HME VDB102C User manual

Installation Guide
HM ELECTRONICS, INC.
2848 Whiptail Loop, Carlsbad, CA 92010 USA
Phone: [phone] Fax: [phone]
Website: www.hme.com Email: [email protected]
HME# PUB - 00187
Rev A 7/27/22
VDB102C & VDB102CR
VEHICLE DETECTOR BOARD
IMPORTANT: The following instructions cover the VDB102C and the VDB102CR Vehicle Detector Board. When
handling these boards, use proper grounding procedures to avoid electrical damage to the board.
INSTALLATION
1. Remove the drive-thru audio or timer system power adapter from its electrical outlet.
2. If the VDB102C/VDB102CR will replace an existing VDB101, do a, b, and c below. If not, skip them and go on
to the following step.
a. Disconnect the loop cable from TB1 on the VDB101.
b. Disconnect the VDB101 interconnect cable from its connector on the base station
or control unit circuit board. Note the connector and its location.
c. Remove the VDB101 by lifting it off the plastic standoffs that hold it in place.
3. Position the VDB102C/VDB102CR over the three plastic standoffs on the base station or control unit circuit
board and press it firmly until the standoffs snap through the holes on the VDB102C/VDB102CR. See Figure 1.
4. Connect the loop cable to TB1 at the lower right corner of the VDB102C/VDB102CR. See Figure 1.
5. Connect the VDB102C/VDB102CR interconnect cable to P1 at the upper left corner of the VDB102C/VDB-
102CR. See Figure 1. Be certain the plastic catches on the cable connector are aligned with the plastic catches
on the P1 connector. The color-coded connector wires must also match the pin positions shown in Figure 1
below. Connect the other end of the interconnect cable to the circuit board in the base station or control unit
according to installation instructions from the drive-thru audio or timer system. If the installation instructions are
not available, call HME at 1-800-848-4468.
6. This step is only for the VDB102CR (for VDB102C, skip to step 7): If any external equipment will be used that
requires a vehicle detect signal to operate, connect it to J3, Relay out 1 or Relay out 2, see Figure 1.
7. Reconnect the drive-thru or timer system power adapter to its electrical outlet.
8. Be certain the LED on the VDB102C/VDB102CR is lit when a vehicle is on the loop. If it is not, be certain, that
all connections are tight. If it is still not lit, call HME at 1-800-848-4468.
NOTE: If it is necessary to change the functions of the VDB102C/VDB102CR, refer to the DIP Switch Settings on
page 2 of this sheet. Normally, no changes will be required.
Figure 1. VDB102CR
(Relay K1 and connector J3 are not
populated on the VDB102C board.)
P1 Pins:
3 (black): Output/Sig
2 (red): +12 VDC
1 (shield): GND
J3 Pins (VDB102CR only)
Relay out 1
1 - NO1
2 - NC1
3 - COM1
Relay out 2
4 - NO2
5 - NC2
6 - COM2
Plastic Standoff
Loop Connector
Plastic Standoffs LED
3 2 1
NOTE:
Adjust switches as needed before
installing the VDB102C/CR. See
page 2 for DIP Switch Settings.

©2022 HM Electronics, Inc. All rights reserved.
2
DIP SWITCH SETTINGS
Before installing the VDB102C/VDB102CR, the follow-
ing six functions can be set by switching/moving the
switches as indicated in Tables A through F below. Refer
to Figure 2.
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
ON
OFF
ON
Q3
CR5
C13
S1
Figure 2. S1 DIP Switch
Switch #1 Vehicle Presence Auto Reset
OFF None
ON 20 Minute *
Switch #2 Turn-On Sensitivity
OFF Normal (2 Hz) *
ON Reduced (3 Hz)
Switch #3 Switch #4 Turn-Off Threshold
OFF OFF Extra Low (15%)
ON OFF Low (25%)
OFF ON Normal (35%) *
ON ON High (40%)
Switch #5 Vehicle Present Switching Test
OFF Diagnostic off, normal operation *
ON Diagnostic on, 10 sec on, 10 sec off
Switch #6 Switch #7 Output Delay
OFF OFF 6 second
ON OFF 4 second
OFF ON 2 second
ON ON None *
Switch #8 Output Pulse
OFF 0.5 second
ON Steady (no pulse) *
Tables A - F
* Factory Setting
SELF DIAGNOSTICS
If an abnormal condition with the loop or oscillator
occurs, the LED will indicate one of the following con-
ditions (see Table G). There is no Vehicle-Present signal
generated during the self-diagnostics.
Problem LED Blink Rate
No oscillator (< 2 kHz)
or Shorted loop (< 2 kHz)
1 blink and a pause
Open loop (< 10 kHz) 2 blinks and a pause
Out of range (10-20 kHz) 3 blinks and a pause
Table G
RESET PROCEDURE
With no vehicle present over the vehicle detector loop,
press the reset switch in the base station or timer for 1
second, or unplug the power cable for 1 second. The
LED will go on for 3 seconds. Reset is completed when
the LED goes off.
TROUBLESHOOTING
Turn-On Sensitivity:
• Set to Reduced (3 Hz) to help prevent false turn-on
when the frequency drifts or varies due to a bad
loop.
Turn-Off Threshold:
• Set to High (40%) if run-on between cars occurs at
Normal (35%).
• Set to Extra Low (15%) or Low (25%) to compensate
for improperly positioned loops.
• Set for the highest percentage possible. Check for
run-on or dropouts and set for best operation.
This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accordance with
the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interfer-
ence in which case the user will be required to correct the interference at his own
expense.
Waste Electrical and Electronic Equipment (WEEE)
The European Union (EU) WEEE Directive (2012/19/EU) places
an obligation on producers (manufacturers, distributors and/
or retailers) to take-back electronic products at the end of their
useful life. The WEEE Directive covers most HME products
being sold into the EU as of August 13, 2005. Manufacturers,
distributors and retailers are obliged to finance the costs of
recovery from municipal collection points, reuse, and recycling of
specified percentages per the WEEE requirements.
Instructions for Disposal of WEEE by Users in the European Union
The symbol shown below is on the product or on its packaging which indicates
that this product was put on the market after August 13, 2005 and must not be
disposed of with other waste. Instead, it is the user’s responsibility to dispose of
the user’s waste equipment by handing it over to a designated collection point for
the recycling of WEEE. The separate collection and recycling of waste equipment
at the time of disposal will help to conserve natural resources and ensure that it is
recycled in a manner that protects human health and the environment. For more
information about where you can drop off your waste equipment for recycling,
please contact your local authority, your household waste disposal service or the
seller from whom you purchased the product.