Matrix Expansion
Matrices of the NI SCXI-1129 can be expanded in two ways: by expanding columns and by expanding rows.
To expand columns, use the matrix expansion cable that connects directly into the terminal block. Each expansion cable can route four pairs of signals from one terminal block to the next. To form an 8×64 matrix using NI SCXI-1335 terminal blocks, connect two SCXI-1335 terminal blocks using one matrix expansion cable.
To expand rows, use the matrix plugs that connect to the top of selected terminal blocks. To form a 32x16 matrix using NI SCXI-1336, simply connect one matrix expansion plug on the top or the bottom of two adjacent SCXI-1336 terminal blocks.
| Terminal Block | Configuration (Row×Column) | Column Expansion Via Row Connection | Row Expansion Via Column Connection |
|---|---|---|---|
| NI SCXI-1333 | Quad 4×16 | No | Yes, with matrix expansion plug. Examples: quad 8×16, quad 16×16, and so on. |
| NI SCXI-1334 | 4×64 | Yes, with HVAB or matrix expansion cable. Examples: 4×128, 4×256, and so on. | Yes, with matrix expansion plug. Examples: 8×64, 16×64, 32×64, and so on. |
| NI SCXI-1335 | 8×32 | Yes, with two matrix expansion cables. Examples: 8×64, 8×128, and so on. | Yes, with matrix expansion plug. Examples: 16×32, 32×32, and so on. |
| NI SCXI-1336 | 16×16 | No | Yes, with matrix expansion plug. Examples: 32×16, 64×16, and so on. |
| NI SCXI-1337 | Dual 8×16 | No | No |
| NI SCXI-1339 | Quad 4×32 | No | No |
Refer to Application Note 174 at ni.com/zone and the terminal block installation instructions for additional information.