EQUIPMENT INSTALLATION
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4.5 Optional External Vehicle Detector Installation
h If an external type vehicle detector will be used, install it according the installation
instructions provided. Connect it to the base station according to the appropriate wiring
diagram listed in Section 14, pg. 102. Note that the connections are different for internal and
external vehicle detectors.
h For an external vehicle detector in Lane 1, route a cable from the detector’s output to the J6
connector on the audio board in the EOS|HD base station. For an external vehicle detector
in Lane 2, route a cable from the detector’s output to the J14 connector on the audio board.
h Remove 4 inches (100 mm) of outer insulation from the end of the cable at the base station,
and strip about ¼ inch (6 mm) of insulation from each of the color coded wires coming from
the cables.
h Connect the color-coded wires to connector J6 and/or J14, pins 3 and 5 for negative vehicle
detection according to the wiring diagrams listed in Section 14, pg. 102. Be sure the wires are
fully inserted into each connector plug to prevent shorting the wires.
4.6 Optional HME Vehicle Detector Board (VDB) Installation
To install an HME VDB in the base station, follow the instructions below.
Note: In tandem systems, two VDBs will be installed in the base station, one at the “VDB LANE
1” position for Order Point #1, and one at the “VDB LANE 2” position for Order Point #2.
1. Open the base station by pushing down on the latches on top of the cabinet and VERY
CAREFULLY guiding the top of the cover toward you and downward.
2. Position the three holes in the VDB over the three plastic standoffs at the upper right side (inside
the base station) in the position shown on the respective wiring diagram listed in Section 14, pg.
102. Press on the VDB until the tips of the three standoffs snap through the holes in the board.
3. If there is a switcher board, connect the cable assembly enclosed with the VDB to the P1
connector on the vehicle detector board. Connect the other end to the J6 connector on the
respective LANE 1 or LANE 2 switcher board as shown on the wiring diagrams listed in Section
14, pg. 102.
4. If there is no switcher board, connect the cable assembly to the P1 connector on the vehicle
detector board. Connect the other end to the J10 connector (or J20 for Lane 2) on the audio
circuit board as shown in the wiring diagrams listed in Section 14, pg. 102.
5. Route a cable from the underground loop(s) to the TB1 terminal block on the Vehicle Detector
Board(s).
6. Close the cover on the base station, and lock it by pushing until it latches.
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