8-Channel Isolated Input Module – RS485 MODBUS Data Acquisition

The 8-Channel Isolated Input Module is engineered for high accuracy and stability in demanding industrial environments. Supporting universal analog and thermocouple inputs, this module ensures precise data acquisition while providing up to 400VAC opto-coupler isolation for maximum safety and reliability.
With a slim 98.5 × 99 × 17 mm design and standard DIN35mm rail mounting, installation is fast and space-efficient. Communication is handled via RS485 with MODBUS-RTU protocol, making it configurable with a wide range of control and monitoring platforms including PLCs, DCS, HMI, SCADA, and OPC servers.

Key Features

• High accuracy, stability, and performance

• 8 isolated input channels for universal analog and thermocouple signals

• Opto-coupler relay isolation up to 400VAC

• Compact, ultra-thin design: 98.5 × 99 × 17 mm

• DIN35mm rail-mounted with pluggable terminals for easy installation

• RS485 MODBUS-RTU communication, compatible with most industrial systems

• Wide 9–36VDC power supply input

• Channel No.: 8 channels input

• Input Type: Thermocouple + Analog input

• Thermocouple Input: K, S, E, T, R, B, N, J, WRe325, WRe326

• Analog Input: 4–20mA, 0–10mA, 0–5VDC, 1–5VDC

• Analog Input Range: -999 to +9999

Performance

• Accuracy: ±0.2% (analog input), 0.2%FS ± 2.0°C (T.C input)

• Sample Rate: 1 second / 4 channels

• Channel Isolation: Opto-coupler relay isolation

• Isolation Voltage: Up to 400VAC

Output

• Output Signal: RS485 communication port, MODBUS-RTU protocol

• Baud Rate: 9600, 19200, 4800 (configurable)

Electrical

• Power Supply: 9–36VDC (24VDC rated)

• Power Consumption: <1W

Mechanical

• Case Material: ABS

• Cable Size Used: 0.5 to 2.5mm²

• Installation: DIN35mm rail mounted

• Programmer: LCD display with ABS case for setting

• Size: 98.5 × 99 × 17 mm

• IP Protection: IP20

Environmental

• Working Temperature: 0 to 50°C

• Storage Temperature: -40 to 80°C

• Working Humidity: <85% RH (non-condensing)