The ABB PM904F (3BDH001002R0001) is a high-performance central processing unit (CPU) module for the Freelance AC 900F distributed control system (DCS) . Its core function is to serve as the control system's primary processing engine, executing complex automation logic, managing communication with field I/O and higher-level systems, and enabling scalable control for mid-to-large industrial processes.
Item No :
PM904F 3BDH001002R00Order(MOQ) :
1Payment :
EXWProduct Origin :
GermanyShipping Port :
Wuhan, Hubei, ChinaLead Time :
3-5 daysWeight :
1.5kgProducts Description
ABB PM904F 3BDH001002R0001 Process Module for rack I/O in stock
| Model Number | PM904F 3BDH001002R0001 |
| Place of Origin | Sweden |
| Dimension/Weight | 11.5kg |
| Condition | New and Original |
| Warranty | 1 year |
| Shipping term | DHL Fedex TNT EMS UPS |
| Payment | TT / Western Union |
| Delivery time | 3-5 days |
| Service | 24 Hours Online Service |
Key Parameters
| Item | Specifications / Features |
|---|---|
| Product Type | Central Processing Unit (CPU) Module |
| System Platform | ABB Freelance AC 900F DCS |
| Processor | 800 MHz PowerPC (II Pro family) |
| Total Memory | 48 MB (16 MB battery-buffered SRAM, 32 MB DRAM) |
| Ethernet Ports | 4 x 10/100 Mbps (RJ45) for control network, redundancy, and Modbus TCP |
| Communication Slots | 4 slots for communication interface modules (e.g., PROFIBUS, CAN) |
| I/O Capacity | Supports up to 10 local S700 I/O modules; up to 1,500 I/O points |
| Redundancy | Supports hot-standby CPU redundancy for high availability |
| Power Supply | 24 V DC (19.2–32.5 V range) |
| Operating Temperature | -20°C to +70°C |
| Weight | Approx. 1.1 kg |
| Lifecycle Status | Active |
High-Performance Processing for Demanding Applications: The module's standout feature is its 800 MHz PowerPC processor. This delivers the computational power needed for fast logic execution, complex PID loops, and rapid task cycle times—configurable from 5 ms—making it suitable for demanding process control applications in power, oil & gas, and chemical plants .
Enhanced Communication and System Integration: The PM904F provides four Ethernet ports and four expansion slots for fieldbus communication modules (e.g., PROFIBUS, CAN) . It supports a wide range of industrial protocols, including Modbus TCP, IEC 60870-5-104, and PROFIBUS DP, ensuring seamless integration with existing plant equipment and higher-level SCADA/800xA systems .
High Availability with Redundancy and Hot-Swap Support: The PM904F can be configured for 1:1 hot-standby CPU redundancy, enabling bumpless automatic switchover in case of a failure to maintain continuous operation . Its hot-swappable design allows for online module replacement, significantly reducing system downtime .
The PM904F is used as a core control element in mission-critical automation across various industries:
Power Generation: Boiler and turbine control, balance of plant (BOP) systems .
Oil & Gas: Refinery process control, pipeline monitoring, and emergency shutdown (ESD) systems .
Chemical & Pharmaceutical: Batch reactor control and safety-critical logic .
Water & Wastewater: Large-scale pump station and filtration plant control .
Q1: What is the primary function of the PM904F?
A: It serves as the central processing unit for the ABB Freelance AC 900F DCS, executing control logic and managing communication with I/O modules and higher-level systems .
Q2: What is the key difference between the PM904F and the PM902F?
A: The PM904F is the "Plus" version, offering more power, four communication slots, and 48 MB of memory. The PM902F is a standard version with two communication slots .
Q3: What are the key memory specifications?
A: It has 48 MB of total memory, which includes 16 MB of battery-buffered SRAM for data retention during power loss .
Q4: Does the PM904F support redundancy?
A: Yes, it can be configured for 1:1 hot-standby CPU redundancy with bumpless transfer for high-availability applications .
Q5: What communication protocols are supported?
A: It supports Modbus TCP, IEC 60870-5-104, and PROFIBUS DP (via optional communication modules), and includes four onboard Ethernet ports .
Q6: Is the module hot-swappable?
A: Yes, it supports hot-swap replacement to minimize system downtime .
Q7: What software version is required for configuration?
A: A minimum of Freelance 2016 software is required, and Freelance 2019 is fully compatible with the PM904F .
Q8: What are the environmental specifications?
A: It operates in industrial environments at -20°C to +70°C and is compliant with G3 standards for harsh conditions .
The PM904F is part of the Freelance AC 900F controller family. Below are key related models and accessories:
| Product/Model | Type | Brief Description |
|---|---|---|
| PM904F | CPU Module | The featured high-performance "Plus" version with 4 communication slots and 48 MB memory . |
| PM902F | CPU Module | The standard version with 2 communication slots for mid-sized applications . |
| PM901F | CPU Module | A "lite" version with reduced memory and 3 Ethernet ports for basic control needs . |
| TD951F | Display Unit | An optional LCD display for local controller status and diagnostics . |
| CI930F | Communication Module | PROFIBUS DP communication interface module . |
| CI910F | Communication Module | CANopen/DeviceNet communication interface module . |
| AI810 / AO815 | I/O Modules | Analog input and output modules for integration with the PM904F . |
For demanding applications: The PM904F is the recommended choice, providing maximum performance, memory, and communication expansion .
For mid-sized control tasks: The PM902F offers a balanced solution with its standard CPU and memory configuration .
For remote/local monitoring: Consider the optional TD951F display unit for added diagnostic capability .
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