Gasboy CFN Islander I User Manual download pdf (Page 9)

Page 9

WIRE SIZE

Wire Size

This table shows the required AC wire size for suction and

submersible pumps based on the HP rating of the pump motor

and the distance from the circuit breaker to the pump/dispenser

for both 120 and 240 volt units. Use this table as a guide for

selecting the proper size wire according to the specific

installation requirements for motor wiring. All wire should be

stranded.

COMMUNICATION WIRING

Requirements

The CFN system utilizes RS-485, RS-422 and RS-232 modes

for communications to other CFN system components and

peripheral equipment. The Islander has four ports: two RS-485,

which are dedicated to communicating with other CFN

components; the other two are configurable for either RS-232 or

RS-422, for use with a terminal, modem, or PC. Phone line

(modem) communication may also be used when remote

communication to the site is desired. In cases where an Islander

internal modem is used, the remote port is not available for

external communication wiring.

RS-485 Data Loop

RS-485 is used for communications between the Islander and its

peripherals. Communication takes place over RS-485 modular

cables provided with the system components and the RS-485

data loop field wiring.

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.

When using the above recommended cable or its equivalent,

RS-485 wires 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.

If using cable other than that recommended, the RS-485 field

wires must be installed in a metal conduit separate from any AC

wires.

Wiring over 100 feet must be C09655 or equivalent. Distance

from Islander to farthest CFN component is limited to 1000 feet.

Total length of all RS-485 wiring cannot exceed 1500 feet.

RS-485 modular cables required are supplied with the system.

These cables are not compatible with standard phone cables.

GASBOY supplied cables are 8 feet long, however, if you need

to connect to a device with a modular connector, you must use

an RS-485 junction box to connect the device to the RS-485

wiring. The system components wiring diagrams on pages 6

and 7 show proper connection of the CFN components.

RS-232

RS-232 wiring is used for communication between the Islander

and EIA RS-232-compatible peripheral devices (terminal,

modem, printer, etc). Distance for RS-232 are as follows:

1-100 feet: RS-232 can be directly connected to a peripheral

device.

101-1500 feet: RS-422 and GASBOY Short Haul Modem

required.

RS-232 wiring exceeding 15 feet must be installed in metal

conduit separate from any AC wires.

Cables may be purchased from Gasboy or made by the installer.

See the Installation Manual for cabling details.

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Gasboy CFN Islander I User Manual Page 9

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