SH50-50 Shielded Cable Installation Guide
Contents
1. INSTALLATION GUIDE DO INSTRUMENTS SH50 50 SHIELDED CABLE Introduction This guide describes how to use the SH50 50 shielded cable to connect a National Instruments data acquisition DAQ or Motion Control device to accessories and terminal blocks The SH50 50 shielded cable has a 50 pin female connector with a spade terminal grounding strap on one end and a 50 pin female connector with a ring terminal grounding strap on the other end The connectors are wired pin to pin with a 25 twisted pair shielded cable The SH50 50 cable kit also includes a 3 in ribbon cable and replacement brackets for your 50 pin AT board or NB board bracket You can use the brackets to modify your 50 pin board so that you can connect it to an accessory via the SH50 50 cable What You Need to Get Started To set up and use your cable you will need the following items SH50 50 shielded cable SH50 50 Shielded Cable Installation Guide A compatible National Instruments device Number 1 Phillips head screwdriver 3 in 50 to 50 pin ribbon cable included in kit Ooocovevo do Replacement brackets with spade terminals NB and AT included in kit National Instruments NI and ni com are trademarks of National Instruments Corporation Product and company names mentioned herein are trademarks or trade names of their respective companies 322023B 01 Copyright 1998 2001 National Instruments Corp All rights reserved September 2001 Replaci2. ng the Bracket Before you install the SH50 50 you must replace the bracket on your board with the appropriate bracket from the SH50 50 kit unless your board already has a bracket with a spade contact as shown in Figure 4 If your board has a bracket with a spade contact read the Installing the Cable section Use the following steps to replace the brackets on your board 1 2 3 4 Turn off the power to your computer Remove your board from your computer Remove the two screws that attach the bracket to the board Remove the bracket from the board See Figure for NB board bracket removal or Figure 2 for AT board bracket removal Figure 1 Removing the Bracket from an NB Board SH50 50 Shielded Cable Installation Guide 2 ni com Bracket Figure 2 Removing the Bracket from an AT Board 5 The 50 pin I O connector on your board may have small plastic key inserts installed for mating with military polarized connectors Because these keys are incompatible with the 50 pin connector on the SH50 50 cable you must remove them The SH50 50 connector has a center polarization bump that prevents you from inserting the connector upside down To remove the key inserts use a thin probe such as a pencil or a pen tip to gently press down on the release tab in the center of the key insert as shown in Figure 3 Then use the probe to lift up the back end of the key insert and slide the inser
3. t off the connector National Instruments Corporation 3 SH50 50 Shielded Cable Installation Guide DAQ Board Figure 3 Removing the Key Inserts 6 Identify the appropriate replacement bracket for your board from your SH50 50 kit The bracket that you use should look like the one you remove except that the new one has an extra tab that mates with the grounding strap on the SH50 50 cable assembly 7 Install the new bracket by aligning the bracket with the holes in your board and attach the two mounting screws Now you are ready to connect the SH50 50 shielded cable to a 50 pin board and accessory SH50 50 Shielded Cable Installation Guide 4 ni com Installing the Cable Figure 4 illustrates how to connect the SH50 50 shielded cable and the 3 in ribbon cable to a 50 pin board and a 50 pin accessory sl Step 4 Step 3 6 O 1 Spade Contact 5 3in Ribbon Cable 2 Grounding Strap with End Lug 6 SH50 50 Shielded Cable 3 Grounding Strap with Eyelet 7 50 Pin Board 4 50 Pin Accessory Figure 4 Connecting to a 50 Pin Board Follow the instructions below to install the SH50 50 cable to a 50 pin board and accessory 1 Install your board in a slot in your computer following the instructions in your board user manual 2 Connect the 50 pin connector of the SH50 50 cable with the spade terminal grounding s
4. trap to the board I O connector Slide the spade terminal onto the spade contact of the bracket as shown in Figure 4 3 Connect the 50 pin connector with the ring terminal grounding strap to your accessory Attach the ring terminal to any available grounding screw on your accessory 4 To improve flexibility the 3 in ribbon cable extender may be used at the accessory end of the SH50 50 National Instruments Corporation 5 SH50 50 Shielded Cable Installation Guide
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