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SAIA PCD4.M120｜Programmable Logic Controller｜
Key Features
Modular Architecture
CPU modules are separated from I/O and communication modules, allowing on-demand combinations. Digital, analog, and special function modules (counting, positioning, temperature acquisition, etc.) can be flexibly added or removed to reduce redundancy and cost.
Wide Temperature & High Reliability
Built with industrial-grade components for a –25 °C to +70 °C operating range. Resistant to electromagnetic interference (EMC certified) and vibration, compliant with IEC 61131-2 for harsh environments such as high-temperature workshops or outdoor control cabinets.
Multi-Protocol Compatibility
Integrated rich communication interfaces support mainstream industrial buses and Ethernet protocols. Provides seamless connectivity with HMI, drives, sensors, and supervisory systems.
Category-Specific Specifications
Core Performance
Processor: 32-bit high-performance industrial CPU, basic instruction execution time ≤ 1 µs
User Memory: 1 MB standard (program + data); optional 1 MB Flash memory for backup/offline storage
Real-Time Clock: Built-in RTC with battery backup, time accuracy ± 1 minute/month
I/O Expansion Capability
Central I/O Points: Up to 510 points (with PCD4 series I/O modules)
Remote Expansion: Expandable to 2048 local/remote I/O points via Profibus DP or Ethernet
Supported Modules: Digital I/O, analog I/O (voltage/current), temperature acquisition (PT100, thermocouple), high-speed counting up to 100 kHz
Communication Interfaces
Serial Ports: Up to 6 configurable ports supporting RS-232, RS-422, RS-485, TTY 20 mA
Industrial Bus: Profibus DP (Master/Slave), Profibus EMS
Ethernet: Standard TCP/IP interface, supports Modbus TCP and SAIA PCD dedicated protocol (for communication with SAIA software)
Analog Processing
Integrated Channels: 7 analog inputs (default 0–20 mA, software-configurable range)
Resolution: 12-bit (0–4095), LSB = 5 µA
Precision Optimization: Built-in moving average and filtering algorithms achieve accuracy exceeding standard 12-bit performance
SAIA PCD4.M120｜Programmable Logic Controller｜
Physical & Certification
| Parameter | Value |
|---|---|
| Dimensions (W×H×D) | ~100 × 120 × 80 mm (DIN-rail, see manual) |
| Protection Level | IP20 (install inside closed control cabinet) |
| Certifications | CE, UL, CSA, RoHS compliant |
By structuring the information in this manner, the article provides a clear and organized understanding of input channels, transducer supply, and communication implementations in distributed control systems.
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