Using The Safe Disable Function - YASKAWA U1000 Series Technical Manual

D.4 Safe Disable Input Function
WARNING! Sudden Movement Hazard. If the motor is subjected to an external force, use a mechanical brake that meets the safety
requirements of entire system or machinery to stop the machine connected to the load. The motor will move when an external
gravitational force in the vertical axis is applied even if the Safety Disable function is in operation. Failure to comply may result in
serious injury or death.
WARNING! 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.
WARNING! 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.
WARNING! 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. Failure to comply may result in serious injury or death.
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
 Using the Safe Disable Function
The Safe Disable inputs offer a stop function in compliance with "Safe Torque Off," as defined in IEC/EN 61800-5-2.
Safe Disable inputs have been designed to meet the requirements in
A Safe Disable Status Monitor for error detection in the safety circuit is also provided.
Safe Disable Circuit

The Safe Disable circuit consists of two independent input channels that can block the output transistors (terminals H1
and H2). The input can either use the drive internal power supply or an external power supply. Use jumper S3 on the
terminal board to select between Sink or Source mode with either internal or external power supply.
A photocoupler output is available to monitor the status of the Safe Disable terminals DM+ and DM-.
Terminals on page 77 for signal specifications when using this output.
Additionally a Safe Disable monitor function can be assigned to one of the digital outputs (H2- = 58).
Figure D.8
Safety Relay or PLC
with safety functionality
YEG
530
HC
Safety
Outputs
Feedback
H1
H2
DM+
DM-
U1000
Figure D.8 Safe Disable Function Wiring Example (Source Mode)
Table D.6.
24 Vdc
Control
Circuit
Jumper S3
Setting:
SOURCE
Gate Block 1
Gate Block 2
>=1
N.O.
N.C.
Slide Switch S6
YASKAWA ELECTRIC SIEP C710636 03A YASKAWA U1000 Technical Manual
EMC Filter Installation on page
Refer to Output
Main Power
Power Module
Motor
519.