Gasboy CFN Series SCII Installation Manual - Manual (Page 26)

System Layout
05/28/03 2-19
CRT/PRINTER
Description
The CRT terminal is used for communication to and from the site controller. A CRT/printer
combination can be used as a logger for providing hard-copy printouts of action at the site or as an
interrogation device to extract information from the system via the system’s commands. A CRT
can be directly connected to the site controller, connected via short haul modems, or connected
via telephone modems.
Location
The CRT/printer should be located in a clean, office-type environment. Do not install over a
hazardous location. CRT/printer combinations supplied by GASBOY have an operating
temperature range of 32
o F to 104 o F, 10% to 95% relative humidity, non-condensing. Locating the
data terminal in a dirty environment may cause premature failures.
MODEM
Description
Modems are used for communication to the site controller where distance or conditions will not
permit direct connection to the unit. There are various types of modems that can be used
according to the maximum baud rate required and the connection method desired. Modems to be
used for dial-out to a bank network require a dedicated phone line.
Location
It is recommended the modem be located in an office-type environment. However, if this is not
possible, it should be housed in a protective enclosure. Do not install over a hazardous location.
Modems supplied by GASBOY have an operating temperature range of 32
o F to 104 o F.
POWER CONDITIONER
Description
A Listed power conditioner should be used when there is an unstable source of power. When
used, the power conditioner helps provide clean power to the site controller and other CFN
devices located near the site controller. Poor power conditions are a key cause to system
malfunction or failure. The power conditioner provides transient and common mode protection for
the CFN system, although it cannot totally compensate for extremely poor power conditions.
Location
The power conditioner should be located near (within 50 feet of) the site controller, but not in or
above a hazardous location. It must be located in an area protected from direct contact with
weather (typically near the system circuit breakers). The unit is designed for an operating
temperature range of 0
o F to 104 o F.
VOLTAGE REGULATOR/BACKUP POWER SUPPLY (UPS)
The voltage regulator/backup power supply protects line-operated equipment from low line voltage
(brownout) and total line power failure by providing virtually instant emergency power. The
voltage regulator/backup power supply also protects line-operated equipment from potentially
dangerous voltage spikes coming in on the commercial AC power. Although it does help to
condition the power to the CFN system, it cannot totally compensate for extremely poor power
conditions.
Location
The voltage regulator/backup power supply must be located in an area protected from direct
contact with weather (typically near the system circuit breakers) and should be no further than 50
feet from the CFN system for optimum protection. The unit is designed for an operating
temperature range of 0
o C to 50 o C.