ABB PM901F
ABB PM901F
ABB PM901F

ABB PM901F | AC900F Distributed Control System CPU

  • Brand: ABB
  • Model: PM901F 07BDH000364R0001
  • Product Type: Distributed Control System (DCS) Controller Module
  • Series: Freelance AC900F
  • Core Function: Provides central processing for small-to-medium DCS applications, handling I/O scanning, logic execution, and communication with field devices.
  • Key Specs: 400 I/O point capacity, 3 built-in Ethernet ports, 2 serial ports, supports Modbus RTU/TCP, IEC 60870-5-101/104, redundant configuration.
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Part number: ABB PM901F
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Description

PM901F 07BDH000364R0001: Product Overview
The ABB PM901F is a compact, high-performance controller module designed for the Freelance AC900F Distributed Control System (DCS). Positioned as the “brain” of small-to-medium process automation systems, it manages all critical control tasks, including I/O data acquisition, logic execution, and communication with field devices (e.g., sensors, actuators, and remote I/O stations). Built for reliability and scalability, the PM901F is ideal for applications where deterministic control, ease of use, and cost-effectiveness are paramount—such as water treatment, food and beverage processing, and packaging machinery.
As part of the Freelance AC900F series, the PM901F leverages ABB’s modular DCS architecture, allowing seamless integration with S700 I/O modules, remote I/O stations, and third-party devices via standard industrial protocols. Its compact design (suitable for cabinet or DIN-rail mounting) and extensive built-in communication capabilities minimize the need for additional hardware, reducing both footprint and system cost. The module supports redundant configurations (e.g., dual power supplies or communication links) to ensure uninterrupted operation in critical processes, making it a robust choice for industries where downtime is costly.
PM901F 07BDH000364R0001: Technical Specifications
  • Model Number: PM901F 07BDH000364R0001
  • Manufacturer: ABB
  • Product Type: DCS Controller Module
  • Series: Freelance AC900F
  • I/O Capacity: Up to 400 I/O points (supports direct connection of S700 I/O modules)
  • Communication Ports: 3 built-in Ethernet ports (supports Modbus TCP, IEC 60870-5-104), 2 serial ports (supports Modbus RTU, IEC 60870-5-101)
  • Processor: High-speed RISC processor (optimized for real-time control)
  • Memory: Integrated program memory (for storing control logic) and data memory (for process variables)
  • Redundancy: Supports redundant power supplies and communication links (dual Ethernet/serial ports)
  • Operating Temperature: 0°C to +55°C (standard); -20°C to +70°C (with optional extended temperature kit)
  • Power Supply: 24 VDC (nominal), 19.2–28.8 VDC (operating range)
  • Mounting: DIN-rail or cabinet mounting (compatible with Freelance AC900F system cabinets)
  • Software Compatibility: Freelance Engineering (configuration tool), Freelance OS (operating system)

    ABB PM901F

    ABB PM901F

Core Features & Customer Value​
The PM901F’s design prioritizes usability, scalability, and reliability—three key pain points for automation engineers and plant managers.
First, its extensive built-in communication capabilities​ eliminate the need for additional gateway modules in most applications. The 3 Ethernet ports support Modbus TCP (for connecting HMIs, SCADA systems, or third-party controllers) and IEC 60870-5-104 (a standard for power system telecontrol), while the 2 serial ports handle Modbus RTU (for legacy devices) and IEC 60870-5-101 (for remote terminal units). This flexibility allows seamless integration with a wide range of field devices—from sensors and actuators to PLCs and SCADA systems—reducing engineering time and cost. For example, a water treatment plant can use the PM901F to connect Modbus RTU flow meters, Modbus TCP HMIs, and IEC 60870-5-104 SCADA systems without adding extra hardware.
Second, the 400 I/O point capacity​ (expandable via remote I/O stations) makes the PM901F suitable for both small standalone machines and medium-sized process lines. Unlike smaller PLCs that require multiple modules to handle the same number of I/O points, the PM901F’s integrated design simplifies wiring and reduces cabinet space. This scalability is critical for growing operations: a food and beverage plant can start with 100 I/O points for a packaging line and expand to 400 points as production increases, without replacing the controller.
Third, redundancy support​ ensures high availability in critical applications. The PM901F’s dual Ethernet/serial ports allow for redundant communication links (e.g., connecting to a backup HMI or SCADA system), while redundant power supplies prevent downtime from power failures. For example, a chemical plant can use the PM901F’s redundant configuration to maintain control of a reactor even if one communication link or power supply fails, minimizing the risk of product loss or safety incidents.
Fourth, ease of use​ is a key differentiator. The PM901F comes with ABB’s Freelance Engineering software, which provides a graphical interface for configuring I/O, programming logic (using ladder logic, function blocks, or structured text), and monitoring system performance. The module’s built-in LCD screen (on some models) allows engineers to view real-time data (e.g., CPU load, I/O status) and make adjustments without a laptop, reducing downtime during maintenance.
Finally, cost-effectiveness​ is achieved through the PM901F’s compact design and integrated features. By eliminating the need for extra gateways, power supplies, or mounting hardware, the module reduces both initial purchase costs and long-term maintenance expenses. This makes it an attractive option for budget-conscious plants that still require reliable, scalable control.

ABB PM901F

ABB PM901F

Typical Applications​
The PM901F is widely used in small-to-medium process automation applications​ where deterministic control, scalability, and reliability are essential. Some common industries and use cases include:
  1. Water and Wastewater Treatment: The PM901F controls pumps, valves, and sensors in treatment plants, ensuring consistent water quality and flow. For example, it can monitor pH levels, control chemical dosing, and manage pump operation based on water level sensors—all while communicating with a SCADA system for remote monitoring.
  2. Food and Beverage Processing: The module handles packaging line control, including conveyor belts, fillers, and cappers. Its Modbus TCP support allows integration with HMIs for operator interaction, while redundant configuration ensures uninterrupted production during peak hours.
  3. Packaging Machinery: The PM901F controls robotic arms, labelers, and sealers in packaging lines, ensuring precise timing and alignment. Its 400 I/O capacity supports multiple machine sections, while the built-in communication ports allow for easy integration with MES systems for production tracking.
  4. Chemical and Petrochemical: The module controls reactors, valves, and pumps in chemical processes, maintaining temperature, pressure, and flow within safe limits. Its IEC 60870-5-104 support allows for telecontrol from a central control room, while redundant power supplies prevent downtime in hazardous environments.
  5. Power Generation: The PM901F controls auxiliary systems in power plants, such as cooling water pumps, fuel feeders, and exhaust fans. Its Modbus RTU support allows integration with legacy devices, while the compact design fits into tight cabinet spaces in power generation facilities.

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