B
、Multi-function input terminal
C
、OC output terminal
Controller
NPN type
（
）
Inverter
19
A
、Analog input terminal
COM
COM
24V
n
、
FW D
、
X
REV RST
、
5V
5V
Fig. 3-4
Fig. 3-5
EH600
EH600
Chapter 3 Mechanical and Electrical Installation
3) Description of connection of control terminals :
Since the weak analog voltage signal is easy to suffer external interferences ,
it needs to employ
generally
The corresponding function is valid by short
connected input terminal to COM or controller of
NPN type common emitter output . See the right
diagram for the wiring mode , in which the source
supplied by internal 24v source of the inverter .
shielded cable is used in wiring generally , and
the distance between wires should be
short
as
as possible ,no longer than 20m .
When the digital output terminal needs to drive the relay ,absorption diode should be installed at the
Note : The absorption diode must be installed with correct polarity ,otherwise it may damage DC 24
power supply easily .
1
Harmonic Effect
、
1) Higher harmonics of power supply may damage the inverter . Thus ,at some places where mains
2) As there is higher harmonics on the output side of the inverter , the capacitors and surge suppressor
which are used to improve the power may cause electrical oscillation , then the equipment would be damaged .
Therefore , capacitor and surge suppressor can not be installed on the output side .
quality is rather poor , it it recommended to install AC input reactor .
two sides of the relay coil . otherwise it may damage dc 24 power supply easily .
shielded cable and the length should be no longer than 20m ,as shown in Fig.3-4 . In case the
analog signal is subject to severe interference , and analog signal source side should be installed with
filter capacitor or ferrite magnectic core , as shown in fig.3-5 .
Less than 20m
External Analog
Source
Ferrite Magnetic Ring
Cross in the Same Direction
o r
W i n d
2
t o
3
Coils in the Same Direction
Potentiometer
6、Solution to the EMC Matter
