EverFocus KS-KBK, Operating Instructions Manual, Page: 58 / 188

Page 8 MNECKSKBK_0350
Setup Description Example
The received signal is sent “clean” to
the next device. If one device is
blocked, communication is cut off to the
devices later in the chain.
The maximum total length is equal to
the number of lines multiplied by
1200m for each distance.
Mixed setup It is possible to set up mixed
configurations, always bearing in mind
the limits given above:
•
each line can have a maximum
length of 1200m
• each line should be terminated at
the ends
•
the stubs should be very short
(max. 2m)
3.3 Standard connection cable
The connection between the KS KBK keyboard and the various controlled devices is made only and exclusively
using a RS485 serial channel.
When the controlled device does not provide this channel it will be necessary to insert a signal converter (e.g.
RS486-RS232 or RS485- Current loop) between the keyboard and the device itself.
Connection with video matrix KS VM 328 and KS VM 164 can be made directly using a serial 1.5m telephone
cable, which is supplied.
A pair of telephone cables with a pair of RJjack shunt boxes can be used to arrive at distances of up to 1200m
using the following connection diagram:
KS KBK RJjack 1 RJjack 2 Device
RS485A White Blue RS485A
RS485B Yellow Black RS485B
3.4 One contr ol keyboard per line
Connection is performed by means of one standard connection cable, which is described in the previous
paragraph.