Risk Reduction - Mitsubishi Electric Melsec-QS Series Safety Application Manual

3
RISK ASSESSMENT AND SAFTY LEVEL

3.1.1 Risk reduction

As a result of the risk assessment, when the machinery is judged as unsafe, the risk
reduction must be performed.
The measures for the risk reduction are standardized in ISO12100 and ISO14121 as
shown in Figure3.2.
1) Inherently safety design
2) Safeguarding
3) Additional precautions
4) Risk reduction with cautions for use
According to the procedure of Figure3.1, combine and execute the several risk reduction
measures until the machine is safe.
3
3.1 Risk Assessment
- 2
3.1.1 Risk reduction
Protection by isolation
Protection by stop
Emergency stop device
Ensuring of the energy
zero status
Risk condition indication
and warning
Attached document and
instruction manual
Figure3.2 Risk reduction
Safety barrier
Protective
device
(Referred to ISO12100 and 14121.)