NORD B1901 User Manual

Version 04.06

Operating and assembly instructions spring-loaded brake FDW – ATEX

Operating and assembly instructions

Spring-loaded brake FDW

Type of protection IP 65 - dust-protected design

Zone 22, category 3D, T 125°C (non-conducting dust)

Please carefully read and pay attention to these operating and assembly instructions.

Important information

Safety information and warnings:

Impending danger because of current!

Dangerous situation!

Important information on explosion protection!

Safety information and instructions:

Paying attention to and observing theses operating instructions is a prerequisite for a trouble­free operation and the compliance with possible warranty claims.
For this reason, first study the operating instructions before connecting the brake.

In order to protect persons and property, strictly meet all the safety information and instructions
included in these operating instructions.

When being ignited through hot or sparking objects, explosive dust concentrations can cause
explosions which might result in serious or fatal injuries of persons as well as severe damage to
property.

It is an absolute prerequisite that the persons who are responsible for using brakes in
potentially explosive atmospheres have been trained in the correct use of those brakes.

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Operating and assembly instructions spring-loaded brake FDW – ATEX

General information and instructions:

The dust-protected spring-loaded brakes are suited for the use in zone 22 (non­conducting dust) and conform with the building regulations of device group װ, category 3D as
per DIN 50 014 and DIN 50 281-1-1.

Dust deposits must not exceed 5 mm.
Ambient temperature -20 °C to +40 °C

Under the prescribed and established operating conditions the surface temperature of the
spring-loaded brake will not exceed 125 °C – refer to technical data on page 4.

In order to warrant the max. admissible surface temperature, the spring-loaded brakes are
equipped with a PTC thermistor detector (100 °C) (resistance < 100 Ohm at 20°C).
In case of a malfunction, motor and brake have to be isolated from the power system through a
commercial tripping unit.

The operator is responsible for controlling and testing the protective equipment

as to its efficiency.
Prior to commissioning, an evidence of the efficiency of the protective
equipment is required.

The designation is as follows:

CE Ex ll 3D T 125 °C for zone 22 (non-conducting dust)

The brake must not be opened for inspection in an explosive atmosphere.
Prior to opening, always switch off the voltage and secure it against an accidental reclosure.
Spring-loaded brakes are suited to be connected with three-phase a.c. motors.

In case of voltage-operated three-phase a.c. motors, the operator has to warrant and care for a
ventilation of the brake.
External measures and actions have to safeguard that the braking command is simultaneously
given with switching off the motor.

The spring-loaded brake is a component of a device and/or of a machine and earthing
arrangements have to be made there.

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