ABB 5366168-A (A12) Processor PCB — Replaces 5347951-C, 3.6864 MHz CPU for S100 I/O Racks

Brand ABB

Model ABB 5366168-A (A12)

Product Overview

The ABB 5366168-A12 is the genuine printed circuit board (PCB) at the heart of the ABB Advant Controller 160 (AC160) — the central processor module that executes the control program and orchestrates all I/O communication within an AC160 PLC system. Known internally by the ABB system designation 5347951-C, the ABB 5366168-A12 is built around a Motorola 68000-family microprocessor running at 3.6864 MHz and is available with 1 MB, 4 MB, or 8 MB of on-board DRAM, giving it the deterministic execution and memory headroom needed for demanding discrete, batch, and process-control applications.

In the ABB automation architecture, the ABB 5366168-A12 is the “brain” of the controller: it stores and runs the application logic, manages the real-time task schedule, and serves as the bus master on the S100 I/O backplane, communicating with digital, analog, and special-function I/O modules across up to 20 I/O slots. The module integrates serial communication (RS-232/RS-485) for programming, diagnostics, and peer-to-controller or HMI/SCADA connectivity, and retains program and configuration data in non-volatile memory so that operation resumes automatically after power restoration.

As a key member of ABB’s Advant Controller family — sharing the application-engineering environment with the AC450, AC410, and MasterPiece 200 series — the ABB 5366168-A12 benefits from a mature, field-proven instruction set and a vast installed base in power, pulp & paper, metals, water, and process industries worldwide. For plant engineers maintaining legacy but still highly capable AC160 systems, the ABB 5366168-A12 represents a cost-effective, point-to-point replacement that restores full processing capability without requiring a system-wide migration or reprogramming.

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Description

Technical Specifications

Parameter Name	Parameter Value
Product Model	5366168-A12 (also referenced as 5366168-A; system name 5347951-C)
Manufacturer	ABB
Product Type	Printed Circuit Board / CPU Module (Central Processor)
Controller Platform	Advant Controller 160 (AC160), S100 I/O family
Processor	Motorola 68000-family microprocessor
Clock Speed	3.6864 MHz
On-Board DRAM	1 MB / 4 MB / 8 MB (build-dependent)
Program / Data Memory	Battery-backed, retains program & configuration through power cycles
I/O Bus	S100 backplane; supports up to 20 I/O slots
Serial Communication	RS-232 / RS-485 (programming, diagnostics, HMI/SCADA)
Power Supply	24 VDC (via S100 backplane / rack power)
Programming Environment	ABB Advant Controller engineering tools (AC160 / Advant OCS)
Mounting	S100 rack slot / DIN-rail compatible carrier (per rack design)
Operating Temperature	-25 °C to +70 °C
Storage Temperature	-40 °C to +85 °C
Humidity	5% to 95% RH, non-condensing
Protection / Certification	IP20 (module level); CE compliant

Main Features and Advantages

Deterministic 68000-class processing: The ABB 5366168-A12 leverages the proven Motorola 68000 architecture, renowned for clean interrupt handling and deterministic execution. Running at 3.6864 MHz, it delivers the predictable scan-cycle timing that safety, interlocking, and closed-loop control demand—without the latency or variability introduced by general-purpose operating systems.

Flexible memory configuration: With 1 MB, 4 MB, or 8 MB of on-board DRAM, the ABB 5366168-A12 can be matched to the application’s program size and data-logging requirements. Larger-memory builds accommodate extensive control strategies, recipe management, and historical data, while battery-backed retention ensures that programs and configuration survive power interruptions and restart automatically.

S100 I/O bus mastery: As the backplane bus master, the ABB 5366168-A12 directly addresses up to 20 I/O slots of S100 digital, analog, and specialty modules. This tight coupling between processor and I/O yields fast, synchronized data exchange and simplifies system expansion—additional I/O is added by populating rack slots rather than redesigning the controller.

Integrated serial connectivity: Built-in RS-232 and RS-485 ports on the ABB 5366168-A12 provide straightforward interfaces for programming, real-time diagnostics, peer-to-peer controller communication, and connection to HMIs or SCADA systems. This eliminates the need for separate communication processors in many applications.

Seamless Advant engineering ecosystem: The ABB 5366168-A12 is programmed and configured using the same Advant Controller engineering environment as the broader AC160/AC410/AC450 family. Existing application code, libraries, and commissioning know-how transfer directly, dramatically reducing the learning curve and risk associated with processor replacement or system expansion.

Legacy-asset life extension: For facilities running mature ABB systems, the ABB 5366168-A12 closes the spare-parts gap and supports a targeted, board-level repair strategy. Replacing only the CPU PCB avoids the cost, downtime, and re-validation effort of a full controller or system migration—extending the productive life of proven automation assets.