Voting System.

Voting system as used in the South African Parliament National
Assembly Chamber. The system comprises of 420 voting stations
with three buttons to register a Yes, No or an Abstain vote.
These peripherals are connected to a controller using an RS485
interface. The Controller supports 16 RS485 lines each capable
of driving 128 devices. The controller links to a PC via an
RS232 interface. The PC allows recording and printing of the
results and data-base management. The system also supports five
buttons to allow the selection of an individual from a group of
five candidates.

Talk/ Service System

Parliamentarians can register a request to speak at the podium
or request a usher to collect or retrieve documents etc.
The system comprises of 430 Talk/ Service stations with two
buttons to register requests to Talk or for Service. These
peripherals are connected to a controller using an RS485
interface. The Controller supports 16 RS485 lines each capable
of driving 128 devices. The controller links to a PC via an
RS232 interface. Two LEDS on the Talk/ Service peripheral
indicate to the user that the request(s) have been submitted.
The requests are sent from the controller to a PC which in
turn is connected to an Ethernet Intranet. The management and
servicing of the requests are handled by other software systems
on the network. The PC that is directly connected to the
controller simply provides acknowledgements of received
messages and messages back to the controller to confirm that
the Service and Talk requests have been handled. Once handled,
the LEDS on the Talk/ Service requesting peripherals are
extinguished.

Speech Timer

The timer hardware consists of three displays, one large seven
segment LED display and two alpha numeric LCD displays and two
keypads. The displays and keypads are all RS485 serial
peripherals. The peripherals are simply linked together in a
daisy chain using RJ45 connectors. Power comes from a single
source. This allowed easy placement of the devices. The speech
duration and start of the timing are initiated from one of the
keypads. The other keypad is locked out at this point. The
timer counts down. A warning LED is switched on one minute
before the allotted time expires. On expiry a "Stop" LED is
switched on. The timer then counts up, indicating "over time".
The timer may be paused or cancelled at any point.