EN
Connections
1998NA
MONTANTE
CITOFONICA
POSTO
ESTERNO
~
24
T
X
R
X
~
0
L
M
L
M
C
H
C
H
G
N
D
L
P
2
L
P
1
O
U
T
O
U
T
N
O
C
1195
1
2
1
2
0
2
3
0
0
2
4
Description of terminal block
Earthing
24 ~ 24V DC power supply
0 ~ 0V DC power supply
LP1 LP2 Line for incoming data from the external unit
LM LM Data line to risers
CH CH Free contact for “call repeat” or “enable external monitor”
OUT OUT C NO output for remote camera control
NO C Normally open contact for “FOLLOW ME” function
TX RX GND
RS232 serial port for connection to the remote switchboard in systems with multiple
switchboards in series or in parallel
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