Gasboy 1000 Series Technical Reference Manual - Manual (Page 146)

GASBOY Series 1000
6-8 03/07/03
Conduit When using the recommended shielded twisted-pair cable described above, 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. Do not run the cable outdoors without the use
of metal conduit. Do not run this cable overhead, outdoors. The cable can be run
indoors without the use of metal conduit. The shield drain wire must be
connected to the system AC ground. If using cable other than that recommended
above, the RS-422 field wires must be installed in a metal conduit separate from
any AC wires.
INTERNAL PHONE MODEM COMMUNICATION
Internal Modem The Series 1000 is available with an optional internal phone modem (GASBOY
P/N C05739). The modem is mounted inside the Series 1000 System at the
factory (The modem can be added in the field by an authorized service
representative). Power for the modem is supplied by the GASBOY system.
Line Installation When the internal 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. The local phone
company should be consulted for proper installation of the phone line. The
internal modem connects directly with the jack supplied by the phone company.
The customer is required to order the phone jack and have it installed in the
Series 1000 pedestal. See the Series 1000 Installation Manual for the necessary
specifications for ordering the phone jack from the phone company.
COMMUNICATION PROTOCOL
Device
Requirements
Communicating with the GASBOY Series 1000 System requires a device capable
of transmitting and receiving full duplex, ASCII asynchronous data via an EIA-RS-
232 connection. The Series 1000 uses a simple terminal protocol (TTY). There
are no special characters transmitted to designate the beginning or end of the
data blocks.
Data Format Data is transmitted in the following format: one start bit, eight data bits, one stop
bit.
Each character is echoed back to the transmitting device. This checks the
integrity and enables CRT operators to display transmitted data.