This document and the information contained herein, is the exclusive property of MODE. And represents a nonpublic,
confidential and proprietary trade secret that may not be reproduced, disclosed to third parties, or otherwise employed in
any manner. whatsoever without the express written consent of MODE. Copyright © (2016) MODE. Allrights reserved.
4.2.2 Safety Functions
Hoisting Unit
The emergency stop button is used to tum off power to the system in
dangerous situations. The emergency stop button cuts the supply voltage
to the system from the main contactor. Always eliminate the danger before
releasing the emergency stop button. There are several types of
emergency stop buttons but they are always red.
Slipping clutch protects the machinery against overloading. Overload
occurs at around110% of the rated capacity of the hoist. When activated,
the slipping clutch prevents further hoisting but it is still possible to lower the
load. Never use the slipping clutch to assess the weight of the load.
Second disc
brake(holding
brake) (option)
The second disc brake (holding brake) supports the load if the main brake
fails. The main brake and auxiliary brake are assembled on the same hub.
When the hoisting motion is required, the service brake and the auxiliary
brake are energized simultaneously from the brake board. When the
hoisting motion is topped, the service brake is switched off immediately
while the auxiliary brake stays energized for a few milliseconds by the
motor inductive effect.
Upper and lower limit
switch
The hoisting limit switch is adjusted to prevent the hoist from traveling too
high or low. The upper limit switch stops upward movement so that only
lowering is possible. The lower limit switch stops downward movement so
that only hoisting is possible.
4.3 Signs
4.3.1 Safety Signs
Safety signs inform the operator about potential hazards and also about special features
concerning the product's operation.
Failure to avoid dangers identified by these signs can result in death or
serious injury.
0n electric cubicle and other cubicles.
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