10
Power Requirements
CONNECTION INSTRUCTIONS FOR THE SYSTEM POWER SUPPLY,
DISPENSER, MOTOR, AND ELECTRICAL GROUND CIRCUITS
A.C. POWER REQUIREMENTS
1. Breaker Panel: A 125 Amp breaker is the minimal allowable electrical service for the pump motor and
interface boxes, dispensers, canopy lights and advertising signs.
2. IC boxes: Both the dispenser IC box and the DPT credit card module IC box require a 115VAC, 15 Amp
DEDICATED breaker (with no other devices or outlets connected to it) for connection to the EZ TM85 board, and
to the MPC-TM85 board. Make sure the correct voltage and frequency are present. All AC wires must be 14
gauge (min.), and in conduit. Do not put wiring from other sources in this conduit.
3. PETROSMART EZ Console: a standard plug-in AC Adaptor power module powers the console. The Adaptor
can be inserted into a standard electrical outlet that supplies, 115VAC, 60Hz, and 15W power. The Adaptor
converts the input to 15 VDC, 600mA that it supplies to the EZ console. A UPS is supplied with then system to
minimize disruption in the event of a general power failure.
4. Dispensers: The dispensers' installation guide shows all requirements including, but not limited to breakers,
wires to supply data signals to the electronics, green wire for Earth Ground, and wires to power the dispenser and
fluorescent lighting. Refer to the installation manual for the dispenser being installed for complete installation
requirements.
Pump Motor: Use auxiliary relays, correct gauge wires, and 115/230VAC breakers to supply power to the pump
motors. Refer to the installation manual of the equipment being used for complete installation requirements,
drawings, and special notes for proper installation.
Pump Requirements
The Bennett 3K dispensers must have firmware equal to or better than 210 – 044.
It must be set to 485 communication, and each fueling point must be addressed in the pump’s CPU.
It DOES NOT need a pulser interface option to communicate with the console. The firmware at or above 210
allows the pump and console to “talk” back and forth about current pricing, preset / prepay sale amounts, handle
and sale status.
You may wish to connect only one set of data wires at a time to the EZ system. All of the dispensers will talk
basically over the same two wires. Polarity or other wiring issues at one pump may cause a system wide
communication failure.
Also, if two fueling points are set to the same address position, say # 2, the console will show communication with
fueling point 2, but will not be able to control the pump properly. Prices may be sent to one dispenser, but the
handle switch or grade select button may have no effect at the console as we will be receiving mixed messages.
One pump will reply that its handle switch is lifted while the other with the same fueling point # will reply that its
handle switch is hung up etc.
