National Instruments NI PXI-2585 User manual

INSTALLATION GUIDE
NI PXI-2585/2586
Connector and Backshell Kit
This document describes how to create and install a cable that connects
high current signals to the NI PXI-2585 or NI PXI-2586 switch module.
Introduction
The connector and backshell kit for the PXI-2585/2586 switch module
contains all of the components necessary to build a cable assembly that is
safe for use with the entire operating range of the PXI-2585/2586 series of
products. Read through this installation guide carefully to ensure that the
cable you build is safe to use with your switch module.
Caution When hazardous voltages (>42.4 Vpk/60 VDC) are present on any solder cup pin,
safety low-voltage (≤42.4 Vpk/60 VDC) cannot be connected to any other solder cup pin.
The PXI-2585/2586 connector and backshell kit contains the following:
• Empty metal backshell
• Solder cup pins (Qty. 22)
• 0.050 in. Allen wrench
• Polyimide tape
You must supply the following items to complete the construction of the
cable:
• Soldering iron
• 16 AWG stranded wire
Caution If your cable assemblywill be used in high-voltage applications (>42.4Vpk/60VDC),
you must use UL style 2464 approved cable.
• Specifications for the module with which the cable will be used
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NI PXI-2585/2586 Connector and Backshell Kit 2 ni.com
Note The NI PXI-2585/2586 Specifications contains the pinout diagram necessary to
build the cable. Visit ni.com/manuals for the most current specifications for your
PXI-2585/2586 switch module.
Caution You must install this connector and backshell assembly according to local safety
codes and standards and according to the specifications provided by the connector
manufacturer. You are responsible for verifying safety compliance of third-party
connectors and their usage according to the relevant standard(s), including UL and CSA in
North America and IEC and VDE in Europe.
Constructing the Cable
Complete the following steps to construct a cable assembly designed to
meet high-voltage requirements (>42.4 Vpk/60 VDC).
Note If your cable assembly will be used only in low-voltage applications, the use of
UL style 2464 approved insulated cable is unnecessary. Proceed directly to step 2 to
construct a cable assembly for low-voltage applications.
1. Remove 1 in. of outer insulation from the UL style 2464 approved
cable.
2. Strip 0.2 in. (5.1 mm) of insulation from the end of each conductor.
3. Fully insert the stripped portion of each conductor into one of the
solder cup pins provided with the kit. If the conductor has been
inserted correctly, you will be able to see it through the opening in
the pin.
4. Solder each conductor to the pin by heating the conductor through the
opening of the pin. Ensure that the finished solder does not protrude
out of the opening in the pin.

©National Instruments Corporation 3 NI PXI-2585/2586 Connector and Backshell Kit
Figure 1 illustrates the components of your backshell assembly.
Figure 1. Connector and Backshell for the PXI-2585/2586
5. Remove the set screws from the knobs of the jack screws using the
Allen wrench.
6. Loosen the strain-relief bracket until it is fully open.
7. Remove the metal backshell from the plastic connector.
1SetScrews
2 Knobs
3Washers
4 Strain-Relief
5 Metal Backshell
6 Plastic Connector
7JackScrews
3
7
2
1
5
6
4

NI PXI-2585/2586 Connector and Backshell Kit 4 ni.com
8. Route all the conductors through the backshell as illustrated in
Figure 2.
Figure 2. Backshell with Threaded Wires
9. Refer to the front panel pinout diagram in your module specifications.
Use this diagram to insert the solder cup pins (with conductors
attached) into the connector. Solder cup pins will snap into place when
inserted correctly, as shown in Figure 3.
Note The letters on the backshell connector match the letters on the module. For example,
connector position “A” on your PXI-2585/2586 switch module will mate with the
connector in position “A” on the backshell kit.
Note Take care to insert the pin into the correct connector position. Once the pin is
inserted, it can only be removed from the connector with an extraction tool. Extraction
tools must be purchased separately.
1 16 AWG Stranded Wire
(UL Style 2464 Cable Shown)
2 Solder Cup Pins
2
1

©National Instruments Corporation 5 NI PXI-2585/2586 Connector and Backshell Kit
Figure 3. Connector with Inserted Solder Cup Pins
10. Cut 10 in. of polyimide tape from the roll provided. Wrap the tape
around the connector twice near the interface between the conductors
and the connector. The connector should now look like Figure 4.
Caution The polyimide tape must be installed per these instructions or your cable will only
be rated to 42.4 Vpk/60 VDC.
Figure 4. Connector Wrapped with Polyimide Tape
1 Polyimide Tape
1
1

NI PXI-2585/2586 Connector and Backshell Kit 6 ni.com
11. Reassemble the connector and backshell. Slide the backshell up the
cable, and tighten the strain-relief.
Note Replace the jack screw shaped like a socket nearest to pin “U” of the connector.
Insert the male jack screw nearest to pin “A” of the connector to ensure proper mating.
Accessories
Table 1. Optional Third-Party Accessories for the NI PXI-2585/2586 Connector and Backshell Kit
Accessory Manufacturer Part Number
Contact insertion tool Positronic 9099
Contact extraction tool Positronic 9081

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