Yaskawa U1000 Industrial MATRIX Drive - Manual (Page 89)

n 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 ISO/EN 13849-1 and IEC/EN 61508.
A Safe Disable Status Monitor for error detection in the safety circuit is also provided.
Table i.32 Specifications for Safe Disable Function
Inputs/Outputs
• 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-)
Response Time from Input Open to Drive
Output Stop
Shorter than 3 ms
Response Time from Input Open of H1 and H2
Terminals to EDM
Shorter than 4 ms
Failure Probability
Demand Rate Low PFD = 8.14E -6
Demand Rate High/
Continuous
PFH = 1.96E -9
Performance Level
The Safe Disable inputs satisfy the following requirements (DC from EDM considered) Performance
Level (PL) e according to ISO/EN 13849-1
HFT (Hardware Fault Tolerance) N = 1
Classification of Subsystem Type B
u Precautions
DANGER! Sudden Movement Hazard. Improper use of the Safe Disable function can result in serious injury or even death. Make sure the
whole 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, perform a thorough risk assessment for the entire system to assure compliance with
relevant safety norms.
DANGER! Sudden Movement Hazard. When using a PM motor, even if the drive output is shut off by the Safe Disable function, a breakdown
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.
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.
DANGER! Sudden Movement Hazard. The motor will move when an external gravitational force in the vertical axis is applied even if the
Safe Disable function is in operation. Failure to comply may result in serious injury or death.
DANGER! Sudden Movement Hazard. Connect the Safe Disable inputs to the devices in compliance with safety requirements. 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 2 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 2 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, an EMC filter must be used.
i.9 Standards Compliance
YASKAWA ELECTRIC TOEP C710636 04C U1000 Industrial MATRIX Drive Quick Start Guide 89