Motor or Fan Speed Measurement and PWM Speed Control Module RS485 Communication

Product features:
 Motor speed measurement converted to standard Modbus RTU protocol
 Output a PWM signal that can be used to control the motor speed
 Speed pulse input supports PNP and NPN inputs
 Automatically measure the input pulse frequency
 The number of pulses per revolution of the motor can be set to automatically convert the speed
 The frequency and duty cycle of PWM can be set through the RS-485 interface
 Wide power supply range: 8~32VDC
 High reliability, easy programming, and easy application
 Standard DIN35 rail installation, convenient for centralized wiring
 Users can program module addresses, baud rates, etc
 Typical applications:
 Measurement and Control of Industrial Four Wire Fans
 Air conditioning fan control
 Motor measurement and control
 Servo control
 Measurement of proximity switch pulse signal
The speed signal is transmitted remotely to the industrial computer
 Intelligent Factory and Industrial Internet of Things

Since: 2011
Specialty: The company's main products include analog acquisition modules, signal isolators/conversion modules, and signal transmitters
Capacity: Produce 10000 per month
Advanced Features:
Switching to TCP/network/remote IO module, Modbus RTU to TCP, RS232/485 to Ethernet, analog signal (current/voltage/thermistor/frequency/displacement/speed/pulse) isolation transmitter, mV differential signal amplifier, isolation amplifier, micro power DC-DC module power supply, etc

 WJ155 General Parameters:
 (Typical @+25 ℃, Vs is 24VDC)
 Input type: speed pulse signal input.
 Low level: Input<1V

 Function Introduction:
 The WJ155 remote I/O module can be used to measure motor speed signals and output PWM signals to control the
 motor.
 1,Signal input
 1-channel speed signal input, can be connected to dry contacts and wet contacts, and the input type can be set
 through commands.
 2,signal output
 One PWMsignal output, with a high level approximately equal to the power supply voltage and a low level of 0V.
 3,Communication Protocol
 Communication interface: 1 standard RS-485 communication interface.
 Communication Protocol: Supports two protocols, the character protocol defined by the command set and the
 MODBUSRTUcommunication protocol. The module automatically recognizes communication
 protocols and can achieve network communication with various brands of PLCs, RTUs, or computer
 monitoring systems.
 Data format: 10 digits. 1 start bit, 8 data bits, and 1 stop bit. No verification.
 The communication address (0-255) and baud rate (2400, 4800, 9600, 19200, 38400, 57600, 115200bps) can be set;
 The communication network can reach a maximum distance of 1200 meters and is connected through
 twisted pair shielded cables.
 High anti-interference design of communication interface, ± 15KV ESD protection, communication response time
 less than 100mS.
 4,anti-interference
 Parity check can be set as needed. There is a transient suppression diode inside the module, which can effectively
 suppress various surge pulses, protect the module, and the internal digital filter can also effectively suppress power
 frequency interference from the power grid.

Q: How to contact you?
A: Please contact us via email or online customer service