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Phone: +86 16626708626Description
Core Product Summary
The ABB PM803F, designated PM 803F under order number 3BDH000530R1, is the CPU base unit of an AC 800F controller in the Freelance distributed control system. It executes the control application and exchanges process signals through installed fieldbus modules. The unit combines the controller housing and CPU platform with 16 MB of battery-buffered RAM, four fieldbus-module slots and two Ethernet communication-module slots.
Its modular architecture requires the power supply and communication interfaces to be selected as part of the controller assembly. Supported companion components include SA 811F or SD 812F power supplies and the EI 813F Ethernet module. The base unit is specified without an operating system; this is loaded during software installation. Freelance V7.1SP2a or higher is required, making software compatibility and the installed module arrangement important identification points alongside the PM803F model number.
Key Technical Specifications
| Parameter | Verified Specification |
|---|---|
| Manufacturer | ABB |
| Model designation | PM 803F / PM803F |
| Order number | 3BDH000530R1 |
| Product type | CPU base unit |
| Controller family | AC 800F |
| Control-system platform | Freelance DCS |
| Application RAM | 16 MB, battery-buffered |
| Processor architecture | 32-bit superscalar RISC |
| Fieldbus expansion | Four fieldbus-module slots |
| Ethernet expansion | Two Ethernet communication-module slots |
| Memory backup monitoring | Battery backup with battery watchdog |
| Contact ledge | RW 855F |
| Operating-system installation | Loaded during software installation |
| Minimum software requirement | Freelance V7.1SP2a |
| AC power-supply option | SA 811F, 115/230 VAC |
| DC power-supply option | SD 812F, 24 VDC |
| Operating ambient temperature | 0°C to +60°C, AC 800F system specification; no forced cooling required |
The slot counts and software requirements apply to the PM 803F base unit. The operating-temperature statement is the AC 800F controller-system rating.
Engineering Selection Highlights
- AC 800F CPU base unit → select it within a Freelance AC 800F controller assembly, rather than treating the model as a complete preconfigured controller station.
- 16 MB battery-buffered RAM → include the memory-backup arrangement and battery monitoring in the controller maintenance plan.
- Four fieldbus-module slots → allocate the required fieldbus interfaces before finalizing the controller hardware configuration.
- Two Ethernet communication-module slots → Ethernet connectivity depends on the installed interface modules, not simply on the base-unit designation.
- Separate AC or DC power-supply modules → match the SA 811F or SD 812F selection to the cabinet supply.
- Operating system loaded during installation → include software installation and application loading in commissioning scope.
- Freelance V7.1SP2a minimum requirement → align the engineering environment with the base unit’s documented software dependency.
PM803F
PM803F
Detailed Product Overview
Distinguish the CPU base from the complete controller
PM803F identifies the central base unit, not the complete list of components needed for an operating AC 800F station. The base provides the CPU platform and expansion positions, while separate modules supply power, Ethernet connectivity and fieldbus communication. This distinction matters for procurement: two assemblies containing the same PM803F can have different supply requirements and different network capabilities because their installed modules differ.
The four fieldbus positions allow the controller’s communication arrangement to follow the process architecture. Ethernet modules occupy separate positions, so control-network connectivity and fieldbus connectivity are distinct parts of the hardware specification. A complete assembly description should therefore identify the base unit, power supply, Ethernet interfaces and fieldbus interfaces individually.
Treat memory retention and software loading separately
The PM803F has 16 MB of battery-buffered RAM and battery-watchdog monitoring. This provides a documented memory-backup arrangement, but it does not remove the software-installation requirement. The base-unit order is specified without an operating system, which must be loaded during installation. The engineering environment must also meet the minimum Freelance V7.1SP2a requirement.
These are separate integration considerations: the memory hardware supports retention, while the operating system and application establish what the controller executes. Identifying the correct hardware therefore does not by itself establish that an assembled station has the required software or application configuration.
Select communication capability at the module level
The AC 800F supports PROFIBUS-DPV1, FOUNDATION Fieldbus HSE, Modbus, telecontrol and CAN-based Freelance Rack I/O through its modular communication architecture. The presence of a PM803F does not mean all of those physical interfaces are present. Protocol selection must be tied to the installed communication module and the configured project.
Freelance Engineering handles fieldbus-line and field-device configuration within the control-system engineering environment. This connects controller hardware selection with device parameterization: a suitable CPU base, the correct communication interface and the engineering configuration are all parts of the same integration task.
Applications & System Role
The PM803F performs the application-processing role in an AC 800F process station. It acquires signals from fieldbus-connected devices through the appropriate communication modules, processes those signals according to the loaded application and sends resulting commands back through the fieldbus interfaces.
A technical-fit scenario is a Freelance control station requiring several fieldbus types within one controller assembly. The AC 800F architecture supports different fieldbus technologies simultaneously, subject to the installed modules and project configuration. It also supports optional controller redundancy; redundancy is a configured system arrangement rather than an attribute supplied by one PM803F base unit alone.
System Compatibility & Integration Requirements
| Item / Dependency | Verified Compatibility or Requirement | Practical Note |
|---|---|---|
| Controller architecture | ABB AC 800F | PM803F provides the CPU base for the controller. |
| Control-system environment | ABB Freelance | Engineering and commissioning take place within the Freelance environment. |
| Minimum software | Freelance V7.1SP2a or higher | The minimum version is a base-unit integration requirement. |
| AC supply module | SA 811F | Provides the 115/230 VAC supply option for PM803F. |
| DC supply module | SD 812F | Provides the 24 VDC supply option for PM803F. |
| Ethernet module | EI 813F, 10BaseT | Adds the corresponding physical Ethernet interface. |
| Fieldbus interfaces | AC 800F fieldbus modules | Protocol capability depends on the selected modules and configuration. |
| Fieldbus configuration | Freelance Engineering Tool | Configures fieldbus lines and connected field devices. |
| Operating system | Loaded during software installation | The base-unit order is specified without an operating system. |
| Contact ledge | RW 855F | Forms part of the documented PM803F base-unit arrangement. |
AC 800F fieldbus options include PROFIBUS-DPV1, FOUNDATION Fieldbus HSE, Modbus, telecontrol and CAN for Freelance Rack I/O. These are modular system capabilities, not a statement that every interface is built into the PM803F.
Dimensions, Mounting & Connection Notes
The PM803F uses the AC 800F modular base arrangement, with separate positions for the power supply, Ethernet modules and fieldbus modules. The CPU platform serves as the backplane for the installed components.
AC 800F controllers support DIN-rail mounting. The PM803F configuration includes the RW 855F contact ledge; power and network connections are determined by the installed supply and communication modules. Consequently, a cabinet layout and connection schedule must identify the full module population rather than the CPU base alone.
FAQ
What is the ABB PM803F?
The ABB PM803F is the CPU base unit of an AC 800F controller used in the Freelance DCS. Its order number is 3BDH000530R1.
How much RAM does the PM803F have?
It has 16 MB of battery-buffered RAM. The documented backup arrangement includes battery-watchdog monitoring.
How many communication-module slots are available?
The base unit provides four fieldbus-module slots and two Ethernet communication-module slots. These accommodate separate interfaces selected for the controller application.
Does the PM803F include every supported fieldbus interface?
No. AC 800F fieldbus capability depends on the installed communication modules. Supported system options include PROFIBUS-DPV1, FOUNDATION Fieldbus HSE, Modbus, telecontrol and CAN for Freelance Rack I/O.
Which power supplies are specified for PM803F?
The documented options include the SA 811F for 115/230 VAC and the SD 812F for 24 VDC. The power-supply module is selected separately from the CPU base.
Does the base unit come with an operating system?
The base-unit order is specified without an operating system. The operating system is loaded during software installation.
What is the minimum Freelance software version?
Freelance V7.1SP2a or higher is required for PM803F.
Can a PM803F-based controller be used in a redundant system?
Yes. The AC 800F architecture supports optional controller redundancy. Redundant operation requires the corresponding system hardware and configuration; one base unit alone does not constitute a redundant controller arrangement.
