D.4 Safe Disable Input Function - YASKAWA L1000A Technical Manual

D.4 Safe Disable Input Function

This section explains the Safe Disable function and how to use it in an elevator installation. Contact Yaskawa if more
information is required.
◆ Specifications
The Safe Disable inputs provide a stop function in compliance with "Safe Torque Off" as defined in the IEC61800-5-2.
Safe Disable inputs have been designed to meet the requirements of the ISO13849-1 Category 3 PLd, and IEC61508,
SIL2.
A Safe Disable Status Monitor for error detection in the safety circuit is also provided.
Inputs / Outputs
Operation Time
Failure Probability
Performance Level
Note: Model CIMR-L 4A0260 is not compliant with Safety Standard. For more information, contact your nearest Yaskawa
representative or our sales office.
◆ Precautions
DANGER! Sudden Movement Hazard. Improper use of the Safe Disable function will result in serious injury or death. Make sure the
whole system or machinery that the Safe Disable function is used in complies with safety requirements. When implementing the Safe
Disable function into the safety system of a machine, a thorough risk assessment for the whole system has to be carried out to assure
it complies with relevant safety norms (e.g., EN954/ISO13849, IEC61508, EN/IEC62061).
DANGER! Sudden Movement Hazard. When using a PM motor, even if the drive output is shut off by the Safe Disable function, a
break down of two output transistors can cause current to flow through the motor winding, resulting in a rotor movement for a maximum
angle of 180 degrees (electrically). Make sure such a situation would have no effect on the safety of the application when using the
Safe Disable function. Failure to comply will result in death or serious injury.
DANGER! Electrical Shock Hazard.The Safe Disable function can switch off the drive output, but does not cut the drive power supply
and cannot electrically isolate the drive output from the input. Always shut off the drive power supply when performing maintenance or
installations on the drive input side as well as the drive output side. Failure to comply will result in death or serious injury.
WARNING! Sudden Movement Hazard. When using the Safe Disable inputs, make sure to remove the wire links between terminals
H1, H2, and HC that were installed prior to shipment. Failing to do so will keep the Safe Disable circuit from operating properly and can
cause injury or even death.
NOTICE: All safety features (including Safe Disable) should be inspected daily and periodically. If the system is not operating normally,
there is a risk of serious personal injury.
NOTICE: Only a qualified technician with a thorough understanding of the drive, the instruction manual, and safety standards should be
permitted to wire, inspect, and maintain the Safe Disable input.
NOTICE: From the moment terminal inputs H1 and H2 have opened, it takes up to 1 ms for drive output to shut off completely. The
sequence set up to trigger terminals H1 and H2 should make sure that both terminals remain open for at least 1 ms in order to properly
interrupt drive output.
NOTICE: The Safe Disable Monitor (output terminals DM+ and DM–) should not be used for any other purpose than to monitor the
Safe Disable status or to discover a malfunction in the Safe Disable inputs. The monitor output is not considered a safe output.
NOTICE: When utilizing the Safe Disable function, use only the EMC filters recommended in
YASKAWA ELECTRIC SIEP C710616 38A YASKAWA AC Drive L1000A Technical Manual
Two Safe Disable inputs and one EDM output according to ISO13849-1 Cat.3 PLd, IEC61508 SIL2.
Time from input open to drive output stop is less than 1 ms.
Demand Rate Low PFD = 5.15E
Demand Rate High or
PFH = 1.2E -9
Continuous
The Safe Disable inputs satisfy all requirements of Performance Level (PL) d according to ISO13849-1 (DC from
EDM considered).
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D.4 Safe Disable Input Function
EMC Filter Installation on page 415.
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