5.4 EN81-20 Compliant Circuit with one Motor Contactor
132 YASKAWA SIEPYEULA5001C LA500 Technical Manual
5.4 EN81-20 Compliant Circuit with one Motor Contactor
You can use the safe disable circuit to install the drives in an elevator system using only one motor contactor
instead of two. In such a system, follow these guidelines to comply with EN81-20:
• Design the circuit so that the inputs H1 and H2 are opened and the drive output shuts off when the safety chain
is interrupted.
• Program a drive digital output as Safe Disable feedback [H2-xx = 58]. Implement this feedback signal 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.
• Select and install all contactors and wiring in compliance with EN81-20.
• Use the safe disable inputs H1 and H2 to enable/disable the drive. Set the input logic to Source Mode.
Figure 5.17 Wiring Example
Note:
• The drive output will immediately shut off when either of the inputs H1 or H2 is opened. In this case the brake should apply
immediately in order to prevent uncontrolled movement of the elevator.
• Terminals H1 or H2 must be closed prior to setting the Up/Down command.
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