b
In the case of long muting cycles (i.e., those lasting more than 24 hours) or long
machine downtimes, check the muting sensors to make sure they are functioning
correctly.
b
If the total muting time is set to infinite (inactive), use additional measures to
prevent anyone from entering the hazardous area while muting is active.
b
If safety-related information (i.e., remote safety capable input values and/or
remote safety output values) is transmitted via a safety fieldbus network, always
take the associated delay times into account. These delay times may influence
both the system behavior and the minimum safety distance requirements associ‐
ated with the response times.
Safety notes for the electro-sensitive protective equipment (ESPE)
b
Access to the hazardous area must be reliably detected by the ESPE or other
measures must be taken to prevent a person from bypassing, exceeding, crawling
under or crossing the ESPE undetected.
b
Observe the operating instructions for the electro-sensitive protective device that
explain how to install and use the device correctly.
b
Secure the area between the electro-sensitive protective device and the muting
sensors as follows to prevent anyone standing behind:
°
With parallel muting – between the electro-sensitive protective device and
sensors A1 / A2 as well as between the electro-sensitive protective device
and sensors B1 / B2 (
°
With sequential muting – between the electro-sensitive protective device and
sensor A2 as well as between the electro-sensitive protective device and
sensor B1 (
).
°
With cross muting – between the electro-sensitive protective equipment and
sensor A1 as well as between the electro-sensitive protective equipment and
sensor A2 (
Safety notes for the muting sensors
b
Set up muting so that it is triggered by at least two signals (e.g., from muting
sensors) that are wired independently of one another and it is not fully dependent
on software signals (e.g., from a PLC).
b
Arrange the muting sensors so that if an intervention in the protective field occurs,
the hazardous area can only be reached once the dangerous state has been
eliminated. A condition for this is that the necessary minimum distances between
the ESPE and the hazardous area are maintained, typically in accordance with
EN ISO 13855.
b
Arrange the muting sensors so that material can pass unhindered but so no one
can enter the hazardous area by fulfilling the muting conditions themselves (i.e.,
by activating both muting sensors and thereby meeting the muting requirements).
Figure 7: Safety requirements when mounting the muting sensors
1
It must not be possible to activate sensors that are located opposite one another at
the same time.
PROJECT PLANNING
4
8024589/2020-11-10 | SICK
O P E R A T I N G I N S T R U C T I O N S | Flexi Compact
19
Subject to change without notice
