Veichi JT550 Series Manual page 34

Chapter 3 Electrical Installation
3) Wiring of Control Circuit Terminals
a) AI Terminals：Weak analog voltage signals are easily interfered, and therefore the shielded cable
must be used and the cable length must be less than 20 m, as shown in following figure.
Potentiometer
External Analog
外部模拟源
Input
b) Wiring of DI terminals
Generally, select a shielded cable that is no longer than 20 m. When active drive is adopted, it is
necessary to apply filtering in order to prevent the interference to the power supply. It is recommended
to use the contact control mode.
SINK Wiring
This is one of the most commonly used connection mode. If you use an external power supply, you must
remove the jumper bar between +24V and PLC. Anode of the external power needs to be connected to
PLC terminal, and cathode needs to be connected to COM terminal.
<20m
小于
电位器
Figure 3.18 Diagram of AI Terminals
同向穿过或
同向绕2-3匝
C
0.22uF 50V
铁氧体磁环
Ferrite Magnet Ring
Figure 3.19 Wiring of AI Terminals
+VCC
signal
信号
NPN
R
0V
External Controller
外部控制器
Figure 3.20 Wiring in SINK Mode
AT500
JT550
20
米
+10V
AI1
GND
AT500
AI1
GND
+24V
+24V
PLC
X1
6K
X5
6K
C0M
Control Board
of the Inverter
变频器控制板
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JT550 Series Inverter Manual
JT550