Gasboy CFN Series SCII Installation Manual - Manual (Page 11)

CFN Series System
2-4 05/28/03
PUMP CONTROL UNIT (PCU)
Description
The pump control unit (PCU) controls most mechanical pumps and some electronic pumps. The
unit is controlled by a microprocessor and communicates to the site controller via the RS-485 loop.
Each pump control unit can control up to four pumps or remote dispensers. There are two
different versions of the pump control unit: the retail version (Weights & Measures) and the fleet
version. Hardware features on the retail version include a battery backup, three solid state relays
for each pump or remote dispenser (slow flow, fast flow and submersible pump), manual override
switches, and diagnostic capabilities. The fleet version does not have a battery backup, and has
only two solid state relays for each pump and remote dispenser. Field wiring connections are
made to the unit via easy to wire terminal blocks.
The pump control unit can be ordered mounted in a wall-mount box (standard), in the island card
reader’s post, or as a standalone unit to be located on the island.
Location
The wall mount version of the pump control unit must be located in an area protected from direct
contact with weather. Do not install over a hazardous location. The post and standalone version
of the pump control unit should be located on the fueling island, no closer than 18" from the
nearest dispenser. The unit is designed for an operating temperature of -40
o F to 104 o F with a
relative humidity of 2% to 99% non-condensing.