In order to maintain the high efficiency operation of the pump, the liquid level of the water tank is often controlled in the inlet pump station and the return sludge pump station of the sewage treatment plant. A liquid level meter is used to measure the liquid level of the water tank in the inlet pump station, and the liquid level signal is sent to the programmable controller system. The programmable controller controls the start and stop of the pump according to the liquid level, Keep the liquid level in the inlet tank within a certain range. In this system, the input / output signals of PLC include: liquid level signal input (analog input), running state signal of each pump (start, stop or alarm, switch input), control signal of start / stop pump (switch output). PLC is widely used in sewage treatment plant to control the operation of water pump, and the upper computer uses industrial computer to run configuration software. In this case, the ring network of industrial Ethernet is used to connect the upper computer and PLC. The computer in the central computer room monitors the operation of the main process equipment in the whole plant, collects process parameters and equipment operation status information, intervenes in the process when necessary, and sends instructions to the corresponding PLC.
Reasons for selection
6-10 / 100 TX ports web management 100 MB Ethernet packet switching function
Super ring technology, the system self-healing time is less than 20ms
-40 ~ 85 ℃, suitable for severe industrial environment
Aluminum alloy shell meets ip-30 industrial protection standard, waterproof and dustproof
Management functions include IGMP snooping V1 / V2, VLAN, QoS, rate control, etc
Single / dual 24 VDC redundant input 10 ～ 55 VDC