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KW Aufzugstechnik GmbH OPERATING MANUAL DAVID-613
DAVID-D613-V125-E 13.04.2021 Page - 15 -
1.5
SELF-MONITORING OF THE BRAKING ELEMENTS after EN81- 1/2:1998+A3:2009
1.5.1 Function description Monitoring of the Braking Elements
In General
In gearless drives the service brakes have been used as a protective device for the car moving
against overspeed. The braking devices are therefore redundant and are monitored by a micro-switch
/ proximity switch per circuit. These switches are used to monitor the braking elements for protection
against inadvertent movement of the car.
With traction elevator systems to EN81-1 with certified braking devices to the new standard EN 81-
1:1998 + A3: 2009, like e.g. the types MAYER, Warner, ..., as a operating brake on the drives of the
companies Wittur-SAD, Thyssenkrupp-Liftequipe, Ziehl-Abegg, Tornado, Sassi,..., or with A3 Certifi-
cation brake control unit on the driving wheel, like the types of MAYER, Warner, ..., on the drives of
Thyssenkrupp-Liftequipe-NBS, Sassi,...., the monitoring is done by independent input channels of
brake control elements monitoring of the regulation unit.
At hydraulic lifts of the company ALGI and the types AZRS and AZFR, according to the new standard
EN 81-2:1998 + A3: 2009, the down travel is initiated with two series-connected hydraulic valves, which
have a monitoring of the open and closed position. The monitoring is done by independent input chan-
nels of brake control elements monitoring of the regulation unit. The following description is part of the
manual.
Function steps
A) Before Starting - Motor and Controller are in standby state
In the standby state is expected that the brake element is not active and the brake switch elements
have the following signal levels:
Brake element monitoring input Expected status
Configured as Closer (NO) 0V Signal level at the monitoring input
Configured as Opener (NC) +24V Signal level at the monitoring input
If there is no expected signal levels at the control DAVID-606/613/2005, it locks with the error messages
" F51 brake element function " or " F54 brake element synchronization ".
Only by RESET in menu C0 or a reset pulse at an input to the programmed input function can control
if DAVID E506-606/613/2005 will be unlocked.
B) Start – Braking elements are opening
With activation of the braking element is "open brake element monitoring" period started. Within this
time window, it is expected that the braking element is activated and the signal change is performed on
the brake element monitoring switches:
Brake element monitoring input Expected status
Configured as Closer (NO) 0V Signal level at the monitoring input
Configured as Opener (NC) +24V Signal level at the monitoring input
If the signal change within the time frame, or the synchronization of input channels is not guaranteed,
the control DAVID-606/613/2005 lock with the error message "
F51 brake element function
" or "
F54
brake element synchronization ". Only by RESET in menu C0, the controller DAVID-606/613/2005
will be unlocked.
Solely through the on / off switching of the controller, the controller is not unlocked, i.e. if the error
message F51 or F54 is applied and the system shuts off and then switched on again, the control with
the appropriate error message is locked.