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Relay Control Digital Output
The NI 9683 provides connections for four relay control digital output channels. Each channel
has a relay control DO+ and a current return pin, relay control DO-.
The NI 9683 has current sinking outputs, meaning the relay control DO+ is driven to relay
control DO- when the channel is ON.
You can connect industrial devices such as solenoids, actuators, relays, and lamps to the NI 9683.
Refer to Figure 16 for an illustration of how to connect devices to the NI 9683.
Figure 16. Connecting an Industrial Device to a Relay Control DO Channel
NI 9683
Ensure that all the relay control DO+/- pins are held within the safety voltage
Note
levels. A maximum common mode voltage of 30 VDC is allowed at a relay control
DO+/- pin with respect to the GND of the NI 9683. Refer to the
maximum voltages allowed for the relay control DO channels.
NI recommends using the appropriate cabling for the current return pins
Note
based on the amount of current returned per each relay control DO- output. Refer to
the
Specifications
based on the update rate.
Make sure the devices you connect to the NI 9683 are compatible with the output specifications.
Refer to the
Specifications
12 | ni.com | NI 9683 User Guide and Specifications
Relay Control DO+
Relay Control DO–
Relay Control DO+
Relay Control DO–
Relay Control DO+
Relay Control DO–
section for information about peak and continuous current limits
section for information about output voltages.
+
V
DC1
–
Load
Load
+
V
DC2
–
Load
+
V
DC3
–
+
V
CM
–
Safety
section for
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