SICK CLV69x User Manual

■
Connection work only in the temperature range: 0 °C ... +50 °C
■
Only operate in idle state (no mounting or connection work).
6.2 Prerequisites for the safe operation of the device in a system
WARNING
Risk of injury and damage caused by electrical current!
As a result of equipotential bonding currents between the device and other grounded
devices in the system, faulty grounding of the device can give rise to the following dan‐
gers and faults:
■
Metal housings are vulnerable to dangerous currents.
■
Devices will behave incorrectly or be destroyed.
■
Cable shielding will be damaged by overheating and cause cable fires.
Remedial measures
b
Only skilled electricians should be permitted to carry out work on the electrical sys‐
tem.
b
Ensure that the ground potential is the same at all grounding points.
b
If the cable insulation is damaged, disconnect the voltage supply immediately and
have the damage repaired.
b
Where local conditions are unfavorable and thus do not meet conditions for a safe
earthing method (same ground potential at all grounding points), take measures in
accordance with the following formats.
The device is designed and tested for electrical safety in accordance with EN 60950-1.
It is connected to the peripheral devices (power supply, any local reading pulse sen‐
sor(s), PLC) via shielded cables. The cable shield – for the data cable, for example –
rests against the metal housing of the device. The device can either be grounded
through the cable shield or through one of the threaded mounting holes.
If the peripheral devices have metal housings and if the cable shields also lie on their
housings, it is assumed that all devices involved in the installation have the same
ground potential.
This is achieved by complying with the following conditions:
■
Mounting the devices on conductive metal surfaces
■
Correct grounding of the devices/metal surfaces in the system.
■
If necessary: low-impedance and current-carrying equipotential bonding between
areas with different ground potentials
SICK
device
closed current loop with equalizing
currents via cable shield
grounding point 2
grounding point 1
grounding potential difference
e. g. PLC
e. g. sensor
I
U
= metal housing
= shielded electrical cable
Figure 20: Occurrence of equipotential bonding currents in the system configuration
ELECTRICAL INSTALLATION
6
8014396/ZMG8/2017-07-04 | SICK O P E R A T I N G I N S T R U C T I O N S | CLV69x
33
Subject to change without notice

SICK CLV69x Specifications

General

Brand	SICK
Model	CLV69x
Category	Barcode Reader
Language	English