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AJMRTC Industrial RS485 Modbus RTU 8CH PWM Input Module, 8-Channel Pulse Frequency & Duty Cycle Acquisition, High-Speed Optocoupler Isolated Inputs, DC 7-36V Wide Power Supply, DIN Rail Enclosure with
- - Simultaneously collects PWM pulse frequency and duty cycle data from 8 independent input channels
- - Standard RS485 bus communication with Modbus RTU protocol for seamless PLC, HMI and SCADA integration
- - High-speed optocoupler isolation on all signal inputs, eliminates ground loop and common-mode interference
- - Built-in TVS surge suppressor and resettable fuse for overcurrent, overvoltage and ESD protection
- - Wide DC 7~36V power input range, stable operation for cabinet and field industrial deployment
- - Onboard TXD, RXD and STATUS LED indicators for quick communication and working status checking
- - Supports configurable Modbus station address and baud rate for multi-module cascading on one RS485 bus
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Overview
Specs
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AJMRTC industrial 8-channel PWM acquisition module reads pulse frequency and duty cycle from external PWM signals and transmits measured data over RS485 using Modbus RTU. Each input channel adopts high-speed optocoupler isolation, paired with TVS and fuse protection circuits to withstand electrical spikes in noisy factory environments. It supports wide 736V DC supply and comes in a compact DIN rail mount housing for easy installation inside electrical cabinets. Visible status LEDs help technicians verify bus transmission and module operation rapidly. It is widely used for motor speed monitoring, fan PWM signal detection, flow pulse meter reading, encoder signal collection, and distributed industrial IoT data acquisition systems.
Specifications:
- Brand: AJMRTC
- Channel: 8 PWM pulse input channels
- Communication: RS485
- Protocol: Modbus RTU
- Input Isolation: High-speed optocoupler isolation
- Protection: TVS, resettable fuse, surge & ESD protection
- Power Supply: DC 7V ~ 36V
- Mounting: Standard 35mm DIN rail
- Indicators: STATUS, TXD, RXD LED status lights
- Adjustable Parameters: Modbus address, serial baud rate
- Measured Signals: Pulse frequency, PWM duty cycle
- Application: Motor monitoring, fan speed detection, pulse flow meter, encoder sampling, PLC expansion, industrial data logging
Warranty & Returns
Warranty, Returns, And Additional Information
Warranty
- Please contact the Seller directly for warranty information. Warranty information may also be found on the Manufacturer's website.
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Return Policies
- Return for refund within: 30 days
- Return for replacement within: non-replaceable
- This item is covered by ConnectFlow USA Return Policy
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