A1
L
1
"
!
L
2
A2
Figure 16: Exit monitoring
!
Hazardous area
"
ESPE
The following is true for exit monitoring:
•
The signals of the muting sensors are on the extension connection. Alternatively,
the input of a muting signal can be moved to the system connection.
•
Override is active. The number of override statuses is limited to 5.
•
The muting end by ESPE function is active
•
Concurrence monitoring is configured
•
A total muting time is active
•
The muting signal inputs are monitored for cross-circuits
•
Exit monitoring is terminated when the ESPE is free for longer than 0.5 s and a
muting end delay of 0.2 s has elapsed
•
If a muting sensor is clear, sensor gap monitoring will expire, meaning that a mut‐
ing sensor may not be clear longer than 0.5 s
•
If the sensor gap monitoring (muting sensor) of 0.5 s has been exceeded, muting
ends after a muting hold time of 4 s
Calculating minimum distance
Calculating minimum distance without using a muting connector:
L
1
≥ v × 0.060 s
v × t > L
1
+ L
2
Calculating minimum distance with use of a muting connector:
L
1
≥ v × 0.122 s
v × t > L
1
+ L
2
The following rules apply:
•
L
1
< 200 mm; minimum distance between the beams of the ESPE and the detec‐
tion of the muting sensors in m
•
v = Speed of the material (e.g. of the conveyor belt) in m/s
•
t = Muting hold time in s (with activated muting end by ESPE function)
•
L
2
= Length of the material in conveying direction in m
Complementary information
Muting sensors can be attached to muting arms. Suitable muting arms are available as
an accessory from SICK.
PROJECT PLANNING
4
8024782/2019-11-19 | SICK
O P E R A T I N G I N S T R U C T I O N S | deTem4 A/P
31
Subject to change without notice