Standard Connection Cable - Eneo EKR-KB1 Betriebsanleitung

Setup
Devices in
chain
Mixed setup

3.3 Standard connection cable

The connection between the EKR-KB1 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 the latest generation of Videotec products (video switchers SM42A, SM82A, video matrix
SW328, EKR-8/4, EKR-16/4, etc.) 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:
Description
a The devices are connected in pairs
using single lines. These should be
terminated at the ends. This type of
setup can only be made when the
devices have a
(reception) and output (transmission)
channel, like the Videotec DTRX1 and
DTRX3 receivers.
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.
It is possible to
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)
RJjack1
EKR-KB1
RS485A
RS485B
Example
separate input
set up mixed
L=1200 m
RJjack2
RJjack 1 RJjack 2
White Blue
Yellow Black
Page 12
Device
RS485A
RS485B
MNNCEKRKB1_0439