nord B 1050, Operating And Assembly Instructions Manual

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Industrial gear units – Operating and Assembly Instructions
52 B 1050 en-4419
3.23.1 Automatic lining wear correction (option: LWC)
While being operated, the brake lining of a mechanical brake is subject to wear. The option LWC
compensates for this wear by automatically adjusting the brake lining. But the adjusting range is
limited. To maintain an even braking effect, you must check and if necessary correct the adjustment
(residual stroke) in line with the manufacturer’s specifications and during or briefly after commissioning
in particular.
Information
Decreasing braking effect
The braking effect will decrease if the mechanical wear of the brake lining exceeds the adjusting
range of the LWC option. This has a negative effect on the brake response time and the braking
distance.
3.23.2 Limit switch to indicate the brake lining wear (option SLW)
While being operated, the brake lining of a mechanical brake is subject to wear. The option SLW
indicates when the wear limit is reached and the brake lining must be replaced.
3.23.3 NC/NO contacts (option: SO/SC)
The option SO/SC comprises limit switches that make it possible to report the switching state of the
mechanical brake (open/closed).
A higher level control unit is responsible for the evaluation. With proper evaluation, the option SO/SC
represents a safety element that, for example, prevents the drive from starting while the brake is
applied.
The correct function of the limit switches must be checked during commissioning.
3.23.4 Manual release and manual release with limit switch (option: MR, Option: MRS)
WARNING
Unexpected movement
Operating the manual release will disengage the brake. This can result in unexpected drive
movements even if the drive is switched off electrically.
• Safeguard the hazard zone.
• Secure the drive against impermissible movement before actuating the manual release.
• Disengage the machine.
• Do not lock the manual release.