Motor or fan speed measurement and PWM speed control module RS485 communication WJ155

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

Product Overview:

The WJ155 product realizes signal acquisition between sensors and hosts, used to collect motor speed and control PWM motors. WJ155 series products can be applied

In RS-485 bus industrial automation control systems, automation machine tools, industrial robots, three coordinate positioning systems, displacement measurement, stroke measurement, angle measurement

Measurement, speed measurement, flow measurement, product counting, etc.

The product includes signal acquisition, pulse signal capture, signal conversion, and RS-485 serial communication. Each serial port can connect up to 255 WJ155 series modules,

The communication method adopts ASCII code communication protocol or MODBUSRTU communication protocol, and the baud rate can be set by code, which can be hung with control modules from other manufacturers

On the same RS-485 bus, it is convenient for computer programming.

The WJ155 series products are intelligent monitoring and control systems based on microcontrollers, with all user set addresses, baud rates, data formats, and parity checks

The configuration information such as verification status is stored in non-volatile memory EEPROM.

The WJ155 series products are designed and manufactured according to industrial standards, with no isolation between signal inputs/outputs, strong anti-interference ability, and high reliability. Working temperature

The temperature range is -45 ℃ to+85 ℃.

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 PWM signal 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 MODBUS RTU communication protocol. The module automatically recognizes the communication protocol,

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; communication

The longest distance of the network can reach 1200 meters, 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

Digital filtering can also effectively suppress power frequency interference from the power grid

Product manual：https://www.wayjun.cn/d/en.html