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C.System Connection
3-1 Conference Unit Connection
CS-120 Conference System has simple and effective structure. The system
can be installed easily and fast without special training. Special extension
cords connect the conference units with other conference units and CU by
daisy chain scheme. CS-120CU has 3 export backbone cables (7P-DIN)
to connect with conference units. Every conference unit is equipped with a
cable with 7P-DIN male connector. Since the distance between conference
units are diverse, there are original cable connection and extension cable
connection as follows:
Original cable connection
●
CS-120 conference units are equipped with a 1.5 m 7-Pin cable with male
connector and a 0.6 m 7-Pin cable with female connector. The male cable
connector of the first conference unit links to the 7 PIN-DIN output adaptor.
The female cable connector behind the first conference unit links to the male
connector of the second conference unit, and so on. The female connector of the
last conference unit links to the terminal connector.
Extension cable connection
●
When the distance between conference unit and CU or other conference units
is longer than 2.1 m, the user needs to use extension cable to connect the units.
Because of the resistance, the extension cable causes the decrease of voltage.
When the cable length is longer, the number of connectable devices of every
cable connector will decrease.
The relationship is as the following table:
The distance between CU and the first
(the length of extension cable)
Table 3-1 the relationship between extension cable length and conference units
When extension cable connects CU with the first conference unit, in the
meantime, the maximum load current of CU can affect all following units.
However, the effect of extension cable between the last two conference
units is negligible, because the cable only carries the current of the last unit.
For example, in one way without other extension cable, only one 100 m
extension cable connects the 29th with the 30th conference unit.
conference unit
10m
20m
40m
80m
100m
The number of connectable conference
units of every connector
30
27
24
21
16
11
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