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7.7.3 Connecting the power supply
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 earthing conductors at all
electric devices are firmly connected according to the connection diagram.
Explosion hazard due to lack of equipotential bonding!
Electrostatic processes, an incorrect earthing 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 earthing 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!
A wrongly dimensioned fuse protection may lead to overheating during operation
and thus cause an explosion!
▶
A fuse appropriate for the valve solenoid's rated current (max. 3 x I
to DIN 41571 and/or IEC 60127) or a protective motor switch with short-circuit
and thermal instantaneous tripping must be connected upstream of each valve
solenoid as short-circuit protection. The shut-off threshold of this fuse must
match or exceed the short-circuit current of the supply voltage source.
▶
This fuse or protective motor switch may only be fitted outside the explosive
area or must be of an explosion-proof design.
▶
The fuse can be accommodated in the related supply unit or must be switched
separately upstream.
For information on the prescribed pre-fuse, refer to "Data sheet 22049-XN".
wARnInG
RE 22049-XN-B/05.17, M-.SED 6...XN..., Bosch Rexroth AG
Assembly
29/48
according
rated
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