AAll products on this website are discounted products, and market prices have been fluctuating. Please refer to customer service quotes for details. Pictures are not actual photos. Before placing an order, please confirm the model, product, price, and other detailed information with customer service. Both second-hand and brand new products are available for sale on this website. Please contact customer service for further communication.
Modules: Input/output elements housed in a casing, compatible with the PCD1/2 system.
Module holders: Devices such as CPUs, RIOs, or LIOs, to which modules can be attached.
Overview Section
SAIA PCD3.W340｜Programmable Logic Controller｜
1. Processor & Storage Performance
CPU: 32-bit industrial-grade processor, official nominal speed 1.2 MIPS, supports multitasking and concurrent processing for logic control and analog regulation (e.g. PID loops)
Program Storage: 1 MB built-in Flash for user programs and system configurations; program encryption prevents unauthorized modification; non-volatile Flash retains data without batteries
Data Storage: 256 KB RAM for real-time variables and cache; optional external lithium battery module (e.g. PCD3.BAT1) retains critical data up to 1–2 years on power loss
2. Integrated I/O Interfaces (Built-in)
Optimized for small and medium control tasks, combining digital and analog signals:
| I/O Type | Specification |
|---|---|
| Digital Inputs | 12 points, 24 V DC universal (sinking or sourcing selectable by software); response time ≤ 1 ms; high noise immunity |
| Digital Outputs | 8 points, 24 V DC transistor output; max. 0.5 A per point, total ≤ 4 A; supports PWM pulse output for speed control, dimming, etc. |
| Analog Inputs | 2 points, 12-bit; 0–10 V DC / 4–20 mA (software-configurable); input impedance ≥ 100 kΩ (voltage), ≤ 250 Ω (current); suited for sensors (temperature, pressure, etc.) |
| Analog Output | 1 point, 12-bit; 0–10 V DC / 4–20 mA (software-configurable); load ≤ 500 Ω (voltage), ≤ 600 Ω (current); for actuators (valves, VFDs, etc.) |
3. Communication Interfaces
Programming / Debugging Port: 1 × USB 2.0 for direct PC connection, program upload/download, online monitoring, and debugging — no adapter needed
On-Site Communication Port: 1 × RS-485 supporting Modbus RTU and SAIA “PCD Link” protocols, baud rate up to 115 200 bps; connects HMI, drives, smart sensors, etc.
Expansion Potential: Additional communication modules (e.g. Ethernet PCD3.E810, Profibus DP, CANopen) can be added via SAIA’s dedicated PCD Bus to upgrade to industrial Ethernet or fieldbus architectures for larger systems
SAIA PCD3.W340｜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.
There are no reviews yet.