PM861AK01 ABB System 800xA Redundant Controller Module 3BSE018157R1

PM861AK01 Classic Controller Module – Reliable Redundant Control for 800xA Systems

PM861AK01 is a classic CPU board for ABB System 800xA. It brings high availability through CPU redundancy. Therefore, the module handles process control with speed and stability. Moreover, you get simple fault diagnosis, modular growth, and full EMC certification. Built for industrial automation, this controller supports Ethernet, PROFIBUS DP, and S800 I/O. Consequently, it suits applications that demand uptime and clear maintenance.

Brand: ABB
Model: PM861AK01
Series: System 800xA
Type: Controller CPU Module

Core Performance and Memory

• Article number: 3BSE018157R1
• Life cycle status: Classic
• Redundancy: Yes (CPU, CEX-Bus, communication, S800 I/O)
• High Integrity: No
• Processor type: MPC860
• Clock frequency: 48 MHz
• Performance, 1000 boolean operations: 0.23 ms
• Memory: 16 MB total
• RAM available for application: 7.155 MB
• Flash memory for storage: Yes (2 MB for firmware)

Redundancy and Application Capacity

• Switch over time in redundant config: max 10 ms
• Applications per controller: 32
• Programs per application: 64
• Diagrams per application: 128
• Tasks per controller: 32
• Cycle time per application program: down to 1 ms

Power and Clock Synchronization

• Power supply: 24 V DC (19.2 – 30 V DC)
• Power consumption +24 V: typ. 250 mA / max 430 mA
• Power dissipation: typ. 6.0 W (max 10.3 W)
• Redundant power supply status input: Yes
• Built-in back-up battery: Lithium, 3.6 V
• Clock synchronization: 1 ms between AC 800M controllers (CNCP protocol)

Event Handling and Bus Capacity

• Event queue per OPC client: Up to 3000 events
• Transmission speed to OPC server: 36–86 events/sec, 113–143 data messages/sec
• Communication modules on CEX bus: 12
• Supply current on CEX bus: max 2.4 A

Modulebus and I/O Capacity

• I/O clusters on Modulebus (non-red. CPU): 1 electrical + 7 optical
• I/O clusters on Modulebus (red. CPU): 0 electrical + 7 optical
• I/O capacity on Modulebus: max 96 (single PM861A) or 84 (red. PM861A) modules
• Modulebus scan rate: 0–100 ms (depends on I/O count)
• Supply current on electrical Modulebus: 24 V: max 1.0 A; 5 V: max 1.5 A

Network and Serial Interfaces

• Ethernet channels: 2 (RJ45, IEEE 802.3, 10 Mbit/s)
• Control Network protocol: MMS and IAC
• Recommended Control Network backbone: 100 Mbit/s switched Ethernet
• Real-time clock stability: 100 ppm (approx. 1 h/year)
• RS-232C interface: 2 (one general, one for service tool)
• COM3 (non-red. only): RS-232C, 75–19 200 baud, RJ45, not opto isolated, full RTS-CTS
• COM4 (non-red. only): RS-232C, 9 600 baud, RJ45, opto isolated, no RTS-CTS

Environmental Tolerance and Immunity

• Temperature, operating: +5 to +55 °C (+41 to +131 °F)
• Temperature, storage: -40 to +70 °C (-40 to +158 °F)
• Temperature changes: 3 °C/min according to IEC/EN 61131-2
• Pollution degree: Degree 2 per IEC/EN 61131-2
• Corrosion protection: G3 compliant to ISA 71.04
• Relative humidity: 5 to 95 %, non-condensing
• Emitted noise: < 55 dB
• Vibration: 10–50 Hz: 0.0375 mm amplitude; 50–150 Hz: 0.5 g; 5–500 Hz: 0.2 g
• Rated isolation voltage: 500 V a.c.
• Dielectric test voltage: 50 V
• Protection class: IP20 per EN 60529, IEC 529
• Altitude: 2000 m per IEC/EN 61131-2
• Emission & Immunity: EN 61000-6-4, EN 61000-6-2
• Environmental conditions: Industrial
• CE Mark: Yes
• Electrical Safety: EN 50178, IEC 61131-2, UL 508
• Hazardous location: UOL 60079-15
• Marine certificates: ABS, BV, DNV-GL, LR (PM861AK01, PM861AK02)
• TUV Approval: No
• RoHS compliance: –
• WEEE compliance: DIRECTIVE/2012/19/EU

Dimensions and Weight

• Width: 196 mm (7.3 in.)
• Height: 119 mm (4.7 in.)
• Depth: 135 mm (5.3 in.)
• Weight (including base): 1200 g (2.6 lbs)

Installation Guide

• Use the unique slide & lock mechanism for DIN rail mounting.
• Attach or detach the base plate quickly without tools.
• Find the Ethernet address label on the TP830 base plate.
• Each CPU has a hardware identity via a unique Ethernet address.
• Connect CN1 and CN2 to the Control Network.
• Use COM3 for general RS-232C with modem control.
• Use COM4 for a configuration tool (opto isolated).
• IP20 protection means no enclosure is required.

Commissioning and Maintenance

• Configure the controller with 800xA Control Builder.
• Redundancy support gives higher availability.
• Simple fault diagnosis procedures reduce downtime.
• Modular design allows step-by-step expansion.
• Sectioned CEX-Bus using a pair of BC810.
• Built-in redundant Ethernet ports simplify wiring.

Compatibility Notes

• Works with ABB System 800xA control builder.
• Supports S800 I/O and PROFIBUS DP.
• Communicates via MMS and IAC protocols.
• Optimized for 100 Mbit/s switched Ethernet.
• Redundant CPU, CEX-Bus, and communication interfaces.
• Ideal for industrial environments with high EMC needs.

Certifications and Standards

• CE Mark: Yes
• Electrical safety: EN 50178, IEC 61131-2, UL 508
• Hazardous location: UOL 60079-15
• Marine: ABS, BV, DNV-GL, LR (PM861AK01, PM861AK02)
• Emission & immunity: EN 61000-6-4, EN 61000-6-2
• Protection class: IP20 per EN 60529, IEC 529
• WEEE: DIRECTIVE/2012/19/EU
• Corrosion: G3 compliant to ISA 71.04

Package Contents

• 1 x PM861AK01 CPU module
• 1 x TP830 base plate
• Documentation and certificates as applicable
• Weight including base: 1200 g (2.6 lbs)

Warranty and Shipping

• Warranty: 12 months
• Dispatch time: 12–24 hours
• Courier options: FedEx, UPS, DHL
• Fast global delivery from stock.

Expert Review

The PM861AK01 is a proven workhorse for ABB 800xA systems. Its redundant design and 10 ms switchover time keep processes running. The MPC860 processor handles 0.23 ms boolean operations. Memory is modest (16 MB), but adequate for most control tasks. The built-in Ethernet ports and RS-232C interfaces reduce extra hardware. For engineers who value stability and simple fault finding, this module delivers. It is not for high-integrity safety loops, but for standard redundant control it remains a solid choice.

Manager’s Insight

We stock the PM861AK01 because it solves real plant problems. Downtime costs money. This module offers redundancy and quick swap-out. The slide & lock base saves hours during maintenance. With 12-month warranty and 12–24 hour dispatch, you get reliability from day one. For 800xA users, it is a direct fit. We recommend keeping a spare on site. The classic lifecycle status means long-term availability. Pair it with BC810 for a sectioned CEX-Bus. This is a smart investment for continuous process industries.

Best Fit Equipment and Applications

• ABB System 800xA control systems
• Redundant process control loops
• Oil and gas, chemical, and power plants
• Marine and offshore installations (with certificates)
• Factory automation with S800 I/O
• Applications needing 32 programs and 1 ms cycle times
• Industrial networks with PROFIBUS DP and Ethernet

FAQ

Q: What is the switchover time for redundant configuration?
A: Maximum 10 ms. This keeps your process running smoothly during a CPU fault.

Q: How much RAM is available for my application?
A: You get 7.155 MB. This is enough for typical control logic and data handling.

Q: Does this module support hot swap?
A: Yes, with the slide & lock base plate. You can replace it quickly without long downtime.

Q: Can I use COM4 for a modem?
A: No, COM4 is opto isolated and designed for a configuration tool. Use COM3 for modem control.

Q: What is the power consumption?
A: Typically 250 mA at 24 V DC. Maximum is 430 mA. Plan your power supply accordingly.

Q: Is TUV approval included?
A: No. TUV approval is not available for this model. Check your local requirements.

Q: How fast do you ship?
A: We dispatch in 12–24 hours via FedEx, UPS, or DHL. You get tracking information.

Q: What is the warranty period?
A: 12 months from the date of delivery. Covers manufacturing defects.

Q: Does it work with PM861AK02?
A: Yes, marine certificates cover both PM861AK01 and PM861AK02. They share the same base.

Q: What is the real-time clock stability?
A: 100 ppm, which is about 1 hour per year. Good for event logging and scheduling.

Q: Can I use this in a high-integrity system?
A: No, High Integrity is not supported. Choose a different module for safety-critical loops.

Q: How many I/O modules can I connect?
A: Up to 96 modules with a single PM861A. Up to 84 modules with redundant PM861A.

Buying Guide

• Check your system needs redundancy. This module supports it.
• Confirm your power supply delivers 24 V DC at 430 mA minimum.
• Count your I/O points. 96 modules max for single CPU.
• Verify you have 800xA Control Builder for configuration.
• For marine use, ensure certificates match your project.
• Order spares. Classic status means long lead times later.
• Contact us for volume pricing and technical support.

Contact Information Inquiries: sales@powergearx.com or +86 18030005825

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