Improper Use And Precautions - Bosch rexroth COIL D36 Technical User's Manual

6/10 COIL D36 | Safety
Bosch Rexroth AG, RE 18324-42/2023-02-17

2.2 Improper use and precautions

High voltage!
On electric coils having power supplies > 50Vac and/or 75Vdc, touching any live
part of the product can result in fatal electrocution.
▶ The coil must be connected by an expert electrician or under the supervision of
an expert electrician.
▶ Before all maintenance, repair, or installation operations, disconnect the power
supply and perform a lock-out/tag-out procedure to prevent reconnection.
▶ Ensure the connection is made correctly and safely.
▶ Use exclusively power supply units with a PELV (Protective Extra Low Voltage)
protection device. Safe interruption can be achieved, for example, by means
of isolation transformers, safe opto-isolators, or battery powered operation
without a mains connection
Electromagnetic radiation!
Because they emit electromagnetic radiation, coils may interfere with other
electronic equipment and also suff er disturbances caused by external
electromagnetic radiation, resulting in possible uncontrolled movements in the
plant.
▶ Do not exceed electromagnetic radiation limit values.
▶ Use exclusively the prescribed connecting cables.
▶ Pay attention to CEM compliant wiring.
▶ Make sure the coils are properly connected to earth.
Burns hazard!
When the coil is supplied with power it is subject to a self-heating eff ect:
temperature rise of the external parts of the device. Risk of burns if the operator
accidentally touches external parts of the device.
▶ Any use other than that described under intended use is deemed to be
nonconforming use and is therefore prohibited.
▶ Incorrect connection of the coil connector will result in failed excitation and
consequently no displacement of the moving element of the valve.
▶ If the coil is excited using an incorrect power feeding voltage, the result may be
an inappropriate valve reaction followed by possible damage.
▶ If the connector is immersed in liquid it will be damaged resulting in incorrect
operation of the coil.
▶ If the machine manufacturer has not created a protection system, we
recommend installing a fuse up-line from the coil rated at double the maximum
current value the coil is designed to withstand.
PRECAUTIONS
CAUTION