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vided by the terminal to power each reset mo-
tor).
6. The DPI board is not designed to directly drive
pump motors. We require the use of 30 amp
relays on the pump control (P1/P2) output cir-
cuits to keep the terminal electronics isolated
from high current draws by fuel pump motors
(QT Technologies can provide these relays, if
necessary). See Figures 5 & 6 for examples of
relay placement.
7. A dedicated two wire, tone dial telephone line
is required to allow the terminal to call for credit
card authorizations and incoming configuration
changes. This phone line cannot be used for
any other purpose since the fuel terminal is
programmed to answer incoming calls.
8. A static discharge ground reel sensor may be
installed for each pump. It provides a signal
when the customer pulls the ground clip from
the reel. This feature is used as a safety inter-
lock to help prevent static discharge related
fires in an aviation application. Call QT Tech-
nologies for details on ground reel sensors
(See Grounding Reel Sensor Installation -
page 10).
9. The terminal and dispenser components are
powered by 115 VAC line power. It is highly
recommended that a large (10 AWG) ground
wire is used in this conduit for lightening dissi-
pation purposes.
Referring to the enclosed wiring guide &
and schematic ensure that all high voltage
circuits are delivered through the appropri-
ate underground conduit to the terminal
location. Typically 1/2" and a 3/4" rigid
conduit is run from each dispenser directly
to the pedestal. In addition a 3/4" rigid con-
duit is typically run from the pedestal to the
nearest electrical distribution box .
Be sure each high voltage line is labeled
correctly with both the signal name and
dispenser number. Do not mix high volt-
age and low voltage wires within the con-
duits (unless low voltage wire is shielded)
as mixing may cause unreliable system
operation. Minor variations may exist such
as the location of the main pump motors.
Contact QT Technologies for assistance if
you are unsure about your particular appli-
cation.
Figure 3—
Dry contact switch schematic - gas station style dispensers resemble the diagram on the left - the dia-
gram on the right is the minimum necessary for the M3000 dispenser interface.
R1
C1
Reset
Motor
Neutral
Handle
R1
C1
Handle
Reset Motor
or
Mimic Switch Circuit
