V&T Technologies Co., Ltd.
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Chapter 3 Wiring of Inverter
21
3.8 Functions of Control Circuit Terminals
Type
Terminal
symbol
Terminal function
description
Technical specification
Operation
panel 485
CN7
485 port of operation panel
Rate: 38400bps
Up to 32 sets of equipment can be paralleled. Relay
shall be used if the number exceeds 32.
The maximum distance is 15m for the communication
connection of operation panel
(adopt standard twisted non
−
shielding network cable)
Digital input
+24V
+24V
24V±10%, internal isolated with GND
Maximum load: 200mA, with overload and short circuit
protection
PLC
Common end of
multi
−
functional input terminal
Short circuited with +24V upon delivery
X1~X4
Multi
−
functional input
terminals 1 ~ 4
Input specification: 24VDC,5mA
Frequency range: 0~200Hz
Voltage range: 24V±20%
COM
+24V grounding
Internal isolated with GND
Digital output
Y1
Open collector output
Voltage range: 24V±20%, maximum input current: 50mA
COM
Open collector output
common end
Internal isolated with GND
Analog input
+10V
Analog input reference
voltage
10V ±3%, internal isolated with COM
Maximum output current: 10mA, with short circuit and
overload protection
AI1
Analog input channel 1
0~20mA: Input impedance 500
Ω, maximum input
current: 30mA
0~10V: Input impedance 20k
Ω, maximum input
voltage : 15V
Resolution: 12 bits (0.025%)
0~20mA or 0~10V analog input can be selected
through jumper
AI2
Analog input channel 2
Same as AI1
GND
Analog grounding
Internal isolated with COM
Analog
output
AO1
Analog output 1
0~20mA: allowable output impedance 200~500
Ω
0~10V: allowable output impedance
≥10kΩ
Output precision: 2%, resolution: 10 bits (0.1%)
with short circuit protection function
0~20mA or 0~10V analog output can be selected
through jumper
AO2
Analog output 2
Same as AO1
GND
Analog grounding
Internal isolated with COM
Relay output
RA/RB/RC
Relay output
RA
−
RB: Normally closed
RA
−
RC: Normally open
Contact capacity: 250VAC/1A, 30VDC/1A
Note:
﹡
If the user connects adjustable potentiometer b10V and GND, the resistance of the
potentiometer shall be no less than 5
kΩ,