Matrix Expansion

To expand the matrix of a module, directly connect wire from one terminal block to the other using the NI TB-2606 terminal block. Each module can operate as a 4×6 matrix. To form a 4×12 matrix, use two modules and connect all the rows from both TB-2606 terminal blocks.

To form a 12×6 matrix, you need three modules with three TB-2606 terminal blocks. Connect all the columns from all three terminal blocks.

Multiplexer Expansion

If you need to multiplex through more channels than the number present on your module, you can expand the size of the multiplexer. The NI TB-2605 terminal block has two analog bus connectors that allow analog bus sharing between two other modules. Each NI TB-2605 comes with a plug to share this analog bus between modules.

Refer to the module hardware diagram to see the analog bus relay that connects the multiplexer COM lines to an analog bus. This analog bus relay must be closed for multiplexer expansion. When this analog bus is shared between modules, a single larger multiplexer is formed. For example, connecting two modules using their analog bus in 2-wire 24×1 multiplexer topology, creates a 2-wire 48×1 multiplexer.

You can also use the LV6-BAN4 cable to connect a DMM directly to the analog bus that acts as the COM of the expanded multiplexer.