D.5 EN81-1 Conform C ircuit w ith one M otor Contactor
D.5 EN81-1 Conform Circuit with one Motor Contactor
The safe disable circuit can be utilized to install the drive in an elevator system using only one motor contactor instead of
two. In such a system the following guidelines have to be followed for compliance to EN81-1:1998:
• The circuit must be designed so that the inputs H1 and H2 are opened and the drive output shuts off when the safety
chain is interrupted.
• A drive digital output must be programmed as Safe Disable feedback (H2-DD = 58). This feedback signal must be
implemented in the contactor supervision circuit of the controller that prevents a restart in case of a fault in the Safe
Disable circuit or the motor contactor.
• All contactors and wiring must be selected and installed in compliance with the EN81-1:1998.
• The safe disable inputs H1 and H2 must be used to enable/disable the drive. The input logic must be set to Source
Mode.
Refer to Sinking/Sourcing Mode Selection fo r Safe Disable Inputs on page 68
for details on setting jumper
S3.
The figure below shows a wiring example.
Note: 1. The drive output will immediately shut off w hen either o f the inputs H1 or H2 is opened. In this case the brake should apply
immediately in order to prevent uncontrolled m ovem ent o f the elevator.
2. The drive output can only be activated when neither an Up nor a D ow n comm and is active, i.e., terminals H1 and H2 m ust be closed
prior to setting the U p/D own command.
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YASKAWA ELECTRIC SIEP C710616 33D YASKAWA AC Drive L1000A Technical Manual
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