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Base controller, Fault contactor – Rockwell Automation 150-E SMC Elevator Users Manual User Manual

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Rockwell Automation Publication 150-UM009D-EN-P - February 2011

Chapter 1 Introduction

Base Controller

The base controller is a standard product that uses a number of intelligent
features to provide advanced motor control and simple diagnostics. The base
controller consists of the elements necessary to control the motor. These elements
include:

a main micro-processor
current sensing
built-in adjustable overload
solid-state power modules, and
electro-mechanical bypass contacts.

Through the use of simple DIP switch configuration, the product can be
configured for a variety of modes. The default configuration uses the built-in
current sensing to limit current to the motor during starting. Once up to speed,
the base controller transitions to the run mode by transitioning to internal bypass
contactors and changing the state of the auxillary contact. The internal bypass
contactor provides decreased heating during run and removes the SCRs from the
circuit.

Fault Contactor

The fault contactor is controlled through the fault contact of the controller.
When control power is applied to the controller, the normally open fault contact
closes and applies control power to the coil of the contactor. The fault contact
will open, removing power from the fault contactor, and thus disabling the motor
during any one of the following events:

The power is removed from the controller.
The motor has developed a problem including overloading due to one of

the following:
Mechanical or electrical reasons
Ground faults or
Motor short circuits.

The starter has detected an internal problem such as a shorted SCR or

overtemperature condition.