3 Installation and wiring
3.1 General description
The AC-M1 is composed by a control section and a power section, both enclosed in a
plastic cover with an aluminium baseplate or a heat sink on the bottom of the enclosure.
There is a power module which can be connected to a three-phase AC motor through the
power outputs labelled as U, V, W. There can be an optional output (labelled as P) for a
DC pump motor.
Two 23 ways ampseal connectors ( named K1and K2), permits to interface control board
to lift truck electrical/electronic sub-devices. See tables on pages 14 and followings for the
complete pin-out of this connector.
There are two connectors +B and -B which supply the power module.
Please see figure 1 on page 9 for AC-M1 drawing.
SME recommends you to protect the AC-M1 against reversed battery
polarity.
3.2 Mounting the controller
AC-M1 can be oriented in any direction and meets IP65 environmental protection rating.
However, the location should be carefully chosen to keep the controller clean and dry.
If a clean, dry mounting location cannot be found, a cover should be used to shield the
controller from water and contaminants.
The outline and mounting hole dimensions for the AC-M1 controller are shown in figures
Errore: sorgente del riferimento non trovata and 1 on page 9.
To ensure full rated power, the controller should be fastened to a clean, flat metal surface
with four 6.5 mm diameter bolts, using the holes provided.
A thermal joint compound must be used to improve heat conduction from the controller
heatsink to the mounting surface.
During the design and development of your end product, you will need to ensure that its
EMC performance complies with applicable regulations.
The AC-M1 controller contains ESD-sensitive components. Use
appropriate precautions in connecting, disconnecting, and handling the
controller.
For EMC and ESD purposes, SME strongly recommends that both the
AC-M1 heat sink and the houses of the motors are connected to the
chassis of the truck.
PRELIMINARY VERSION 11
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