WAVE-25821, Industrial 8-Ch Analog Acquisition Module, 12-bit High-precision, Default Current Mode 0-20mA version

Modbus RTU Analog Input 8CH (Default Current Mode 0-20mA version) is an industrial standard analog acquisition module that supports multiple ranges and 8-ch simultaneous acquisition. Adopts Modbus RTU protocol with built-in protection circuits such as power isolation, magnetical isolation, resettable fuse, and TVS.

Features:

• Configurable device address (1~255), multi-devices can be cascaded on RS485 bus
• Onboard voltage regulator, supports 7~36V wide range power supply
• Onboard unibody power supply isolation, provides stable isolated voltage, needs no extra power supply for the isolated terminal
• Onboard unibody magnetical isolation, allows signal isolation, high reliability, strong anti-interference
• Onboard resettable fuse and TVS (Transient Voltage Suppressor), effectively suppresses surge voltage and transient spike voltage in the circuit, provides over-current/over-voltage proof, lightningproof & anti-electrostatic
• Supports 12-bit high-precision acquisition with multiple range input modes, supports single-ended/differential input, supports voltage and current simultaneous acquisition
• Adopts high-precision resistors and zero-drift high-precision operational amplifier for more accurate data acquisition
• Built-in oversampling digital filtering algorithm, onboard watchdog, for stable output without crashing
• Rail-mount case design, support stacking combination, easy to install and safer to use
• 3x LEDs for indicating the MCU status and signal transceiving status

Specifications: 

Communication Interface: RS485

Baud Rate: 4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000

Default Communication Format: 9600, N, 8, 1

Modbus Protocol: Standard Modbus RTU Protocol

Power Supply: DC 7~36V

Sampling Accuracy: 12-bit resolution, accuracy ≤ 3%

Data Update Rate: 25Hz

Input Mode: supports single-ended/differential input, supports voltage and current simultaneous acquisition

Default Mode: 8-ch current mode, 0~20mA

Range: 0~5V / 1~5V, 0~20mA / 4~20mA

Current Sampling Resistor: 249Ω

Interface:

Red: 7-36V DC Power Supply

Blue: Analog Input

Green: RS485 Interface

Modbus RTU Analog Input 8CH Configurable Range

Rail-Mount Support

Supports 35mm Standard Guide Rail, With Rail-Mount Buckle, Easy To Install

Dimensions:

Wiki: https://www.waveshare.com/wiki/Modbus_RTU_Analog_Input_8CH