- 1 -
TC-26B Vehicle Detector
TC-26B Vehicle Detector
INSTALLATION INSTRUCTIONS
Section 1
General Description
The Model TC-26B is a microprocessor controlled
vehicle detector with a selectable range (long or short).
It is designed to trigger the operation of a traffic
controller. The TC-26B will only respond to motion in
one direction (approach or depart only—selectable)
which makes it ideal for long-range detection at
intersections. A microprocessor analyzes the reflected
microwave energy and responds to motion in the proper
direction. The TC-26B generates an extremely low
power microwave beam aimed to cover the same area
normally covered by a loop detector system. It is less
expensive to install and less susceptible to damage and
malfunction from ice, salt and heavy vehicular traffic.
The TC-26B operates on much the same principle that
police radar uses. The unit transmits a low power
microwave signal, some of which is reflected by a
moving target, such as an automobile or truck. Larger
vehicles, such as semi-trucks, reflect more energy than
automobiles and can be detected at further distances.
Since the TC-26B uses microwave signals as its means
of detecting a moving target, it is not affected by air
motion, temperature and humidity changes, or high
frequency sounds.
Section 2
Installation
The TC-26B vehicle detector will perform best when it is
aimed directly at traffic. This can be accomplished by
mounting the unit at the typical mounting height of 14’ to
24’ and aiming the sensing head so it can “view” the
traffic coming toward or moving away from the unit.
Side-fire mounting is also acceptable.
The TC-26B is mounted with 2 lag bolts through 2 - ½”
prepunched mounting holes, or by banding to the poles.
To remove the fastening bracket from the sensor, take
out the ¼-20 bolt holding the bracket to the hinge. Using
the bracket as a template for locating screw holes, mark
and drill the pole or band the bracket and refasten the
sensor to the bracket with the ¼-20 bolt removed earlier.
Wiring -
Operating voltage is 12V to 24V AC or DC and is usually
supplied through a transformer. Current consumption of
the unit is 0.075 Amps.
NO AMPLIFIER REQUIRED!
NOTE:
18V, 20VA transformer included
Wiring of the cable is as follows:
Red & Black = 12V to 24 V AC/DC (no polarity)
Brown = Relay COM
Org = Relay N.O.
Yel = Relay N.C.
NOTE: Relay contact designation is with power
applied.
CAUTION: Do Not apply 120V AC primary
power to the transformer until all
secondary wiring is complete.
NOTE:
When power is applied, allow 30 Seconds of
warm-up before testing sensor
For more information, call us toll-free at (800) 842-2545.
Alignment
Align the TC-26B by adjusting the range control and the
aiming angle. The range control allows the detection
pattern to be varied to sense vehicles at a maximum of
200’ for cars, and 350’ for semi-trucks or other large
vehicles. The Direction switch allows the sensor to
detect traffic traveling either toward or away from the
sensor. Please see
Figure 1
for proper switch settings.
To adjust the sensor’s head angle, loosen the ¼-20
hinge bolt. This allows vertical movement of the TC-
26B. When alignment is complete, make sure that all
bolts and screws are tightened.
Operation
REMINDER:
When power is applied, allow 30
Seconds warm-up before testing sensor.
!
!
!
