Leds; Analog Input - Measurement Computing USB-1808X-OEM User Manual

USB-1808X-OEM User's Guide
# Label
1 CH0H
2 NC
3 AGND
4 CH1H
5 NC
6 AGND
7 CH2H
8 NC
9 AGND
10 CH3H
11 NC
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

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 LED turns on when the device is detected by the computer.
 Status
The LED blinks when data is transferred and is off otherwise.
Activity


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
, connect this terminal to an available
CH7L
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 (
on page 15). They can be initiated by a digital trigger (Digital triggering on page 15) or a pattern trigger
(Pattern triggering on page 15).
Refer to 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
for download at www.mccdaq.com/support/DAQ-Signal-Connections.aspx).
Single-ended mode pinout
Terminal
Use
AI channel 0 HI
No connection
Analog ground
AI channel 1 HI
No connection
Analog ground
AI channel 2 HI
No connection
Analog ground
AI channel 3 HI
No connection
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
AGND
Terminal
# Label
29 NC
30 CH7H
31 AGND
32 NC
33 CH6H
34 AGND
35 NC
36 CH5H
37 AGND
38 NC
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
terminal.
10
Functional Details
Use
No connection
AI channel 7 HI
Analog ground
No connection
AI channel 6 HI
Analog ground
No connection
AI channel 5 HI
Analog ground
No connection
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
– refer to Clock I/O
ICLKI