Safety Functions Of Arex™ 400
User Manual 91
Example 3
Risk Analysis of a manual loading laser processing machine.
• Operative cycle: 500 pcs/hour, 1 shift (8h/shift) 250 days /year
• Dedicated enclosures prevent laser emission during laser processing
• An interlocked door is
dedicated to part loading
• Operator are NOT SK
ILLED on laser risks and do NOT have DPI
• In case of access to marking area, laser is
disabled, system is not stopped
LASER RISK ASSESSMENT: H
AZARD, direct scattered laser radiation
• RISK SEVERITY: SEVERE (irreversible eye damage)
•RISK FREQUENCY: FREQUENT (1/minute)
• AVOIDANCE PROBABILITY: NOT POSS
IBLE
RISK REDUCTION: INTELO
CKED DOOR
Estimation of PLr for door interlock safety function
• SEVERITY: SEVERE S2
• FREQUENCY: FREQUENT F2
• POSSIBILITY OF AVOIDING HAZARD: NOT POSSIBLE P2
Severity of injury (S)
S1 Slight (normally reversible injury)
S2 Serious (normally irreversible injury or death)
Frequency and/or exposure time to hazard (F)
F1 Seldom to less often and/or exposure time is short
F2 Frequent to continuous and/or exposure time is long
Possibility of avoiding hazard or limiting harm (P)
P1 Possible under specific conditions
P2 Scarcely possible
PLr = PLe
Restart: automatic
Door Switch Safety Controller
Arex™ 400 SLO - Safety Circuit
Input
Subsystem
Logic
Subsystem
Output
Subsystem
PLr=PLe
To Next Page
Loading...
Need help?
General
