Description
Saia Burgess PCD3.M5340 | Modular PLC CPU Key Spec Data
Architect’s Product Breakdown
The Saia Burgess PCD3.M5340 operates as a powerful central processing node within modular automation systems, executing high-speed logic via the component-based Saia PCD COSinus operating system. Designed for medium to high-complexity industrial automation, building control, and infrastructure applications, this processor model offloads processing overhead while accommodating up to 1024 local and distributed I/O channels. Unlike standard CPU modules, the PCD3.M5340 integrates a rich suite of onboard communications—including Ethernet TCP/IP (with an embedded Web and FTP server), a USB programming port, RS-232, and software-configurable RS-422/RS-485 interfaces.
Deploying or replacing this CPU model requires careful verification of memory structures and hardware settings within the Saia PG5 Controls Suite. Unlike the related PCD3.M5540 (which features S-Net/MPI), the PCD3.M5340 utilizes an integrated RS-422/485 interface where line termination networks are configured directly via PG5 software options. Field engineers carrying out maintenance swaps must back up flash storage and verify IP addresses prior to commissioning to avoid network configuration conflicts or lost supervisory data streams.
PCD3M.5340
Key Technical Specifications
- Manufacturer: Saia Burgess Controls (Honeywell)
- Product Category: PLC CPU / Processor Base Module
- Part Number / Catalog No.: PCD3.M5340 (PCD3M.5340)
- Program Memory: 2 MB RAM user program memory
- Flash Memory / Storage: 128 MB internal Flash memory (file system / backup)
- I/O Capacity: Up to 1024 central/remote I/Os across up to 4 local slot holders
- Onboard Communication Interfaces:
- 1× Ethernet TCP/IP 10/100 Mbit (with Web and FTP server)
- 1× USB 1.1 (PG5 programming interface)
- 1× RS-232 (PGU / Port 0)
- 1× RS-422 / RS-485 (Port 3, up to 115 kbit/s)
- 1× RS-485 (Profi-S-Net / S-Bus up to 187.5 kbit/s)
- Power Supply Requirements: 24 VDC (-20% / +25%)
- Internal Bus Capacity: 5 VDC max. 600 mA / 24 VDC max. 100 mA
- Operating Temperature Range: 0°C to +55°C (standard vertical mounting)
- Dimensions & Weight: 180 mm×100.5 mm×139 mm180 mm \times 100.5 mm \times 139 mm180 mm×100.5 mm×139 mm | Approx. 800 g
Field Engineer’s Pitfall Guide (Unique Value)
- RS-422/485 Software Termination Mismatch: Unlike older hardware revisions that required physical dip switches or external termination resistors, the PCD3.M5340 configures its RS-422/485 termination network electronically via the PG5 “Hardware settings” menu. Replacing hardware without matching this setting will cause bus reflections and drop serial communication packets.
- Hot-Swapping Under Power: Never insert or remove the CPU module or attached I/O cassettes while 24 VDC bus power is applied. Hot-plugging can damage internal 5V/24V power supply distribution rails on the backplane.
- Ignoring Battery/Supercapacitor Backup Rules: While project code can reside in non-volatile flash, volatile RAM variables depend on the onboard battery/supercapacitor circuit. Always verify the data protection status (typically 1 to 3 years backup) before executing an extended power outage on critical processes.
QA & Testing SOP (Transparency)
- Visual & Origin Verification: Units undergo physical inspection to confirm clean circuit board traces, undamaged housing latches, unbroken D-Sub pins, and authentic OEM labeling.
- Live Test Bench Environment: CPU base modules are mounted onto a validated PCD3 test rack, connected to a 24 VDC bench power supply, and booted into the COSinus OS to check diagnostic status LEDs.
- Interface & Memory Diagnostics: Technicians execute full RAM/Flash memory read/write cycles, verify USB and Ethernet communications, and test multi-channel serial polling routines.
- Anti-Static Packaging: Post-testing, units are sealed inside dissipative ESD shielding bags and packed with high-density protective foam to prevent physical shock during shipment.
Technical FAQ
Can I hot-swap the PCD3.M5340 CPU module while the control cabinet is powered? No. Replacing the CPU or base rack hardware under power can arc backplane pins and corrupt local I/O communications. Always de-energize main 24 VDC power before servicing.
What is the difference between model PCD3.M5340 and model PCD3.M5540? The PCD3.M5340 provides an integrated RS-422/485 serial interface on Port 3 instead of the Profibus-DP Slave/S-Net/MPI interface found on the PCD3.M5540.
How is the onboard web server accessed on this CPU module? The integrated web server can be accessed by connecting an Ethernet cable to the 10/100 Mbit RJ-45 port and navigating to the unit’s assigned IP address using any standard browser.
What is the standard warranty status for surplus inventory units? Verified surplus or factory-sealed PCD3.M5340 processor units typically carry a 12-month operational warranty covering component and manufacturing defects under normal operating conditions.
