DANGER
H
azard 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.
►
Make sure that the following control and electrical requirements are met so the
safety laser scanner can fulfill its protective function.
•
It mus
t be possible to electrically influence the control of the machine.
•
Use the same earthing method for all devices that are electrically connected to the
safety laser scanner.
•
All earthing points must be connected with the same ground potential.
•
Voltage must be supplied in accordance with SELV/PELV (IEC60204-1) for all
devices that are electrically connected to the safety laser scanner.
•
The control that is connected and all devices responsible for safety must com‐
ply with the required performance level and the required category (for example
according to ISO13849-1).
The safety laser scanner complies with the regulations for electromagnetic compatibility
(EMC) f
or 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 consistent earthing
method is required for the entire system. In particular, the functional earth must be
connected using suitable conductors. Cables susceptible to interference and sources of
interference should be routed separately.
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
F
or shielded cables, the shielding should be applied on both sides and over a large
area. 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
T
he 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.
PROJECT PLANNING 4
8025220/1L9Q/2023-08-14 | SICK O P E R A T I N G I N S T R U C T I O N S | microScan3 – EtherCAT®
61
Subject to change without notice
To Next Page
Loading...
Need help?
General
