Using the safe disable function, Safe disable circuit – Yaskawa U1000 Industrial MATRIX Drive User Manual
Page 90
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Using the Safe Disable Function
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, Category 3 PLe, and IEC/EN 61508,
SIL3.
A Safe Disable Status Monitor for error detection in the safety circuit is also provided.
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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 use either 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 Safe Disable terminals DM+ and DM-.
for signal specifications when using this output.
Additionally, a Safe Disable monitor function can be assigned to a digital output (H2-oo = 58).
24 Vdc
Power Module
Safety
Outputs
Motor
Gate Block 2
Gate Block 1
Control
Circuit
Main Power
H1
H2
HC
U1000
Slide Switch S6
Jumper S3
Setting:
SOURCE
>=1
DM+
DM-
Feedback
Safety Relay or PLC
with safety functionality
N.C.
N.O.
Figure i.57 Safe Disable Function Wiring Example (Source Mode)
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Disabling and Enabling the Drive Output (“Safe Torque Off”)
illustrates the Safe Disable input operation.
H1, H2 Input
Drive Output
ON (Safe Disable off)
Normal operation
OFF (Safe Disable activated)
Safe Torque-Off
Run Command
Run
Stop
Baseblock (Not Safe!)
Output
Frequency
Motor coasts
to stop
Run Command must be
released to deactivate
Safe Disable
Drive is ready for
operation
Figure i.58 Safe Disable Operation
Entering the “Safe Torque Off” State
When one or both Safe Disable inputs are open, the motor torque is shut off by switching off the drive output. If the motor
was running before the Safe Disable inputs opened, then the motor will coast to stop regardless of the stopping method set in
parameter b1-03.
i.9 Standards Compliance
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YASKAWA ELECTRIC TOEP C710636 04C U1000 Industrial MATRIX Drive Quick Start Guide