Features at a glance
Modbus RTU Analog Input 8CH is an industrial standard analog acquisition module, 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.
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Configurable device address (1~255), multi devices can be cascaded on RS485 bus
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Onboard voltage regulator, supports 7~36V wide range power supply
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Onboard unibody power supply isolation, provides stable isolated voltage, needs no extra power supply for the isolated terminal
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Onboard unibody magnetical isolation, allows signal isolation, high reliability, strong anti-interference
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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
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Supports 12-bit high-precision acquisition with multiple range input modes, supports single-ended/differential input, supports voltage and current simultaneous acquisition
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Adopts high-precision resistors and zero-drift high-precision operational amplifier for more accurate data acquisition
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Built-in oversampling digital filtering algorithm, onboard watchdog, for stable output without crashing
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Rail-mount case design, support stacking combination, easy to install and safer to use
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3x LEDs for indicating the MCU status and signal transceiving status
Specifications
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Model
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Modbus RTU Analog Input 8CH
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Modbus RTU Analog Input 8CH (B)
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Communication interface
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RS485
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Baud rate
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4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000
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Default communication format
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9600, N, 8, 1
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Modbus protocol
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Standard Modbus RTU protocol
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Power supply
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DC 7~36V
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Sampling accuracy
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12-bit resolution, accuracy ≤3%
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Data update rate
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25Hz
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Input mode
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supports single-ended/differential input, supports voltage and current simultaneous acquisition
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Default mode
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8-ch current mode, 0~20mA
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8-ch voltage mode, 0~10V
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Range
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0~5V/1~5V
0~20mA/4~20mA
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0~10V/2~10V
0~20mA/4~20mA
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current Sampling resistor
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249Ω
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499Ω
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Primary function
Supports sending Modbus RTU protocol commands via RS485 to acquire data from 0~20mA/0~10V sensor
Industrial Grade Isolated Protection
Onboard power and signal dual isolation for RS485 communication, provides stable isolation voltage, features high reliability and strong anti-interference performance. Built-in TVS (transient voltage suppression tube) can effectively suppress the surge voltage and transient peak voltage in the circuit, lightningproof & ESD protection. Built-in resettable fuse and protection diode to ensure stable current and voltage output, provides over-current and over-voltage proof, improves shock-proof performance, suitable for the industrial environments with high requirement.
Supports voltage/current acquisition - Wider Measurement range
8-ch analog acquisition interfaces, voltage and current acquisition is switchable via jumper. Multiple Ranges Configurable via Software
Interface introduction
Connection Diagram
Supports setting device address (1~255) for Multi-Device Cascading, supports single-ended/differential input, supports voltage and current simultaneous acquisition
Wide voltage power supply, isolated RS485 interface
Built-in fuse and anti-reverse protection, with ESD protection for analog input
Rail-Mount Support
Supports 35mm standard guide rail, with rail-mount buckle, easy to install.
Supports stacking installation
Dimensions
