Exlar GSM20, Инструкция по установке и обслуживанию

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Curtiss-Wright | GSM Series Rev. U PN29959 3/28/17 10
Configuration of Logic of Standard Switch Option Selections
Option SW1 SW2 SW3
L1 Not Supplied Normally Open Not Supplied
L2 Normally Closed Not Supplied Normally Closed
L3 Normally Closed Normally Open Normally Closed
Switch Type
Exlar Part
Number Turck Part Number
Normally Closed Switch 43404 BIM-UNT-RP6X
Normally Open Switch 43403 BIM-UNT-AP6X
2.7 Internal Holding Brake
Many applications require the addition of the rear internal holding
brake. The brake is held open by the supply of power to a
magnetic/mechanical clutch. Whenever there is not power to the brake,
the armature is held in place to prevent the inverted roller screw from
turning and prevent the output rod from back driving, which therefore
prevents the output rod from moving.
The holding brake is permanent magnet engaged and electrically
released. The mechanical advantage of the roller screw allows the
holding brake to prevent back driving of the load. The holding capacity of
the brake is sufficient to hold the rated force of the actuator when used in
grease lubricated units.
Historically, Exlar actuators and motors with holding brakes provided a
transient suppression diode wired internally to the actuator or motor.
With the changes in servo amplifier and control technology, there are
now instances where the diode is not required to be within the motor. An
example of this is a control system using a dedicated brake control relay
containing transient suppression components.
Because of this change in technology, Exlar now provides the
transient suppression diode separately from the actuator, for inclusion in
the brake control circuitry as needed by the end user. A schematic is
provided below showing the typical use of the transient suppression
diode.