Inverter AT1, AT2, AT3, AT4 Operating Instruction
AT1--Single-phase to three-phase
AT2--Single-phase to single-phase
AT3--Three-phase to three-phase
Inverter
AT Simple general series
High performance and low noise/
Mini AC motor driver
AT4--Single-phase to three-phase
2页
1. Main circuit terminal and function description
(1) Single-phase to three-phase （for AT1，AT4）
Charter 1 Installation and wiring
(2) Single-phase input and output (for AT2)
Terminal
label
Function description
L, N Single phase AC 220V input terminal
U, V, W
Output terminal connect to
Three
phase
(220V-AT1) (380V-AT4)AC motor
GND Grounding terminal
Terminal label
Function description
L, N Single phase AC 220V input terminal
U, V, W
Output terminal connect to Single
phase 220V AC motor
GND Grounding terminal
3页
2. Terminal description
Port
Functional
description
Instructions
15V/24V 15V/24V power output 200mA15V/24V output
X6
Input port6
(Reversing switch)
Short Port X6 and COM，input signal
effective
X5
Input port 5 (Reverse
rotation Control switch)
Short Port X5 and COM，input signal
effective
X4
Input port 4(Forward
rotation Control switch)
Short Port X4 and COM，input signal
effective
X3
Input port 3(section-
speed 3)
Short Port X3 and COM，input signal
effective
X2
Input port 2(section-
speed 2)
Short Port X2 and COM，input signal
effective
X1
Input port 1(section-
speed 1)
Short Port X1 and COM，input signal
effective
485+/485- 485 communication port
(3). Three-phase input and output (for AT3)
Terminal
label
Function description
R,S,T Three phase AC 380V input terminal
U, V, W
Output terminal connect to
Three
phase
380V AC motor
GND Grounding terminal
Section
speed input 1
Section
speed input 2
Section
speed input 3
Original
Frequency
Main Speed 1 1 1 50
Section speed 1
1 1 0 45
Section speed 2 1 0 1 40
Section speed 3 1 0 0 35
Section speed 4 0 1 1 30
Section speed 5 0 1 0 25
Section speed 6 0 0 1 20
Section speed 7 1 1 1 15
Note
：
0 means input Port connect with COM, 1 means
disconnect.
3. Multi-speed input Frequency control table ：
4页
Port
Functional
description
Instructions
COM Common GND
VL1
External
analog
voltage
input
0-5V/10V Analog voltage input
CI
External current signal
input
4-20mA Current input
SP1 Open-collector output 1
SP2 Open-collector output 2
5V/10V 5V/10V power output
supply 5V/10V 20mA power output
TC Relay output C
250VAC 5A/30VDC 3A
TA and TB Normal Close ,TA and TC
Normal Open
TB Relay output B
TA Relay output A
5页
4. Basic operation wiring diagram
(1) Single-phase input three-phase output (for AT1 )
(Three phase 220V, if 380V Star-connection method
needs to change to the 220V Delta-connection method)
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