Electrical Connections; Safety Instructions; General - ABB EBN861 Operating Instruction

18 EBN853 / EBN861 ELECTRONIC UNIT | OI/EBN853/EBN861/EX-EN REV. C

7 Electrical connections

Safety instructions

WARNING
Risk of injury due to live parts!
When the housing is open, contact protection is not provided
and EMC protection is limited.
• Before opening the housing, switch off the power supply.
WARNING
Danger due to electric current!
Danger of electric shock by residual voltage at the terminals
after switching off the power supply.
• Before opening the terminal compartment, switch off the
power supply and wait for > 2 minutes.
NOTICE
Damage to the device due to improper handling!
• When replacing the defective safety fuses, only fuses with
types and characteristics should be used (see Fuses on
page 40).
The electrical connection may only be established by authorized
specialist personnel.
Notices on electrical connection in this instruction must be
observed; otherwise, electric safety and the IP-rating may be
adversely affected.
Safe isolation of electric circuits which are dangerous if touched
is only guaranteed when the connected devices fulfill the
requirements of EN 61140 (basic requirements for secure
separation).
To ensure safe isolation, install supply lines so that they are
separate from electrical circuits which are dangerous if touched,
or implement additional isolation measures for them.

General

Each actuator requires a suited Contrac electronic unit with
installed actuator-specific software. Observe the information in
the operating instruction. The specifications on the name plates
of the electronic unit and actuator must match to guarantee
correct hardware and software allocation.
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 30.
• 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.