Dual-Mode DA Output 485 Acquisition Module is an intelligent module integrating signal acquisition, transmission, and DA output. Dual-Mode DA Output 485 Acquisition Module features high measurement accuracy, excellent stability, a modular structure, flexible configuration, good linearity, and anti-interference capability, and supports Modbus RTU communication.

Features

Supports input of 24 types of common industrial standard signals;

Supports Modbus RTU communication;

Offers multiple transmission output modes, with 4 channels available for output;

Three-terminal isolation for signal input, power supply, and transmission output, with an isolation voltage of 2000V AC;

Compact size for easy installation, compatible with standard 35mm DIN rail mounting;

01/

Input

K-type thermocouple; S-type thermocouple;
R-type thermocouple; T-type thermocouple;
E-type thermocouple; J-type thermocouple;
B-type thermocouple; N-type thermocouple;
WRe3-WRe25 thermocouple; WRe5-WRe26 thermocouple; 4～20mA current signal;
0～20mA current signal; Cu50 copper resistor;
PT100 platinum resistor; 0～80Ω resistance signal;
0～400Ω resistance signal; 0～20mV voltage signal;
0～100mV voltage signal; 0～1V voltage signal;
1～5V voltage signal; 0～5V voltage signal;
-20～+20mV voltage signal; -100～+100mV voltage signal; -5V～+5V voltage signal

02/

Output

Channel 0: 0-5V / 0-10V / 0-20mA / 0-10mA

Channel 1: 1-5V / 4-20mA

Communication

Standard photoelectrically isolated Modbus RTU communication;

Other Detailed Parameters

Parameter Category	Specification Details
Comprehensive Measurement Accuracy	0.001FS ± 1 digit
AD Accuracy	22 bits
AD Speed 13	SPS (Samples Per Second)
Transmission Accuracy	16 bits
DA Speed 10M SPS	(Mega Samples Per Second)
Communication Protocol	Modbus RTU
Output Impedance	≤350Ω (for current output); ≥500KΩ (for voltage output)
Isolation Voltage	2000V AC (between input, output, and power supply, tested for 1 minute)
Temperature Drift	50ppm (parts per million)
Electromagnetic Compatibility (EMC)	GB/T 18268 (equivalent to IEC 61326-1)
Ambient Temperature	0～50℃
Relative Humidity	≤85% RH (avoid exposure to highly corrosive gases)
Power Supply	DC24V (±0.1V) / AC220V
Power Consumption	≈5W
Overall Dimensions Width × Height × Depth	45 × 100 × 115mm
Mounting Structure	35mm DIN rail mounting

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