National Instruments SCXI -1122 User Manual

Also see for SCXI-1122: Getting started Quick start guide Quick start guide Instructions for safe use

Contents

National Instruments SCXI -1122 User Manual Manual pdf 35 page image

Chapter 3 Signal Connections© National Instruments Corporation 3-13 SCXI-1122 User ManualTable 3-2. SCXIbus to SCXI-1122 Rear Signal Connector to DAQ Board Pin EquivalencesSCXIbus Line SCXI-1122Rear SignalConnectorMIO-16 Lab Boards PC-LPM-16MOSI SERDATIN ADIO0 PB4 DOUT4D*/A DAQD*/A ADIO1 PB5 DOUT5INTR* SLOT0SEL* ADIO2 PB6 DOUT6SPICLK SERCLK EXTSTROBE* PB7 DOUT7MISO SERDATOUT BDIO0 PC1 DIN6The digital timing signals are pins 36, 43, and 46.• Pin 36 is used as a clock by the SCXI-1122 to increment to the next channel after eachconversion by the DAQ board during scanning. This signal is referred to as SCANCLK.• Pin 43 is a reserved digital input.• Pin 46 is a reserved digital input.The following specifications and ratings apply to the digital I/O lines:• Absolute maximum voltage input rating 5.5 V with respect to DIGGND• Digital input specifications (referenced to DIGGND):- V IH input logic high voltage 2 V minimum- V IL input logic low voltage 0.8 V maximum- I I input current leakage ±1 μA maximum• Digital output specifications (referenced to DIGGND):- V OH output logic high voltage 3.7 V minimum at 4 mA maximum- V OL output logic low voltage 0.4 V maximum at 4 mA maximum