Installation manual

FuelMaster
®
Installation Manual
69
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Wire/Cable Recommendations. Where wire/cable sizes are listed, larger conductors may be used
to gain additional range:
1. AC Power to FMU(s). Three conductors; 12 AWG THHN (increase to 10 AWG if length exceeds 400
feet) stranded; black for hot, white for neutral, green for ground; should be derived from separate 15
amp circuit breaker. Minimum power requirements may not be met at all times if derived from
another source (dispenser). If an uninterruptible power supply (UPS) is installed, install UPS inline
between circuit breaker and FMU.
2. Communications Line to Master FMU. Fiber optic network cable is the only communications line
which may be run in the same conduit as AC power. Mixed low voltage DC cables may be routed
through the same conduit when permitted by the manufacturer of the connected device. All other
communications mediums must be routed through separate conduit.
a. Telephone/Two-Way Ringdown Device. Two conductors; 20-24 AWG CMX shielded
communications cable. Manufacturer of Two-Way Ringdown Device claims range of 2.6 miles
with 24 AWG twisted pair. Wireless communications are possible with phone line extenders and
cell modems.
b. Network cable. Cat 5e/6 CMX; use shielded cable if other low voltage conductors are routed
through the same conduit. Maximum recommended length is 250 feet. If the distance exceeds
100 meters (330 feet), it is recommended fiber optic cable be used. Wireless network
communications are possible.
c. Network fiber optic. Fiber optic cable may be pulled to the FMU and converted to cable with a
transceiver. It is recommended spare fiber optic strands be pulled for backup purposes should
the originals become damaged.
3. Printer Cable to Master FMU (On-Site or Transaction Printer). Three conductor; 22 AWG CMX
shielded RS-232 communications cable. Maximum length with RS-232 is 300 feet. Distance may be
extended by using two twisted pair 22 AWG CMX RS-422 communications cable and short haul
modems as illustrated in Product Bulletin 126. Wireless communications are possible through an RS-
232 radio modem as illustrated in Product Bulletin 133.
4. Dispenser Hose Control. 14 AWG THHN. If controlling a valve, motor, or contact starter pull two
wires for each hose to be controlled. If accessing dispenser reset, pull one hot wire from the breaker
panel (which may be jumped to multiple hose positions), one wire for each hose to power dispenser
reset and, if pump handle sensing is desired, pull a hot wire from pump handle reset (see Section 3
for hose control options). Some unique control options are described in Product Bulletins 122 for the
Gasboy 9800, 141 for the Bennett 3K, 142 for the Wayne Select, 152 for the Liquid Controls LCR
and LCR II, and 159 for the Veeder-Root EMR
3
.
5. Dispenser Pulse. 22 AWG; shielded and insulated to maximum voltage in conduit if run with AC
power or control. The number of conductors will be dependent upon the requirements of the pulser
used. Some unique pulse pickups are addressed in the product bulletins referenced in step 4, above.
6. Satellite/EIU Communications. Within 300 feet use two twisted pair 22 AWG shielded with a drain.
Over 300 feet use two twisted pair 18 AWG shielded with a drain. This is a communications cable
that cannot be routed in the same conduit with AC power or dispenser control, but can be routed in
the same conduit with other communications cables. Wireless Satellite/EIU communications are
possible with an RS-232 radio modem.
7. Tank Monitor. This is a communications cable that cannot be routed in the same conduit with AC
power or dispenser control, but can be routed in the same conduit with other communications cables.
Use a 3-conductor shielded cable if using RS-232. Use two twisted pair shielded with a drain if using
RS-422.
8. Indoor Receipt Printer. This is a communications cable that cannot be routed in the same conduit
with AC power or dispenser control, but can be routed in the same conduit with other low voltage
communications cables. Maximum length with RS-232 is 300 feet. Distance may be extended by
using two twisted pair 22 AWG CMX RS-422 communications cable and short haul modems as
illustrated in Product Bulletin 126. Wireless communications are possible through an RS-232 radio
modem as illustrated in Product Bulletin 133.
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