Using The Safe Disable Function; Safe Disable Circuit; Enabling And Disabling The Drive Output ("Safe Torque Off") - Omron Q2A-A Series Installation & Operation Instructions

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Using the Safe Disable Function

Safe Disable Circuit

The Safe Disable circuit has two isolated channels (terminals H1 and H2) that stop the output transistors. The
input can use the internal power supply of the drive.
Set the EDM function to one of the MFDO terminals [H2-xx = E or 10E] to monitor the status of the Safe Disable
function. This is the "Safe Disable monitor output function".

Enabling and Disabling the Drive Output ("Safe Torque Off")

Example of drive operation when as the drive changes from the "Safe Torque Off" status to usual operation.
Switching from Usual Operation to "Safe Torque Off"
Turn OFF (open) safety input terminal H1 or H2 to enable the Safe Disable function. When the Safe Disable
function is enabled while the motor is operating, the drive output and motor torque turn off and the motor always
coasts to stop. The b1-03 [Stopping Method Selection] setting does not have an effect on the stopping method.
The "Safe Torque Off" status is only possible with the Safe Disable function. Clear the Run command to stop the
drive. Turning off drive output (a baseblock condition) ≠ "Safe Torque Off".
Note:
A maximum of 3 ms will elapse from when terminals H1 or H2 shut off until the drive switches to the "Safe Torque Off" status. Set the
OFF status for terminals H1 and H2 to hold for at least 2 ms. The drive may not be able to switch to the "Safe Torque Off" status if
terminals H1 and H2 are only open for less than 2 ms.
Turn OFF terminals H1 and H2 after the motor fully stops. This will prevent the motor from coasting to stop during usual operation.
TOMPYEUOQ2A03B AC Drive Q2A Installation and Operation Instructions
Figure 1.8 Safe Disable Function Wiring Example
Figure 1.9 Safe Disable Operation
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