Modbus TCP Remote IO Module 8 Channel RS485 Converter DAQ Remote Terminal Unit

Parameters of Remote IO Module ZHT4400

• Introduction​ of Remote IO Module ZHT4400

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.

Communication Protocol Description
This product supports standard modbus commands. For detailed command generation and analysis methods, please refer to the register table in this article. This product supports modbus RTU format.

Product model: ZHT4400, the product is mainly used to expand the RTU product interface and does not provide communication functions. Provide 4DI/4DO interface, provide 4 relay output, 4 switch input.
Features: Support dry and wet node detection, support relay to be turned off after the delay is turned on, simple and convenient to use. Application: remote control of water pumping station, valve control, access control system, etc.

Features:

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

• Function​ of ZHT4400

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