NI SCXI-1193 Independent Topology

The independent topology allows the NI SCXI-1193 to utilize its full routing capabilities. Possible configurations include 3×1 multiplexers and dimensionally flexible sparse matrices.

Control the individual relays with the niSwitch Relay Control VI or the niSwitch_RelayControl function (refer to the NI SCXI-1193 hardware diagram for relay names). For example, to connect CH2 to COM0 on the NI SCXI-1193, call the niSwitch Relay Control VI or the niSwitch_RelayControl function with the action name parameter set to close and the relay name parameter set to KA0. Repeat the call to the niSwitch Relay Control VI or the niSwitch_RelayControl function to close KB1 then KC0.

When scanning the NI SCXI-1193, use the channel names in the scan list. A typical scan list entry could be ch2->com0;. This entry routes the signal connected to CH2 to COM0.

Valid Internal Channels

To determine the internal channel names, combine the names of all relays adjacent to a channel, in alphabetical order, and remove the K's. For example, in C, the channel connecting KA0 and KB0 is called A0B0.

For example, to connect CH0 to COM0 using internal channel names, call the following:

niSwitch_Connect (exampleSession, ch0, a0b0);
niSwitch_Connect (exampleSession, a0b0, b0b1c0);
niSwitch_Connect (exampleSession, b0b1c0, c0c1c2c3d0d1);
niSwitch_Connect (exampleSession, c0c1c2c3d0d1, com0);

The following is a list of the valid internal channel names: