NI PCI-5401
Pattern Out Connector
Use the pattern out connector on the NI PCI-5401 to supply the external trigger input to the device.
Connector Pin Assignments
The following figure shows the NI PCI-5401 50-pin VHDCI female connector.
Signal Descriptions
The following table shows the pin names and signal descriptions used on the NI 5401 digital output connector.
| Signal Name | Type | Description |
| DGND | – | Digital ground. |
| EXT_TRIG | Input | External trigger–The external trigger input signal is a TTL-level signal that you can use to start or step through a waveform generation. |
| NC | – | Not connected. |
| RFU | – | Reserved for future use. Do not connect signals to this pin. |