Functional Description; Safety Devices; Micro Switch (Option) - KEB COMBISTOP 38 Instruction Manual

Product Description
2.2

Functional Description

The COMBISTOP type 38 brake is an electromagnetically actuated dual-surface
spring-applied brake for dry running.
The braking force is generated in de-energised state by pressure springs which press
the armature and the lining against the friction surfaces. The lining is twist-proof but
can be axially moved while connected to the shaft.
After applying the nominal DC voltage, the coil inside the magnet creates a magnetic
field which attracts the armature against the spring force. In this way, the linings are
released and the shaft can rotate freely.
After disconnecting the voltage, the armature is de-energised. The pressure springs
press the armature against the linings which generate the braking torque on the friction
surfaces. This allows for decelerating downstream elements.
Using the optional hand release, the brake can be manually opened even in the event
of a malfunction (see section "5.1 Actuating the Hand Release").
2.3

Safety Devices

2.3.1

Micro Switch (Option)

A micro switch can be used to monitor the switching state of the armature (brake
open/closed). The user is responsible to connect the electrical equipment and to
evaluate the signals! The drive control must not allow the motor to start until the
armature was attracted by the magnet, i. e., the lining can rotate freely.
For more information on how to install and set the micro switch, refer to section "4.1.4
Micro Switch (Option)".
01.09.2011 Rev. 01 COMBISTOP Type 38 Page 9