-
Product Center
National tollfree hotline -
BlogWe Are Not Professional Media Reports, But What We Want To Say Is Here
National tollfree hotline -
About UsHunan Chengyuan Electrical CO.,LTD stock code 872783 was founded in 1999, is a photovoltaic new energygeneration, energy storage, charging integrated system solutions
National tollfree hotline
Ec02
PLC control cabinet
Category:
Email:
General description:
Product Description
—— One-stop industrial brain from demand to operation and maintenance
I. Product Positioning
The PLC control cabinet is a complete set of equipment that integrates power distribution, control, protection, and communication functions with a programmable logic controller as its core. It is used to complete logical operations, sequential control, process regulation, and data acquisition in industrial sites. It can operate independently or be connected to SCADA/DCS/IoT platforms.
II. Core Technical Parameters
| Item | Typical Range |
| Rated Operating Voltage | AC 220 / 380 / 400 / 480 V，50/60 Hz |
| Control Power Supply | DC 24 V (20.4 – 28.8 V), optional redundancy |
| Rated Current | Main circuit 10 – 630 A |
| Short-time Withstand | 4 – 30 kA / 1 s |
| Protection Level | Indoor IP30 – IP54, Outdoor IP55 – IP66 |
| Cabinet Material | Cold-rolled steel plate 1.5 mm or 304/316L stainless steel |
| Ambient Temperature | –10 ℃ ~ +55 ℃ (Outdoor –25 ℃ ~ +55 ℃) |
| Communication Interface | RS-485、Modbus-RTU / TCP、Profinet、EtherNet/IP、4G/LoRa |
III. Standard Design Process (4-Week Delivery)
1. Requirements Clarification: Control objectives, action sequence, expansion redundancy
2. I/O Point Table: Digital, analog, communication ports, ≥ 20% redundancy reserved
3. Electrical Schematic Diagram: Conforms to GB/T 6988 & IEC 61082, unified component numbering
4. PLC Program Development: Modular structure, flowchart first, then coding, supports ST / LD / SFC
5. Wiring Diagram Drawing: Clear terminals, consistent numbering, 1:1 alignment between drawings and physical objects
6. Wiring and Debugging: Connecting and testing simultaneously, single-step program verification, automatic test report generation
7. Document Archiving: Wiring diagrams, program backups, password keys, maintenance manuals
IV. Functional Modules (Combinable as Needed)
| Module | Component Example |
| Power Supply Unit | Main switch, UPS, isolation transformer, EMI filter |
| PLC Unit | Siemens S7-1200/1500, AB CompactLogix, Schneider M241/251, Omron CP1/CP2 |
| I/O Expansion | Digital 8 – 512 points, analog 4 – 256 channels, thermocouple/RTD/high-speed counter |
| Drive Unit | Inverter, soft starter, servo drive, stepper drive |
| Human-Machine Interface | 7″ – 15″ color touch screen, WinCC Flexible, FactoryTalk, EcoStruxure |
| Communication Unit | Industrial switch, 4G DTU, LoRa gateway, OPC UA server |
| Protection Unit | Leakage relay, phase sequence relay, temperature relay, arc protection |
V. Wiring Specifications (Avoiding "Hidden Landmines")
• Power supply: Three-phase five-wire system, N and PE strictly separated; control power supply uses an isolation transformer
• Grounding: Control ground, protective ground, and equipment ground are wired separately → unified grounding point, grounding resistance ≤ 4 Ω
• Cable color: AC220 V brown-black-gray, DC24 V blue, PE yellow-green double color, shielded twisted pair signal cable
• Terminal layout: Input, output, power supply, communication zones, 20% redundant terminals reserved
• Emergency stop circuit: Hardware emergency stop relay + PLC software double interlock, emergency stop button normally closed contact directly cuts off the main contactor coil
VI. Typical Application Scenarios
• Water treatment: Pump group rotation, level PID, chemical dosing
• HVAC: Fan frequency conversion, temperature and humidity cascade, CO₂ concentration linkage
• Logistics warehousing: Stacker, shuttle car, conveyor line, AGV scheduling
• Smart agriculture: Greenhouse rolling film, drip irrigation, environmental monitoring, remote irrigation
• Explosion-proof occasions: Ex d IIC T6 control box + explosion-proof touch screen + explosion-proof gland
Key word: Photovoltaic | Semiconductor | Silicon Carbide | Sapphire | Magnetic Materials | Silicon Wafer Cutting Service
Relevant Products
Ec02
PLC control cabinet
Pdx
Distribution boxes (various specifications, customized on demand)
Non-standard customized electrical cabinet
1032955512804433921
Integrated console
Contact Us
*Note: Please be sure to fill in the information accurately, and keep the communication unblocked, we will get in touch with you as soon as possible
*Note: be sure the information is filled accurately and the communication is clear, and we will get in touch with you as soon as possible
Room 504, Building 8, Xincheng Science and Technology Park, 588 Yuelu West Avenue, Changsha High tech Development Zone, Hunan Province, China