National Instruments 2591 User manual

National Instruments™and PXI™ are trademarks of National Instruments Corporation. Product and company names mentioned herein are trademarks
or trade names of their respective companies.
323026A-01 ©Copyright 2001 National Instruments Corp. All rights reserved. January 2001
INSTALLATION GUIDE
REPLACING THE NI 2591 RELAY MODULE
The NI 2591 is constructed so that you can replace the relay module when
the relays fail. The life of the relay is nominally 105operations when
switching the maximum-rated load.
Figure 1. NI 2591 Parts Locator Diagram
1 Hex Nuts and Washers 2 Relay Module 3 Base Card
3
2
1

Follow these instructions, and refer to Figure 1 to replace the failed module.
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. Remove the four Phillips-head screws and nuts that fasten the NI 2591
relay module to the module carrier.
3. Remove the hex nuts and washers from the SMA connectors on the
front panel.
4. Remove the PXI ejector handle screw that secures the front panel.
5. Remove the module from the base card.
Note You can order an RF 2591 replacement relay module for your NI 2591 from
National Instruments. The replacement kit contains the fully assembled module.