Saia PCD3.M5340

Product Introduction:

The PCD3.M5340 is a mid-range programmable logic controller CPU from the Saia PCD3 family (now part of Honeywell Process Solutions / formerly SBC). It features an integrated Ethernet port for programming, web visualization, and peer-to-peer communication, plus onboard RS-232 and RS-485 ports. It supports up to 1,023 I/O points and expansion via PCD3 I/O modules.

Category: Others

Description

Technical Specifications:

Program Memory: 1 MB (Flash backup 2 MB)
Data Memory / File System: Expandable to 4 GB via plug-in Flash File module
Processing Time: 0.3 µs (bit instruction), 0.9 µs (word instruction)
Max I/O Points: 1,023 (or up to 64 local I/O module slots via PCD3.Cxxx expansion)
Onboard Interfaces:
- 1 × Ethernet 10/100 Mbps (auto-sensing, full-duplex, auto MDI-X) — TCP/IP, Modbus TCP, HTTP, FTP, S-Bus
- 1 × RS-232 (D-Sub, PGU/Port 0, up to 115.2 kbps)
- 1 × RS-485 (screw terminals, Port 2, up to 115.2 kbps; Profi-S-Net capable)
- Optional RS-485 or Profibus DP on Port 3 (via expansion slot)
USB Port: 1 × USB 1.1 for local service/programming
Real-Time Clock: Yes, battery-backed (1–3 years retention)
Supply Voltage: 24 VDC (–20%/+25%), max ripple 5%
Power Consumption: Typ. 15 W (for base unit + 64 I/O)
Internal 5 V / 24 V Rail: Max. 600 mA / 100 mA for connected I/O
Operating Temp: 0 °C to +55 °C
Mounting: 35 mm DIN rail (top-hat)

Features:

Built-in Web server for HMI-less visualization and diagnostics
S-Bus (Saia proprietary) and Modbus TCP/RTU master/slave
Extensive instruction set — PID, floating-point math, string handling, time-switch
Password protection and user-level access control
Compatible with Saia PCD1/PCD2/PCD3 I/O families

Applications: Building automation (HVAC, lighting), water/wastewater treatment, small-to-medium machine control, distributed remote stations.

Installation Notes: Insert lithium backup battery after power-up to retain RTC and retentive variables. Use shielded twisted pair for RS-485 with proper termination. Assign unique IP/node address before network integration.

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