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ON SAFETY
2
15
8020776/12AX / 2019-05-31|SICK
Subject to change without notice
O P E R A T I N G I N S T R U C T I O N S |Free Flow Profiler
Electrical current
DANGER
Risk of injury and damage caused by electrical current
Improper handling of live devices may lead to severe personal injury or death by electric
shock!
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Electrical installation and maintenance work must always be carried out by personnel
authorized to do so.
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Be sure to disconnect the voltage supply before attaching or detaching any electrical
connections.
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Select and implement wire cross-sections and their correct fuse protection in accordance
with the applicable standards.
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Do not touch any live parts.
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In the event of danger, immediately disconnect the profiling system from the power
supply.
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Always use original fuses with the specified current rating.
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Report any damaged cables to the maintenance team without delay.
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Observe the current safety regulations when working on electrical systems.
DANGER
Damaging potential equalization currents due to different ground potentials
The profiling system has been designed and tested for electrical safety according to
EN 60 950L1 (2006L04) and EN 60 950L1 / A11 (2009L03).
The profiling system is connected to the peripheral devices (voltage supply, PLC/host,
any other sensors, etc.) via shielded cables. The shield of each cable is connected to the
metal housing of the corresponding system components via the system plug.
If the peripheral devices have metal housings and if the cable shields are also connected
to these housings, it is assumed that all devices involved in the system have the same
ground potential.
This is achieved by fulfilling the following conditions, for example:
•
Mounting the devices on conductive metal surfaces.
•
Correctly grounding the devices and metal surfaces in the system.
•
Low-impedance and current-carrying equipotential bonding between areas with
different ground potentials, if necessary.
If these conditions are not met, e.g., on devices in a widely distributed system spanning
several buildings, different ground potentials may cause potential equalization currents to
flow along the cable shields between the devices, thereby creating hazards.
DANGER
Risk of injury and damage caused by potential equalization currents
Potential equalization currents between the profiling system and the peripheral devices
can have the following effects:
•
Dangerous voltages on the metal housing, e.g., of the 2D LiDAR sensors
•
Incorrect functioning of or irreparable damage to the devices
•
Damage/irreparable damage to the cable shields due to heating and cable fires.