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Most sensors provided by Vernier are auto-ID sensors. When you plug an auto-ID
sensor into SensorDAQ, the software will be able to identify it and set up the file
accordingly. Auto-ID information includes default settings for data collection rate,
length of collection, and calibration coefficients.
Most Vernier analog sensors send a raw voltage signal in the range of 0-5V on pin 6.
A few send a signal in the range of ±10V on Pin 1. The raw voltage signal is
converted to proper units using the sensor's calibration coefficients.
Most Vernier sensors that plug directly into SensorDAQ without an adapter are auto-
ID. However, the SensorDAQ can read a 0-5V or ±10V signal from many types of
sensors. To make the connection to SensorDAQ with a sensor without a BTA/BTD
plug, use an adapter (www.vernier.com/adapters/), or a bare BTA cable wired to your
custom sensor.
Vernier Digital Sensors
Examples of digital sensors are Motion Detectors, Radiation Monitors, Photogates,
and Rotary Motion Sensors. One digital sensor at a time can be connected to
SensorDAQ. The digital channel (DIG), which accepts British Telecom-style plugs
with a left-hand connector, is located on the opposite side of the analog channels.
The SensorDAQ's DIG Channel also accepts a Vernier Digital Control Unit. This is a
small box with a short cable that uses the DIG channel to provide output (up to 600
mA of current) for controlling electrical devices. For examples of how to use the
DCU and the other digital sensors in LabVIEW, see Appendix A.
Screw Terminal
SensorDAQ screw terminal connectors can be used for input or output. When used
for output, these connectors provide a limited current (see specs below); therefore, in
some cases you will have to provide an external power source. The +5V terminal can
be used as your voltage source. This source can only supply 200 mA maximum.
Note: A convenient option for running devices using digital output lines is the
Vernier Digital Control Unit (DCU). The DCU plugs directly into the DIG channel
and can supply up to 600mA of useful current to output lines.
The table below describes the signals available on the screw terminals.
Pin 1 = I/O1
Pin 2 = I/O2
Pin 3 = I/O3
Pin 4 = PWR (5.08V)
Pin 5 = GND
Pin 6 = I/O4
SensorDAQ User's Manual
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