| The Smart Access model SA-1773 Central Power Processor interfaces with
model SA-1606 Door Units, model SA-1930 Input-Output devices and model SA-1936 Graphic
Display Panels utilizing a two (2) wire multi-drop communication line. When interfaced,
the system becomes a powerful Multiple Door access control system featuring distributed
processing. Distributed processing, where immediate decisions about granting or denying
access are made at the individual door, is superior to a centralized system where all
decisions are made at the main CPU. Thus, degraded mode does not exist in the event of the
CPU or link failure. The model SA-1773 Central Power Processor can accommodate up to 64
devices on a two (2) wire communication line. Additional devices can be attached utilizing
the SA-1920 Repeater. The Central Power Processor has a twelve (12) button numeric keypad,
a Liquid Crystal Display (LCD), a high speed communication port and a parallel printer
port. Programming of single doors, or blocks of doors is fast and easy thanks to the LCD
prompts. With a printer connected, activity for all doors or selected doors may be logged
as it occurs. The Central Processor can store transactions in its internal buffer, thus
eliminating the possibility of lost messages even under heavy traffic conditions. Further,
if the link with any of the connected devices on the two (2) wire communication line is
broken, the central processor will advise the operator and when the device comes back
online, handle all incoming message processing. |
