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RS485 Remote IO Module

Basic Information
Place of Origin: Sichuan, CHINA
Certification: CE FCC RoHs
Model Number: ZHT4400
Minimum Order Quantity: 1PCS
Price: USD22~28/PCS
Packaging Details: 270*180*55mm CARTON PACKAGE
Delivery Time: 1 WEEK
Payment Terms: L/C, T/T, Western Union
Supply Ability: 50000PCS/MONTH
Material: PLASTIC Interface: RS485/4DI/4DO
Product Name: Digital Signal To RS485 Remote IO Module Protocol: MODBUS RTU
Function: DAQ Converter Application: IOT Monitoring
Working Voltage: 12V Module Type: RS485
Customized: Support OEM: Support
High Light:

RS485 Remote IO Module


Digital Signal Remote IO Module


Modbus RTU DAQ Converter

Digital Signal To RS485 Remote IO Module Modbus RTU DAQ Converter



Parameters of Remote IO Module ZHT4400


Module Size
Acquisition Channel
4 Channel relay input+4 Channel relay output
Serial Interface
Supply Voltage
5 ~ 36V DC
Working Current
Operating Temperature




ZHT4400 is a serial port control module that provides 4 DI, 4 DO and a RS485 interface, support the standard Modbus RTU protocol, support dry wet node detection, support relay delay shut down after opening, we provide comprehensive technical supports. It can be widely used in pump control, access control monitoring, lighting control, such as valve monitor application scenario.



Logic Follow Setting
Function introduction: After the device is powered off, it will memorize the state before the power off. When the device is powered on again, the device will restore the state before the power off.
Note: This function is turned off by default.
Setting method: select the required follow mode at the logic follow setting, and the setting is successful after saving.

Reset function
Function introduction: Reset the device to the initial state.
Setting method: Turn all the DIP switches to OFF, that is, when the address is 31, the setting is reset. Wait 3 seconds and then turn the DIP switches back to reset successfully.



DC9~36V wide voltage
Dual watchdogs, stable operation without downtime for 24 hours
Relay output contact isolation
Dry and wet node detection
Support RS485 communication
Communication baud rate: 1200; 2400; 4800; 9600; 14400; 19200; 38400; 43000; 57600; 76800; 115200; 128000; 230400; 256000; 460800; 921600 (can be modified by software, default 115200)
Communication protocol: Support Modbus RTU protocol
01-30 device addresses can be set, and 1-30 address codes can be set with the 5-digit address dial switch


ZHT4400 supports modbus RTU, a question-and-answer communication method, which is simple, versatile and easy to use. Using rs485 communication network, the on-site switch status can be feed back to the host and the on-site switch valve can be controlled through this module



RS485 Remote IO Module 0

RS485 Remote IO Module 1

RS485 Remote IO Module 2

RS485 Remote IO Module 3

RS485 Remote IO Module 4

RS485 Remote IO Module 5

RS485 Remote IO Module 6


RS485 Modbus
4 Channel Relay Intput
4 Channel Relay Output
Standard Modbus Protocol



Contact Details

Phone Number : 8618982006591

WhatsApp : +8618982006591