Nx Networks NX series User Manual
Page 7
Safety
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1. SAFETY
1.1 Warnings
1
The components of the power unit of the frequency converter are live
when the NX is connected to mains potential. Contact with this voltage
is extremely dangerous and may cause death or severe injury. The
control unit is isolated from the potential.
2
The motor terminals U, V, W and the DC-link/brake resistor terminals –/+
are live when the NX is connected to mains, even if the motor is not
running.
3
The control I/O-terminals are isolated from the mains potential. However,
the relay outputs and other I/O-terminals may have a dangerous control
voltage present even when the NX is disconnected from mains.
4
The frequency converter has a large capacitive leakage current.
5
If the frequency converter is used as a part of a machine, the machine
manufacturer is responsible for providing the machine with a main switch
(EN 60204-1).
6
Only spare parts delivered by Honeywell can be used.
1.2 Safety
instructions
1
The NX frequency converter is meant for fixed installations only.
2
Do not perform any measurements when the frequency converter is
connected to the mains.
3
After disconnecting the frequency converter from the mains, wait until the
fan stops and the indicators on the keypad extinguish. (if no keypad is
attached see the indicators on the cover). Wait 5 more minutes before
doing any work on the NX connections. Do not even open the cover
before this time has expired.
4
Do not perform any voltage withstand tests on any part of the NX. There
is a defined procedure for making this test. Ignoring this procedure may
result in damage to the frequency converter.
5
Prior to measurements on the motor or the motor cable, disconnect the
motor cable from the frequency converter.
6
Do not touch the IC-circuits on the circuit boards. Static voltage discharge
may damage the components.
7
Before connecting the frequency converter to mains, ensure that the
frequency converter front and cable covers are closed.
ONLY A COMPETENT ELECTRICIAN SHOULD CARRY OUT
THE ELECTRICAL INSTALLATION
WARNING