Gasboy Atlas Fuel Systems Installation Manual - Manual (Page 24)

Control Lines for Atlas Electronic Series Light Feed
Page 4-6 MDE-4331M Atlas® Fuel Systems Installation Manual · September 2014
Light Feed
The light feed is a 115 VAC input required to power fluorescent lights. In a site configuration
using multiple remote dispensers (or pumps), the power for lights of up to eight units can be
supplied by one breaker. It is recommended that this be on a separate breaker from the

micro/heater feed to reduce electrical noise and allow separate control of lights.
Light Neutral
The light neutral is a return line for AC current from lights to the breaker panel. When a
separate breaker is not used to control lights, the light neutral is attached to the micro neutral.
Pulser
When the dispensing unit includes the optional pulser interface, a pulser output is provided.
This pulser output provides a DC output that indicates the quantity of product dispensed. The
pulse rate can be configured by a sealable Dual In-line Package (DIP) switch for rates of 1, 10,
100, 250, or 500 pulses per gallon, or 1, 10, 100, or 250 pulses per liter. For the Atlas
commercial electronic pump, pulse rates are 1, 10, 100, 250, or 500 pulses per gallon, or 1, 10,
or 100 pulses per liter.
The output is an open collector transistor capable of sinking up to 100 mA DC at voltages up
to 24 VDC. The DC ground for the circuit comes from the FMS. Since the transistor switches
between ground and high impedence, the installer must provide a voltage reference when the
transistor is in the high impedence state. This reference voltage is provided by a pull-up
resistor installed at the FMS between the pulser input and reference voltage. The value of this
resistor is calculated based on the voltage and current requirements of the FMS pulser circuit.
Figure 4-1: Pulsers
V+ (24 VDC Maximum)
Pulser #1 Input (100 mA Maximum)
Pull-up Resistors not
supplied with 9800
Pulser #1 Input (100 mA Maximum)
FMS
Ground
Pulse 1
Pulse 2
Return
Black
White
Green
Gasboy 9800 Pump I/F PCB
Leave Capped in
9800 Junction Box
(J-box)
TLP627
U4
P1
Red