Analog Voltage Output Terminals (Vout0 To Vout15); Analog Current Output Terminals (Iout0 To Iout15) - Measurement Computing USB-3106 User Manual

USB-3106 User's Guide
VOUT0
IOUT0
VOUT2
IOUT2
AGND
VOUT4
IOUT4
VOUT6
IOUT6
AGND
VOUT8
IOUT8
VOUT10 13
IOUT10 14
AGND
VOUT12 16
IOUT12 17
VOUT14 18
IOUT14 19
AGND
DIO0
DIO1
DIO2
DIO3
DIO4
DIO5
DIO6
DIO7

Analog voltage output terminals (VOUT0 to VOUT15)

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 IOUT15)

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
15
20
21
22
23
24
25
26
27
28
Figure 5. USB-3106 signal pin out
to
VOUT0 VOUT15
to are current output terminals (see Figure 5). The current range
IOUT0 IOUT15
29 VOUT1
30 IOUT1
31 VOUT3
32 IOUT3
33 AGND
34 VOUT5
35 IOUT5
36 VOUT7
37 IOUT7
38 AGND
39 VOUT9
40 IOUT9
41 VOUT11
42 IOUT11
43 AGND
44 VOUT13
45 IOUT13
46 VOUT15
47 IOUT15
48 AGND
49 SYNCLD
50 DGND
51 ITEST
52 CTR
53 DGND
54 DIO CTL
55 DGND
56 +5V
are voltage output terminals (see Figure 5). The voltage
11
Functional Details