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National Instruments Corporation
11
NI 653x Cable Adapter User Guide
Custom Wiring Example
You can use different wiring schemes to connect the PFI channels in
multiple configurations. This section describes a burst handshaking
example using an NI 653
x
cable adapter to provide compatibility between
an NI 6533/6534 and an NI 6535/6536/6537 where the fixture is
configured to work with the NI 6533/6534. Without changing the fixture
setup, the adapter and software can be changed to maintain functionality.
The NI 653x cable adapter can be configured using 22- to 26-gauge wire as
shown in Figure 7.
Figure 7.
Example Connectivity
This custom wiring results in the signal assignments shown in the following
table.
Table 4.
Example Connections
VHDCI
NI 6535/6536/6537
68-Pin DAQ
NI 6533/6534
PFI_0
PFI_2 (REQ/Pause)
PFI_1
PFI_6 (ACK/Ready for Transfer)
PFI_4
PFI_4 (CLK OUT)
6535/6/7 PFI
5
4
3
2
1
0
5
4
3
2
1
0
6
7
6533/4
PFI
J1
J4
J3
J2
C1
W1
GND
+5V
ACK/Ready for Transfer
CLK OUT
REQ/Pause
