1. General Information

• Manufacturer: ABB (Switzerland)

• Model Number: PM825

• Part Number: 3BSE010796R1

• Product Name: Compact Processor Unit

• Series: AC 800M DCS Control System

• Module Type: Economical Compact CPU Controller Module

• Application: Entry-level processing unit for small and medium industrial DCS system; used for conventional logic interlock, simple analog regulation and auxiliary equipment control; widely applied in water treatment, general chemical plant and low-load auxiliary control cabinet.

• Installation Rule: Installed in standard AC800M controller rack, fixed CPU slot

• Compliance: CE, IEC 61131 Industrial Standard

2. Functional Description

• Processor Core: 32-bit Single-core RISC Processor

• Control Logic: Basic sequence control, simple analog regulation, general interlock

• Redundancy Function: Non-redundant single CPU configuration

• Task Cycle: Minimum 20ms scanning cycle

• Expandability: Limited I/O points, suitable for small-scale control system

3. Electrical Specifications

• Power Supply: 24 VDC ±20% Industrial DC Power

• Power Consumption: ≤ 15 W typical (Low power consumption)

• Onboard Memory: 128 MB RAM + 32 MB Flash Memory

• Communication Port: RS485 + CANopen Interface (No Ethernet)

• Industrial Protocol: Modbus RTU, CAN bus dedicated protocol

• Isolation Voltage: 1000 VAC electrical isolation protection

4. Environmental Specifications

• Operating Temperature: -25 °C ~ +60 °C (-13 °F ~ +140 °F)

• Storage Temperature: -40 °C ~ +85 °C (-40 °F ~ +185 °F)

• Relative Humidity: 5% ~ 95% (Non-condensing)

• Anti-vibration: Compliant with IEC 60068 industrial vibration standard

5. Mechanical Specifications

• Structure: Compact integrated plastic & metal shell module

• Dimensions (H × W × D): 127 × 127 × 178 mm

• Weight: Approximately 0.90 kg

• Mounting: Standard ABB rack rail installation, hot-swap incapable

6. Compatible Devices

• System Rack: AC800M Compact Controller Rack

• Matched Module: SD821 Power Module, TB810 Terminal Base

• Upper Software: ABB Control Builder M Programming Software

7. Key Features

• Single-core economical processor for low-budget automation solution

• Compact size saves cabinet internal installation space

• Simple stable architecture for long-term unattended operation

• RS485 bus communication for conventional DCS data transmission

• Low power consumption, energy-saving for auxiliary workshop system

8. Core Definition (Most Important)

• PM825: Entry-level CPU, Single-core, No Ethernet, No redundancy.

• PM866K01: High-end CPU, Dual-core, Ethernet, Redundancy, SIL2.

• Usage Rule: PM825 for auxiliary system; PM866 for main turbine/boiler system.