Bosch Rexroth H-4WEH...XE Series - Page 29

Assembly 29/52
RE24751-XE-B/10.19, H-4WEH...XE..., BoschRexrothAG
7.7.3 Establishing the electrical connection
WARNING
High electrical voltage!
Danger to life, risk of injury caused by electric shock due to incorrect connection
and faulty pin assignment.
▶ The valve may only be connected by or under the supervision of a specialized
electrician.
▶ De-energize the system before the assembly, pulling and connecting plug-in
connectors and all other installation works. Secure the electrical equipment
against restarting.
▶ Provide for proper, safe PE connection.
▶ Check before switch-on whether the protective grounding conductors at all
electric devices are firmly connected accordingto the connection diagram.
▶ After connection, re-attach the cover so that it cannot be lost.
Explosion hazard due to lack of equipotential bonding!
Electrostatic processes, an incorrect grounding concept or a lack of equipotential
bonding may lead to an explosion. Apart from this, malfunctions or uncontrolled
movements at the machine may be caused!
▶ Provide for correct grounding and provide for proper equipotential bonding.
▶ The base plate or subplate on which the valve is fitted must be electrically
conductive and included in the equipotential bonding accordingto EN60079-14
and IEC60364-4-41.
Explosion hazard caused by overheating!
An incorrectly dimensioned fuse protection may lead to overheating and thus cause
an explosion!
▶ A fuse which corresponds to the rated current accordingto DIN41571
and EN/IEC60127 has to be connected upstream of every valve solenoid
(max.3xI
rated
). The shut-off threshold of the fuse has to match the prospective
short-circuit current of the supply source.
▶ The prospective short-circuit current of the supply source may amount to
amaximum of 1500A.
▶ This fuse may only be installed outside the potentially explosive atmospheres
ormust be of an explosion-proof design.
Explosion hazard caused by improper assembly!
No precautions are taken for safe connection of the shielding or sheathing in the
terminal box of the valve solenoid and on the cable and line entry. The use of
connection lines with shielding or sheathing can lead to potential backfeeding and
is thus an explosion hazard!
▶ Only use connection lines without shielding or sheathing.
For information on the prescribed pre-fuse, refer to "Datasheet24751-XE".