Pin 20 of SCXI-1166 DSub connector

Pin 20 of SCXI-1166 D-sub Connector is assigned as Ground. Does this ground connects to the SCXI Chassis?
Can I use this Pin 20 for signal wire shielding purposes?
rg
Naushad

Hi Naushad,
Pin 20 of the SCXI-1166 connects directly to the SCXI chassis ground. You can use Pin 20 for signal wire shielding purposes. Remember, the usual rule is to only ground one end of the shield. If it is grounded at both ends then a difference in ground potential could cause a current flow through the shield and hence introduce noise.
Let me know if you have further questions!
Chad Erickson
Switch Product Support Engineer
NI - USA

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Message Edited by walkerx on 03-2-2005 0:59 AM

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Pin Name Description VCC +5V power supply 2 VCC +5V power supply 3 GND Ground 4 AC97CLK 24.5 MHz clock output 5 GND Ground 6 GP_SPDIFIN#2 SPDIF input signal 7 GND Ground 8 GND Ground 9 SPDIFO#3 SPDIF out Signal 0 GPO General Purpose Output # GPO2 General Purpose Output #2 2 GND Ground 3 GPO0 General Purpose Output #0 4 GND Ground 5 GP_ SPDIFIN SPDIF Input signal 6 GND Ground 7 GPDIFO#0 SPDIF Out signal 8 GND Ground 9 SPDIFO# SPDIF Out signal 20 GND Ground 2 GND Ground 22 SPDIFO SPDIF Out signal 23 GPI0 Digital Input (GP Input 0; Reserved) 24 GPI Digital Input (GP Input ; Reserved) 25 OUTMIDI MIDI Output 26 GND Ground 27 INMIDI MIDI Input 28 GND Ground 29 KEY no pin 30 KEY no pin 3 ADCSDO2 I2S audio data input 32 GND Ground 33 ADCSDO I2S audio data input.34 GND Ground 35 ADCSDO0 I2S audio data input 36 GND Ground 37 I2SCLK I2S serial bit clock 38 GND Ground 39 I2SFS Frame sync. 40 GND GroundMessage Edited by SoNic2367 on 07-09-2006 0:58 PM

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