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Mechanical Interface Option
Control Lines for Gasboy 9800 or 9820 Electronic Pumps/
Dispensers
Note: This section pertains to 9800 electronic pumps/dispensers running as mechanical units
Descriptions of the control lines are provided to familiarize the installer with the control inputs
and outputs that are used to control the Series 9800 and 9820 dispensing units. Reading these
descriptions will give the installer a better working knowledge of the system and aid in
planning the site wiring.
The Series 9800 may be provided for use with 230 VAC power for international applications.
The operating voltage for control lines to these units is shown in parentheses as (230 VAC
Int'l).
Ground
To ensure proper operation of the equipment and provide the necessary safety factors, a good
ground line must be provided. A ground wire (preferably green) must be connected between
the ground wire of the system and the main electrical service panel. One (1) earth ground
connection is required per unit. The ground rod is to be a solid, corrosion-resistant conductor
and must be installed at the main electrical panel in accordance with the National Electrical
Code. It should be properly tied into the ground bus strip of the panel. We recommend the
neutral and ground bus strips be bonded together (unless prohibited by local codes).
Micro Feed
The Micro Feed is a 115 VAC (230 VAC Int'l) input required to power the microprocessor of
the register's electronics. This power must always remain on and must be on a separate
breaker from the control lines (Control/Pump Motor Feed or Control/Subm Feed - Side 1, Side
2). This must also be on a separate breaker from the fluorescent lights to reduce electrical
noise and allow for separate control of the lights. In a site configuration using multiple
dispensing units, the power for the microprocessors of up to 8 units can be supplied by one
breaker.
Micro Neutral
The Micro Neutral is a return line for AC current from the microprocessor of the dispensing
unit to the breaker panel.
Control/Pump Motor Feed
The Control/Pump Motor Feed is a 115 VAC (230 VAC Int'l) input which is required to power
and authorize the control line. This line is used to provide authorization for the dispensing unit
(when enabled through the DIP switches). A resistor assembly must be installed between the
Control Feed line and Feed Neutral to prevent false triggering of the authorization input. The
resistor assembly is 8.2K OHM, 10 Watt (P/N C05818) for 115/230 VAC domestic and 30K
OHM, 10 Watt (P/N C06683) for 230 VAC international wiring. Two Control/Pump Motor
Page 38
Control Lines for Gasboy 9800 or 9820 Electronic Pumps/Dispensers
(standalone operation). This scenario would only be used when controlling two pumps:
one mechanical and one electronic running as mechanical, from a single TopKAT
system.
MDE-4319A TopKAT Fuel Managment System Installation Manual · November 2005
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