Safety Standards; Specifications - YASKAWA U1000 Series Technical Manual

D.4 Safe Disable Input Function
D.4 Safe Disable Input Function
This section explains the Safe Disable function. Contact Yaskawa if more information is required.

◆ Safety Standards

The TUV mark indicates compliance with safety standards.
Figure D.12
Table D.14 Safety Standards and Applicable Harmonized Standards
Safety Standards
Safety of Machinery
The Safe Disable function is in compliance with these standards.

◆ Specifications

The Safe Disable inputs provide a stop function in compliance with "Safe Torque Off" as defined in the IEC/EN
61800-5-2. Safe Disable inputs have been designed to meet the requirements of the EN ISO 13849-1 and IEC/EN 61508.
A Safe Disable Status Monitor for error detection in the safety circuit is also provided.
Inputs / Outputs
Response Time from Input Open to Drive Output Stop
Response Time from Input Open of H1 and H2 Terminals to
EDM
Failure Probability
Performance Level
HFT (Hardware Fault Tolerance)
Classification of Subsystem
◆ Precautions
DANGER! Sudden Movement Hazard. Improper use of the Safe Disable function will result in serious injury or death. Make sure the
entire system or machinery uses the Safe Disable function in compliance with safety requirements. When implementing the Safe
Disable function into the safety system of a machine, a thorough risk assessment and validation for the whole system must be carried
out to ensure it complies with relevant safety norms (e.g., ISO/EN 13849, IEC/EN 61508, IEC/EN 62061).
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). Ensure this condition will not affect 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.
608
Functional Safety
EMC
Table D.15 Specifications for Safe Disable Function
• Input signal specifications
Signal ON level: 18 to 28 Vdc
Signal OFF level: -4 to 4 Vdc
• Inputs: 2
Safe Disable inputs H1, H2
• Outputs: 1
Safe Disable Monitor output EDM (DM+, DM-)
less than 3 ms
less than 4 ms
Demand Rate Low PFD = 11.04E
Demand Rate High or
PFH = 2.67E
Continuous
The Safe Disable inputs satisfy the following requirements (DC from EDM considered).
Performance Level (PL) e according to EN ISO 13849-1
N = 1
Type B
Figure D.12 TUV mark
IEC/EN 61508 series: 2010 (SIL3)
IEC 62061/A1:2012 (SIL CL 3)
EN 62061/A1:2013 (SIL CL 3)
IEC 61800-5-2: 2007 (SIL3)
EN 61800-5-2: 2007 (SIL3)
EN ISO 13849-1/AC:2008 (PL e (Cat.3))
IEC/EN 61326-3-1: 2008 (EMC-related)
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YASKAWA ELECTRIC SIEP C710636 02B YASKAWA U1000 Technical Manual
Applicable Harmonized Standards