Sinking Digital Output
- Updated2023-07-03
- 2 minute(s) read
Sinking Digital Output
The sbRIO-9683 provides connections for 24 sinking digital output channels.
Each channel has a sinking DO pin to which you can connect a digital input device. Sinking DO pins have dedicated current return pins, GND, which are referenced to the ground of the board.
The sbRIO-9683 has current sinking digital outputs, meaning that the output pin is driven to ground (GND) when the channel is ON.
Connecting Digital Devices to the Sinking DO
You can connect digital devices to the sinking DO.
Increasing Current Drive
Each channel of the sbRIO-9683 has a continuous output current of 20 mA. If you want to increase the output current to a device, you can connect any number of channels together in parallel.
For example, if you want to drive 80 mA of current, connect DO<0..3> in parallel, as shown in the following figure. You must turn all parallel channels on and off simultaneously so that the current on any single channel cannot exceed the 20 mA rating.
