Videotec DTRX3, Руководство по эксплуатации

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Page 13 MNVCDTRX301_0850
6.9.3 Mixed configurations (point-to-point / multi-point)
This is a combination of the two previous connection modes and, depending on the combination chosen, allows
the user to exploit the advantages of the two types of connection to the utmost, significantly reducing the
probability of faulty operation.
The following is an example of mixed connection:
In the example shown, if
receiver R3 jams (multi-
point connection in line L3) it
will
not cause faulty
operation in receiver R4.
R3 is not at the ends of line
L3, and it is not therefore
necessary to terminate it.
If receiver R2 jams, since it
is the ‘generator’ of line L3,
all receivers connected to it
in cascade (R3 and R4) will
not receive the commands.
6.10 Connection with the Current Loop line
The various devices (keyboard DCS2, video matrix SM328B and receiver DTRX3) can be connected directly
using the telephone cable supplied by the manufacturer:
Connection DCS2 - receiver DTRX3
For normal connections in the field, refer to the connections made using the shunt boxes RJ, supplied by the
manufacturer, following the reference tables given below:
Current Loop Communication Mode:
max. distance 1500 metres from DTRX3.
Jumper JP2 and JP3 on position CL.
DCS2 / DCMT8 DTRX3
TX CL Yellow ------- Terminal RX CL
GND CL Red ------- Terminal AGND