Honeywell SYA14 Series Manual page 179

Protection: Normal Approach Point-of-operation guarding using a FF-LS14 safety light curtain (14 mm minimum object
detection)
Application: Small mechanical or hydraulic power press
Formula: D > 2000(t + t ) + C
S 1 2
− D
is the safety distance from the light curtain sensing field to the danger zone.
S
− V is the velocity of movement (approach speed) into the danger zone (2000 mm/sec).
− t
is the response time of the FF-LS light curtain (50 ms).
1
− t
is the stopping time of the equipment guarded by the light curtain including interconnecting components such as all
2
mechanical, electromechanical, and electronic parts such as relays, solenoids, and brakes (150 mm).
− C is additional safety distance, C = 8(minimum object detection - 14).
For example, if:
− V = 2000 mm/sec (pr EN 999).
− t
= 50 ms = 0.050 sec
1
− t
= 200 ms = 0.200 sec
2
− C = 0 mm, 8(minimum object detection - 14), then:
− D
= 2000(0.050 + 0.200) + 0 = 500 mm
S
3.3.1.2 United States Safety Distance Calculation
The safety distance D (see figure 3-3) allowed between the danger zone and the vertical sensing plane shall be no less
S
than the value calculated using the following formula:
≥ 63in(t
D + t ) + C (in) where, D
S 1 2
V is the velocity of movement (approach speed) into the danger zone; (63in/sec)
t is the response time of the FF-LS light curtain (sec)
1
t is the stopping time of the equipment (sec)
2
C is additional safety distance C = 3.4(minimum object detection - 0.276) (in)
Figure 3-3 Normal Approach Point-of-operation Guarding
Country: USA (OSHA 29 CFR 1910.217, ANSI B11.19 1990)
Protection: Normal Approach Point-of-operation guarding using a FF-LS14 safety light curtain (14 mm minimum object
detection)
Application: Small mechanical or hydraulic power press
Formula: D > V(t + t ) + C, where,
S 1 2
− D
is the safety distance from the light curtain sensing field to the danger zone.
S
− V is the velocity of movement (approach speed) into the danger zone; (63in/sec).
− t
is the response time of the FF-LS light curtain (50 ms).
1
− t
is the stopping time of the equipment guarded by the light curtain including interconnecting components such as all
2
mechanical, electromechanical, and electronic parts such as relays, solenoids, and brakes (150 ms).
− C is additional safety distance (0.93 inch). C = 3.4(minimum object detection - 0.276).
For example, if:
V = 63 in./sec (ANSI B11.1 and ANSI B11.2).
t = 50 ms = 0.050 sec
1
t = 150 ms = 0.150 sec
2
C = 0.93 in., then:
D = 63(0.050 + 0.150) + 0.93 = 13.53 in.
S
17
is the safety distance
S
D
S
107022-14 EN FR26 GLO 0100 Printed in Germany