6Unidrive M400 Control Quick Start Guide
Issue Number: 3
1.6.7 SELV terminals
SELV terminals can be safely connected to other SELV equipment and further protection against
human contact is not required.
If an ELV terminal is connected directly to a SELV circuit (on the drive or other equipment), the
combined circuit is ELV.
For this reason, ELV terminals should not be connected to SELV circuits unless it is acceptable to
compromise the SELV circuit.
1.6.8 Products connected by plug and socket
An electric shock hazard exists if mains-supplied equipment is supplied via a plug and socket. When
unplugged, the pins of the plug may carry a potentially lethal voltage until the internal capacitors have
discharged. This can take up to 10 minutes.
It is recommended that a shrouded plug is used that prevents contact with the pins.
1.7 Setting up, commissioning and maintenance
1.7.1 Lifting and handling
Some items of equipment weigh in excess of 15 kg (33 lb). Use appropriate safeguards when lifting
these models. A full list of weights can be found in the installation instructions.
1.7.2 Output circuit and motor protection
Control parameters that are related to motor overload and protection must be set correctly to avoid a
risk of overheating and fire in the event of motor overload. In some applications motor temperature
protection may also be required.
1.7.3 STOP, Enable and Safe Torque Off functions (where applicable)
These functions do not remove dangerous voltages from the equipment or any external option unit,
nor do they isolate the motor from dangerous voltages.
Automatic start
Some parameter settings may cause the motor to start unexpectedly.
Restore default parameter set
Depending on the application, this may cause unpredictable or hazardous operation.
1.8 Safety of machinery, safety-critical applications
Within the European Union all machinery in which this product is used must comply with Machinery
Directive 2006/42/EC.
The design of safety-related control systems must only be done by personnel with the required
training and experience. The Safe Torque Off function will only ensure the safety of a machine if it is
correctly incorporated into a complete safety system. The system must be subject to a risk
assessment to confirm that the residual risk of an unsafe event is at an acceptable level for the
application.
It is essential that changes to the settings are given careful consideration. Depending on
the application, a change could have an impact on safety. Appropriate precautions must
be taken against inadvertent changes or tampering. Some specific settings which require
particular care are listed below. This is not an exclusive list. Other settings may have an
impact on safety in specific applications.
