Technical data

Safety Notes Holding Brakes
The permanent magnetic brake is no safety brake. This means, a torque re-
duction by non-influenceable disturbance factors can occur (see DIN EN 954/
03.97 or the leaflet about vertical axes SMBG).
Particularly heed:
● Corrosion on friction surfaces, as well as dust, perspiration and sediments
reduce the braking effect.
● Grease may not hit the friction surface.
● Over voltage and too high temperatures can weaken the permanent mag-
nets and therewith the brake.
Engaging of the brake is no longer ensured, if the air gap among armature and
pole is improper heightened by deterioration. In this case, no braking occurs.
9.9.3 Drive of Holding Brakes
The holding brakes are driven over the function drive enable (AF) by the In-
draDrive control devices. Details about overview and control possibilities are
described within the function description of IndraDrive control devices.
The following conditions have to be ensured during operation to make a safe
function of the holding brake sure.
Under worst installation conditions of the connection cables and in worst load
condition of the supply, a voltage with a tolerance of 24V +/-10% must be pro-
vided on the motor .
If a voltage divergence occurs due to a failure during operation, this failure must
be identified and corrected immediately. For failure detection, we recommend
a monitoring device of the undervoltage.
Before start-up and in operation, the function of the holding brake must be tes-
ted in periodic intervals of, e.g., 8 hours. A defined torque is generated by the
motor, which actuates the motor insignificantly. It is tested, if the holding brake
released completely. For further information, please see firmware-function de-
scription of IndraDrive drive devices.
9.10 Acceptances and Authorizations
9.10.1 CE-Sign
Certificate of conformity certifying the structure of and compliance with the valid
EN standards and EC guidelines are available for all IndraDyn S motors. If
necessary, these certificates of conformity can be requested from the respon-
sible sales office.
The CE symbol is applied to the motor type label of IndraDyn S motors.
Fig.9-21: CE symbol
9.10.2 UR, cUR Listing
The MSK motors listed below have been presented to the UL authorities ”Un-
derwriters Laboratories Inc.®”- authorities „Underwriters Laboratories Inc.®“
Power supply voltage
Monitoring of undervoltage
Functional test
Declaration of conformity
Project Planning Manual | Rexroth IndraDyn S Electric Drives
and Controls
| Bosch Rexroth AG 169/194
Operating Conditions and Application Notes