Intersection Equipment - GTT Opticom GPS System Installation Manual

10

3.1 Intersection Equipment

The Opticom™ GPS System intersection
equipment has two styles of Radio/GPS units
available.
The first is the Model 1010, which is a compact,
weather-resistant, Radio/GPS unit containing a
GPS receiver with antenna and a 2.4 GHz
transceiver with antenna. This model is typically
mounted on a traffic pole near the traffic cabinet.
The second is the Model 1012 Radio/GPS unit,
which contains a GPS receiver, a 2.4 GHz
transceiver and a separate Radio/GPS antenna.
This model is mounted in the traffic cabinet with
the antenna mounted on the roof of the cabinet.
Both models of the Radio/GPS unit are connected
to a phase selector via an 11-conductor radio/GPS
cable.
The phase selector can be installed directly into
an input file of a traffic controller equipped with
priority phase selection software. The phase
selector can also be installed directly into virtually
any other traffic controller equipped with priority
phase selection inputs and related software.
When input file space is not available, a card rack
is required. The phase selector is powered by +24
VDC. A power supply in the card rack or an
external power supply provides the +24 VDC.
The phase selector processes the signal from the
radio/GPS unit and activates outputs which are
connected to the preemption inputs on the traffic
controller. There are four channel outputs
accessible on the rear connector of the phase
selector and up to 12 additional channel outputs
accessible on the front of the phase selector.
Each channel output delivers a constant output for
high priority activation, and a pulsed output for
low priority activation. A high priority signal
received on a channel will override any low
priority activation. In certain modes of operation,
outputs may be activated that are dependent on
the state of the requesting vehicle's turn signal.
Another mode provides separate outputs for high
priority and low priority. The use of an auxiliary
interface panel is required to access these
additional modes and outputs.
Intersection Equipment Installation Instructions
This manual describes the installation of the
radio/GPS unit, a card rack (when required), and
installation of a phase selector into either a card
rack or a Type 170 input file.
Figure 3-1 shows the phase selector installation
components including the phase selector, card
rack, input file, auxiliary interface panel, and the
wiring harnesses and cables. The 9-pin harness
connects the card rack to the traffic controller. The
communication cable connects the phase selector
to a PC. Additional communication connections
are available on the auxiliary interface panel. The
auxiliary interface panel cable connects the phase
selector to the auxiliary interface panel. The
auxiliary harness connects green sense inputs to
the phase selector. The radio/GPS cable connects
the phase selector to the intersection radio/GPS
unit. A customer-supplied 24 VDC power cable
connects the phase selector to an external power
supply, which is required when the phase selector
is plugged directly into an input file of a traffic
controller cabinet that does not have 24 VDC on
the edge connector.
NOTE: Illustrations and connections to the
traffic controller may not be exactly as shown
or described in this manual. Refer to the
controller wiring diagram for correct terminal
connections.