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euronormdrives.com
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NEURN030000_220_A
NEURN030000_220_A
11.2 Control Cable
All analog control cables and cables for the frequency input must be shielded. Analog signal cable double-shielded twisted
pair cable as shown in Figure 1. Each signal uses one pair individually shielded twisted pair cable pair. Do not use the
different analog signal with a ground wire.
Plurality of double-shielded twisted pair cable
plurality of single-shielded twisted pair cable
Diagram
1
Diagram
2
For low-voltage digital signals, double-shielded cable is the best choice, but can also be a single-shielded or unshielded
twisted pair, as shown in Figure 2, however, the frequency of the signal, it can only use a shielded cable.
Relay cable need to use cables with metal braid shield.
Need to use a network cable to connect the keyboard, for electromagnetic environment is more complex place, it is
recommended to use shielded cable.
Note:
Analog and digital signals using different cables routed separately.
11.3 Interference Counte
Connect noise filter on the output side of inverter can reduce inductive interference and radio interference .
-> Inductive interference :The electromagnetic induction makes the signal line noise when upload signal ,and then cause
the control equipment malfunction.
-> Wireless interference :The high-frequency electromagnet wave emitted by the inverter and cables will interfere with the
nearby wireless device and make it noise when receiving signal.
-> Installation of noise filter as below:
M
MCCB
Inverter
PI500
Noise
Filter
Radio Set
Conduction
interference
Control
equipment
The signal line
AC input
(1) Inductive interference countermeasure : in addition to the installation of noise filter , it can also import the output
cables to grounded metal tube. The distance between the output cable and signal line is greater than 30cm, the influence
of inductive interference is also significantly reduced. As shown below:
MCCB
Inverter
PI500
Metal tube
30cm Above
The signal line
Control
equipment
M
AC input
Radio frequency (RF) interference countermeasure : The input cables, output cables and inverter itself can produce
interference , to install noise filter on both sides of input and output and shield the inverter with metal box can reduce the
radio frequency interference . As shown below:
AC input
MCCB
PI500
Inverter
Noise
Filter
Noise
Filter
Iron box
Iron box
Metal tube
M
