ABB PM554 PM 554 1TNE968900R0100 Central Processing Unit

ABB PM554 – AC500-eCo CPU Module

The ABB PM554 is a compact CPU module in the AC500-eCo PLC series. It integrates processing, communication, and I/O expansion in a single unit for small to medium automation systems.

• Processor: 32-bit RISC CPU
• Program Memory: 512 KB Flash
• Data Memory: 256 KB RAM
• Backup Memory: 128 KB battery-backed SRAM
• Instruction Cycle Time: 0.1 µs per instruction
• Integrated I/O: 12 digital inputs, 8 digital outputs, 2 analog inputs
• Communication: RS-485 (Modbus), CANopen
• Operating Voltage: 24 VDC
• Protection: IP20
• Operating Temperature: 0°C to +60°C
• Storage Temperature: −40°C to +70°C
• Dimensions: 142 mm × 90 mm × 75 mm
• Weight: 0.35 kg

Technical Specifications

FAQ

1. Integrated I/O
   The PM554 includes 12 digital inputs, 8 digital outputs, and 2 analog inputs. This supports standalone operation in small systems without expansion modules.
2. Memory Backup
   128 KB battery-backed SRAM retains program data and variables during power interruptions. The battery is replaceable.
3. Expansion Capability
   The CPU supports S500 I/O expansion modules via the integrated expansion bus. Add digital, analog, and communication modules as needed.
4. Programming
   The PM554 is programmed using ABB Automation Builder software. It supports all IEC 61131-3 languages including Ladder Logic, Structured Text, and Function Block Diagram.

Installation Guide

• Step 1: Mount the PM554 on a 35 mm DIN rail. Ensure the rail is grounded.
• Step 2: Connect 24 VDC supply to the L+ and M terminals. Install a 2 A fuse on the supply line.
• Step 3: Wire integrated I/O points to field devices. Use 0.5–1.5 mm² wire.
• Step 4: Install expansion modules to the right of the CPU. Slide them together until the connectors mate.
• Step 5: Connect the programming cable to the RS-485 port. Download the application program and verify operation.

Selection Tips

Select PM554 for small to medium automation projects requiring a compact CPU with integrated I/O. For larger systems, upgrade to PM571, PM573, or PM5xx series with more memory and Ethernet. The PM554-RP variant includes RS-485 and CANopen. The PM554-TP-ETH variant adds Ethernet and a text display.