
Product Overview
The ABB PM591-ARCNET (Part Number: 1SAP150100R0260) is a high-performance CPU Processor Unit from the ABB AC500 PLC series. It is designed for advanced industrial automation systems requiring deterministic ARCNET communication, high-speed processing, and flexible expansion capabilities.
The processor integrates 4 MB user program memory, 3584 kB user data memory, an ARCNET communication interface, dual RS232/RS485 serial communication ports, a FieldBusPlug (FBP) interface, an SD card slot, and an integrated LCD display with function keys. Its compact DIN rail design makes it suitable for machine automation, process control, and distributed industrial control applications.
Technical Specifications
| Parameter |
Specification |
| Manufacturer |
ABB |
| Model |
PM591-ARCNET |
| Part Number |
1SAP150100R0260 |
| Product Type |
CPU Processor Unit |
| PLC Series |
AC500 |
| User Program Memory |
4 MB (4096 kB) |
| User Data Memory |
3584 kB |
| Total Memory |
7680 kB |
| Communication Interface |
ARCNET |
| Serial Communication |
2 × RS232 / RS485 |
| FieldBusPlug (FBP) Interface |
Supported |
| Memory Expansion |
SD Card Slot |
| Display |
Integrated LCD Display with Function Keys |
| Controller Processing Time |
0.000002 ms |
| Supply Voltage |
20.4–28.8 V DC |
| Rated Voltage |
24 V DC |
| Protection Rating |
IP20 |
| Mounting Method |
DIN Rail |
| Dimensions |
62 × 76 × 67.5 mm |
| Weight |
0.16 kg |
Function and Working Principle
The PM591-ARCNET serves as the central processor of an ABB AC500 automation system. It continuously acquires input signals from field devices, executes the PLC application program, processes control algorithms, and updates outputs with high-speed performance.
Its integrated ARCNET interface provides deterministic communication for distributed automation systems. The dual RS232/RS485 serial ports enable communication with drives, intelligent instruments, HMIs, and other industrial devices. The FieldBusPlug (FBP) interface supports additional communication modules, while the SD card slot provides storage for application programs, firmware updates, and system backups.
Operating Sequence
- Field devices send input signals to the processor.
- The CPU scans and processes incoming data.
- PLC logic is executed according to the application program.
- Output commands are transmitted to connected equipment.
- Data is exchanged through ARCNET and serial communication networks.
Key Features
- High-performance AC500 CPU processor
- 4 MB user program memory
- 3584 kB user data memory
- ARCNET communication interface
- Dual RS232 / RS485 serial communication
- FieldBusPlug (FBP) communication support
- SD card slot for application storage and backup
- Integrated LCD display with function keys
- High-speed processing performance
- Compact DIN rail installation
System Role
The PM591-ARCNET functions as the central processing unit within an ABB AC500 automation system, managing PLC execution, communication, distributed I/O control, and real-time industrial processes.
Typical System Architecture
Sensors → PM591-ARCNET CPU Processor Unit → ARCNET / Serial Network → HMI / SCADA → Actuators
Industrial Applications
The PM591-ARCNET is widely used in:
- Factory automation
- Process automation
- Machine control
- Packaging machinery
- Material handling systems
- Water and wastewater treatment
- Power distribution systems
- Building automation
- OEM equipment
- Distributed industrial control systems
Installation Guidelines
- Install the processor on a standard DIN rail.
- Connect a regulated 24 V DC power supply.
- Wire field devices according to the control system design.
- Configure ARCNET and serial communication parameters.
- Download the PLC application before commissioning.
- Verify communication and I/O operation during startup.
Compatible Components
The PM591-ARCNET is compatible with:
- ABB AC500 I/O Modules
- ABB Communication Modules
- ABB FieldBusPlug (FBP) Modules
- ABB Human Machine Interface (HMI) Panels
- SCADA Systems
- ARCNET Network Devices
- RS232 / RS485 Serial Devices
- ABB Automation Builder Software
Alternative Models
| Model |
Description |
| PM591-2ETH |
CPU Programmable Logic Controller |
| PM590-ARCNET |
CPU Processor Unit |
| PM590-ETH |
Controller |
| PM585-ETH |
CPU Programmable Logic Controller |
| PM583-ETH |
CPU Programmable Logic Controller |
Advantages
- High-speed PLC execution
- 4 MB user program memory
- Deterministic ARCNET communication
- Flexible serial communication interfaces
- Expandable through FBP communication modules
- SD card support for storage and backup
- Integrated LCD diagnostics
- Compact and durable industrial design
- Reliable performance in demanding automation applications
Frequently Asked Questions
What is the PM591-ARCNET used for?
It is used as a CPU Processor Unit for industrial automation, machine control, and distributed process control systems.
How much memory does the processor provide?
The processor provides 4 MB user program memory and 3584 kB user data memory.
Which communication interfaces are available?
It supports ARCNET communication, two RS232/RS485 serial communication ports, and FieldBusPlug (FBP) communication expansion.
Does it support memory expansion?
Yes. The integrated SD card slot supports application storage, firmware upgrades, and data backup.
How is the processor installed?
The PM591-ARCNET is designed for DIN rail mounting and operates from a 24 V DC power supply.
Conclusion
The ABB PM591-ARCNET (1SAP150100R0260) CPU Processor Unit is a powerful controller in the ABB AC500 PLC family. Featuring 4 MB user program memory, 3584 kB user data memory, ARCNET communication, dual RS232/RS485 interfaces, FieldBusPlug expansion, an SD card slot, and an integrated LCD display, it delivers reliable processing performance, deterministic network communication, and scalable control for demanding industrial automation and distributed control applications.