This is the intercom setup as successfully tested at the
Waste Management Crystal Lake Transfer Station for the purpose of
elminating the need to have a person assigned to route incoming trucks. This intercom kit
includes the basic items needed to configure two loaders with indoor
intercoms, and one outdoor truck station. Both the indoor and outdoor
intercom units have been modified with increased volume levels for the
noisy locations they operate in.
When trucks activate a photoelectric beam sensor, the
unit automatically makes a call to the loader. The outdoor unit has been
modified with an auto-answer feature so the loader driver can then press
a button on the unit inside his cab, which activates the auto-answer
feature on the intercom by the truck. Therefore the driver can speak into
the outdoor unit totally handsfree with no button presses required.
This kit includes:
1 outdoor unit for arriving trucks
1 antenna, cable, and key kit for the outdoor unit
2 indoor units for loaders
2 antennas for loaders (requires an L bracket that
is not supplied)
2 antenna cable extensions (used for loader
In the Related Products and Accessories to the right you will also
see other components you may need for a system. Since the truck
cab height varies between 76 inches for smaller trucks
and 89 inches for larger trucks, it was found that placing the intercom
at 72 inches high worked out well. There is a 72 inch pole or you can mount
shorter poles on top of concrete pads to reach that height.
If you need solar power there are two options available
for the outside unit. If you are in a very sunny location like
California or Arizona, you may be able to get by on the 30-Watt unit.
The Crystal Lake Transfer Station in Illinois has between 200 to 300 trucks a day
and is using the 50-Watt system. They have not had any power problems
with it. The more trucks you have coming in daily, the more power will
You can also power the outside unit from any 12-24 volt
AC or DC power supply. There is one in the Related Products and
Accessories that you can use.
The units in the loaders are powered through an included
12 volt DC cigarette lighter, or they could be wired directly into the
loaders electrical system.
If you want the outdoor intercom to automatically call
the loaders, you will need to purchase the Industrial Grade Reflective
Photo Sensor. It is powered by 12 volts so you can use the same power
supply as used for the intercoms. It has a range of up to 25 feet so the
reflector must be placed opposite the truck path and it should be placed
high enough so the wheels don't activate it twice.
This Full Duplex Wireless Gate Intercom provides
crystal clear two-way audio communication with simultaneous talk and
listen, just like a telephone conversation. It has a direct line of
sight range of up to 4,000 feet.
Its full duplex speakerphone capability has background
noise immunity so when noisy trucks or other vehicles pull up to it,
clear voice communication can still take place.
The unit has dual built-in switch relays that can be
used for remotely controlling the gates or other devices from the inside
base station intercom. There is also an optional input for a Request-to-Exit
button or vehicle loop detector that can open the gate when activated.
Another input can be used for "auto calling" the inside station when a
vehicle loop detector or motion detector detects someone arriving at the
The intercoms have excellent
interference immunity from other wireless devices. Their wire-free installation avoids costly
trenching and they are designed to easily utilize solar panels for power in
Multiple units can be used to comprise a single system,
which is ideal for large facilities.
The "Call" Switch connections on the Outside unit
are used to connect a motion or photo beam sensor. When the sensor
is tripped, the unit automatically goes into transmit mode. A
ringing tone will sound on the Indoor unit(s) (and Outdoor) and then
whichever indoor unit answers the call, the call will become private
between those indoor and outdoor units.
The "Exit" Switch connections are used like the Call
switch, but the sensors are placed on the exit side of a door or
gate. When the sensor is tripped, the Inside unit will be alerted.
There are two relays or switches inside the Outdoor
unit that can be used to activate a gate or door opener, turn on a
light, ring a bell, or whatever you want. These are used to activate the relay. If
you have multiple Outdoor units, only the relays on the unit calling
in are activated.
An Indoor unit can only place a call to one Outdoor
unit set to Access Point Number 1, but up to 9 Outdoor units can
call any number of Indoor units and the Indoor units can respond.
If the "Call" button is pressed during
communication, the unit will hang up. Otherwise, talk time is 4
minutes (fixed) after which the unit will hang up.
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download and print the:
Waste Management Installation Manual
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