PXI-2554 Overview

PXI-2554 Pinout


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Table 1. Signal Descriptions
Signal Description
CHx Signal connection
COM Routing destination for all channels

PXI-2554 Hardware Diagram

This figure shows the hardware diagram of the module.


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PXI-2554 Topology

This figure describes the topology of the module.

Module software name: 2554/4x1 Mux (NISWITCH_TOPOLOGY_2554_4X1_MUX)

4x1 Multiplexer


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Making a Connection

Call the niSwitch Connect Channels VI or the niSwitch_Connect function to connect channels in this topology. If applicable, you must call the niSwitch Disconnect Channels VI or the niSwitch_Disconnect function to disconnect an existing connection before you call the niSwitch Connect Channels VI or the niSwitch_Connect function.

Note The niSwitch Disconnect Channels VI or the niSwitch_Disconnect function does not operate the relay until the next niSwitch Connect Channels VI or the next niSwitch_Connect function is executed. Thus, one channel of the 4×1 multiplexer is always connected to the common channel. If you have reset the module or called the niSwitch Disconnect All Channels VI or the niSwitch_DisconnectAll function, you do not need to disconnect the default channel (ch0) from COM upon initial connection.

The following sequence of tasks illustrates the VI/function calls necessary to make consecutive connections—one between CH 1 and COM and the other between CH 2 and COM:

  1. Call the niSwitch Connect Channels VI or the niSwitch_Connect function with parameters ch1 and com.
  2. Call the niSwitch Disconnect Channels VI or the niSwitch_Disconnect function with parameters ch1 and com.
  3. Call the niSwitch Connect Channels VI or the niSwitch_Connect function with parameters ch2 and com.

When scanning the module, a typical scan list entry might be ch1->com;. This entry routes the signal connected to CH 1 to COM.