© National Instruments Corporation
3-1
DAQCard-500 User Manual
Chapter 3
Signal Connections
This chapter describes the signals on the PR27-30F I/O connector and the CB-27 connector
block, optional accessories available from National Instruments. Appendix C, Custom Cable
Design, contains information and guidelines for the design of custom cables. Appendix F,
PSH27-50F Signal Connections, contains information for using the the PSH27-50F and the
CB-50 connector block, optional accessories available from National Instruments.
I/O Connectors
Figure 3-1 shows the pin assignments for the PR27-30F I/O connector and CB-27 connector
block. Although the pin arrangements on these connectors differ, notice that the signal names
and pin numbers are the same.
Warning: Connections that exceed any of the maximum ratings of input or output signals on
the DAQCard-500 can damage the DAQCard-500 and your computer. This
includes connecting any power signals to ground and vice versa. National
Instruments is
NOT
liable for any damages resulting from such signal connections.
2
4
6
8
10
12
14
16
18
11
13
15
17
20
22
24
26
28
30
ACH0
ACH2
ACH4
ACH6
+5 V
DIN0
DIN2
DOUT0
DOUT2
1MHz
CLK1
GATE2
OUT2
NC
NC
AIGND
ACH1
ACH3
ACH5
ACH7
EXTCONV*
DIN1
DIN3
DOUT1
DOUT3
DGND
OUT1
CLK2
DGND
NC
1
3
5
7
9
19
21
23
25
27
29
key
9
8
7
6
5
22
21
20
19
4
3
2
1
1
DIN1
DIN0
EXTCONV*
+5 V
ACH7
ACH6
ACH5
ACH4
ACH3
ACH2
ACH1
ACH0
AIGND
AIGND
DGND
OUT2
CLK2
GATE2
OUT1
CLK1
DGND
1 MHz
DOUT3
DOUT2
DOUT1
DOUT0
DIN3
DIN2
18
17
16
15
14
13
12
11
10
23
24
25
26
27
a. CB-27 Connector Block
b. PR27-30F Cable
Figure 3-1. I/O Connector Pin Assignments