SAIA PCD4.H440｜Programmable Logic Controller｜

Key Features

High-Performance Computing Core
32-bit high-performance industrial CPU supports true multitasking (up to 16 tasks). Simultaneously runs logic control, PID process adjustment, data acquisition, and protocol parsing with real-time responsiveness (basic instruction execution time ≤ 0.5 µs).

Full-Function Modular Expansion
CPU module is completely separated from I/O, communication, and special-function modules (high-speed counting, motion control, etc.), enabling large-scale I/O expansion and custom functionality without bottlenecks.

Industrial-Grade High Reliability
Wide-temperature design (–25 °C to +70 °C), EMC compliance (IEC 61000-6-2/6-4) and vibration resistance (IEC 60068-2-6). Suitable for harsh environments such as industrial workshops and outdoor control cabinets.

Integrated Multi-Protocol Communication
Multiple built-in industrial interfaces allow mainstream bus and Ethernet communication without additional modules. Enables cross-system data exchange with SCADA, MES, and upper-level systems.

Security & Redundancy Support
Select models support redundant power modules, program backup/recovery, online firmware updates, reducing downtime risk and improving system availability.

Category-Specific Specifications

Core Performance

Processor: 32-bit industrial CPU, multitasking scheduler (max. 16 tasks), ≤ 0.5 µs basic instruction time

User Memory: 2 MB standard (program + data); expandable to 8 MB Flash for backups/historical data

Real-Time Clock: Built-in RTC with lithium battery backup, ±30 s/month; supports NTP synchronization (Ethernet required)

I/O Expansion Capability

Central I/O Points: Up to 1024 (PCD4 dedicated I/O modules)

Remote Expansion: Profibus DP, Modbus RTU/TCP, CANopen (master/slave), up to 4096 remote I/O points

Supported Modules: DI/DO (standard/high-speed), AI/AO (16-bit), temperature (PT100/thermocouple with cold-end compensation), high-speed counting (up to 1 MHz), pulse output for step/servo (up to 500 kHz)

Integrated I/O Channels

Digital: 16 DI (24 VDC, PNP/NPN configurable, supports interrupts) + 8 DO (24 VDC, 1 A/point, supports PWM)

Analog: 8 AI (4-20 mA/0-10 V, configurable ±10 V or thermocouple, 16-bit resolution) + 2 AO (4-20 mA/0-10 V, 16-bit)

Communication Interfaces

Serial Ports: 4 configurable RS-232/RS-485 (Modbus RTU, SAIA PCD Link, ASCII)

Industrial Bus: Built-in Profibus DP master/slave (DP-V1), CANopen master/slave (DS301/DS401)

Ethernet: 2 integrated Gigabit ports (TCP/IP, Modbus TCP, EtherNet/IP, PROFINET IO slave; optional PROFINET IO master module)

Other: Supports expansion to Profinet, EtherCAT, Modbus TCP master modules to fit various network architectures

Special Functions

Motion Control: 2-axis pulse motion (point control, linear interpolation); expandable to 4-axis with dedicated module

Process Control: 32 built-in PID loops (self-tuning, feed-forward, adaptive closed-loop regulation of temperature, pressure, flow)

Data Recording: Historical data storage with SD card module, configurable period 1 ms–1 h for trend analysis and fault tracing

Safety Function: Optional safety module (PCD4.SAFE) supports SIL 2 safety level for emergency stop, safety door monitoring, etc.

SAIA PCD4.H440｜Programmable Logic Controller｜

Physical & Certification