Gasboy CFN Series Site Controller III Start-up - Manual (Page 39)

MDE-4793A CFN Series Site Controller III Start-up Manual for CFN III Versions 3.5 and above · November 2008 Page 33
SC Physical System Layout
5 – Physical System Layout
When verifying physical system layout, ensure that power to the system has not been applied
and all power is off. All wiring and conduit runs must also conform with the National
Electrical Code (NFPA 70), the Automotive and Marine Service Stations Code (NFPA 30A),
and State and Local Electrical Codes. Refer to MDE-4298 SC III Installation Manual for more
information.
SC
1 Open up the PC. Perform a visual inspection to verify if all boards are seated properly, all
connections are tight, and there are no loose or unsecured components.
2 Verify if the SC is located in an office-type environment and correctly installed according to
the SC III Installation Manual.
3 Verify if all data communication cables located on the back of the SC III/PC are correctly
installed according to the SC III Installation Manual. The SC III has four RS-232 ports (1, 4, 5,
or 6). All direct connect RS-232 cables over 15 feet must be installed in metal conduit separate
from any AC wires.
If a 2-wire device, such as DPT, is connected to a loop that is set for 4-wire
communication, the SC will not operate correctly. 4-wire devices on a 2-wire loop
may not communicate with the SC.
CAUTION
Port 3 is used for communication to Tokheim pumps only; one of the RS-232 ports can be
used for communication through a modem or to a computer. The others are additional and can
be programmed according to the application. COM1 and COM2 can be programmed
according to the application; LPT1 is a parallel port which is commonly connected to a printer.
RS-485 communication cables (C05670, 8-foot modular cable similar to a telephone cord)
must be installed as follows:
LOOP 1 or 2 modular cable must be directly connected to either modular jack of the black
RS-485 junction box. Do not connect Loop 1 or 2 to the same RS-485 junction box. Loop 2 is
factory-set for 2-wire for communication to Tokheim DPTs.
Note: If using Tokheim DPTs, consult C09146 Pump Interface Manual.
LOOP 3 modular cable must be directly connected to the modular jack on the rear of the
Check Point console labeled SC or to the converter if connecting to a Profit Point. Refer to the
SC III Installation Manual and the Profit Point Installation Manual for remote console wiring
considerations. If the SC III will be used as a SC III/POS WS, Loop 3 is used to connect to
other POS terminals (Profit Point, CheckPoint) at the site.