Implementation of safety requirements from applicable standards

The safety-related function block has been developed according to the safety requirements (from applicable standards) listed in this section. All other requirements from these standards must be observed when implementing the safety-related function.

This section describes either how the function block meets the requirements of the standards or what measures need to be taken to meet the requirements of the standards.

Standards

Context / Requirement

Implementation

EN ISO 12100-2

Start-up after failure of supply voltage / spontaneous restart

The function block supports a start-up inhibit and restart inhibit of the function block after

  • start-up of the Safety Module or activation of the function block

  • removing an STO or SS1 request for the safety-related function.

You are responsible for planning and implementing the start-up behavior according to your risk analysis. To prevent an unintended start-up, you may need to perform an additional function start once the safety-related function has been reset. This will depend on both the results of the risk analysis and the signal path of the reset signal.

EN ISO 13849-1

Manual reset device

The Reset input supports the function of a manual reset device.

NOTE:

Resetting does not occur with a negative (falling) edge, as specified by standard ISO 13849-1, but with a positive (rising) edge.

ISO 13850

Positive opening operation

Only use approved control devices, which conform to standard ISO 13850.

ISO 13850

Using wires and cables as manual controls

It is your responsibility to meet the requirements of this standard, according to the risk analysis you carried out.

EN 60204

Safety of machinery

The function block executes the stop categories 0, 1 and 2.

IEC 61800-5-2

Adjustable speed electrical power drive systems - Part 5-2: Safety requirements - Functional Safety

Monitoring of safety-related functions according to section ...

  • 4.2.2.2: Safe torque off (STO)

  • 4.2.2.3: Safe stop 1 (SS1)

  • 4.2.2.4: Safe stop 2 (SS2)

  • 4.2.3.1: Safe operating stop (SOS)

  • 4.2.3.4: Safely-limited speed (SLS)

  • 4.2.3.10: Safe direction (SDI)