Technical data

ATS Designers Guide 33

3 COMMUNICATIONS

The alarm and access control system has extended communication capabilities. Viewed

globally, the communications, that is, the bi-directional data transmission, should be

divided into two aspects: system internal communications, and communications between

the system and the outside world – reporting events to monitoring stations.

System internal communications (Drawing 3-1) has been divided into 3 basic parts:

• Control Panel Network Bus – connecting the control panels to a computer with a

managing program, connecting the panels into a network;

• System Bus – communications between the control panel and RAS, DGP

expansions;

• Local Bus – communications of DGP and RAS with their peripheral equipment.

Due to its nature, the subject of Control Panel Network Bus has been divided into

communication with a PC, and network operation of the control panels. Service

connection with a PC has been described in the first part.

Readers,

DGP,

Addressable sensors,

Wireless devices

TITAN

System Management

Station

Control Panel Network

Bus

RAS

DGP

RAS

DGP

stem Bus

Local Bus

Control Panel

SMA

Reporting

Service

Diagnostics

Drawing 3-1 Advisor MASTER system communications diagram.

3.1 System bus

The ATS system design assumes communications between system elements (DGP,

RAS) with a master unit – the control panel (Drawing 3-2). Up to 16 RAS stations and 15

DGP devices can be connected to one control panel. The control panel itself is identified