Technical data

Digital Brushless AC servo drive system - Ref.0707 MCSi-39/84

Integrated safety

The Safe Disable function (SD) offered by Fagor MCS Innova drives permits

disabling the power output of the drive making sure that the motor torque is

eliminated as a safe situation.

This function is available through the "Drive Enable" section so called in

standard Fagor servo drive systems. Techniques and elements approved to

be used in safety systems have been considered for its design and internal

operation.

Thus, with a conventional drive (without SD), a contactor would have to be

installed to assure a safe disable of the motor. However, using the safety

techniques (implemented in Fagor MCS Innova drives) guarantees the same

or greater safety without having to use external contactors, thus saving

material and room in the electrical cabinet.

The "Drive Enable" pin already available on conventional Fagor drives works

the same way on drives with Safe Disable although it has been implemented

keeping the safety principles and protocols in mind.

For that, a safety relay with guided contacts has been considered so:

 The first contact (NA) enables the power inverter and sets the control part

to rest assuring a redundancy when locking up.

 The second contact (NC) is used as an external acknowledgement of the

status of the safety relay. This contact is available between pins 41 and 42

of connector X3 located on the face of the module.

BUS DC

Drive Enable

CONTROL

Set point