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SAIA PCD3.W315｜PLC/CPU Module｜
1. Processor & Memory
CPU: 32-bit processor, ~160 MHz, supports multitasking with configurable task priorities for real-time small/medium system control
Program Memory (Flash): 8 MB for control programs and parameter files; non-volatile, no data loss on power failure
Data Memory (RAM): 4 MB for temporary data caching; supports optional lithium battery backup (~5 years) to prevent data loss
2. Input/Output (I/O)
Onboard I/O: None
Expansion: Requires PCD3 series expansion modules
Maximum I/O Points: Up to ~256 points, depending on module type and bus load
Compatible Modules:
Digital I/O: PCD3.D110 (16-point input), PCD3.O110 (16-point output)
Analog Modules: PCD3.A111 (4-channel input), PCD3.AO11 (2-channel output)
Special Function Modules: PCD3.C100 (counter), PCD3.P100 (PID adjustment)
Expansion Method: Plug-in via PCD3 bus backplane; some modules support hot plugging
3. Communication Interfaces
Standard: 1 × RS-485 supporting Modbus RTU and SAIA PCD proprietary protocols
Optional: Ethernet via additional communication module
4. Power Supply & Electrical
Voltage: 24 V DC (range 18–32 V DC), surge and interference resistant
Compliance: Meets EN 61000-6-2 EMC standard for industrial environments
5. Environmental & Mechanical
Operating Temperature: 0–60 °C (non-condensing)
Humidity: 5–95 % RH (non-condensing)
Protection Level: IP20 (designed for installation inside standard electrical control cabinets)
6. Programming & Software
Software: Compatible with SAIA PG5 programming environment (recommended V2.2+)
Languages: IEC 61131-3 compliant — Ladder Diagram (LD), Function Block Diagram (FBD), Structured Text (ST)
7. Certifications
Safety & Compliance: CE, UL (meets industrial equipment safety standards, suitable for EU and US markets)
8. High Reliability
Industrial Grade: Wide temperature components; resistant to dust, voltage fluctuations, and electromagnetic interference (e.g., motor start/stop)
MTBF: >100,000 hours
Hardware Watchdog: Automatic restart and recovery from program errors or system faults
Power Failure Protection: RAM backed by lithium battery; critical data (production counts, process parameters) retained
9. Flexible Expansion
Compatibility: Fully supports PCD3 expansion modules (digital, analog, and special function)
Ease of Use: Modules plug into the bus backplane; some support hot swapping without powering off
SAIA PCD3.W315｜Programmable Logic Controller｜
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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