Thursday 24 March 2011

SYSTEM ARCHITECTURE OF BMS


 
The system shall be implemented as an integrated, open solution, which enables Service Center
connectivity through standard Building Operating System (BOS) interface.
The System Architecture shall consist of four levels:

- Service Level
- Management Level
- Control Level
- Field Level

The system shall be completely modular in structure and freely expandable at any stage. Each level of
the system shall operate independently of the next level up as specified in the system architecture. For
example, Control Level shall operate independently without support from Management Level.
The system shall be fully consistent with the latest industry standards. To enable efficient functional
system integration and to provide maximum flexibility and to respond to changes in the building use, the
system offered shall support the use of Lon Works, Modbus, M-bus, Ethernet TCP/IP and Internet
communication technologies.

Service Level:

Service Level shall allow the systems to be connected without additional software for providing centralized remote monitoring, alarm and fault detection of connected
building management and security systems
The Service Center shall be capable of accessing remotely the systems through a standard interface
through the BAS platform. The standard connectivity shall enable providing advanced maintenance and
security services, such as security alarm monitoring, maintenance alarm monitoring, remote diagnostics,
main user capability, remote control and optimization of all systems, energy optimization, trending and
reporting services.

Management Level

Management Level shall provide a uniform view to all systems through the open Building Operating
System (BOS) platform. All the systems - controls of cooling, ventilation and lighting, consumption
measurements, access controls, intruder alarms, fire alarms and NVR/DVR systems - shall be integrated
with the BOS using device drivers.
The BOS shall offer at least the following common services to be used by all connected systems:
o Alarms
o Historical trending
o Logs and reporting
o User profile and role management
The BOS shall collect trends from defined points, collect and forward alarms from the systems. The BOS
shall enable efficient management of user rights. The BOS shall be capable of forwarding alarms to
mobile phones using SMS & E-mai, local alarm printers or to Service Center. It shall be possible to browse the
alarm history for reporting and statistical purposes.

 Control Level

The Control Level shall consist of a distributed network of smart controllers, which communicate to each
other using a commonly known field bus as specified herein. Connectivity towards Management Level
shall utilize standard TCP/IP protocol.

The controllers shall include all the intelligence of the system. All communication shall be event based,
real-time peer-to-peer communication. All controllers shall be capable of operating autonomously
independently of Management Layer. For example, all systems react to alarms on the Control Layer
without interference from upper layers.
Security controllers shall utilize RS-485 connection
between the network controller and the interface panels.

Field Level

The Field Level shall consist of industry standard sensors and actuators, industry standard
card readers and IP cameras.

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