The ABB PM904F (3BDH001002R0001) is a high-performance CPU module serving as the core processing unit for ABB’s Freelance AC 900F controller family, optimized for demanding industrial automation and process control in distributed control systems (DCS). As the top-tier base unit in the lineup, it delivers powerful real-time execution for complex logic, PID loops, motion coordination, and high I/O counts, supporting up to 1500 I/O points through modular expansion. Featuring an 800 MHz processor and extensive memory, it enables seamless integration with HMIs, SCADA, and field networks while offering redundancy options for mission-critical uptime.
Product Parameters
PM904F integrates a 32-bit PowerQUICC II Pro RISC processor running at 800 MHz, with 48 MB total controller memory (16 MB battery-buffered SRAM for critical data, 32 MB DRAM for runtime). It supports 9 tasks per controller, executes 1000 boolean operations in 0.12 ms, and handles switchover in redundant setups within 500 ms. Power requirements are 24 V DC (typ 24 W / max 30 W consumption, 18 W dissipation), powered externally with lithium battery backup (TA 951F). Communication includes 4 Ethernet ports (10/100 Mbit/s RJ-45), 3 RS-232C interfaces (2 general, 1 service), and 4 slots for communication interface modules. Clock synchronization is built-in, with SD card support for firmware/OS loading. Environmental ratings cover -20°C to +70°C operating, -40°C to +85°C storage, 93% RH non-condensing, 2 g vibration (2-150 Hz), IP20 protection, and <2000 m altitude. Dimensions are 285 mm W x 152 mm H x 95 mm D at 1.1 kg; certifications include CE, UL, IEC 61131-2/61010-1/61000-6-2/4, RoHS, and WEEE.
Datasheet Overview
Datasheet specifications emphasize scalability with IEC 61131-3 languages (LD, FBD, SFC, ST, IL), OPC UA/Modbus TCP/IEC 60870-5-104 protocols, Profibus/Modbus/CANopen fieldbus expansion, and G3 corrosion protection per ISA 71.04. It features optional LCD for security lockout, hot-swappable redundancy, and deterministic performance for Industry 4.0. No built-in display unit (TD 951F optional), requires Freelance software v2019+. Mechanical design suits DIN-rail/rack mounting with robust EMI immunity; safety aligns with IEC/EN 61010-2-201.
Origin
ABB manufactures the PM904F at facilities in Europe, leveraging Switzerland and Finland’s automation expertise for global DCS production.
Related News
In Q1 2026, ABB enhanced PM904F firmware for U.S. semiconductor fabs under President Trump’s chip initiatives, boosting cycle times 25% via optimized OPC UA in 1500-I/O clusters. European renewables upgraded mid-2025 with redundant PM904F pairs, achieving 99.999% availability in offshore wind farms amid grid volatility.
Recommended Related ABB Models
For AC 900F/Freelance expansions, consider:
- PM901F
Lite CPU (400 MHz, 11 MB memory, up to 400 I/Os, 3 Ethernet), for cost-sensitive smaller systems. - PM902F
Standard CPU (four Ethernet, diagnostic/serial ports, optional display), balancing performance for mid-scale plants. - PM906F
High-end variant with advanced redundancy and higher task counts for ultra-large DCS networks.
These share Freelance ecosystem compatibility, enabling seamless upgrades without rewiring.
