Gasboy 1000 Series Installation - Manual (Page 6)

Page 6 C35294 Rev. 03/07/03
COMMUNICATION WIRING
Requirements
The Series 1000 System has two ports used for
communication from the system to peripheral devices such as
printer terminals and/or modems. These devices should be
located in a controlled office type environment. Each port can
be individually set up for use with a terminal or modem and
for RS-232 or RS-422 communication. In cases where a
Series 1000 internal modem is used, port two is not available
for external communication wiring.
An optional auxiliary port provides communication from a
tank monitor through the Series 1000 system to the peripheral
device attached to port 1 or 2. The auxiliary port may be set
for RS-232 or RS-422 communications.
RS-232 wiring can be used for direct connection to an EIA
RS-232 compatible peripheral device. The distance of the RS-
232 wiring is limited to 100 feet and must be in a metal
conduit separate from any AC wires. The remote end of the
wire can be terminated with either an RS-232D connector or a
GASBOY RS-232 termination box.
RS-422 wiring requires the use of a GASBOY Short Haul
Modem (P/N C05618) and the appropriate interconnect cable.
The distance of the RS-422 wiring is limited to 1500 feet.
Other advantages of RS-422 are its high noise immunity and
the exceptions allowed to normal conduit requirements.
Conduit
RS-232 wires over 15 feet must be installed in a metal conduit
separate from any AC wires. RS-422 wires should be installed
in a metal conduit separate from any AC wires unless shielded
cable as described below is used.
1.
The cable can be run with AC wires in metal conduit.
The shield drain wire must be connected to the system
AC ground.
2.
The cable can be run indoors without the use of metal
conduit. The shield drain wire must be connected to the
system AC ground. This cable must not be run outdoors
without the use of metal conduit. Whenever possible the
conduit should be run underground and not overhead.
Wire
All wire must be stranded.
RS-232
•
22 AWG for use with RS-232D connectors (5 wires per
port).
•
18 AWG or 22 AWG for use with the GASBOY RS-232
termination box (5 wires per port).
•
Distance is limited to 100 feet.
RS-422
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.
Cables
RS-232 Termination Box: This unit can be purchased from
GASBOY (P/N C05769) and provides the installer with an
easy-to- wire terminal block connected to the proper pins on
an RS-232D female connector. The terminal block will accept
18 or 22 AWG wire.
EIA 1:1 Cable: This cable can be purchased from GASBOY
(P/N C04549) or made by the installer. This cable is generally
used when communicating from a printer terminal to an RS-
232 termination box or a modem.
Modem Cable: This cable can be purchased from GASBOY
(P/N C04532) or made by the installer. This cable is generally
used when an external modem is connecting with an RS-232
termination box or short haul modem.
Internal Modem
The Series 1000 System is available with an optional internal
modem. When this modem is installed, port 2 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
the local phone company for proper installation of the phone
line.