NI 2811 Multicard Topologies
- Updated2025-01-20
- 2 minute(s) read
The following table lists possible topologies for an NI 2811 NI SwitchBlock device. Refer
to Initializing with Topology for NI SwitchBlock Devices for information about using the
Configured Topology and NISWITCH_TOPOLOGY_CONFIGURED_TOPOLOGY software names.
Note You must connect pin 96 (INTERLOCK ENABLE) to pin
48 (GND) with a 500 Ω resistor (500 Ω ±20%, 1/10 W minimum) to allow connection to
the analog bus. Refer to the NI SwitchBlock Safety Interlock topic for additional
information about this safety feature.
| Number ofNI 2811 Cards | Topology | Software Name | Immediate | Scanning |
|---|---|---|---|---|
| 1 | 1-Wire 8×21 Matrix | Configured Topology(NISWITCH_TOPOLOGY_CONFIGURED_TOPOLOGY) |
|
— |
| 2 | 1-Wire 8×42 Matrix | Configured Topology(NISWITCH_TOPOLOGY_CONFIGURED_TOPOLOGY) |
|
— |
| 3 | 1-Wire 8×63 Matrix | Configured Topology(NISWITCH_TOPOLOGY_CONFIGURED_TOPOLOGY) |
|
— |
| 4 | 1-Wire 8×84 Matrix | Configured Topology(NISWITCH_TOPOLOGY_CONFIGURED_TOPOLOGY) |
|
— |
| 5 | 1-Wire 8×105 Matrix | Configured Topology(NISWITCH_TOPOLOGY_CONFIGURED_TOPOLOGY) |
|
— |
| 6 | 1-Wire 8×126 Matrix | Configured Topology(NISWITCH_TOPOLOGY_CONFIGURED_TOPOLOGY) |
|
— |
Refer to the NI SwitchBlock Device Reference for information about creating multicard devices.