MDE-4813D CFN PLUS Installation Manual
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February 2018
48
3-8.3. Mechanical Pump - Required Connections
This paragraph describes the required wiring connections between the mechanical pump and the
CFN PLUS.
and show a schematic diagram of the connections between the CFN PLUS
and the mechanical pump components.
shows a detailed wiring diagram between the
CFN PLUS terminal block and the pump components.
Pulse Input Wires:
The dispenser outputs pulses to the system by means of the Pulser unit,
installed inside the pump head. The Pulse rate per volume (liter/gallon)
is determined by the Pulser unit. It is programmed as a “factor” by the
Head Office controller.
Handle Status Input
Wires:
The handle signal is used to signal the system that the pump is “In Use”
mode. When the dispenser handle is lifted this contact will close. This
should signal the system that the pump is “In Use” or that the
transaction ended.
Authorization Output
Wires:
The dispenser requires an authorization signal from the CFN PLUS to
start a sale transaction. Without this authorization signal, the electric
valve (or pump) will not open and the sale transaction will not begin.
The CFN PLUS sends the authorization signal in the form of an AC
power signal to the valve. When the dispenser receives the authorization
signal, fuel is flow.
