25821 8-channel industrial analog acquisition module - Modbus RTU Analog Input 8CH

Modbus RTU 8CH analog input

Supports four ranges (configurable):

0~5V/1~5V

0~20mA (default) /4~20mA

Modbus RTU protocol with integrated protection circuits

Modbus RTU 8CH analog input is an industrial standard analog acquisition module, supports multiple ranges and 8 channels simultaneous acquisition. Adopts Modbus RTU protocol with built-in protection circuits such as electrical isolation, magnetic isolation, resettable fuse and TVS.

Configurable device address (1~255), multiple devices can be cascaded on RS485 bus

Built-in voltage regulator, supports 7-36V wide range power supply.

Built-in one-piece power isolation, provides stable isolated voltage, does not require any additional power supply for the isolated terminal.

Built-in single-body magnetic isolation, achieves signal isolation, high reliability, strong anti-interference

Built-in resettable fuse and TVS (Transient Voltage Suppressor), effectively suppresses surges and transient voltage spikes in the circuit, provides protection against overcurrent/surge, lightning and electrostatic.

Supports 12-bit high-precision acquisition with multiple range input modes, supports single-ended/differential input, supports simultaneous acquisition of voltage and current

Adopts high-precision resistors and high-precision zero-drift operational amplifier for more accurate data acquisition

Built-in oversampling digital filtering algorithm, built-in watchdog, for stable output without crashing

Rail-mounted housing design, bracket stacking combination, easy to install and safer to use

3x LED to indicate MCU status and signal transmitting and receiving status

Industrial Grade Insulated Protection

Double isolation of on-board power and signal for RS485 communication, provides stable isolation voltage, has high reliability and strong anti-interference performance. Built-in TVS (transient voltage suppression tube) can effectively suppress overvoltage and transient peak voltage in the circuit, lightning protection and ESD protection. Built-in resettable fuse and protection diode to ensure stable current and voltage output, provides over-current and over-voltage protection, improves shockproof performance, suitable for industrial environments with high requirements.

Supports voltage/current acquisition

Wider Measuring Range

8-channel analog acquisition interfaces, voltage and current acquisition are switchable via jumper. Several Ranges Configurable Via Software

Rail Mount Bracket

Supports Standard 35mm Guide Rail, with Rail Mounting Buckle, Easy to Install.