
Safety Information and Precautions
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Safety Information and Precautions
This User Guide is packaged together with the IS620N Servo Drive. It contains basic information for quick
start of the drive. For safety and more information, please refer to the IS620N Advanced User Guide, which
can be downloaded on the website http://www.inovance.cn.
■Electrical Safety
Extreme care must be taken at all times when working with the Servo Drive or within the area of the Servo
Drive. The voltages used in the Servo Drive can cause severe electrical shock or burns and is potentially
lethal. Only authorized and qualied personnel should be allowed to work on Servo Drives.
■Machine/System Design and Safety of Personnel
Machine/system design, installation, commissioning startups and maintenance must be carried out by
personnel who have the necessary training and experience. They must read this safety information and the
contents of this manual. If incorrectly installed, the Servo Drive may present a safety hazard.
The Servo Drive uses high voltages and currents (including DC), carries a high level of stored electrical
energy in the DC bus capacitors even after power OFF. These high voltages are potentially lethal.
The Servo Drive is NOT intended to be used for safety related applications/functions. The electronic “STOP
& START” control circuits in the Servo Drive must not be relied upon for the safety of personnel. Such control
circuits isolates mains power voltages from the output of the Servo Drive. The mains power supply must be
disconnected by an electrical safety isolation device before accessing the internal parts of the Servo Drive.
Safety risk assessments of the machine or process system which uses a Servo Drive must be undertaken by
the user and or by their systems integrator/designer. In particular the safety assessment/design must take into
consideration the consequences of the Servo Drive failing or tripping out during normal operation and whether
this leads to a safe stop position without damaging machine, adjacent equipment and machine operators/
users. This responsibility lies with the user or their machine/process system integrator.
System integrator/designer must ensure the complete system is safe and designed according to the relevant
safety standards. Inovance Technology and Authorized Distributors can provide recommendations related to
the Servo Drive to ensure long term safe operation.
The installer of the Servo Drive is responsible for complying with all relevant regulations for wiring, circuit
fuse protection, earthing, accident prevention and electromagnetic (EMC regulations). In particular fault
discrimination for preventing re risk and solid earthing practices must be adhered to for electrical safety (also
for good EMC practice). Within the European Union, all machinery in which this product is used must comply
with required directives.
■Electrical Installation - Safety
Electrical shock risk is always present within a Servo Drive including the output cable leading to the motor
terminals. Where dynamic brake resistors are fitted external to the Servo Drive, care must be taken with
regards to live contact with the brake resistors, terminals which are at high DC voltage and potentially lethal.
Cables from the Servo Drive to the dynamic brake resistors should be double insulated as DC voltages are
typically 600 to 700 VDC.
Mains power supply isolation switch should be tted to the Servo Drive. The mains power supply must be
disconnected via the isolation switch before any cover of the Servo Drive can be removed or before any
servicing work is undertaken stored charge in the DC bus capacitors of the PWM inverter is potentially lethal
after the AC supply has been disconnected. The AC supply must be isolated at least 10 minutes before any
work can be undertaken as the stored charge will have been discharged through the internal bleed resistor
tted across the DC bus capacitors.
Whenever possible, it is good practice to check DC bus voltage with a VDC meter before accessing the
inverter bridge. Where the Servo Drive input is connected to the mains supply with a plug and socket,
then upon disconnecting the plug and socket, be aware that the plug pins may be exposed and internally
connected to DC bus capacitors (via the internal bridge rectier in reversed bias). Wait 10 minutes to allow
stored charge in the DC bus capacitors to be dissipated by the bleed resistors before commencing work on
the Servo Drive.