Gasboy TopKAT Fuel Management System Installation - Manual (Page 27)

MDE-4319E TopKAT™ Fuel Management System Installation Manual · August 2008 Page 21
Communication Requirements General Installation
The cable can be run indoors without the use of a metal conduit. The shield drain wire
must be connected to the system AC ground (at one end only).
If you are using a cable other than what was recommended previously, the RS-485 field
wires must be installed in a metal conduit away from AC wires.
• Distance: The maximum field wiring cable length must not exceed 1500 feet (455 m).
RS-232
RS-232 wiring can be used for communication between the TopKAT system and EIA RS-232
compatible peripheral devices (CRT/printer, modem, and so on). The remote end of the wiring
can be terminated with either an RS-232D connector or a Gasboy termination box. You must
follow these installation requirements when installing the RS-232 communication lines:
• All peripheral equipment connected to the RS-232 ports must be UL-listed, have an EIA
standard RS-232 communication protocol and not be installed over a hazardous location.
• Distance: The following distances must be adhered to when installing the RS-232
communication lines:
- 1 - 100 feet (1 - 31 meters): RS-232 can be directly connected to a peripheral device.
- 101 - 1500 feet (32 - 455 meters): RS-422 and Gasboy Short Haul Modem (SHM) are
required. Refer to “RS-422 - SHMs” on page 22 for details.
• Conduit: All direct connect RS-232 cables over 15 feet (5 m) must be in a metal conduit
away from any AC wires. For conduit requirements of SHMs, Refer to the installation
sheet that applies to the device being used.
• Cables: RS-232 cables can either be purchased from Gasboy or made by the installer. The
type of cable needed will vary according to the device it connects. When making cables,
the wire used must be stranded and not a solid core.
Figure 4-1: RS-232 1:1 Cable (Part Number C04549: 8 feet M/M)