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Appendix B
Customizing Your Card
©
National Instruments Corporation
B-3
3.
Remove the plastic insulator cover.
4.
Lift up the card and disconnect the ribbon cable from the relay module.
5.
Insert the diode/varistor into the appropriate location, labeled RVx,
where x corresponds to the channel number.
6.
Solder and trim the leads.
7.
Reassemble the module.
Replacing Relays
The NI 2565 uses socketed relays, which are easy to replace when they fail.
The electrical life of the relay is approximately 10
5
operations when
switching at the rated load.
You can order a relay replacement kit from National Instruments. The
replacement kit includes 16 new relays. Follow these instructions to replace
the failed relay. Refer to Figure B-1.
1.
Ground yourself via a grounding strap or a ground connected to
your PXI chassis. Properly grounding yourself prevents damage to
your PXI module from electrostatic discharge.
2.
Remove the four screws that fasten the NI 2565 relay module board to
the switch carrier module and front panel.
3.
Lift up the card as shown in Figure B-1.
4.
Remove the relay by applying force in the direction shown in
Figure B-2.
5.
Before inserting the new relay, match the direction of the relay and the
socket.
6.
Insert the relay, making sure the relay is properly seated and the socket
hooks the top of the relay.
7.
Reassemble the module.