The following figure shows the hardware diagram for the NI 2812A/B (NI 2812).
Note   Hardware relay names are for the topology of a single-card device.

The following table lists relay names for one NI 2812 card. Refer to the NI SwitchBlock Device Reference for channel and relay naming when multiple cards are combined.

Relays
kCARD1AB0...kCARD1AB15
kCARD1R0C0...kCARD1R0C8
kCARD1R1C0...kCARD1R1C8
kCARD1R2C0...kCARD1R2C8
kCARD1R3C0...kCARD1R3C8
kCARD1R4C0...kCARD1R4C8
kCARD1R5C0...kCARD1R5C8
kCARD1R6C0...kCARD1R6C8
kCARD1R7C0...kCARD1R7C8
kCARD1R8C0...kCARD1R8C8
kCARD1R9C0...kCARD1R9C8
kCARD1R10C0...kCARD1R10C8
kCARD1R11C0...kCARD1R11C8
kCARD1R12C0...kCARD1R12C8
kCARD1R13C0...kCARD1R13C8
kCARD1R14C0...kCARD1R14C8
kCARD1R15C0...kCARD1R15C8