AC TRACTION – INSTALLATION PG DRIVES TECHNOLOGY
4 Mounting
Careful consideration should be given to the location chosen to mount the controller. Although the Sigmadrive benefits from
excellent environmental protection, it is good engineering practice for the selected position to be clean and dry, to minimize
shock, vibration, temperature changes and exposure to water & contaminants.
If vertical orientation mounting is not possible, then a cover should be used to shield the controller. Cables must be routed to
prevent liquids flowing into the connections. The mounting position should also allow access to all connections and allow the
connection and removal of a programming device.
Secure the controller to the vehicle via the four clearance holes provided. Ideally, a flat clean metal surface will provide
maximum heat dissipation and ensure full rated power output. Failure to use all four mounting points may result in a loss in
performance. Any airflow around the controller will further enhance the thermal performance. If desired, the controller’s thermal
performance may be further improved by applying a silicone-free thermal compound between the baseplate and the machine
chassis.
The Small Frame controller has M6 (1/4") clearance holes.
The Medium and Large Frame controllers have M8 (5/16") clearance holes.
Under strenuous driving conditions, it is possible for metal sections of the controller’s case to
exceed 41°C (106 °F). Under such conditions, the machine manufacturer should ensure that either
the user cannot touch these surfaces, or that the user is warned not to touch these surfaces.
While 41°C (106 °F) is very close to normal body temperature, prolonged contact with surfaces
above 41°C (106 °F) can result in burns to the skin. PGDT accepts no liability for losses of any
kind arising from failure to comply with this condition.
4.1 Cable Routing
The cables to the controller must be routed and secured in such a way as to prevent damage, for example by chafing or
crushing, or exposure to solvents or other chemicals that may degrade the insulation. It is suggested that the cables are
mounted so that they loop up to the controller, therefore minimizing the flow of moisture into the connectors. Route wiring to
keep lengths as short as possible, especially the high current motor and battery cabling.
SK79646-01 14
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