The King Pigeon S275 is a highly integrated, modular remote terminal unit (RTU) designed for professional-grade wireless telemetry and remote control. Within a single compact enclosure, the S275 combines GSM/GPRS cellular communication, a sophisticated I/O system, and an industrial RS-485 data interface, providing a comprehensive solution for monitoring assets in remote or unstaffed locations.

Versatile I/O and Modbus Expansion

What sets the S275 apart is its exceptional I/O density. It features 8 digital inputs for monitoring status or pulse counting, 6 high-precision 12-bit analog inputs for sensors (4-20mA or 0-5V), and 4 relay outputs for direct control of pumps, valves, or switches. For applications requiring even more data points, its RS-485 port functions as a Modbus RTU Master, allowing it to aggregate data from up to 320 registers across multiple external devices like power meters or PLC extensions.

Intelligent Alerting and Cloud Integration

The S275 acts as an intelligent watchdog. Users can program specific alarm thresholds for any input; once a threshold is breached, the unit can instantly send SMS alerts to up to 10 authorized phone numbers or transmit data via GPRS to a central server. It is natively compatible with the King Pigeon Cloud, as well as mainstream platforms via Modbus TCP, ensuring that real-time data is accessible from any web browser or mobile app. The integrated SD card slot ensures that all historical data is logged locally, providing a critical backup if cellular service is interrupted.

Key Features

• Redundant Power Management: Supports 9-36V DC input with built-in battery backup management to ensure operation during power outages.
• Logic Programming: Supports internal interlock logic, allowing the RTU to trigger outputs based on input states without needing a separate PLC.
• Industrial Reliability: Housed in a robust metal casing with 35mm DIN-rail mounting, designed to withstand harsh industrial electromagnetic environments.
• Cost-Effective Connectivity: Uses standard GPRS networks to eliminate the need for expensive wired infrastructure in remote monitoring sites.

Typical Applications

• Smart Agriculture: Remote monitoring of soil moisture, temperature, and automated greenhouse irrigation.
• Water Treatment: Tracking reservoir levels, flow rates, and controlling pump stations wirelessly.
• Energy Management: Remote reading of Modbus power meters and monitoring of distribution transformer status.
• Security & Safety: Remote fire alarm monitoring and base station site security management.