EBS852 / EBS862
ELECTRONIC UNIT | OI/EBS852/EBS862/EX-EN REV. B
21
Please observe the following information when installing the
cable set:
• The specific regulations governing the installation of
electric systems in potentially explosive atmospheres
must be observed during electric installation work. The
provisions in accordance with EN 60079-14 must be
observed, particularly in respect of installing the shield
bonding and potential equalization between the actuator,
electronic unit, and motor protection equipment, see
Connection of cable shielding
on page 29.
• The motor and position sensor may only be connected
using IP 66 Ex cable glands in accordance with EN 60079
ff with EU type examination certificate in accordance
with Directive 2014/34/EU.
• Use a cable lug or a solid wire, bended to a ‘U’, to connect
the motor cable
• Make sure that sufficient strain relief measures are in
place for all cable connections.
• Protect all cables in the connection chambers sufficiently
against contact with metal components. Guarantee a gap
of at least 6 mm (0.24 in) between all conductive
components.
• Remove the desiccant in the connection chamber of the
motor and position sensor.
• Do not change the factory-set installation position of the
motor junction box.
• Close off any cable entries that are not required using
ATEX-certified IP 66 sealing plugs.
Potential equalization
In order to avoid the risk of an electric shock, it must not be
possible to come into contact with dangerous live parts and
conductive parts that can be touched should not become
dangerous live parts either under standard conditions or under
conditions when a single fault occurs.
The actual current flowing in the event of a fault is obtained
from the phase to ground voltage and the total impedance
present in the fault circuit.
For long cables, the voltage drop may be dangerous to come
into contact with high current flowing.
Preferably, the electronic unit and the actuator must be
connected with low resistance (ground resistance < 0.1
Ω
) to the
potential equalization.
In the process, the respective standards of the VDE 100 series
must be observed.
Scenario 1
If the PE of the actuator is done only via the PE conductor of the
motor cable, the maximum permissible cable lengths for the
electronic units EAS822 and EBS852 are reduced in accordance
with the following table.
The maximum permissible shutdown time of 200 ms in case of a
fault is complied with in the process.
Max. cable length
Conductor cross-section
EBS852
EBS862
1.5 mm
2
(16 AWG)
176 m (577 ft)
48 m (157 ft)
2.5 mm
2
(14 AWG)
235 m (771 ft)
79 m (259 ft)
4 mm
2
(12 AWG)
460 m (1509ft)
127 m (416 ft)
6 mm
2
(10 AWG)
–
190 m (623 ft)
Scenario 2
By laying an extra potential equalization conductor between the
electronic unit and the actuator, with a small conductor cross-
section of the motor cable (e.g. 1.5 mm
2
), the maximum
permissible cable length can be increased.
The ground resistance of the potential equalization conductor
must be < 0.1
Ω
.
The maximum permissible shutdown time of 200 ms in case of a
fault is complied with in the process.
Max. cable length
Conductor cross-section
EBS852
EBS862
4 mm
2
(12 AWG)
460 m (1509ft)
127 m (416 ft)
6 mm
2
(10 AWG)
460 m (1509ft)
190 m (623 ft)
10 mm2 (8 AWG)
460 m (1509ft)
317 m (1040 ft)
Scenario 3
If the cable lengths specified in
Actuator assignment and
maximum cable lengths
on page 22 are fully utilized, an
additional protective potential equalization must be connected.
To do this, the electronic unit and the actuator must be
connected via a short cable with a minimum cross-section of
4 mm
2
(12 AWG) to the on-site potential equalization.
The installation regulations for setting up grounding systems
must be observed and followed.
Change from two to one column
