DANGER
Hazard due to lack of effectiveness of the protective device
The dangerous state may not be stopped in the event of non-compliance.
If a protective field is interrupted, the safety output switches to the OFF state for at
least 80 ms, even if the interruption is shorter than that time. With a safety output
via network, it can happen that the controller does not detect the OFF state in the
event of a very short protective field interruption, e.g. if the network time expectation is
configured to be greater than 80 ms.
14)
The internal restart interlock of the safety laser scanner must be used to end the
dangerous state.
b
If the network time expectation is longer than 80 ms, use the internal restart
interlock of the safety laser scanner.
The safety laser scanner complies with the regulations for electromagnetic compatibility
(EMC) for the industrial sector (Radio Safety Class A).
4.4.1
Electromagnetic compatibility
Overview
Safety components switch all safety outputs to the OFF state in the event of errors in
order to rule out potentially dangerous situations. For example, faulty data transmission
must lead to a shutdown for safety-related devices, even if it can be tolerated for
non-safety-related devices.
To avoid electromagnetic interference as much as possible, a uniform grounding con‐
cept is required for the entire system. In particular, the functional earth must be
connected using suitable conductors.
Electromagnetic interference depends on the environment in which the product is used.
The product is tested and certified according to common standards. It is therefore
reliable when used in industrial environments.
Shielded cables
When using shielded cables, the shielding should be applied on both sides. Deviations
are only permitted in exceptional and justified cases. Especially when using motors or
other inductive consumers, one-sided support of the shielding is not sufficient because
it does not act against inductive interferers.
Functional earth
The functional earth must be connected. The connection must be made in accordance
with the earthing method of the system.
Options for connecting the functional earth:
•
Alternative FE connection
•
Pin or thread on M12 plug connector
•
M5 threaded holes on the rear or side of the housing
The functional earth must be connected with low inductance, i.e. with a sufficient wire
cross-section and the shortest possible length of cable.
The alternative FE connection allows a large wire cross-section, e.g., when using a
grounding strap.
14)
The network expectation time is sometimes referred to as the connection reaction time limit.
PROJECT PLANNING
4
8025424/1ELL/2022-01-21 | SICK
O P E R A T I N G I N S T R U C T I O N S | microScan3 Pro I/O
63
Subject to change without notice
