! 16 digital I/O connections ( PortA0 to Port A7 , and Port B0 to Port B7 )
! One power connection ( PC+5 V )
! Three ground connections ( GND )
Main connector and pin out
Connector type Screw terminal
Wire gauge range 16 AWG to 30 AWG
20
C
T
R
19
S
Y
N
C
1
8
T
R
IG
IN
17
G
N
D
16
+
2.
5V
R
EF
15 14
D
/A
O
U
T
1
13
D
/A
O
U
T
0
12 11 10 9 8
AGND AGND CH7 IN CH6 IN AGND CH5 IN
7
CH4 IN
6A
G
N
D
5
CH3 IN
4
CH2 IN
3A
G
N
D
2
CH1 IN
1
CH0 IN
GN
D
40
GN
D
31
PC +
5 V
30
GN
D
29
Po
rt A
7
28
Po
rt B
7
39
Po
rt B
6
38
Po
rt B
5
37
Po
rt B
4
36
Po
rt B
3
35
Po
rt B
2
34
Po
rt B
1
33
Po
rt B
0
32
Po
rt A
6
27
Po
rt A
5
26
Po
rt A
4
25
Po
rt A
3
24
Po
rt A
2
23
Po
rt A
1
22
Po
rt A
0
21
8-channel single-ended mode pin out
20
C
T
R
19
S
Y
N
C
18
TR
IG_I
N
17
GN
D
16
+
2
.5
V
R
E
F
15 14
D
/A
OU
T
1
13
D
/A
OU
T
0
12 11 10 9 8
AG
N
D
AG
N
D
CH
3
IN
L
O
CH
3
IN
HI
AG
N
D
CH
2
IN
L
O
7C
H
2
IN
H
I
6A
G
N
D
5C
H
1
IN
L
O
4C
H
1
IN
H
I
3A
G
N
D
2C
H
0
IN
L
O
1C
H
0
IN
H
I
GN
D
4
0
GN
D
3
1
PC +5 V
3
0
GN
D
2
9
Po
rt
A
7
2
8
Po
rt
B
7
3
9
Po
rt
B
6
3
8
Po
rt
B
5
3
7
Po
rt
B
4
3
6
Po
rt
B
3
3
5
Po
rt
B
2
3
4
Po
rt
B
1
3
3
Po
rt
B
0
3
2
Po
rt
A
6
2
7
Po
rt
A
5
2
6
Po
rt
A
4
2
5
Po
rt
A
3
2
4
Po
rt
A
2
2
3
Po
rt
A
1
2
2
Po
rt
A
0
2
1
4-channel differential mode pin out
Analog input terminals (CH0 IN - CH7 IN)
You can connect up to eight analog input connections to the screw terminal containing pins 1 to 20 ( CH0 IN
through CH7 IN .) Refer to the " Main connector and pin out " diagrams above for the location of these pins.
You can configure the analog input channels as eight single-ended channels or four differential channels. When
configured for differential mode, each analog input has 14-bit resolution. When configured for single-ended
mode, each analog input has 13-bit resolution, due to restrictions imposed by the A/D converter.
Single-ended configuration
When all of the analog input channels are configured for single-ended input mode, eight analog channels are
available. The input signal is referenced to signal ground (GND), and delivered through two wires:
! The wire carrying the signal to be measured connects to CH# IN.
! The second wire connects to AGND.
The input range for single-ended mode is ±10 V. No other ranges are supported in this mode. Figure 3-3
illustrates a typical single-ended measurement connection.
3-3
UMDAS 0802DA User's Guide Functional Details