Datalogic AREX 401, Руководство пользователя

Страница: 112 / 148

UNDERSTANDING SLO: SAFE LASER OFF SAFETY CONSIDERATIONS ACCORDING TO EN ISO 13849-1:2015
104
AREX™ 401
Example 3
Risk Analysis of a manual loading laser processing machine.
• Operative cycle: 600 pcs/hour (load every minute)
• Dedicated enclosures prevent laser emission during laser processing
• An interlocked door is dedicated to part loading
• Operator are NOT SKILLED 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: HAZARD , direct scattered laser radiation
• RISK SEVERITY: SEVERE (irreversible eye damage)
• RISK FREQUENCY: FREQUENT (1/minute)
• AVOIDANCE PROBABILITY: NOT POSSIBLE
RISK REDUCTION: INTERLOCKED 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™ 401 SLO
Input
Subsystem
Logic
Subsystem
Output
Subsystem
PLr=PLe