Gasboy CFN Series Site Controller III - Manual (Page 13)

MDE-4298D CFN Series Site Controller III Installation Manual · September 2009 Page 9
Purpose System Layout
3 – System Layout
Purpose
The purpose of this section is as follows:
• It provides a basic description, location, and environmental requirements of the CFN
components. Dimensional drawings are included for the components manufactured by
Gasboy.
• It covers conduit requirements and provides conduit layout examples for basic system
configurations. Careful planning for the layout of the site will help you eliminate possible
problems with the startup of your system and will ensure continued, reliable system
operation.
SC III
Description
The SC III is the heart of the CFN System present at the fueling site. It controls and allows
interaction between the automated fueling equipment, including electronic pumps, pump
control devices, card readers, registers, tank monitors, and customer-activated terminals. The
unit uses advanced microprocessor technology and incorporates multiple hardware and
software safeguards.
The standard SC III unit consists of a hard disk drive for mass storage of data, a 3-1/2” disk
drive, and a CD-ROM drive. The SC III provides the following ports:
• Ports 1, 4, 5, and 6 - These are local RS-232 ports. They can accept a modem, printer, or
other devices.
• Port 3 - Currently this port is not used.
• Loop 1 - It is an island port and connects to the RS-485 junction box. All Gasboy devices
(PCUs, ICRs, and so on) must connect to this port.
• Loop 2 - It is an alternate island RS-485 port. The factory setting for this loop is Two-wire
(RS-485 half duplex), which enables communication to Tokheim Dispenser Payment
Terminals (DPT). For additional information on Tokheim DPT wiring, refer to C09146
Site Controller Pump Interface Manual.
If a Two-wire device (for example, DPT) is connected to a loop that is set for
Four-wire, the SC will not operate correctly. Four-wire devices on a Two-wire loop
may not communicate with the SC. Refer to C01759 CFN Diagnostic Manual for
appropriate jumper settings for two or Four-wire operation of these ports.
CAUTION
• Loop 3 - It is the POS high speed port. It is the only port to which a modular POS terminal
can be connected.