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SAIA PCD2.R6000｜SD Card Module｜
1. Hardware Architecture
Integrated Compact Design
CPU, memory, and basic I/O interfaces are integrated into a single module, eliminating the need for additional rack expansion. This reduces installation space and is ideal for control cabinets with limited space.
Expandable Versions
Some models support additional expansion modules (I/O or communication), enabling flexible scaling according to project requirements.
2. Core Performance
CPU
Equipped with industrial-grade processors; computing speed fully meets the needs of small- to medium-scale control logic, including fast execution of ladder diagrams and function block programs.
Memory
Standard configuration: program memory ~128 KB, data memory ~64 KB. Supports SD-card expansion for data logging or program backup.
Real-Time Performance
Typical scan cycle ≤ 10 ms (depending on program complexity), ensuring rapid response to control instructions.
3. Basic I/O Configuration
Digital I/O
Integrated digital channels (example: 8 inputs + 6 outputs; varies by model). Supports dry/wet contact inputs compatible with 24 V DC industrial signals. Outputs available in relay or transistor form to drive diverse loads such as solenoid valves and indicator lights.
Analog I/O (select models)
Integrated analog channels (example: 2 inputs + 1 output), directly connectable to sensor signals (e.g. 4–20 mA temperature or pressure transmitters).
4. Communication Capability
Standard Interfaces
1–2 RS-485 ports with Modbus RTU protocol for networking with drives, sensors, and HMIs.
Optional Ethernet Expansion
Ethernet module/port supporting Modbus TCP or SAIA proprietary protocols, enabling remote data exchange with supervisory systems such as SCADA.
5. Environmental Adaptability
Operating temperature: –20 °C to +60 °C
Relative humidity: ≤ 95 % (non-condensing)
Protection rating: IP20 (cabinet installation)
EMC immunity: complies with EN 61000-6-2, suitable for harsh electromagnetic environments in factories, buildings, and municipal infrastructure.
6. Programming & Debugging
Software Support
Uses SAIA PG5 programming software (version 2.3 or later).
Programming Languages
Compatible with IEC 61131-3 languages such as Ladder Diagram (LD), Functional Block Diagram (FBD), and Structured Text (ST).
Debugging Tools
Built-in online monitoring, variable forcing, and fault diagnostics reduce development and commissioning effort.
SAIA PCD2.R6000｜SD Card Module｜
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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