Integration And Interfaces To Other Systems; Determining The Achieved Safety Level - Danfoss Vacon OPTEA Operating Manual

VACON® NXP Advanced Safety Options
Operating Guide
The Advanced safety option board forces the AC drive to the safe state, for example, if there is an error detected in the safety sys-
tem. Other situations when the safe state is enforced are, for example, the parameterization phase and during the start-up of the
drive.

3.3 Integration and Interfaces to Other Systems

When the Advanced safety option board is integrated to a safety system, the system designer and/or the operator is responsible for
these things:
• Making an initial system-level risk assessment and reassessing the system any time a change is made.
• The setup and suitability of parameters, sensors, and actuators used in the system.
• Validation of the system to the correct safety level.
• Maintenance and periodic testing.
• Controlling the access to the system, including password handling.
External systems can collect information from the Advanced safety option board in a few different ways.
The option board related fault and violation information is available in the fault log of the AC drive like other faults. This data must
be interpreted differently to the fault data of the AC drive. See chapter Fault tracing.
The option board has configurable outputs where desired information can be set to be sent to external systems.
The status data can be received over a safe fieldbus.

3.4 Determining the Achieved Safety Level

SAFETY AWARENESS IN DESIGN
This chapter is an example and contains simplifications. Using only this data in designing the system can damage the equipment.
-
Do not use this chapter as a template for designing your system.
-
Perform the design work carefully.
The achieved safety level depends on the whole safety chain. The AC drive with integrated safety functions is only one component
in the safety chain.
The things related to the AC drive that affect the achieved safety level:
• The used speed measurement combination.
• The implementation of the violation response and of the fault response. In most cases it is realized via the STO option board
(the OPTAF option board for the VACON
The components of the safety chain that affect the achieved safety level:
• The controllers (for example, the safety PLC) that control the safety functions
• The stop switches
• The wiring
EXAMPLE
Implementation of the STO safety function, consisting of these subsystems.
• Emergency stop switch: Pilz PIT es Set/1-family using two N/C contacts. B10
62061) for one channel.
• The OPTAF option board, version VB00328H (141L7786). A two-channel STO option board for the NX family.
• The Advanced safety option board OPTBL.
Check the corresponding product guides for the safety values and usage instructions.
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NX products).
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Overview of the System
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