USB-1808X-OEM User's Guide
Functional Details
10
Single-ended mode pinout
Terminal
Terminal
#
Label
Use
#
Label
Use
1
CH0H
AI channel 0 HI
29
NC
No connection
2
NC
No connection
30
CH7H
AI channel 7 HI
3
AGND
Analog ground
31
AGND
Analog ground
4
CH1H
AI channel 1 HI
32
NC
No connection
5
NC
No connection
33
CH6H
AI channel 6 HI
6
AGND
Analog ground
34
AGND
Analog ground
7
CH2H
AI channel 2 HI
35
NC
No connection
8
NC
No connection
36
CH5H
AI channel 5 HI
9
AGND
Analog ground
37
AGND
Analog ground
10
CH3H
AI channel 3 HI
38
NC
No connection
11
NC
No connection
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
LEDs
The USB-1808X-OEM has two LED indicators that indicate the status of power and data. The LEDs are
stacked one above the other (see Figure 2 on page 8).
The
Status
LED turns on when the device is detected by the computer.
The
Activity
LED blinks when data is transferred and is off otherwise.
Analog input
You can configure each analog input channel for either SE or DIFF mode. MCC recommends connecting
unused analog input terminals to analog ground terminals during operation. For example, if you are not using
CH7L
, connect this terminal to an available
AGND
terminal.
The input voltage range is software-selectable per channel for ±10 V, ±5 V, 0 V to 10 V, or 0 V to 5 V.
Analog input operations can be paced by the internal clock or by an external clock (
ICLKI
on page 15). They can be initiated by a digital trigger (
on page 15) or a pattern trigger
Synchronous I/O – mixing analog, digital, and counter scanning
on page 15 for information on running
analog input scans at the same time as other subsystem scans.
For more information about analog signal connections
For more information about analog input connections, refer to the
Guide to DAQ Signal Connections
(available