7.8 Power Supply Unit
1. The power supply unit (PSU) provides power to the machine. It is mounted on
the PSU chassis on the left hand side of the machine and can be accessed by
removing the lower front panel.
2. The PSU converts 115v AC to 24v DC to run the valves, whipper motors,
ingredient motors, brewers, etc. fitted to the machine. The solid state relay,
mounted on the PSU chassis, uses a 24v DC switching circuit to provide 115v AC
for the heater element.
3. The Input/Output (I/O) board, mounted on the PSU chassis, utilizes signals from
the main controller in order to operate valves, whipper motors, the dispense head
motor, ingredient motors, brewer motors, etc.
4. The PSU houses three fuses. These are as follows.
● Heater, 12 amp T (ceramic)
● 115v Auxiliary, 4 amp (glass)
● 115v PSU, 4 amp (glass)
Note: An illustration showing the parts breakdown for the PSU is included in
Section 12 - page 117.
7.9 16 Amp Filter
A 16 Amp filter, mounted on the rear panel, prevents voltage spikes reaching the
power supply, I/O board, controller boards and other sensitive components within the
machine. It also prevents voltages generated within the machine from being emitted
into the 115v supply.
7.10 Coin Mechanism Transformer
The coin mechanism transformer converts 115v AC to 24v AC for Executive protocol
type coin mechanisms. The 24v AC supply is protected by an in-line 4 amp, glass fuse,
which is located in the door assembly above the coin mechanism.
7.11 Coin and Card/Key Systems
The Genesis may be equipped with coin or card/key validation systems using either
protocol ‘A’ or alternatively an MDB system. The coin or card/key system informs the
vending machine controller of the amount of credit which has been deposited into the
vending machine.
67
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