AppendixB ServicingYour Module
NI2590/2591 User Man ual B-2 ni.com
Followthese instructions to replace th efailed modu le asshown in
Figure B-1.
1. Ground yourself with a grounding strap or a ground connected to
your PXI chassis. Properly grounding yourself prevents damage to
your PXI module from electrostatic discharge.
2. Removethe two Phillips-head screws that fasten the NI 2590 relay
module board to the module carrier.
3. Removethe hex nuts and washers from the SMB connectors on the
front panel.
4. Gently disconnect the rear of the module from the header, then
carefully removethe module.
5. Installthe replacement module and screws in reverse order, taking care
not to damage the connector pins on the module.
Replacing the NI 2591 Relay ModuleTheNI 2591 is constructed so that the relay module can be replaced when
the relays fail. The life of the relay is nominally 105operations when
switching the maximum rated load.
Youcanorder an RF 2591 replacement relay module for your NI 2591from
NationalI nstruments. The replacement kit contains the fully assembled
module.