Gasboy CFN Islander I User Manual download pdf (Page 11)

Page 11

OPTIONAL MODEM REQUIREMENTS

GASBOY RS-422 Short Haul Modems

A GASBOY Short Haul Modem (SHM) and the appropriate

interconnect cable must be used when the RS-422

communication mode is being used to communicate to the local

or remote ports of the Islander. The SHM should be used for

distances between 100 and 1500 feet. One SHM is required at

the remote end of the communication wiring. SHM's must be

connected with private lines and will not work if connected into

a telephone network.

AC power should come from the same breaker that supplies the

peripheral device or the system.

Twisted pair shielded cable is highly recommended for RS-422

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 recommended C09655 or its equivalent, RS-422

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-422 field

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

wires.

The cable can be run indoors without using metal conduit. The

shield drain wire must be connected to the system ground.

External Modems

The type of phone line required for communication via an

external modem is contingent upon the type of modem used and

the method of communication desired. Consult the manual that

comes with the modem for specific requirements.

Internal Modem

The Islander is available with an optional internal modem.

When this modem is installed, remote port communication is

routed through the modem in place of being wired at the

terminal block in the post. The phone line for the internal

modem must not be installed in the DC conduit. Check with

your local phone company for proper installation of the phone

line.

The 2400 baud modem is designed for 300, 1200, or 2400 baud,

full duplex, asynchronous communication. The 33600 baud

modem is designed for 1200, 2400, or 9600 baud, full duplex,

asynchronous communications. The modem is mounted inside

the Islander at the factory. Power for the modem is supplied by

the Islander.

The modem is designed to meet or exceed the direct connection

registration requirements of the FCC rules. This means the

modem will connect directly with a jack supplied by the phone

company. The customer is required to order this jack and have

it installed. To order this equipment from the phone company,

specify:

1. Any one of the following jacks: RJ11C or RJ41S, OR

RJ45S.

2. The registration number of 6BHUSA-24793-DT-E.

3. The data transmission rate of 300 baud, 1200 baud, 2400

baud, or 9600 baud.

4. The Bell equivalent of 103J/212A.

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Gasboy CFN Islander I User Manual Page 11

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