The rapid development of network and communication technology has provided RTU technology with more advanced and better performance, and has also brought wider applications to RTU products. In order to make it easy for beginners to use it, a simple RTU wiring tutorial will be introduced below to make it easy for everyone to understand. This article mainly takes Chengdu Zongheng Intelligent Control RTU products as an example.
ZHC4921 is an industrial-grade 4G RTU . It is a high-performance remote measurement and control terminal that integrates analog signal acquisition, switching input, switching output, RS485 serial communication and 4G/3G/2G wireless data communication. It can be directly connected to various Analog signals, level signals, dry/wet contacts, etc. output by sensors, standard transmitter signals, instruments, etc., support local logic processing operations, automatic collection and active reporting, Modbus RTU/TCP adaptation, automatic calibration threshold reporting, group With special functions such as dynamic software docking, it is the best choice for implementing wireless measurement and control applications.
1. RTU equipment accessories wiring diagram
2. DI input wiring method
ZHC4921 is divided into dry node input circuit and wet node input circuit. Users need to determine the wiring method according to the product input type.
A) Dry node wiring method:
A passive switch is connected in series between the DI input terminals DIX and COM, and the state of the input quantity is controlled by controlling the closing and opening of the switch. The specific wiring method is as follows:
B) Wet node wiring method:
It is necessary to provide an external power supply with a voltage range of 0~50VDC. A switch is inserted in series between COM and DIX to control the on and off of the power circuit. COM is connected to the negative pole of the power supply and DIX is connected to the positive pole of the power supply.
3. DO output wiring method
ZHC4921 DO output uses a single normally open relay. The user can control the opening and closing of the relay to control the on and off of the peripheral circuit.
Note: When connecting a high-power inductive load, it should be noted that the maximum start-stop current of the load should be within the carrying range of the equipment. It is recommended to use this device as a controller to control an intermediate relay to avoid damage to the output interface of this device due to excessive current.
4. AI current detection wiring method
AI current detection wiring method:
The above is a simple RTU wiring tutorial. If you need to know more about the product, you can view more detailed introduction on the official website of Zongheng Intelligent Control.
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