Automation Accessories Recommendation for Guizhou Agriculture

Considering the mountainous terrain and uneven rainfall distribution in Guizhou, we recommend customers equip a complete set of automation accessories:

1. Power System:

   Adopt industrially verified 24 V DC switching power supplies (SMPS), such as Schneider ABLS1A24050 regulated switching power supply, which provides 5 A output under 100–240 VAC input, suitable for agriculture, mining, and other scenarios to ensure stable power supply for PLCs and sensors; or Siemens SITOP series, which features UPS and redundancy functions, greatly enhancing system reliability.

2. Core Control Unit:

   Choose Siemens SIMATIC S7-1200 CPU module, which integrates high-speed counting, PWM, and positioning functions, supports seamless integration with TIA Portal, significantly shortening the engineering implementation cycle, and can expand digital/analog I/O interfaces through pre-installed signal boards, easily connecting to multiple analog sensors such as soil moisture, temperature, and pH.

3. Soil Monitoring:

   Use IP68-rated RS485 soil moisture sensors to achieve 0–100% volumetric water content and –40 ℃~+80 ℃ temperature measurement, supporting MODBUS-RTU protocol for seamless connection with data collectors; combined with highly integrated industrial pH sensors (S-pH-01A), featuring automatic temperature compensation and 4–20 mA/RS485 output, ensuring precise monitoring of the chemical environment in fermentation fields.

4. Communication Layer:

   Optional RAK7431 RS485–LoRa bidirectional bridge module to build a low-power long-distance wireless network, ensuring reliable transmission of on-site data to the cloud.

5. Execution Control End:

   Equip high-performance 24 V AC solenoid valves with large PTFE diaphragms and low-power coils, durable and reliable, suitable for long-distance installations; paired with ABB variable frequency drives (VFD), which can adjust pump station motor speed according to soil moisture needs, achieving energy savings of 20%–50% or more.

6. Human-Machine Interaction:

   On-site human-machine interaction is completed through a 7-inch industrial touch screen HMI, featuring an aluminum alloy reinforced shell and shockproof, dustproof design, supporting real-time parameter display and alarm confirmation; the entire system can be optionally equipped with an agricultural weather station, integrating temperature and humidity, light, wind speed, rainfall, and other multi-factor monitoring, supporting local visualization and cloud platform data analysis to help farmers scientifically schedule irrigation.