5.6 Safe Disable Input
224 SIEPYEUOQ2A01G AC Drive Q2A Technical Manual
5.6 Safe Disable Input
Figure 5.26 TUV Mark
The TUV mark identifies that the product complies with the safety standards.
This section gives precautions to support the Safe Disable input. Contact the manufacturer for more information.
Table 5.20 Applied Safety Standards and Unified Standards
Safety Standards Unified Standards
Functional Safety
IEC/EN 61508:2010 (SIL3)
IEC/EN 62061:2005/A2:2015 (SILCL3)
IEC/EN 61800-5-2:2016 (SIL3)
Machine Safety
ISO/EN ISO 13849-1:2015 (Cat.3, PL e)
EMC
IEC/EN 61000-6-7:2015
SIL = Safety Integrity Level.
◆ Safe Disable Specifications
The Safe Disable input provides the stop function compliant to “Safe Torque Off” defined in IEC/EN 61800-5-
2:2007. The Safe Disable input is designed to meet the requirements of EN ISO 13849-1 and IEC/EN 61508. It is
also equipped with the safety status monitor to detect safety circuit errors.
When you install the drive as a component in a system, you must make sure that the system complies with the
applicable safety standards.
Table 5.21 Specifications for the Safety Function
Item Description
Input/output
• Input: 2
Safe Disable input (H1, H2)
Signal ON level: 18 Vdc to 28 Vdc
Signal OFF level: -4 Vdc to +4 Vdc
• Output: 1
MFDO safety monitor output for external device monitor (EDM)
Response time from opening the input to stopping the drive output 3 ms or less
Response time from opening H1 and H2 terminal inputs to operating the EDM
signal
20 ms or less
Failure probability
Less frequent operation request mode PFD = 4.65E
-6
Frequent operation request mode or
continuous mode
PFH = 1.11E
-9
Performance level
The Safe Disable input complies with the performance level requirements of EN ISO 13849-
1.
HFT (hardware fault tolerance) N = 1
Type of subsystem Type B
EDM = External Device Monitoring
PFD = Probability of Failure on Demand
PFH = Probability of Dangerous Failure per Hour
◆ Safety Precautions
DANGER! Sudden Movement Hazard. Make sure that the full system or machinery in which the Safe Disable function is used
complies with safety requirements. When implementing the Safe Disable function into the safety system of a machine, do a full
risk assessment for the system to make sure that all parts of the system comply with applicable safety standards. Incorrect
application of the Safe Disable function will cause serious injury or death.
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