The following figure shows the hardware diagram for the NI 2810A/B (NI 2810).
Note   Hardware relay names are for the topology of a single-card device.

The following table lists relay names for one NI 2810 card. Refer to the NI SwitchBlock Device Reference for channel and relay naming when multiple cards are combined.

Relays
kCARD1AB0
kCARD1AB1
kCARD1AB2
kCARD1AB3
kCARD1R0C0...kCARD1R0C42
kCARD1R1C0...kCARD1R1C42
kCARD1R2C0...kCARD1R2C42
kCARD1R3C0...kCARD1R3C42