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USB-2623 User's Guide Specifications
Table 20. J5 connector pinout
19
21
23
25
27
29
31
33
35
37
39
Pin Signal name Pin description
1 NC No connection
3
5
NC
AGND
No connection
Analog ground
7
9
11
13
15
17
NC
NC
AGND
NC
AGND
TTLTRG
No connection
No connection
Analog ground
No connection
Analog ground
External digital trigger input
XAPCR
GND
NC
+VO
NC
GND
TMR2
GND
TMR3
GND
NC
External analog input scan clock
Digital ground
No connection
Power output
No connection
Digital ground
Timer output 2
Digital ground
Timer output 3
Digital ground
No connection
Pin Signal name Pin description
2 NC No connection
4
6
NC
AGND
No connection
Analog ground
8 NC
10 NC
12 AGND
14 NC
16 AGND
18 NC
No connection
No connection
Analog ground
No connection
Analog ground
No connection
20 GND
22 GND
24 NC
26 NC
28 NC
30 NC
32 NC
34 NC
36 NC
38 NC
40 NC
Digital ground
Digital ground
No connection
No connection
No connection
No connection
No connection
No connection
No connection
No connection
No connection
Standoff locations
The board is designed with standoff holes labeled TL1 to TL8.
TL1
: Standoff hole TL1 Is connected directly to the J1 USB connector shield.
TL2
: Standoff hole TL2 is connected directly to the P1 SCSI connector shield (pin 69, pin 70). The SCSI connector shield and TL2 can also be connected to the board chassis ground guard trace using the R21
(OPEN by default) resistor location.
TL4-8
: Standoff holes TL4-TL8 are electrically isolated from the PCB.
Refer to the mechanical drawing in the hardware user guide for the location of these standoff holes.
27
Measurement Computing Corporation
10 Commerce Way
Suite 1008
Norton, Massachusetts 02766
(508) 946-5100
Fax: (508) 946-9500
E-mail: [email protected] www.mccdaq.com
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