Pfd And Pfh Definitions; Intended Use Of The Safety Option; Mct 10 Set-Up Software With Safe Plug-In; Unit Features - Danfoss VLT Safety Option MCB 150 Installation Manual

Installation Guide | VLT® Safety Option MCB 150/151

3.2.6 PFD and PFH Definitions

Safety-related systems can be classified as operating in either a low-demand mode or in a high-demand/continuous mode.
Low-demand mode
The frequency of demands for operation made on a safety-related system is maximum once per year.
High-demand/continuous mode
The SIL value for a low-demand safety-related system is directly related to order-of-magnitude ranges on its average probability of
failure on demand (PFD). The SIL value for a high-demand/continuous mode safety-related system is directly related to the probability
of a dangerous failure per hour (PFH).

3.2.7 Intended Use of the Safety Option

RISK OF PERSONAL INJURY AND EQUIPMENT DAMAGE
Using the safety option for other purposes than what is intended, may cause personal injury and equipment damage. The
following is considered improper use:
Any component, technical, or electrical modification to the drive.
Use of the drive outside the allowed electrical and environmental conditions specified in the technical specifications and in the
VLT® AutomationDrive FC 301/FC302 Operating Guide.
Only use the safety option for its intended purpose.
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The safety option is designed for use in safety-related applications. It meets the requirements for safety functions in accordance with
IEC 61800-5-2 regarding safe motion monitoring.

3.2.8 MCT 10 Set-up Software with Safe Plug-in

Use the MCT 10 Set-up Software to configure the safety functions supported in the safety option.
• Configuration of the safety functions is required for safe motion sequences. If an error or fault occurs, these functions shut down
the power element of the drive in a safe and controlled way.
• Setting of limit values, braking ramps for the safety functions, monitoring of motion sequences.
The software:
• Runs in full with a license key. All functions are available from MCT 10 Set-up Software version 3.18.
• Supports the configuration of applications with up to maximum 256 safety options per project.
• Has a simple language setting for the user interface.
A PDF file and a commissioning report can be generated for documentation of the project and all its settings.

3.3 Unit Features

The safety option has the following features:
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