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Institute Mihailo Pupin
Institute Mihailo Pupin is the leading Serbian R&D institution in the field of Information & Communication Techologies.

Automation & Control Systems Ltd
The Automation & Control Systems Ltd is the core division of the Institute Mihailo Pupin, and the owner of the projects: ATLAS Systems and ATLAS-MAX.

The long list of the Institute's references and customers is the best proof of its high professional and techological achievments.

The other related IMP project: VIEW4 Software Package for control of complex processes

You are here:     ATLAS-MAX System Organization Hardware Organization
Hardware Organization


ATLAS Logic Diagram

ATLAS presents a dedicated process computer designed for harsh process environment.  Its basic hardware organization matches the usual process computer architecture, which could be furthermore decomposed into several functional parts:

  • Power Supply Unit - PSU provides a continuous electrical power supplying of all ATLAS parts: Central Computing Unit (CCU) and Process Interface (PI).  Depending on an actual system configuration and implementation, power supply could be realized as a single or dual (redundant) power supply system, multiple-tied power supply units (due to the high system consumption), as integral part of the CCU, or any combination of previous.
  • Central Computing Unit (Central Processing Unit) - CCU is a core ATLAS component - a “heart” and a “brain” of the system.  This is a programmable component of the system that keeps ATLAS control software and manages all process interface I/O modules, all existing databases and remote and network communication.  There are two basic versions of ATLAS CCU:

- ATLAS-CPU - a dedicated industrial-type PC computer.  The internal CCU architecture could be industrial ISA or PCI bus based. A full compliance toward existing industrial PC standards is preserved, allowing easy system upgrades and updates.

- ATLAS-XP2 - a single printed circuit board PC compatible microcomputer.  The board design matches an average processing requirements, suitable for small and low medium range control systems.  The microcomputer architecture complies with the PC104 bus standard, with attached piggy-back Pentium module and extender for other PC compatible cards.

  • Process Interface - PI is a common term for numerous input/output modules that provide interface between industrial process environment and ATLAS processing/computing resources.  Based on the direction of process data flow (in or out), PI modules are grouped into:

- Input PI modules acquire data from the process (different industrial and electric power processes) in real-time manner, which are than passed to the computing portion ATLAS CCU for further handling and processing.

- Output PI modules deliver data to the process (setup, control and indication data) in real-time manner, which are usually causing certain status and state changes in the process.


All ATLAS Process Interface I/O modules were designed to fit into the proprietary mechanical and electrical standards for ATLAS equipment.  Among them, a special attention was paid to the proprietary standard known as: ATLAS PI Bus, which specifies types, modes of operation, and locations of all address, data, control, identification and other process interface signals crucial for ATLAS operations.  For more details about ATLAS PI Bus click HERE.

Note: The presented division in the ATLAS organization is very general and functional only.  The listed organizational parts differ significantly in the size and complexity.