5.
8
(MT13 - En 2015)
5
4
3
2
1
4
3
2
1
DV242..
LM
LM
LO
LM
LO
LM
LI LI
LM
LM
1 2 3 4 5
2 3
2
1
J*
15
W
100
W
J1
VC/CT
1 2 3 4
J*
VC/CT
4
3
2
1
DV242..
LM
LM
LO LO
LI LI
LM
LM
1 2 3 4 5
1 2
3 4
4 5
J*
70
W
47
W
100
W
J1
VC/CT
Internal
Floor distributor and terminal names of the derived outputs
stations
active
passive
DV2421Q DV2424Q DV2422A DV2421P DV2424P
LM
LM
L1 / L2
LM
LM
EH9262C
-
-
EX3252C
-
-
EX3262
-
-
EX352
EX362
ML2002C
-
-
ML2062C
-
-
ML2262C
-
-
ZH1262
-
-
Video intercom connections
Each DUO line (main or derived) must have the final section
terminated in order to have the correct resistive load. Normally
the line terminating equipment is the internal station (video
intercoms and/or intercoms) which are therefore provided with
jumpers for line matching.
As standard, all internal stations are designed to have a line
impedance of 100
Ω
.
This configuration can be varied only in the following cases:
- video signal interference; change impedance to 15
Ω;
- internal station is not the last apparatus; move the jumper to
the open line (see the “intercom/video intercom serial con-
nection to the distributor output” section on page 5.9).
Connection of video intercoms, intercoms and actuators to
the riser line
For a correct video signal distribution an active or passive floor distributor must
be used. To match the distributor and internal station consult the following table.
INSTALLATION NOTES
Table 5.4. Adaptation impedance closing in internal sta-
tions of the DUO line (LM terminals)
1-2 = termination 47
Ω
2-3 = open line (default)
3-4 = termination 70
Ω
4-5 = termination 100
Ω
Jumpers
Position of the jumpers
1-2 = termination 100
Ω
(default)
2-3 = termination 15
Ω
3-4 = open line
J1
J*
J* = J1
J* = J1
J* = J2
J* = J11
Series Exhito
Zhero
myLogicOne
Echos
Table 5.5. Adaptation impedance closing in video dis-
tributors of the DUO line (LO terminals)
Jumpers
Position of the jumpers
DV2421..
DV2422A
DV2424..
Table 5.6. Choice of distributor depending on the internal station used
Ways of terminating the impedance of the DUO line on the last riser video distributor
a) LO terminals not connected Terminate the line imped-
ance placing the jumper J1 in one of the three possible
positions
b) LO terminals located at the last
riser video intercom/intercom. The
line impedance is terminated placing
the jumper J* (see table 5.4) of the
video intercom or the intercom in one
of the 2 possible positions. The jumper
J1 on the distributor must be left in the
open line (2-3) position.
VC/CT = videointercom or intercom
V
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