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User's Guide
VOUT0
IOUT0
VOUT2
IOUT2
AGND
VOUT4
IOUT4
VOUT6
IOUT6
AGND
NC
NC
NC
NC
AGND
NC
NC
NC
NC
AGND
DIO0
DIO1
DIO2
DIO3
DIO4
DIO5
DIO6
DIO7
Analog voltage output terminals (VOUT0 to VOUT7)
The screw terminal pins labeled
output range for each channel is software-programmable for either bipolar or unipolar. The bipolar range is
±10 V, and the unipolar range is 0 to 10 V.
Each D/A converter output controls a voltage and current channel pair simultaneously. When you write to a
voltage output, its associated current output is also updated. Each channel pair can be updated individually or
simultaneously.
Leave each pair of unused voltage and current outputs disconnected.
Analog current output terminals (IOUT0 to IOUT7)
The screw terminal pins labeled
for each channel is 0 to 20 mA.
Each D/A converter output controls a voltage and current channel pair simultaneously. When you write to a
current output, its associated voltage output is also updated. Each channel pair can be updated individually or
simultaneously. Leave each pair of unused voltage and current outputs disconnected.
Figure 6 shows a typical analog current output circuit. A minimum of 8 VDC must be available at IOUTn. A
maximum of 36 VDC external excitation voltage is used to power the loop. Consider the drop across the load
when selecting the supply voltage.
A typical application uses a 24 V loop supply. The loop can use either a grounded load where the supply floats,
or a grounded supply where the load floats. Each connection method is shown in Figure 6.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Figure 5. USB-3104 signal pinout
to
are voltage output terminals (see Figure 5). The voltage
VOUT0
VOUT7
to
are current output terminals (see Figure 5). The current range
IOUT0
IOUT7
29 VOUT1
30 IOUT1
31 VOUT3
32 IOUT3
33 AGND
34 VOUT5
35 IOUT5
36 VOUT7
37 IOUT7
38 AGND
39 NC
40
41
42
43 AGND
44
45
46
47
48 AGND
49 SYNCLD
50 DGND
51 ITEST
52 CTR
53 DGND
54 DIO CTL
55 DGND
56 +5V
11
Functional Details
NC
NC
NC
NC
NC
NC
NC
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