ABB INNIS21 Network interface module

ABB INNIS21 Network interface module

MOSI Master-Out Slave-In – Transmits data from the SCXIbus to the module. Open collector. I/O.A24 TRIG0 – General-purpose trigger line used by the SCXI-1140 to send SCANCLK to other modules or receive SCANCLK from other modules. Open collector. I/O. B24 SS* Slot Select – When low, enables module communications over the SCXIbus. Totem pole. Input. C24 SCANCON Scanning Control – Combination output enable and reload signal for scanning operations. Each module in a chassis receives a separate SCANCON. Totem pole. Input.TRIG1 – Can be used to synchronize several SCXI-1140s in the same chassis by forcing them to go into Hold mode at the same time. Open collector. I/O. All other pins are not connected. Further information is given in Chapter 3, Theory of Operation.

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