4.5.1
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:
•
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.
4.5.2
Voltage supply
DANGER
Hazard due to lack of effectiveness of the protective device
In the case of non-compliance, it is possible that the dangerous state of the machine
may not be stopped or not stopped in a timely manner.
b
Make sure that the following control and electrical requirements are met so the
safety laser scanner can fulfill its protective function.
•
The power supply unit must be able to jumper a brief power failure of 20 ms as
specified in IEC 60204-1.
•
The safety laser scanner requires a supply voltage of 24 V. For details about
tolerances and further connected loads,
•
The power supply unit must provide safe isolation according to IEC 61140 (SELV/
PELV as per IEC 60204-1).
3)
•
Make sure that the safety laser scanner is provided with an appropriate electrical
fuse protection. Electrical data for calculating what fuse is required,
.
•
Use the same earthing method for all devices that are electrically connected to the
safety laser scanner.
3)
The voltage supply according to SELV has proven to be more reliable in demanding environments.
PROJECT PLANNING
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8023152/1G5N/2022-06-28 | SICK
O P E R A T I N G I N S T R U C T I O N S | outdoorScan3 Core I/O
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Subject to change without notice