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- PM861A
- AC 800M Control System Processor Unit Kit Module
- Sweden
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- 0.5kg
- 3BSE018158R1
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Product Details: PM861A (3BSE018158R1)
Brand
Series
AC800M / System 800xA Processor Modules
Product Introduction
The PM861A is a compact, efficient processor module leveraging ARM Cortex‑A9 architecture for smooth and reliable execution of control logic within distributed control systems. It includes onboard RAM, real‑time clock, LED indicators, INIT push button, and CompactFlash interface. Dual Ethernet ports and serial interfaces ensure strong communication and redundancy in demanding industrial environments.
Applications
The module is widely used in:
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System automation across manufacturing, chemical, and energy industries
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Precision power management and distribution systems
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Advanced process control in buildings, infrastructure, and critical systems
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As a CPU unit in distributed I/O systems requiring compact, redundant processing
Advantages
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Reliable, fault‑resilient design with redundancy features (Ethernet, CPU, CEX‑Bus)
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Compact form factor, easy DIN‑rail installation with slide‑and‑lock mechanism
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Multiple communication ports—including dual RJ45 Ethernet and isolated serial for configuration
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Hardware identity via unique Ethernet address and on‑board diagnostics
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Balances performance and cost‑effectiveness for scalable control systems
Technical Parameters
| Parameter | Specification |
|---|---|
| Model / Part Number | PM861A (3BSE018158R1) |
| Processor Type | ARM Cortex‑A9 (CompactFlash‑equipped CPU board) |
| Memory / Storage | RAM (onboard), CompactFlash slot, Real‑Time Clock |
| Communication Interfaces | 2× RJ45 Ethernet (Control Network), 2× Serial (RS‑232C and isolated) |
| Redundancy Support | CPU, CEX Bus, Ethernet ports, S800 I/O support |
| Mounting / Housing | DIN‑rail slide‑and‑lock mechanism, IP20-rated |
| Diagnostics | LEDs, INIT button, hardware ID per base plate |
| Dimensions (mm) | Approx. 127 × 127 × 127 mm (shipping box); CPU board ~115 × 85 × 38 mm |
| Weight (kg) | Approx. 0.5 kg (shipping box ~1 kg) |
Related or Same-Series Models
| Model | Highlights / Parameters |
|---|---|
| PM861A (3BSE018158R1) | Compact ARM Cortex‑A9 CPU, CF slot, redundancy; ~0.5 kg, DIN‑rail mount |
| PM861AK01 (3BSE018157R1) | Includes base plate, terminators, battery, ~1.15 kg packaged, redundancy support |
| PM861AK02 (3BSE018160R1) | Redundant processor kit, includes backup CPU and full redundancy (higher weight) |
| PM860K01 (3BSE018100R1) | AC800M CPU module; mid-tier performance and compatibility |
| PM864AK01 (3BSE018161R1) | High‑performance ARM or MPC862 CPU with broad I/O and redundancy options |
| PM856K01 (3BSE018104R1) | AC800M mid-range processor; compact and efficient, 0.6 kg |
Popular ABB Models (Same Brand)
| Model | Highlights / Parameters |
|---|---|
| PM861A | Compact ARM-based processor with redundancy and CF slot |
| PM861AK01 | Full kit including base and terminators; redundancy ready |
| PM861AK02 | Dual-CPU redundant version for highest availability |
| PM860K01 | Mainstream CPU option compatible across AC800M systems |
| PM864AK01 | Higher-end CPU with fast performance and large I/O support |
| PM856K01 | Efficient mid-tier CPU with Profinet/Ethernet support |
FAQs (Q&A Format)
Q1: What CPU does the module use?
A1: It uses an ARM Cortex‑A9 processor on a compact board with RAM and a CompactFlash slot.
Q2: What communication ports are included?
A2: It includes two RJ45 Ethernet ports for control network, plus two serial (RS‑232C and isolated).
Q3: Does it support redundancy?
A3: Yes—redundancy for CPU, CEX‑Bus, Ethernet, and IO is supported.
Q4: How is it mounted?
A4: Mounted on DIN‑rail using a slide‑and‑lock base plate for easy removal/install.
Q5: What diagnostics does it offer?
A5: LEDs, INIT reset button, and hardware Ethernet ID for troubleshooting.
Q6: What are its dimensions?
A6: CPU board ~115 × 85 × 38 mm, shipping box roughly 127 × 127 × 127 mm.
Q7: How heavy is it?
A7: The board is about 0.5 kg; packaged module ~1 kg.
Q8: What industrial systems is it used with?
A8: Used as the CPU in ABB’s AC800M / System 800xA automation controllers.
Q9: Why pick this model?
A9: Compact, powerful, redundant, easy to install, and cost-effective for scalable control.
Q10: What makes it scalable?
A10: Supports modular expansion via base plate and I/O terminators, with redundancy built-in.