IMPULSE
®
•G+ Mini Technical Manual
November 2020
Page 24
3.3 Safe Disable Function
The Safe Disable function (Safe Torque Off) can be utilized to perform a safe stop as defined in IEC/EN 61800-5-
2:2007. It is designed to meet the requirements of ISO 13849-1 (Cat. 3, PL d) and IEC/EN 61508 (SIL2).
Removing the voltage from terminal H1 (and H2, if available) disables the VFD output, i.e. the power supply to the
motor is cut by stopping the switching of the output transistors in a safe way. “Hbb” is shown on the display. Safe
Disable is applicable for induction and permanent magnet motors.
3.3.1 Installation
If the Safe Disable function is utilized, the wire link between the terminals HC and H1 (and H2, if available) that is
installed at shipment must be removed entirely.
Connect the VFD to an ISO 13849-1 (Cat. 3, PL d) interrupting device so that in case of a Safe Disable request, the
connection between the terminals HC and H1 is opened.
Figure 3-2: Safe Disable Wiring Example
Installation Precautions:
•
To ensure the Safe Disable function appropriately fulfills the safety requirements of the application a thorough
risk assessment for the safety system must be carried out.
•
The VFD must be installed in an enclosure with a protection degree of at least IP54 in order to maintain ISO
13849-1 (Cat. 3, PL d) compliance.
•
If the safety device and the VFD are installed in separate cabinets, install the Safe Disable wires in a manner
preventing short circuits.
•
The Safe Disable function does not cut the power supply to the VFD and does not provide electrical isolation.
Before any installation or maintenance work is done, the power supply of the VFD must be switched off.
•
The wiring distance for the Safe Disable inputs should not exceed 30 m (98 ft).
•
The time from opening the Safe Disable input until the VFD output is switched off is less than 1 ms.
•
When utilizing the Safe Disable function use the recommended filters manufactured by Schaffner only.
Summary of Contents for IMPULSE G+ Mini
Page 15: ...IMPULSE G Mini Technical Manual November 2020 Page 15 Figure 2 1 Long Time Storage...
Page 18: ...IMPULSE G Mini Technical Manual November 2020 Page 18 Figure 2 4 Diagram C...
Page 181: ......
Page 182: ...IMPULSE G Mini Adjustable Frequency Crane Controls Technical Manual November 2020...