Gasboy CFN Series SCII Installation Manual - Manual (Page 36)

System Components Wiring
05/28/03 3-3
1. All wiring is to be installed and used in accordance with all building/fire codes, all Federal,
State, and Local codes, National Electrical Code (NFPA 70), NFPA 30, and Automotive and
Marine Service Station Code (NFPA 30A) codes and regulations. Canadian users must also
comply with the Canadian Electrical Code.
2.
Cable: Twisted pair shielded cable is highly recommended for RS-485 wiring. Although it is
recommended that wires be run in a conduit separate from AC wires, they can be combined
in the same conduit with AC wires providing UL-Listed cable with the following specifications
is used:
Conductor: 18 AWG stranded wire. 2 twisted-pairs.
Shield: Foil-wrapped 100% coverage and/or tinned copper braid 90% coverage
Drain Wire: Stranded, tinned copper, 20 AWG or larger/or braided shield
Voltage Rating: Maximum operating voltage of 600V
Environmental: Gas- and oil-resistant; suitable for wet or dry locations.
GASBOY can supply Belden 1063A (P/N C09655) which is a UL-Listed, 4-conductor cable
that meets the requirements listed above. NOTE: Belden 1063A is UL-Listed but not CSA
listed.
Cable with a voltage rating of less than 600V must be installed in a conduit separate from all
AC wires.
3.
Conduit: When using the recommended shielded, twisted-pair cable described above, the
cable can be run with AC wires in metal conduit. The shield drain wire must be connected to
the system AC ground. Only AC wires for the system and pumps can be installed in the AC
conduit. Do not run the cable outdoors without the use of metal conduit. Do not run this
cable overhead, outdoors.
The cable can be run indoors without the use of metal conduit. The shield drain wire must be
connected to the system AC ground.
If using cable other than that recommended above, the RS-485 field wires must be installed
in a metal conduit separate from any AC wires.
4.
Distance: The following distances must be adhered to when installing the RS-485 field
wiring.
● Wiring over 100 feet must meet the specifications outlined in Cable above.
● The distance from the RS-485 junction box to the farthest CFN component is limited to
1000 feet.
● The total length of the RS-485 field wiring to all the CFN components cannot exceed
1500 feet.
5.
RS-485 Modular Cable: The RS-485 modular cables required are supplied with the system.
These cables are not compatible with standard phone cables that can be obtained from other
sources.
GASBOY-supplied cables are eight feet long. If you need to connect a CFN component with
a modular connector (i.e., console) more than 8 feet from the system, you must use an RS-
485 junction box to connect the device to the RS-485 communication wiring.
6.
Connections: See the System Components Wiring Diagram later in this section for proper
connection of the RS-485 field wiring to the CFN system components.