National Instruments 653X - Manual (Page 99)

Appendix C Connecting Signals with Accessories
653X User Manual C-2 ni.com
Making 68-Pin Signal Connections
Caution Do not make connections that exceed any of the maximum input or output ratings
on the 653X, listed in Appendix A, Specifications . This includes connecting any power
signals to ground and vice versa. Doing so may damage your device and your computer.
National Instruments is not liable for any damages resulting from these types of
signal connections.
Figure C-1. 653X I/O Connector 68-Pin Assignments
+5 V
REQ1*
ACK1 (STARTTRIG1)*
STOPTRIG1
PCLK1
PCLK2
STOPTRIG2
ACK2 (STARTTRIG2)*
REQ2*
DIOA0
GND
DIOA3
DIOA4
GND
DIOA7
DIOB0
DIOB1
GND
RGND
GND
DIOB6
DIOB7
DIOC0
GND
DIOC3
DIOC4
GND
DIOC7
DIOD0
GND
DIOD3
DIOD4
GND
DIOD7
RGND
GND
DPULL
CPULL
GND
GND
RGND
GND
GND
DIOA1
DIOA2
GND
DIOA5
DIOA6
GND
GND
DIOB2
DIOB3
DIOB4
DIOB5
GND
RGND
DIOC1
DIOC2
GND
DIOC5
DIOC6
GND
DIOD1
DIOD2
GND
DIOD5
DIOD6
GND
1 35
2 36
3 37
4 38
5 39
6 40
7 41
8 42
9 43
10 44
11 45
12 46
13 47
14 48
15 49
16 50
17 51
18 52
19 53
20 54
21 55
22 56
23 57
24 58
25 59
26 60
27 61
28 62
29 63
30 64
31 65
32 66
33 67
34 68