Standards Compliance
5
5.5 EN81-20 Compliant Circuit with no Motor Contactor
YASKAWA SIEPYEULA5001C LA500 Technical Manual 133
5.5 EN81-20 Compliant Circuit with no Motor Contactor
You can use the safe disable circuit to install the drives in an elevator system using no motor contactor. 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.
• Use the safe disable inputs H1 and H2 to enable/disable the drive. Set the input logic to Source Mode.
Figure 5.18 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.
• A drive digital output must be programmed as Safe Disable feedback [H2-xx = 58]. This feedback signal can be implemented in the
contactor supervision circuit of the controller that monitors a fault in the Safe Disable circuit.
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