ET1020 is an analog IO expansion module, including 4 channels of 4- 20mA analog input and output. The module supports the MODBUS RTU protocol, supports cascading, non-inductively expands the number of IO interfaces, and does not require configuration, plug and play, adaptive master-slave station, adaptive register address, has a communication delay of milliseconds, and high-speed communication without packet loss or abnormality. Hardware indicators present communication status in real time and other features. It can be used with the main device ET3410 for better results.
RS485
Number of ports
1 way
Operating mode
Slave
Support baud rate
115200/9600/4800/2400
AO
Number of ports
4 way
Output type
4-20mAoutput
Sampling accuracy
12bit
AI
Number of ports
4 way
Input type
4-20mAenter
Sampling Accuracy
12bit
Electrical Parameters
Rated voltage
DC12V, working range DC12~24V
Rated power
<1W
Power protection
Anti-static, anti-surge, anti-reverse connection
Environmental Parameters
Operating temperature
-40~80℃
Storage temperature
-40~85℃
Environment humidity
10-90% RH (non-condensing)
Mechanical Parameters
Size
80*71*63mm
Weight
150g
Material
ABS
Serial number
Name
Meaning
Serial number
Name
Meaning
1
Pow
Power indicator light, always on
18
GND
AI signal input ground
2
work
Working indicator light, 1 second strobe
19
AI4
AI4signal input
3
Net
reserve
20
GND
AI signal input ground
4
Recv
reserve
21
RST
reset button
5
send
reserve
22
AO1
AO1signal output
6
--
reserve
23
GND
AO Signal output
7
alarm
Alarm indicator light, always on after cascaded device communication abnormal
24
AO2
AO2 signal output
8
link
Connection indicator, always on after cascaded device plugged in
25
GND
AO Signal output
9
Vin
Power input positive stage
26
AO3
AO 3signal output
10
GND
Power input negative
27
GND
AO Signal output
11
485A
RS485-A
28
AO4
AO 4signal output
12
485B
RS485-B
29
GND
AO Signal output
13
AI1
AI1 signal input
30
Dial code
1-5 means the MODBUS communication address, restart to take effect
