MRC PC-271 Product Introduction
1. Product Overview
The MRC PC-271 is a compact industrial programmable logic controller (PLC) designed for mid-range process control and automation tasks. It serves manufacturing, water treatment, and HVAC industries—focusing on applications like production line sequencing, pump/motor control, and process parameter monitoring, which are critical for maintaining operational consistency and efficiency in small-to-medium industrial systems.
Integrating modular I/O capability and user-friendly programming, it balances performance and cost-effectiveness. Compatibility with standard industrial protocols and MRC’s dedicated software ensures seamless integration into existing automation networks, making it a practical choice for decentralized control scenarios.
2. Technical Parameters (Table)
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Category
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Specification
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Device Type
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Compact programmable logic controller (PLC) with integrated I/O
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Processor Performance
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32-bit RISC processor; Instruction execution speed: ≥800,000 steps/sec
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Memory
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Program memory: 512 KB; Data memory: 256 KB; Expandable via microSD (up to 16 GB)
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Integrated I/O
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Digital inputs: 16 (24 V DC, sink/source); Digital outputs: 8 (24 V DC, 0.5 A); Analog inputs: 4 (12-bit, 0–10 V/4–20 mA); Analog outputs: 2 (12-bit, 0–10 V/4–20 mA)
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Communication Ports
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1×Ethernet (Modbus TCP/IP); 1×RS485 (Modbus RTU); Optional: Profinet expansion
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Power Supply
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24 V DC (18–30 V DC); Power consumption: ≤12 W (operating)
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Environmental Ratings
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Operating temperature: 0°C to +55°C (32°F to +131°F); Storage temperature: -20°C to +70°C (-4°F to +158°F); Humidity: 5%–95% (non-condensing); Protection class: IP20 (enclosure)
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Programming Software
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MRC AutoPro (supports IEC 61131-3 languages: LD, FBD, ST, IL)
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Mechanical Design
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Mounting: 35 mm DIN rail; Housing material: Flame-retardant polycarbonate; Dimensions: 110 mm (W) × 85 mm (H) × 55 mm (D); Weight: ~300 g (0.66 lbs)
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Certifications
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CE; UL 508; CSA C22.2 No. 14; IEC 61131-2; RoHS compliant
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3. Product Specifications & Features
3.1 Core Specifications
The MRC PC-271 is optimized for mid-scale control needs, with a 32-bit RISC processor delivering sufficient speed for 800,000 steps/sec—handling concurrent tasks like I/O monitoring and logic execution. Its integrated I/O (16 digital inputs, 8 digital outputs, 4 analog inputs, 2 analog outputs) eliminates the need for additional modules in small systems, while expandable microSD memory supports large program storage and data logging.
Dual communication ports (Ethernet/RS485) enable connectivity with HMI panels, sensors, and remote controllers. The 24 V DC power supply aligns with industrial standards, ensuring compatibility with common power systems in factories and processing plants.
3.2 Key Features
- All-in-One Design: Integrated I/O reduces system complexity and cost, ideal for space-constrained control cabinets.
- Flexible Programming: Support for IEC 61131-3 languages and MRC AutoPro software simplifies code development and maintenance for different user skill levels.
- Dual Communication: Ethernet (Modbus TCP/IP) and RS485 (Modbus RTU) enable seamless integration with industrial networks, supporting both local and remote monitoring.
- Reliable Operation: Wide temperature range and IP20 protection ensure stability in industrial environments, minimizing unplanned downtime.
- Scalability: Optional Profinet expansion and microSD memory upgrade allow the controller to adapt to growing automation needs (e.g., adding more sensors or actuators).
4. Other MRC PLC & Automation Products
MRC offers complementary controllers for diverse automation needs:
- MRC PC-270: Entry-level variant (12 digital inputs, 6 digital outputs) for basic control tasks (e.g., small HVAC systems).
- MRC PC-272: High-I/O model (24 digital inputs, 16 digital outputs) for complex applications (e.g., multi-stage water treatment processes).
- MRC PC-371: Advanced PLC with dual Ethernet ports and 24-bit analog resolution, for high-precision tasks (e.g., pharmaceutical batch control).
- MRC PC-171: Compact micro-PLC (8 digital inputs, 4 digital outputs) for space-critical scenarios (e.g., portable automation devices).
- MRC PC-471: Redundant PLC (dual CPU) for safety-critical systems (e.g., power plant auxiliary equipment control).
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