Products
ELECTROMAGNETIC SPRING-APPLIED FAILSAFE SAFETY BRAKES.

7. ACCESSORIES



a. Hand release
The hand release serves to release the brake manually. It can also be retrofitted. The hand release goes back to its base position automatically after operation. The gap is the distance between the armature plate and the washer this gap dimension must be maintained when assembling the hand release.
Caution :-
Even with a reduced rated torque, a readjustment of the working air gap reaching the dimension is necessary for reasons of safety.

b. Flange
If no suitable friction is available, the mounting flange can be used, which at the same time is able to carry the dust cover seal.

c. Dust cover-seal
The dust cover-seal prevents to a large extent exist or penetration of dust, dirt, humidity, etc. into the braking area. The seal is pulled over the brake and inserted into the output side; we recommend using a mounting flange .

d. Friction plate
If plain machined counter face is available but cannot be used as a friction surface, for example in the case of aluminum, we recommend to use a friction plate which can also be combined with a seal. The friction plate is made of non-corroding material. It can be supplied up to size 100.

e. Centering flange (Tachometer brake)
The basic module N combined with a centering flange is suitable for the assembly of a tachogenerator. Such a kind of brake arrangement is shown in the figure below :

f. Mounting flange (double brake)
The mounting flange can be used to adapt a second basis module E to the basic module N; the resulting double brake is suitable for stage machinery or other applications with increased safety requirements. It basically has two independently acting brakes arranged in tandem, silenced, switched noise below 60 dB. Such a kind of double brake arrangement is shown in he figure below :

g. Brake Cover
A brake can be mounted to the basic module E and N to protect the break from water and dust. The property of the cover material is such that it protects the brake from explosion and safe guards it from disastrous environmental conditions. Hence these brakes are designed with the IP 67 and 68 protections for their enclosure. Such a kind of encapsulated brake is shown in the figure.



h. Micro Switch
The micro switch is used when a monitoring of the air gap is required. The motor can only start, if the brake is released. If the maximum air gap is reached, the stator attracts the armature plate. In that case the motor contactor is not activated and the motor does not start. The air gap of the basic module E and the basic module N can be readjusted. The micro switch can also be adjusted such that a signal is output before the wear reserve is reached (wear monitoring). Hence the micro-switch protects the brake from mechanical damage. On most occasions, they are interlocked with the circuit of the electric motor and prevent the motor from starting before the brake is release. Otherwise the motor could drive through the brake resulting in increased wear and in the worst case, even the destruction of the brake.

NOTE :

Micro switch are available in the market for various sizes.
Customers can contact the dealers or the manufactures for the required size.
We shall give the suggestions for the availability & the required size of micro switch.
E.g., of the arrangement of the micro switch is shown in the figure.

These brakes are also made available in low cost and stripped down versions, an example of which is shown below.

The most typical of such versions are the brakes designed for holding load.

HOLDING BRAKE

As you will see the above brake version does away with the torque adjustment setting as well as the other add-on components, which might be needed for a particular application.

Moreover these brakes function as holding brakes with the added holding forces provided by another set of springs on the internal periphery of the brake magnet. These brakes find a wide usage in the modern servomotors for safety function.