NI SCXI-1127/1128
The NI SCXI-1127 and the NI SCXI-1128 are high-density, high-voltage multiplexer/matrix modules for the SCXI platform. The NI SCXI-1127 is composed of armature relays, and the NI SCXI-1128 uses solid-state relays. The NI SCXI-1127/1128 support routing signals to the high-voltage analog bus.
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Note For EMC compliance, operate this device with shielded cables. |
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Notes The NI SCXI-1127/1128 only support continuous scanning. |
| If you configure the NI SCXI-1127/1128 as a Traditional NI-DAQ (Legacy) Device, you can only select the 2-wire 32×1 multiplexer, 2-wire 4×8 matrix, and independent topologies. To use the NI SCXI-1127/1128 as 1-wire, 2-wire, and 4-wire multiplexer, select the 2-wire 32×1 multiplexer topology and configure all channels appropriately in Measurement and Automation Explorer (MAX). |
NI SCXI-1127 Operation Modes
The following table lists the supported topologies of the NI SCXI-1127 and possible operation modes.
| Topology | Software Name | Immediate | Scanning |
|---|---|---|---|
| 1-Wire 64×1 Multiplexer | 1127/1-Wire 64x1 Mux (NISWITCH_TOPOLOGY_1127_1_WIRE_64X1_MUX) |  | |
| 2-Wire 32×1 Multiplexer | 1127/2-Wire 32x1 Mux (NISWITCH_TOPOLOGY_1127_2_WIRE_32X1_MUX) | | |
| 4-Wire 16×1 Multiplexer | 1127/4-Wire 16x1 Mux (NISWITCH_TOPOLOGY_1127_4_WIRE_16X1_MUX) | | |
| 2-Wire 4×8 Matrix | 1127/2-Wire 4x8 Matrix (NISWITCH_TOPOLOGY_1127_2_WIRE_4X8_MATRIX) | | — |
| Independent | 1127/Independent (NISWITCH_TOPOLOGY_1127_INDEPENDENT) | | — |
NI SCXI-1128 Operation Modes
The following table lists the supported topologies of the NI SCXI-1128 and possible operation modes.
| Topology | Software Name | Immediate | Scanning |
|---|---|---|---|
| 1-Wire 64×1 Multiplexer | 1128/1-Wire 64x1 Mux (NISWITCH_TOPOLOGY_1128_1_WIRE_64X1_MUX) | | |
| 2-Wire 32×1 Multiplexer | 1128/2-Wire 32x1 Mux (NISWITCH_TOPOLOGY_1128_2_WIRE_32X1_MUX) | | |
| 4-Wire 16×1 Multiplexer | 1128/4-Wire 16x1 Mux (NISWITCH_TOPOLOGY_1128_4_WIRE_16X1_MUX) | | |
| 2-Wire 4×8 Matrix | 1128/2-Wire 4x8 Matrix (NISWITCH_TOPOLOGY_1128_2_WIRE_4X8_MATRIX) | | — |
| Independent | 1128/Independent (NISWITCH_TOPOLOGY_1128_INDEPENDENT) | | — |