Description
Product Overview
ABB PM891 (3BSE053240R1) is the core processor module of the ABB AC800M controller family for ABB Ability System 800xA DCS platform. This integrated CPU unit incorporates processing core, memory, real-time clock, SD card interface and onboard communication ports. It executes control logic, sequence programs and handles data exchange with I/O modules, fieldbus devices and operator stations. Widely deployed in power plants, petrochemical, pulp & paper, metallurgy and water treatment industries, supporting redundant controller configuration for high availability critical process control applications.
Technical Specifications
| Parameter | Details |
|---|---|
| Part Number | 3BSE053240R1 |
| Model | PM891 |
| Brand | ABB |
| Type | AC800M Processor / CPU Module |
| Compatible System | ABB System 800xA, AC800M Controller |
| Memory | 64MB RAM, 128MB Flash |
| Onboard Ports | 2 × RJ45 Ethernet, 1 × Isolated COM4 Serial Port |
| Expansion Bus | CEX-Bus for communication module expansion |
| I/O Interface | Optical Modulebus for S800 I/O clusters |
| Programming Standard | IEC 61131-3 |
| Programming Tool | Control Builder M |
| Redundancy | Supports CPU hot standby redundancy |
| Operating Temperature | 0°C ~ +60°C |
| Storage Temperature | -25°C ~ +70°C |
| Humidity | 5~95% RH, non-condensing |
| Mounting | DIN rail rack mount |
| Dimensions | 128 × 240 × 105 mm |
| Net Weight | 1.2 kg |
| Certifications | CE, UL, SIL2 capable |
Key Features
- Integrated all-in-one controller design with CPU, memory, RTC and SD card slot
- Dual Ethernet ports for redundant control network communication
- Isolated COM4 serial port for local commissioning and diagnostics
- CEX-Bus expansion interface to add PROFIBUS, FF and other communication modules
- Optical Modulebus supporting up to 7 clusters of S800 remote I/O
- Full hot-swap capability for redundant CPU pair without process shutdown
- Comprehensive self-diagnostics with front panel LED indicators for status and fault alarm
- IEC61131-3 standard programming, supports Function Block, Ladder Diagram and Structured Text
Installation & Testing Notes
- Install PM891 on DIN rail inside AC800M control cabinet, match rack slot layout
- Connect control network Ethernet cables and optical Modulebus to S800 I/O
- Insert SD card for program backup; set unique hardware IP address
- Power up the rack, verify front panel LED status and run hardware self-test
- Download control project via Control Builder M and verify program execution
- For redundant pair setup, synchronize data between primary and standby controller
- Hot swap available only in redundant configuration; confirm standby CPU healthy before replacement
- Perform full loop test with I/O modules to validate control logic after commissioning
FAQ
Q: What DCS system is PM891 3BSE053240R1 used for? A: ABB System 800xA DCS, AC800M controller platform.
Q: Does PM891 support redundant controller configuration? A: Yes, it supports CPU hot standby redundancy for high availability applications.
Q: What I/O system does it connect to? A: S800 I/O via optical Modulebus.
Q: Can the PM891 be hot swapped? A: Hot swap is supported under redundant CPU configuration. Non-redundant single CPU must power down before removal.
Start Chat
Send an Email
