User Manual

SAFETY
Safety handbook page - 34 -
PNSPO
Summary
general formula S = K x T +C
100mm ≤ S ≤ 500mm
S = ( 2000mm/s x T ) + 8 (d -14mm)
d ≤ 40mm
S > 500mm S = ( 1600mm/s x T ) + 8 (d -14mm)
40mm < d ≤ 70mm
S = ( 1600mm/s x T ) + 850mm
single beams S = ( 1600mm/s x T ) + 1200mm
7.1.1 Examples safety distance
Before calculating the safety distance S be sure that appropriate Type-C standard or
the risk assessment for the relevant machine will allow the chosen sensor.
Example 1:
Approach to detection zone: normal (vertical)
Stopping time of the machine: 60ms (t
2
)
Response time AOPD: 12.5ms (t
1
) typical value for F3SN-A
Detection capability: 14mm (d) finger protection
S = ( 2000mm/s x T ) + 8 ( d - 14mm )
S = ( 2000mm/s x ( 0,06s + 0,0125s )) + 8 ( 14mm-14mm )
S = 145mm
Example 2: The same machine but using AOPD with detection capability d = 30mm
(hand protection):
S = ( 2000mm/s x (0,06s+0,0125s ) + 8 (30mm-14mm)
S = 273mm
Example 3: AOPD with 4 beams
Stopping time of the machine: 300ms (t
2
)
Response time AOPD: 10ms (t
1
) max. value for F3SH-A
Beam height from floor: 300mm, 600mm, 900mm, 1200mm (table 1)
S = ( 1600mm/s x T ) + 850mm
S = ( 1600mm/s x ( 0,3s + 0,01s )) + 850mm
S = 1346mm
7.2 Finger and hand protection systems
How to choose the right AOPD for my application. EN 999 helps with a strategy:
1. Identify hazards and assess the risk (see EN 292-1 and EN 1050)
2. Type-C standard exists for the machine ?
if yes: apply the C-standard
if no: Select appropriate AOPD using Type-A and Type-B standards
3. Calculation of safety distance according EN 999
4. Incorporate the distance into machine design
5. Access to the danger zone without detection by AOPD possible ?