YASKAWA A1000 Technical Manual page 252

C.3 Safe Disable Input Function
The input can use the internal power supply of the drive or an external power supply and it will support Sink mode or Source
mode. the mode selected for the digital input terminals S1 to S8 by switch S3 will also be used for the Safe Disable inputs.
Refer to Sinking/Sourcing Mode Switch for Digital Inputs on page 66
The Safe Disable Monitor uses a single channel photocoupler output.
specifications when using this output.
Safety Relay or PLC
with safety functionality
n Disabling and Enabling the Drive Output ("Safe Torque Off")
Note: Terminals H1, H2, DM+, and DM- on 600 V class models are designed to the functionality, but are not certified to EN61800-5-1, ISO13849
Cat. 3, IEC/EN61508 SIL2, Insulation coordination: class 1.
Figure C.12 illustrates the Safe Disable input operation.
Run Command
H1, H2 Input
Drive Output
Entering the "Safe Torque Off" State
Note: Terminals H1, H2, DM+, and DM- on 600 V class models are designed to the functionality, but are not certified to EN61800-5-1, ISO13849
Cat. 3, IEC/EN61508 SIL2, Insulation coordination: class 1.
Whenever either one Safe Disable input or both inputs 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.
Notice that the "Safe Torque Off" state can only be achieved using the Safe Disable function. Removing the Run command
stops the drive and shuts the output off (baseblock), but does not create a "Safe Torque Off" status.
Note: To avoid an uncontrolled stop during normal operation, make sure that the Safe Disable inputs are opened first when the motor has completely
stopped.
Returning to Normal Operation after Safe Disable
Note: Terminals H1, H2, DM+, and DM- on 600 V class models are designed to the functionality, but are not certified to EN61800-5-1, ISO13849
Cat. 3, IEC/EN61508 SIL2, Insulation coordination: class 1.
The Safe Disable function can only be deactivated when a Run command is not active.
252
Safety
Outputs
Feedback
Figure C.11 Safe Disable Function Wiring Example (SINK Mode)
Output
Frequency
Run
ON (Safe Disable off)
Normal operation
Figure C.12 Safe Disable Operation
for more information.
Refer to Output Terminals on page 62
24 Vdc Control
HC
Circuit
Jumper S3
Setting:
SINK
H1
Gate Block 1
H2
Gate Block 2
DM+
>=1
DM-
Drive
Motor coasts
to stop
Run Command must be
released to deactivate
Safe Disable
Stop
OFF (Safe Disable activated)
Safe Torque-Off Baseblock (Not Safe!)
YASKAWA ELECTRIC TOEP C710616 41B YASKAWA AC Drive - A1000 Quick Start Guide
Main Power
N Power Module P
M
Drive is ready for
operation
for signal