The following applies to cross-muting:
•
O
verride is active. The number of override statuses is limited to 5.
•
Concurrence monitoring is configured
•
A total muting time is active
•
The muting signal inputs are monitored for cross-circuits
•
Cross-muting ends if one of the two muting sensors has become clear and the
sensor gap monitoring of 0.5 s has passed
Calculating minimum distance
Calculating minimum distance without using a muting connector:
•
L
1
≥ v × 0.060 s
Calculating minimum distance with use of a muting connector:
•
L
1
≥ v × 0.122 s
The following rules apply:
•
L
1
= Minimum distance between the beams of the ESPE and the detection of the
muting sensors in m
•
v = Speed of the material (e.g. material on a conveyor belt in m/s)
Complementary information
Cr
oss-muting can be combined with partial blanking.
A muting signal can be shifted by the extension connection on the system connection.
Further topics
•
"D
ata sheet", page 127
•
"Override", page 42
•
"Sensor gap monitoring", page 44
•
"Cross-circuit monitoring", page 44
•
"End of muting by ESPE", page 43
4.3.6.2.2 Exit monitoring
Overview
Exit monit
oring checks that only material moves out of the hazardous area, while
persons cannot enter the dangerous area.
Arrangement of the muting sensors
T
he muting sensors must be arranged so that the entire lengths of both the material
and the means of transport are detected by the sensors or the ESPE. There may not be
any detectable gaps, otherwise muting is ended too soon (reduced system availability).
b
Position muting sensors on the side of the hazardous area.
NOTE
Pr
event mutual sensor interference.
The signals of the muting sensors are on the extension connection. Alternatively, the
in
put of a muting signal can be moved to the system connection.
Principle of operation
The muting sensors (A1 and A2) are arranged serially in the hazardous area and detect
material before it passes through the ESPE 2.
Once muting sensors A1 and A2 are actuated, muting is active.
4 P
ROJECT PLANNING
40
O P E R A T I N G I N S T R U C T I O N S | deTec4 Ex II 3GD 8023872/18YZ/2021-01-14 | SICK
Subject to change without notice
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