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Chapter 4 System connection and basic setup procedure
4.1 Overview
The Large-Scale Voting System has a simple and
reasonable structure with high extendibility in hardware.
The system installation is simple and quick and does not
need special training. Daisy-chain connection is adopted
between voting units as well as to CMU via dedicated
6PIN cable.
TCP/IP protocol is adopted for Ethernet connection
between the CMU and the PC. As a result remote control,
remote diagnosis and remote update can be achieved.
Application software for client and server can run on one
computer or on different computers in the same LAN.
The operator is able to control the progress of the
meeting flexibly.
In this chapter, the connections of the Large-Scale
Voting System are introduced by diagrams and
examples.
4.2 Connection principles
In the Large-Scale Voting System the power is provided
by HCS-4100MC/50 CMU (or HCS-8300ME(/F)
extension unit) for all voting units. Thus, the total number
of system units in any installation is limited by the
maximum power handling capacity and control capacity
of the CMU (or EMU). One CMU contains 2x 6P-DIN
outlet trunk-line cable connectors, and each outlet
connector can output 60W. One extension main unit
(EMU) contains 4x 6P-DIN outlet trunk-line cable
connectors, and each outlet connector can output 80W.
Since the power capacity of a 6P-DIN interface is limited,
it must be ensured that, during the installation, the sum
of the total power consumption of all the voting units
connected to every single 6P-DIN interface plus the
power loss in the extension cables does not surpass the
power limit of each 6P-DIN interface. Otherwise the
system will not work properly or automatic protection will
occur.
Daisy-chain connection by dedicated 6 pin cable is
effected to connect a congress main unit to an extension
main unit or to interconnect two EMU.
The Large-Scale
Voting System can accommodate 4096 voting units (by
using system application software up to 100 chairman
units can be connected but only 1 chairman unit does
have control facilities).
Table 4.1 Quick lookup table for the max. number of connected congress units
The extension cable length between the CMU(EMU) and the
first Congress Unit connected to the socket
Type Type
No.
20 m
40 m
60 m
80 m
80 m +
HCS-4352/50
+80 m
80 m + HCS-4352/50
+ 80 m + HCS-4352/50
+ 80 m
Equipped with 256×32 LCD,
without speaker nor microphone
HCS-4368/50
30
26 24 22
15
10
Without 256×32 LCD, without
speaker nor microphone
HCS-4368SDTE/50
HCS-48U6DVOTTME
30
29 26 24
19
14
*
Note:
Cable Splitter HCS-4352/50 is needed when the length of an extension cable exceeds 80 m.
(Cable splitter is used as repeater only and cannot improve load capability.)
Note:
)
The added up cable lengths between a main
unit and the most remote congress unit must
not exceed 250 m;
)
The length of an individual extension cable
must not exceed 80 meters. Otherwise it will
affect the signal quality. In case the length
exceeds 80 m, HCS-4352/50 is needed;
)
The extension cable between the main unit
and the first congress unit is carrying the
maximum possible current. However, the
cable length between the two last congress
units is nearly insignificant because this cable
only carries the current for one unit.
