Header Connectors - Measurement Computing USB-1808X-OEM User Manual

USB-1808X-OEM User's Guide

Header connectors

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