Industrial 8-Ch Analog Input Extender Module

Industrial 8-Channel Analog Acquisition Module

• 12-bit High Precision
• Supports Voltage and Current Acquisition
• DC 7~36V Wide Voltage
• Supports MODBUS RTU Protocol
• Multiple Isolation Protection

Features at a Glance

MODBUS RTU Analog Input 8CH is an industrial standard analog acquisition module, that supports multiple ranges and 8-channel simultaneous acquisition, with built-in protection circuits such as power isolation, magnetical isolation, resettable fuse, and TVS.

• Configurable device address (1~255), multi-devices can be cascaded on RS485 bus
• Onboard voltage regulator, supports a 7~36V wide-range power supply
• Onboard unibody power supply isolation, provides stable isolated voltage. No extra power supply is needed 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, provide over-current/over-voltage proof, lightning proof & anti-electrostatic
• Supports 12-bit high-precision acquisition with multiple range input modes, supports single-ended/differential input, supports voltage and current simultaneous acquisition
• High-precision resistors and zero-drift high-precision operational amplifiers for more accurate data acquisition
• Built-in oversampling digital filtering algorithm, and onboard watchdog, for stable output without crashing
• DIN Rail-compatible case design, support stacking combination, easy to install and safer to use
• LED indicators for indicating the MCU status and signal transceiving status

Modbus RTU Analog Input 8CH (B)
Supports four ranges (configurable):
0~10V (default)/2~10V
0~20mA /4~20mA

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, lightning proof & 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 industrial environments with high requirements.

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

Interfaces Available

Connection Diagram

Wide Voltage Power Supply and Supports RS485 Interface

Built-in fuse And Anti-Reverse Protection, With ESD Protection For Analog Input

DIN-Rail Compatible

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

Supports Stacking Installation

Specifications:

• Power Supply: 7-36 V (DC)
• Communication Interface: RS485
• Default Communication Format: 9600, N, 8, 1
• Modbus Protocol: Standard Modbus RTU Protocol
• Sampling Accuracy: 12-bit resolution, error ≤ 3%
• Frequency: 25 Hz
• Input Mode:
  • Single Ended
  • Differential Input
  • Voltage and Current Simultaneous Acquisition
• Input Voltage: 0 - 10 V
• Input Current: 0 - 20 mA
• Sampling Resistor: 499 Ω
• Dimension: 121 x 72 x 34 mm

• 1 x Modbus RTU Analog Input 8 Channel
• 1 x Female DC Jack Terminal
• 10 x Circuit Connector Pins (To change to current acquisition mode)

• Modbus RTU Analog Input 8 Ch Wiki, from Waveshare