Measurement Computing USB-3110 - Manual (Page 16)

USB-3110 User's Guide Functional Details
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Synchronizing multiple units
You can connect the SYNCLD terminal pin (pin 49) of two USB-3110 units together in a master/slave
configuration and simultaneously update the DAC outputs of both devices. Do the following.
1. Connect the SYNCLD pin of the master USB-3110 to the SYNCLD pin of the slave USB-3110.
2. Configure the SYNCLD pin on the slave device for input to receive the D/A LOAD signal from the master
device. Use InstaCal to set the direction of the SYNCLD pin.
3. Configure the SYNCLD pin on the master device for output to generate an output pulse on the SYNCLD
pin.
Set the Universal Library SIMULTANEOUS option for each device. Refer to the Universal Library User's Guide
for information on how to configure the USB-3110 with the Universal Library.
When the SYNCLD pin on the slave device receives the signal, the analog output channels on each device are
updated simultaneously.
An example of a master/slave configuration is shown here.
Figure 8. Synchronizing the update of multiple units