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The DU3 is a vehicle detector unit with self-contained
electronics, designed for use with a drive-thru timer
system. It should be installed at the service window, not
at the menu board or speaker post.
Installation of the DU3 requires only one hole to be
drilled through the wall for cable routing, and four
screw holes for mounting the detector unit on the
outside wall of the building, near the drive-thru service
window. Its cables will be routed to the AC adapter and
the Timer Signal Processor (TSP).
Installation of the DU3 should take approximately one
hour. Follow these instructions.
Parts List
The following parts are included with the DU3. As the
items are unpacked, check them against the packing
slip. If any item is missing or damaged, contact your
HME sales representative.
•
Detector unit with 12 ft. (3.66 meter) cables
•
AC to DC Adapter
•
Mounting hardware
Tools Required
Be certain you have the items listed below before be-
ginning the DU3 installation.
•
Tape measure
•
Phillips (cross point) and standard (slotted)
screwdrivers
•
Electric drill with ½ inch (13mm) and ¼ inch
(6mm) bits to drill the mounting surface (wood,
cinder block or metal) where detector unit will
be installed
•
Electrical tape (to insulate splices)
•
Flat nose pliers, and other standard hand tools
such as cutters, wire strippers, etc.
HM ELECTRONICS, INC.
2848 Whiptail Loop, Carlsbad, CA 92010 USA
Phone: 1-800-848-4468
Fax: 858-552-0172
Website: www.hme.com
Email: support@hme.com
Installation Guide
DU3 ULTRASONIC VEHICLE DETECTOR
DU3 Detector Unit
Service Window
Figure 1.
Typical DU3 installation site
Figure 2.
Fig. 1
DU3 detector unit
HME# 400251
Rev E 02/13/25
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Table of Contents
Related Manuals for HME DU3
Summary of Contents for HME DU3
- Page 1 It should be installed at the service window, not at the menu board or speaker post. Service Window Installation of the DU3 requires only one hole to be drilled through the wall for cable routing, and four screw holes for mounting the detector unit on the outside wall of the building, near the drive-thru service window.
- Page 2 Drive-thru lane Curb Top View Front View Figure 3. Typical DU3 position near drive-thru service window • Drill a ½ inch (13mm) hole through the wall at the location where the detector unit will be mounted. • Hold the unit centered over the hole, against the outside wall, and mark the wall through the four holes at the corners of the unit.
-
Page 3: Cable Routing And Connections
Route the larger cable coming through the wall from the DU3 to the AC/DC power adapter. Use your preferred splicing method or a flat nose pliers and the blue 3M tap connectors (included with DU3 package) to splice the 16 AWG wires from the large cable to the 18 AWG wires from the AC/DC power adapter, as shown in Figure 5 (the black wire from the large cable splices to the black wire from the power adapter, while the white wire from the large cable splices to the red (or white) wire from the power adapter). -
Page 4: Troubleshooting Checklist
4. TROUBLESHOOTING AND CORRECTING PROBLEMS Troubleshooting Checklist Problem Probable Cause Solution No clicking sound is heard from DU3 AC/DC adapter is not properly con- Be certain the larger cable from detector unit. nected. detector unit is properly spliced and making good contact with the AC/DC adapter cable. -
Page 5: Specifications
Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense. CAUTION: Changes or modifications not expressly approved by HME could void the user’s authority to operate this equipment. -
Page 6: Installation Instructions
3M product, regardless of the legal theory asserted. Electrical Markets Division 6801 River Place Blvd. A copy of this guide and additional information can be found under HME Accessories>Vehicle Detectors by scanning this QR Austin, TX 78726-9000 code or going to: https://www.hme.com/qsr/drive-thru-user-manuals/ 800-626-8381...
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