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The basic diagram, branch by branch
Power: the motor draws tens of amps, which must flow only through the contactor — never through the pushbutton. Control: the button carries a few amps to the contactor coil; this is the branch you can extend (pendant, radio remote) without penalty. Solenoid valves: each coil has its own command, with protection diodes where the control is electronic. The specific diagram for your unit ships with every Gazzera power pack.
Cable sizing: where not to save
At 12V a single volt dropped along the cable is nearly 10% of the supply: the motor pays in torque, extra current and heat. The rules: power cable as short as possible, cross-section generous versus nameplate current (when in doubt, the next size up), properly crimped lugs, ground straight to the chassis with the same cross-section as the positive. The recommended size/length table ships with the unit. [•]
The mistakes we see most often
Ground taken on painted sheet metal (a contact that degrades over time); fuse missing or placed far from the battery (the unprotected stretch stays unprotected); pushbutton wired into the power branch (contacts burned within weeks); battery cable extended with lighting-grade wire. Each of these takes minutes to diagnose and next to nothing to prevent at installation time.
Double acting: wiring the solenoid valves
In double-acting setups the motor works on the way up and lowering (or the second movement) is commanded by a solenoid valve: the control must ensure coil and motor never receive conflicting orders. On Gazzera pendants the logic comes pre-wired; if you build your own control, ask us for your configuration’s diagram before connecting.