ABB AC500 200-PSMG Power Supply Module

Technical Dossier

Product Details And Specifications

ABB AC500 Series Technical Notes

The ABB AC500 series is a modular programmable logic controller (PLC) platform deployed across heavy industrial sectors including petrochemical refineries, nuclear power auxiliary systems, offshore oil & gas platforms, and large-scale water treatment facilities. With installations spanning more than 80 countries, the AC500 platform represents one of ABB's highest-volume automation controller families. The 200-PSMG is a dedicated power supply module within this ecosystem, providing regulated DC power to the CPU and I/O backplane under demanding continuous-duty conditions.

The Evolution of AC500 Architecture

The AC500 platform was introduced by ABB in the early 2000s as a successor to the CS31 and Advant Controller 31 (AC31) families. The architecture underwent three major generational transitions:

Generation 1 (AC500 V1, ~2003–2008): Initial modular design based on the PM571/PM581 CPU modules. Communication was limited to PROFIBUS-DP and Modbus RTU. Power supply modules in this generation used a proprietary backplane bus with limited hot-swap capability.

Generation 2 (AC500 V2, ~2009–2016): Introduced the PM590/PM591/PM592/PM595 CPU range with expanded memory and Ethernet-based fieldbus support (PROFINET, EtherNet/IP). The 200-series power supply modules, including the 200-PSMG, were standardized in this generation to support the expanded I/O backplane configurations (TB511, TB521, TB541).

Generation 3 (AC500 V3 / AC500-eCo / AC500-S, ~2017–present): Introduced safety-rated variants (AC500-S, TÜV-certified SIL 3 / PLe), extended temperature range modules (AC500-XC for -40°C to +70°C), and IEC 61131-3 programming via Automation Builder 2.x. Legacy 200-series power supply modules retain backward compatibility with V2 backplanes but are not forward-compatible with the new TB560/TB580 backplane form factor introduced in V3.

Compatibility note: The 200-PSMG is designed for use with TB511-ETH, TB521-ETH, and TB541 terminal base units. It is not compatible with the AC500-eCo compact CPU series (PM554/PM556) which use integrated power supply circuits.

AC500 Full Catalog & Functionalities (SKU List)

Power Supply Modules

• 200-PSMG: 24 VDC input power supply module for AC500 V2 backplane; supports TB511/TB521/TB541 terminal bases.
• 200-PSMG-2: Redundant power supply module for AC500 V2; dual-feed configuration for high-availability applications.
• 200-PSMG-XC: Extended temperature variant of 200-PSMG; rated -40°C to +70°C for harsh environment deployment.

CPU Modules

• PM571-ETH: Entry-level CPU, 256 KB program memory, onboard Ethernet, supports up to 2 I/O modules.
• PM581-ETH: Mid-range CPU, 1 MB program memory, dual Ethernet ports, supports up to 7 I/O modules.
• RFQ terms review: Commercial terms are confirmed during RFQ review based on model, condition, documentation, quantity and destination.
• PM591-ETH: Enhanced PM590 with expanded data memory; standard in V2 generation deployments.
• PM592-ETH: Top-tier V2 CPU, 8 MB program memory, dual redundant Ethernet, SD card slot for program backup.
• PM595-ETH: Flagship V2 CPU; 16 MB program memory, supports up to 14 I/O modules, IEC 61850 communication option.

Digital Input (DI) Modules

• DC532: 16-channel 24 VDC digital input module; 0.2 ms input filter; standard DIN rail mount.
• DC505-FBP: 8 DI / 8 DO combined module with PROFIBUS-DP fieldbus coupler integration.
• DI524: 16-channel 120/230 VAC digital input module; for direct AC field signal connection.

Digital Output (DO) Modules

• DO526: 16-channel 24 VDC transistor output module; 0.5 A per channel; short-circuit protected.
• DO531: 8-channel relay output module; 250 VAC / 2 A per channel; for high-voltage switching applications.

Analog Input (AI) Modules

• AI523: 8-channel analog input module; 0–10 V / 0–20 mA / 4–20 mA selectable; 12-bit resolution.
• AI531: 4-channel RTD/thermocouple input module; supports Pt100, Pt1000, Ni100, Type J/K/T thermocouples.

Communication Adapter Modules

• CI501-PNIO: PROFINET IO device adapter; connects AC500 I/O stations to PROFINET controller networks.
• CI502-PNIO: PROFINET IO controller adapter; enables AC500 CPU to act as PROFINET master.
• CI504-PNIO: PROFINET IRT (isochronous real-time) adapter; for motion control and time-critical applications.
• CI590-CS31-HA: CS31 high-availability communication adapter; bridges legacy CS31 I/O networks to AC500 backplane.

Sourcing Hard-to-Find & Obsolete AC500 Parts

Q: How are RFQ terms confirmed?
A: Quantity, required condition, documentation needs, destination and sourcing route are confirmed during RFQ review before quotation.

Quality Control for the AC500 Range

AC500 modules, particularly power supply and communication adapter variants, require specialized test procedures due to their backplane bus architecture and multi-voltage internal circuitry. DriveKNMS applies the following test protocol to all AC500 inventory:

• Backplane Bus Integrity Test: Each module is seated in a live TB511 or TB521 terminal base and subjected to a full backplane communication cycle to verify CS31 internal bus signaling at 187.5 kbps.
• Power Rail Verification: For power supply modules including the 200-PSMG, output voltages on the 5 VDC logic rail and 24 VDC field power rail are measured under rated load conditions using calibrated electronic load equipment.
• Firmware Version Audit: CPU modules are connected via USB programming cable and Automation Builder software to confirm firmware version, program memory integrity, and communication port functionality.
• Visual and Mechanical Inspection: Connector pins, backplane edge connectors, and housing integrity are inspected under 10× magnification. Modules with bent pins, cracked housings, or corroded contacts are rejected.