Power Terminal (+5V); Synchronizing Multiple Units - Measurement Computing USB-3100 Series User Manual

USB-3105 User's Guide

Power terminal (+5V)

The connection (pin 56) draws power from the USB connector. This terminal is a +5V output.
+5 V
Caution! The +5V terminal is an output. Do not connect to an external power supply or you may damage the
USB-3105 and possibly the computer.

Synchronizing multiple units

You can connect the
configuration and simultaneously update the DAC outputs of both devices. Do the following.
1. Connect the SYNCLD pin of the master USB-3105 to the SYNCLD pin of the slave USB-3105.
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
for information on how to configure the USB-3105 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.
Configure the SYNCLD
terminal pin (pin 49) of two USB-3105 units together in a master/slave
SYNCLD
option for each device. Refer to the Universal Library User's Guide
SIMULTANEOUS
D/A LOAD signal
Master
Slave
S
PMD-1608F
device
(terminal pin 49)
pin for output
Figure 8. Synchronizing the update of multiple devices
SYNCLD pin
Configure the SYNCLD
pin for input
16
Functional Details
Slave
device