Modbus-Relais

The modbus relay developed by Zongheng Intelligent Control is a product that integrates transmission and remote control. Supports Modbus protocol, Modbus RTU/TCP protocol, etc. Some devices also support MQTT and JSON protocols.

It can be used with PLC to achieve remote control, and is often used in industrial automation production, elevators, smart buildings, etc. in various scenarios. The product itself has many functions and has local logic operation functions, which can meet some small application scenarios, such as automatic switching of pump stations, and in automatic supervision of water plants, it can be used with water level sensors to realize automatic switching, etc. The specific functions of each product can be viewed in detail in the product center of this site.

modbus relay selection

product picture	Network/Model	Schnittstelle	Funktion
	4G-Vollnetzkommunikation ZHC492CG	4DI/4DO/4AI/1RS485	Support multiple satellite positioning systems: GPS, Beidou, QZSS Conditional control Automatic collection Timing control
	4G-Vollnetzkommunikation ZHC493C	2DI/1DO/1AI/1RS485	Modbus RTU/TCP adaptive Dry and wet node IO detection local logic processing operations Configuration software docking 4-way Socket
	4G-Vollnetzkommunikation ZHC492C	4DI/4DO/4AI/1RS485	A network IO product with 4 channels of relay (COM, NO, NC) output, 4 channels of analog quantity (current 4~20mA) detection, and 1 channel of serial port transparent transmission, compatible with Modbus RTU/TCP protocol.
	4G-Vollnetzkommunikation ZHC4931	1RS485/232/2DI/1DO/1AI	Supports local logic processing operations, automatic collection and active reporting, Modbus RTU/TCP adaptation, automatic calibration threshold reporting, configuration software docking, and wet and dry node IO detection
	4G-Vollnetzkommunikation ZHC4921	4DI/4DO/4AI/1RS485	Supports local logic processing operations, automatic collection and active reporting, Modbus RTU/TCP adaptation, automatic calibration threshold reporting, configuration software docking, wet and dry node IO detection and other special functions
	4G-Vollnetzkommunikation ZHC4922	4DI/4DO/4AI/1RS48	MQTT RTU/TCP adaptive, automatic calibration threshold reporting, configuration software docking, dry and wet node IO detection and other special functions
	4G-Vollnetzkommunikation ZHC4941	8DO/8DI/8AI/485/232	Supports local logic processing operations, automatic collection and active reporting, Modbus RTU/TCP adaptation, automatic calibration threshold reporting, configuration software docking, wet and dry node IO detection and other special functions

Ethernet

ZHC1921

RS485/4DI/2PIN/4DO/4AI

Supports 4-way Socket, Modbus RTU/TCP adaptive, local logic processing calculations, automatic collection and active reporting, DO remote follow AI/DI, configuration cloud real-time monitoring PLC, automatic IP address acquisition, DNS domain name resolution and other special functions

Ethernet

ZHC1931

RS485/RS232/2DI/1DO/1AI

Supports 4-way Socket, Modbus RTU/TCP adaptive, local logic processing, automatic collection and active reporting, DO remote follow AI/DI, configuration cloud real-time monitoring PLC, automatic acquisition of IP address

LoRa-Netz

1RS485/4DI/2DO

Support AES communication encryption. Using the serial port for sending and receiving lowers the threshold for wireless applications and enables data transmission from the serial port to LoRa.

basic skills:

√ Support Modbus RTU/TCP

√ 4 relay outputs

√ 4 DI (dry/wet node) inputs

√ 4 analog (current) inputs

√ TCP_Client/ MQTT_Client

√ Set time point to trigger action

√ Cloud forwarding, cloud networking

√ Local logic, inter-device logic

√ Network registration package, heartbeat package

√ Hardware watchdog

√ Data triggering and regular reporting

√ Remote configuration, remote upgrade

√ The host computer supports import and export of configuration files