Siemens MICROMASTER 420 Operating Manual page 2

Warnings, Cautions and Notes
Warnings, Cautions and Notes
The following Warnings, Cautions and Notes are provided for your safety and as a
means of preventing damage to the product or components in the machines
connected.
Specific Warnings, Cautions and Notes that apply to particular activities are
listed at the beginning of the relevant chapters and are repeated or supplemented
at critical points throughout these chapters.
Please read the information carefully, since it is provided for your personal safety
and will also help prolong the service life of your MICROMASTER 420 Inverter and
the equipment you connect to it.
WARNING
!
This equipment contains dangerous voltages and controls potentially
dangerous rotating mechanical parts. Non-compliance with Warnings or failure
to follow the instructions contained in this manual can result in loss of life,
severe personal injury or serious damage to property.
Only suitable qualified personnel should work on this equipment, and only after
becoming familiar with all safety notices, installation, operation and
maintenance procedures contained in this manual. The successful and safe
operation of this equipment is dependent upon its proper handling, installation,
operation and maintenance.
The DC link of all MICROMASTER modules remains at a hazardous voltage
level for 5 minutes after all voltages have been disconnected. Therefore always
wait for 5 minutes after disconnecting the inverter from the power supply before
carrying out work on any modules. The drive unit discharges itself during this
time.
This equipment is capable of providing internal motor overload protection in
accordance with UL508C section 42. Refer to P0610 (level 3) and P0335.
Motor overload protection can also be provided using an external PTC via a
digital input.
This equipment is suitable for use in a circuit capable of delivering not more
than 10,000 symmetrical amperes (rms), for a maximum voltage of 230/460 V
when protected by an H or K type fuse, a circuit breaker or self-protected
combination motor controller.
Use Class 1 60/75 °C copper wire only with the cross-sections as specified in
the Operating Instructions..
The mains input, DC and motor terminals carry dangerous voltages even if the
inverter is inoperative, wait 5 minutes to allow the unit to discharge after
switching off before carrying out any installation work.
NOTES
Before installing and commissioning, please read these safety instructions and
warnings carefully and all the warning labels attached to the equipment.
Make sure that the warning labels are kept in a legible condition and replace
missing or damaged labels.
Maximum permissible surrounding ambient temperature is 50°C.
2
Edition 04/04
MICROMASTER 420
Compact Operating Manual