Pulser, Pulse output, Rs-485 – Gasboy 9120K Series Installation User Manual
Page 30: Pulser pulse output rs-485, Refer
Control Lines
Pulser
Page 26
MDE-4567C 9120K and 9820K Series AST Pumps Installation and Operation Manual · September 2008
Pulser
The pulser supplies a DC output, which is provided to indicate the quantity dispensed. Pulsers
are optional and are only used when monitoring of the pump unit operation is desired (as when
used with a fuel management system).
The pulser transmits one electrical signal (pulse) for each predetermined amount of fuel
dispensed. The signal is received by the external monitor (fuel management system) which
keeps a running total of the quantity of fuel being dispensed during each transaction.
All of the pulsers in the 9X20K Series are operated with DC voltages. These pulsers include
the reed pulser which outputs 10 pulses per unit of measure and the electronic pulsers which
are available at 100 pulses per unit of measure. The pulser type should be selected according to
the monitoring equipment, the application, and the regulations that must be met.
Refer to the wiring diagrams in
on
for pulser wiring.
Pulse Output
The Pulse Output option provides a DC pulser output to indicate the quantity dispensed. This
is an open collector output. This output can sink up to 150 mA DC at voltages up to 24 VDC.
The pulse rate can be configured by a sealable DIP switch for rates of 1, 10, 100, 250 and 500
pulses per gallon or 1, 10 and 100 pulses per liter. This output should only be used when
monitoring of the unit's operation is desired.
RS-485
When the pumping unit includes the optional RS-485 interface, RS-485 lines are provided.
This interface allows the user to connect a Gasboy CFN Series System directly to the 9820K
Series pumping unit.