Gasboy Site Controller III Start-Up - Manual (Page 41)

MDE-4375 CFN Series Site Controller III Start-Up Manual · June 2005 Page 29
Physical System Layout
4 – Physical System Layout
When verifying physical system layout, be sure 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. See C35880 Site Controller III Installation Manual for more
guidance.
Site Controller
1 Open up the PC. Perform a visual isnpection to verify that all boards are seated properly, all
connections are tight, and there are no loose or unsecured components.
2 Verify that the Site Controller is located in an office-type environment and correctly installed
according to the Site Controller III Installation Manual.
3 Verify that all data communication cables located on the back of the SC III/PC are correctly
installed according to the Site Controller III Installation Manual. The Site Controller 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.
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 Site Controller or to the converter if connecting to a Profit Point.
See the Site Controller 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.
If a 2-wire device, such as DPT, is connected to a loop that is set for 4-wire
communication, the site controller will not operate correctly. 4-wire devices on a 2-wire
loop may not communicate with the site controller.
CAUTION