3
2. Cable routing and connections
NOTE:
Connections are not polarity sensitive.
Figure 5. DU3 cable routing and connections
3. DU3 Operational check
!
Inside the drive-thru service area, route the end of the smaller cable from the detector unit to the
control unit of the drive-thru timer system. Connect the cable wires to the vehicle detector input of
the control unit.
NOTE:
If the smaller cable from the detector unit is not long enough, up to 188 ft
(57 meters) of additional two-conductor (24 AWG) audio cable (or equivalent) can be spliced to it.
Cover splices with electrical tape or shrink tubing.
!
Route the larger cable coming through the wall from the DU3 to the AC power adapter. Connect the
wires of this cable to the two outer screws on the bottom of the AC adapter, as shown in Figure 5.
NOTE:
If the larger cable from the detector unit is not long enough, up to 188 ft (57 meters) of
additional two-conductor (16 AWG) cable (or equivalent) can be spliced to it. Cover splices with
electrical tape or shrink tubing.
!
Plug the adapter into an AC electrical outlet.
THE DU3 INSTALLATION IS NOW COMPLETE. THE DU3 SHOULD BE OPERATIONAL.
!
Go outside and listen for a clicking sound from the detector unit. It should click continually, each time
it sends out a pulse.
!
Have a vehicle driven up to the drive-thru service window. Check to be certain the DU3 has activated
the timer system when the vehicle arrived (approximately 2 second delay). Have the vehicle driven
away to be certain the timer system is deactivated (approximately ½ second delay).
NOTE:
The window of detection is factory set to detect an object between 1½ and 7 feet
(460 mm - 2.140 meters).