High-performance 4-channel analog input module with opto-isolated RS485 communication, designed for reliable industrial data acquisition.
Technical Specifications
| Item |
Description |
| Input Range |
0~+5V, 1~+5V, 0~20mA, 4~20mA, 0-10V (custom ranges available upon request) |
| Input Mode |
4-channel differential input |
| Sampling Frequency |
AD sampling rate up to 1MHz (4-channel synchronous sampling); MODBUS communication update rate: 10Hz |
| Resolution |
12-bit |
| Accuracy Class |
±1‰ |
| Input Impedance |
20MΩ |
| Communication Interface |
Opto-isolated RS485 interface |
| Communication Protocol |
Standard Modbus-RTU (supports 8 data bits, 1 stop bit, optional parity: None/Even/Odd) |
| Baud Rate |
1200bps, 2400bps, 4800bps, 9600bps, 19200bps, 38400bps, 57600bps, 115200bps |
| Communication Distance |
RS485 communication distance < 1000m |
| Operating Voltage |
12-30VDC |
| Protection Level |
Power port polarity protection; communication port isolation voltage: 2500Vrms (500DC continuous), ±15KV ESD protection, lightning & surge protection |
| Product Stability |
Imported chips + built-in watchdog, ensuring high reliability |
| Power Consumption |
< 2000mW |
| Weight |
Approx. 0.3Kg (excluding packaging) |
| Operating Environment |
Temperature: -40℃ ~ +85℃; Humidity: 0 ~ 85%RH (non-condensing) |
| Mounting Method |
Standard 35mm U-shaped DIN rail mounting |
Operation & Connection Guide
1. Range Configuration
Open the device housing; J0-J3 jumpers (near terminals) correspond to 8 channels (IN0-IN3):
Voltage signals (0V~+5V / 1V~+5V): Keep the channel jumper Jx open.
Current signals (0~20mA / 4~20mA): Close the channel jumper Jx.
2. Analog Input Connection
Voltage Acquisition: Connect the voltage signal to INx+ and INx- terminals (differential input).
Current Acquisition: Connect the current signal to INx+ and INx- terminals (differential input).
Key Selling Points
✅ High Precision & Stability: 12-bit resolution, ±1‰ accuracy, imported chips with watchdog for industrial-grade reliability.
✅ Flexible Inputs: Supports multiple voltage/current ranges (customizable), 4-channel differential input.
✅ Robust Communication: Opto-isolated RS485 (Modbus-RTU), long-distance transmission (<1000m), multiple baud rates.
✅ Full Protection: Polarity protection, ESD/surge/lightning protection, wide operating temperature (-40℃~+85℃).
✅ Easy Installation: Standard 35mm DIN rail mounting, simple jumper configuration for range switching.
