PXIe-2746 Topology

Quad 4×1 Multiplexer (Quad SP4T) Topology

Software module name: 2746/Quad 4x1 Mux (NISWITCH_TOPOLOGY_2746_QUAD_4X1_MUX). This module supports immediate operation mode.


1378

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 theniSwitch_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 a 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 from COM upon initial connection.
The following procedure illustrates the VI/function calls necessary to make consecutive connections—one between CH1 and COM and the other between CH2 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.
Figure 1. Channel Pairing and Relay Assignments
Channel Pairing and Relay Assignments