Personal injury through hazardous move‐
ments caused by falling or descending axes!
DANGER
Secure vertical axes against falling or descending after disconnection:
●
lock the vertical axes mechanically,
●
provide an external braking / collecting / clamping device, or
●
Ensure sufficient weight compensation of the axes.
The serially delivered holding brakes which are driven by the control device
are not suited for personal safety!
Personal protection must be realized by superordinate fail-safe measures,
such as e.g. the locking off of the danger zone by means of a protective
fence or grill.
Beside the specified details and notes about holding brakes, heed
the additional standards and directives when planning the system.
For Europian countries:
●
EN 954 and ISO 13849-1 and ISO 13849-2 Safety-related
components of controls
●
Information sheet no. 005 "Gravity-loaded axes (vertical ax‐
es)" published by: Fachausschuss Maschinenbau, Ferti‐
gungssysteme, Stahlbau
For the USA:
●
See National Electric Code (NEC), National Electrical Manu‐
facturers Association (NEMA) as well as local building regu‐
lations.
The following is generally valid: Comply with all applicable nation‐
al regulations!
The permanent magnetic brake is no safety brake. This means, a torque re‐
duction by non-influenceable disturbance factors can occur (see EN 954 and
ISO 13849-1 and ISO 13849-2 or the information leaflet No. 005 about "Grav‐
ity-loaded axes (vertical axes)").
Please pay particular attention to the following:
●
Corrosion on friction surfaces, as well as dust, perspiration and sedi‐
ments reduce the braking effect.
●
Grease must not hit the friction surface.
●
Overvoltage and too high temperatures can durably weaken the perma‐
nent magnets and thus the brake.
Engaging of the holding brake is no longer ensured, if the air gap between
armature and pole is improperly increased due to deterioration. In this case,
no braking occurs.
9.12.3
System Safety for Holding Brakes
Control of the Holding Brake dur‐
ing Operation (Recommendation)
Malfunctions that occur in the course of the operating period and that may
change the design parameters or the operating conditions must be recog‐
nized and eliminated within an appropriated period of time. We recommend
to check the function and the state of the holding brake in regular intervals.
DOK-MOTOR*-MKE*GEN2***-PR06-EN-P
Rexroth MKE Synchronous Motors for Potentially Explosive Areas acc. to ATEX and UL/CSA
Bosch Rexroth AG
91/135
Operating Conditions and Application Notes
LSA Control S.L. www.lsa-control.com [email protected] (+34) 960 62 43 01
