CBLé System Guidebook 17
About the Probe Connections
Input and Output Channels
Three analog inputs, an ultrasonic motion detector input, a digital input,
and a digital output let you connect various probes and sensors to the
CBL. With the variety of probes, you can measure temperature, light,
voltage, sound, force, motion, pH, and more.
Indicators in section a of the display (page 14) show you when
CH1
,
CH2
,
CH3
,
SONIC
,
DIG IN
or
DIG OUT
have been set up. More than one
probe may be connected and collecting data at the same time.
The connectors for analog, digital, and ultrasonic probes are different to
make sure that you do not plug a probe into the wrong channel. For
example, you cannot plug a motion detector (
SONIC
) into an analog or
digital channel, or a voltage probe (analog) into a digital or ultrasonic
channel.
Additionally, the labeling on
CH1
,
CH2
, and
CH3
is green and matches
the green band on the CBL
DIN
adapter and TI temperature, light, and
voltage probes. The labeling for
SONIC
is red and matches the red band
on the CBL
RJ-11
adapter. The labeling for
DIG IN
and
DIG OUT
is blue
and matches the blue band on the cable in the CBL digital probe kit
(page 85).
Note: The included voltage probe (for ±10 Volts) can only be used on
CH1
and
CH2
.
Analog Inputs
CHI
,
CH2
, and
CH3
are analog inputs for probes that produce a voltage
output such as for sound or force. These channels also can measure
resistance. Only
CH1
has provisions for measuring period and frequency.
CH1
and
CH2
are on the top of the CBL;
CH3
is on the left side of the
unit.
IMPORTANT: It is very important that the ground connections of the
analog inputs are not connected to different potentials. These ground
connections are all in common. Connecting the grounds to different
potentials may damage the CBL.
Ultrasonic Motion Detector Input
The ultrasonic motion detector input lets you connect a motion detector,
such as the CBRé (Calculator-Based Rangeré), to measure distance.
The motion detector (
SONIC
) channel is on the left side of the unit next
to
CH3
.
Digital Input and Digital Output
The digital input and digital output let you connect the CBL to 0–5 Volt
binary signals. The digital input (
DIG IN
) and the digital output
(
DIG OUT
) channels are on the right side of the CBL.
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