Project Engineering
40
S
RT
= K × T + C
RT
S
RT
Safety clearance for access through the safety field
RT = Reach through
K
Approach speed with vertical safety field
K = 2000 mm/s
K = 1600 mm/s (if S
RT
> 500 mm)
T [s]
Total response time
T = (t
1
+ t
2
+ t
3
)
t
1
[s]
Response time of the ESPE
t
2
[s]
Response time of the safety switching device
t
3
[s]
Machine over-travel time
C
RT
Supplement for access through the safety field status depending on the resolution of the
ESPE
With a resolution of 14…40 mm: C
RT
= 8 × (d – 14 mm)
With a resolution of > 40 mm: C
RT
= 850 mm (standard value for arm length)
S
RO
= K × T + C
RO
S
RO
Safety clearance for access over the safety field
RO = Reach over
K
Approach speed with vertical safety field
K = 2000 mm/s
K = 1600 mm/s (if S
RO
> 500 mm)
T [s]
Total response time, T = (t
1
+ t
2
+ t
3
)
t
1
[s]
Response time of the ESPE
t
2
[s]
Response time of the safety switching device
t
3
[s]
Machine over-travel time
C
RO
Supplement for access over the safety field status
Value in accordance with table from EN ISO 13855 (see below)
a
b
C
RO
S
RO
K×T
!
Figure 3: Relationship between C
RO
and S
RO
