Overview

The ABB PM554‑T CPU is part of the AC500 PLC series, designed for industrial automation, machine control, and process applications. It integrates processing power, digital I/O, and communication interfaces into a compact unit, providing cost-effective automation for small to medium-scale systems.

The module includes 8 digital inputs and 6 digital outputs onboard, minimizing the need for expansion in smaller installations. It also supports RS‑485 communication and two option slots for flexible expansion. Designed for 24 V DC supply voltage, the PM554‑T features robust protection against electrical disturbances, ensuring long-term reliability in harsh industrial environments.

Technical Data

Typical Applications

• Machine Automation: Controls packaging machines, conveyors, and assembly lines.

• Process Industries: Supervises pumps, mixers, and sensors in chemical and food production.

• Building Automation: Manages HVAC, lighting, and utility monitoring.

• Water Treatment Facilities: Controls dosing pumps, valves, and monitoring equipment.

• Infrastructure Systems: Supports small distributed automation in utilities and transport.

Example:
In a packaging plant, the PM554‑T directly handles sensor inputs and drives actuators without additional modules, simplifying installation and reducing hardware costs.

FAQ

Q1: How many I/O channels are integrated?
8 digital inputs and 6 digital outputs.

Q2: What communication options are available?
RS‑485 port and two option slots for expansion.

Q3: What is the program memory size?
128 kB program memory with 142 kB RAM.

Q4: What voltage does it operate on?
24 V DC (range: 20.4–28.8 V DC).

Q5: Which industries typically use the PM554‑T?
Machine automation, process industries, building automation, and water treatment systems.