Phase Selector Installation In Nema Cabinets Using 760 Or 1040 Card Rack - OPTICOM 764 Installation Manual

6 Phase Selector Installation in NEMA Cabinets using 760 or 1040 Card Rack

If you will be using the phase selector in GPS only mode a Model 760 or 1040 card rack may be used. If
you are using the phase selector in IR or IR/GPS simultaneous mode a Model 760 card rack should be used.
Model 1040 card racks have no connection points for IR detectors.
NEMA controllers usually require a card rack. The phase selector plugs directly into the card rack which
then sits on a shelf in the traffic controller cabinet. The card slot in the Card Rack is intended to be used
with a single phase selector. The edge connector is wired to connector J1 on the card rack front panel,
which is connected (through the 9-pin harness) to the traffic controller. The card rack harness is connected
to 120 VAC to power the phase selector. The preempt outputs are then wired to the appropriate preemption
input terminal in the controller cabinet. See the cabinet drawing to determine the proper location.
The phase selector supplies four outputs to the traffic controller.
Additional outputs are available on the model 768 auxiliary interface panel. See section 9-5 for details on
the additional outputs if needed.
The outputs from the phase selector are connected to the preemption inputs of the traffic controller. Each
phase selector output must be connected to a separate controller preemption input. Consult the manual for
your controller to determine if the preemption inputs are handled with the same priority. For some traffic
controllers, preemption inputs one and two are intended for railroad and draw bridge preemption and are
given precedence over the rest of the preemption inputs.
When programming your priority control routines, it is important to use values that will allow the traffic
controller to respond to a priority control request as quickly and safely as possible. If the routines are not
programmed to respond quickly enough, the requesting vehicle may not receive a green light in time to
travel through the intersection safely.
WARNING
This procedure may expose you to AC voltage
and the risk of electric shock or electrocution.
Turn off the AC mains and use accepted and
recognized safety precautions to avoid
exposure to the risk of electric shock or
electrocution. Electric shock may cause
severe injury or death.
WARNING
Improper or incomplete programming of the
traffic controller may cause improper
operation of the traffic signals, which may
result in accidents and/or injuries. To avoid
this problem, verify that the operation of
the traffic controller is appropriate for your
needs before, during, and after actuation of
the priority control inputs. Improper
operation of the traffic signals may result in
unsafe driver action.
Intersection Equipment Installation Instructions
24