Gasboy 1000 Series Technical Reference Manual - Manual (Page 145)

Communications
03/07/03 6-7
DIRECT WIRING FOR DISTANCES UP TO 1500 FEET
Short Haul
Modems
For distances from 100 to 1500 feet, the Series 1000 can be wired for direct
communication using an asynchronous short haul modem (GASBOY P/N
C05618). Communication can be through Port 1 or Port 2 of the Series 1000
System. The short haul modem and the appropriate interconnect cable must be
used for RS-422 communications. It can be used for distances under 100 feet in
place of RS-232 wiring. One SHM is required at the remote end of the
communication wiring. These modems must be connected with private lines and
will not work if connected into a telephone network.See the wiring diagram below
for details.
Figure 6-4. GASBOY Short Haul Modems (P/N C02479) (Distances up to 1500 feet)
AC Power The AC power for the short haul modem should come from the same breaker that
supplies the peripheral device or the system.
Cabling 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.
Cable with a voltage rating of less than 600V must be installed in a conduit
separate from all AC wires.