Installation manual

FuelMaster
®
Installation Manual
31
Digital Cell Modem:
a digital cell modem may be installed in an FMU to facilitate
communications to the FMU through a digital cell phone. Syn-Tech builds a kit designed to accept
cell modems from several different vendors. The cell modem is not supplied with the kit.
Direct Connect Cable: some customers may choose
to use a laptop for a Central Controller. Technicians may
use a laptop to direct connect with an FMU via
Hyperterminal or Procomm to set options or change FMU
configuration values. Both these options are possible with an
RS-232 direct connect cable. See Appendix D for
instructions in the use and manufacture or purchase of a
laptop direct connect cable.
Direct Connect Through a Two-Way Ringdown
Device: Central Controller communications to the FMU
from a desktop PC may be direct-connected. A
communications cable is routed in conduit from the Central
Controller modem through a Two-Way Ringdown Device
(Figure 2-4) to the FMU. This precludes the need for
separate phone lines for both the FMU and Central Controller. The Two-Way Ringdown Device
converts inputs from a modem into a ring signal recognizable by the FMU. Direct-connections may
be made to multiple onsite FMUs. If more than one FMU is direct connected to the Central
Controller, an automatic call processor will be necessary to change connections between FMUs. A
system may combine onsite direct-connect FMUs, and offsite modem connect
FMUs. A phone line simulator cannot be used in conjunction with a credit card
system. Credit card systems require an active analog phone line for credit
card authorization.
Direct connections do not permit Syn-Tech’s Help Desk to modem connect
and troubleshoot the FMU. To acquire this option, the cable routed from the
two-way ring down device to the FMU must be disconnected from the two-
way ring down device and plugged into the wall jack of an analog telephone
line such as used for a fax machine. When asking for Help Desk support,
make this connection and provide the Help Desk the telephone number for
the line at the wall jack.
Electronic Dispenser Interface: some electronic fuel dispensers may
only be controlled through a two-wire RS-232 connection to the dispenser
CPU. Proprietary commands are sent through this communications connection
to initiate CPU actions. For these dispensers, an Electronic Dispenser
Interface must be installed between the FMU and dispenser distribution box.
See Appendix H for details on the use of the Electronic Dispenser Interface.
Equipment Interface Unit (EIU): an EIU (Figure 2-5) is a low-cost
Satellite FMU installed to control activation of ancillary fuel site equipment
(i.e., gate opener, door opener, car wash, vacuum cleaner, etc.) with a
Prokee
®
and/or keypad inputs. The EIU cannot replace a Satellite FMU for
dispenser hose control.
Figure 2-4.
Two-Way Ringdown Device
Figure 2-5.
Equipment
Interface Unit
(EIU)
207