Introduction to analog acquisition module
There are currently 4 products of analog acquisition modules developed by Chengdu Zongheng Intelligent Control. This product can be used to collect standard signals from transmitters such as pressure, temperature, and displacement; collect flow data from flow meters and pulse meters; collect operating status of water pumps or valves, equipment power supply status, and door opening and closing status, etc. Supports Modbus RTU/TCP adaptive, provides 1 channel RS485, automatic collection and active reporting, 4~20mA, 0~20mA analog control collection, automatic calibration threshold reporting, local logic operation and other special functions, supports one-to-one and many-to-one Networking. This product has multiple functions such as measurement data collection, measurement data collection, equipment switch status collection and external logic control. It is mainly used as data collection, control and display equipment for various measurement and control terminals, and is widely used in automation and informatization in various industries. system.
Analog acquisition module classification
| network | Analog acquisition module model |
| 4G full network communication | ZHC4661 (4-channel analog) |
| GPRS network | ZHC2931 (1 channel analog) |
| LoRa network | ZHC0661 (4-channel analog) |
| Ethernet | ZHC1661 (4-channel analog) |
*Tip: If the analog acquisition interface is not enough, you can use the Zongheng Intelligent Control expansion module to add an interface.
Basic functions of analog acquisition module
1. Data transparent transmission, supporting two-way transparent transmission
2. Support serial heartbeat package, network registration package, heartbeat package
3. Host and slave modes. The host mode supports RS485 cascading of multiple devices.
4. Support multiple protocols, TCP_Client, HTTP_Client, Modbus RTU/TCP
5. Support cloud forwarding and cloud networking setting APN
6. Local upgrade, remote upgrade, SIM card number query, virtual serial port remote operation
Analog acquisition module features
1. Multiple networking methods, supporting one-to-one networking and one-to-many networking.
2.Support Modbus RTU/TCP adaptive
3. Support active data collection and upload to the server
4. Support automatic calibration and advance reporting
5. Support local logical operation functions, similar to gateway de borda computing functions.
Analog acquisition module application cases
(1) Application in tap water supply supervision
The water plant supervision is intelligent, collecting the water level of the clean water tank, outlet pressure, valve opening, operating status of each pump, status of each dosing equipment and water quality monitoring. The valve switch and opening are automatically controlled by the pool water level. Principle – Function: Two devices in a set perform AO and AI point-to-point output. End A detects the water level and end B controls the opening of the valve through current. Collect water level through zhc4931 to realize local logic control DO output. Automatically controls DO on and off when the water level reaches the specified value.
(2) Application in power monitoring
Utilize Internet of Things technology – data monitoring and control terminal (Zongheng 4G RTU ZHC4931) plus PLC, configuration software, and sensors. The current, temperature, and voltage status data of the monitoring points are regularly collected and sent to the configuration software of the customer’s local computer for real-time detection. Threshold alarms are set through the software and corresponding operations are performed, such as shutting down a certain power equipment. Zongheng Intelligent Control RTU supports threshold reporting function. This solution can help users solve power monitoring problems in a timely manner, eliminate safety hazards, and reduce property losses.
