USB-1808X-OEM User's Guide
Functional Details
9
Header connectors
The header connectors provide the following connections:
Eight DIFF analog inputs (
CH0H/CH0L
to
CH7H/CH7L
) or eight SE analog inputs (
CH0H
to
CH7H
)
Refer to pages 9 and 10 for DIFF and SE pinouts.
Two analog outputs (
AOUT0
and
AOUT1
)
Four digital I/O lines (
DIO0
to
DIO3
)
Two general-purpose counter inputs (
CTR0
and
CTR1
)
Two quadrature encoder inputs (
ENC0A
,
ENC0B
,
ENC0Z
and
ENC1A
,
ENC1B
,
ENC1Z
)
Two timer outputs (
TMR0
and
TMR1
)
An external trigger input (
ITRIG)
and an external trigger output
OTRIG
)
Two external clock inputs (
ICLKI
and
OCLKI
) and two external clock outputs (
ICLKO
,
OCLKO
)
One +5 V power output (
+VO
) connection
Ten analog ground (
AGND
) and seven digital ground (
GND
) connections
The USB-1808X-OEM pinouts are shown below. Refer to Figure 2 on page 8.
Differential mode pinout
Pin
Terminal
#
Label
Use
#
Label
Use
1
CH0H
AI channel 0 HI
29
CH7L
AI channel 7 LO
2
CH0L
AI channel 0 LO
30
CH7H
AI channel 7 HI
3
AGND
Analog ground
31
AGND
Analog ground
4
CH1H
AI channel 1 HI
32
CH6L
AI channel 6 LO
5
CH1L
AI channel 1 LO
33
CH6H
AI channel 6 HI
6
AGND
Analog ground
34
AGND
Analog ground
7
CH2H
AI channel 2 HI
35
CH5L
AI channel 5 LO
8
CH2L
AI channel 2 LO
36
CH5H
AI channel 5 HI
9
AGND
Analog ground
37
AGND
Analog ground
10
CH3H
AI channel 3 HI
38
CH4L
AI channel 4 LO
11
CH3L
AI channel 3 LO
39
CH4H
AI channel 4 HI
12
AGND
Analog ground
40
AGND
Analog ground
13
+VO
+5V power output
41
AOUT0
AO channel 0
14
AGND
Analog ground
42
AOUT1
AO channel 1
15
GND
Digital Ground
43
AGND
Analog ground
16
TMR0
Timer 0 output
44
GND
Digital Ground
17
TMR1
Timer 1 output
45
DIO0
DIO channel 0
18
ICLKO
Input scan clock output
46
DIO1
DIO channel 1
19
OCLKO
Output scan clock output
47
GND
Digital Ground
20
GND
Digital ground
48
DIO2
DIO channel 2
21
ICLKI
Input scan clock input
49
DIO3
DIO channel 3
22
OCLKI
Output scan clock input
50
GND
Digital Ground
23
ITRIG
Input Trigger
51
CTR0
Counter 0 input
24
OTRIG
Output Trigger
52
CTR1
Counter 1 input
25
GND
Digital ground
53
GND
Digital ground
26
ENC1A
Encoder 1 Input A
54
ENC0A
Encoder 0 Input A
27
ENC1B
Encoder 1 Input B
55
ENC0B
Encoder 0 Input B
28
ENC1Z
Encoder 1 Input Z
56
ENC0Z
Encoder 0 Input Z
