3
INSTALLATION
If you’re replacing an existing board, begin at
Step 1
. If no previous VDB103/VDB103R board exists, begin at
Step 6
.
1 .
When handling the VDB103/VDB103R, wear an
anti-static wrist strap
to avoid electrical damage to the board.
2 .
Disconnect the drive-thru audio or timer system power adapter from its electrical outlet.
3 .
Disconnect the loop cable from TB1 on the existing board to be replaced.
4 .
Disconnect interconnect cable from its connector (P1) on the base station or control unit circuit board. Note the connector and
its location.
5 .
Remove the existing board by lifting it off the plastic standoffs that hold it in place.
6 .
Connect the loop cable to TB1 at the upper left corner of the VDB103/VDB103R. See
Figure 1
, above.
7 .
Position the VDB103/VDB103R 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 VDB103/VDB103R. See
Figure 1
for hole locations.
8 .
Connect the VDB103/VDB103R interconnect cable to P1, at the lower right corner of the VDB103/VDB103R. 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 on
Figure 1
.
9 .
Connect the other end of the interconnect cable to the circuit board in the base station or control unit per installation
instructions from the drive-thru audio or timer system.
h
If the installation instructions are not available, visit
to obtain the manual PDF file or call HME at 1-800-848-4468.
10 .
Reconnect the drive-thru or timer system power adapter to its electrical outlet.
11 .
During boot up, “
b
” (for ‘booting’) will display for a few seconds. The Display on the VDB103/VDB103R should then read “
0
”
or “
1
”, indicating that the loop is signaling properly. If the Display does not read “
0
” or “
1
”, be certain all connections are tight. If
it still does not indicate “
0
” or “
1
, page 6.
12 .
Drive a car onto the loop. The Dot on the Display should illuminate when a car is present over the loop.
P1 Pins:
3
(black) - Output/Sig
2
(red) - +12VDC
1
(shield) - GND
Holes for plastic
standoffs
Loop connector (TB1)
Display (reading “
0
”) Display Dot
Figure 1. Vehicle Detector Board
(VDB103/VDB103R)
NOTE:
Adjust switches as needed before installing the VDB103/VDB103R.
If it is necessary to change the functions of the VDB103/VDB103R, refer
to the DIP switch settings on the next page. Normally, no changes will be
required.
1 2 3
Holes for plastic
standoffs
J1 Pins*
Relay out 1
1 - NO1
2 - NC1
3 - COM1
Relay out 2
4 - NO2
5 - NC2
6 - COM2
*
VDB103R Only
