Product Overview

The PM902F, designated by part number 3BDH001000R0001, serves as the high-performance central processing unit for the ABB Freelance AC 900F control system. Positioned as a mid-range base unit, this module is engineered to manage up to 1500 I/O points, making it an ideal core for medium-scale industrial automation. The CPU utilizes a robust 800 MHz architecture to execute complex control strategies with minimal latency. It is designed with modularity in mind, featuring dual slots for communication expansion and integrated networking capabilities that support modern Ethernet-based industrial protocols. This Sweden-built processor ensures data persistence through battery-buffered SRAM, providing a stable and reliable foundation for Distributed Control System (DCS) operations.

Core Architecture and Hardware Parameters

• Processor Frequency: 800 MHz High-Speed Clock

• Memory Configuration: 24 MB Controller Memory, 16 MB DRAM, and 8 MB battery-buffered SRAM

• I/O Capacity: Supports management of up to 1500 I/O points

• Network Interfaces: 4 x Integrated Ethernet ports for redundant communication

• Protocol Support: Native Modbus TCP and IEC 60870-5-104

• Expansion Capability: 2 Dedicated slots for Communication Interface Modules

• Storage: Built-in SD card support for data logging and firmware management

• Environmental Resistance: G3 compliant coating as standard for harsh atmosphere protection

• Power Requirements: External 24 V DC supply (Built-in power supply management)

• Software Requirement: Freelance 2013 or higher version mandatory

• Physical Profile: 23.7 x 15.2 x 9 cm | 1.08 kg

Industrial Automation Scenarios

The PM902F CPU module is a versatile controller utilized in sectors where high-speed logic and reliable network connectivity are non-negotiable:

• Process Industry Automation: Acting as the primary controller for chemical dosing, temperature regulation, and pressure monitoring in refining environments.

• Energy Management: Utilizing the IEC 60870-5-104 protocol for telecontrol and automated substation monitoring.

• Water and Wastewater Treatment: Managing distributed pump stations and filtration cycles via a centralized Freelance DCS network.

• Infrastructure Monitoring: Serving as a gateway for building management and large-scale HVAC systems using its quad-Ethernet redundancy.

• Food and Beverage: Coordinating high-speed assembly and packaging lines that require rapid I/O updates and robust data retention.