Gasboy CFN Series Diagnostic Manual - Manual (Page 199)

Pump Control Unit
12/26/02 6-9
PUMP CONTROL EXPANDED MULTIPLEXED (EXPMUX) CPU PCB (C05837)
The Expanded Multiplexed CPU PCB is the latest version of the CPU PCB used in the GASBOY
pump control unit. It replaces the CMOS CPU PCB. This board provides the following features:
•
monitors the pulser inputs for four pumps
•
processes and stores all pump control unit data (contains a rechargeable battery for data
retention during power failures)
•
communicates to the CFN site controller via the RS-422 line
•
provides diagnostic LED's to monitor operation of the unit
•
provides self-test capabilities without the use of the CFN site controller
•
individual control of fast, slow, and submersible relays (not yet supported)
•
leak detect delay for submersible pumps (not yet supported)
•
monitors the battery status from the power supply (not yet supported)
This drawing shows the EXPMUX CPU
PCB orientation in the pump control unit.
When the EXPMUX CPU PCB is used with
a Pedestal Pump Control I/O Board, the
EXPMUX PCB must be in slot 3 (P5). Do
not try to force it into slot 2 (P4).