Videotec MAXIMUS MHXT - Manual (Page 29)

Instruc
tions manual - English - EN
29
7.3.10 Serial line connection
The installation is type TNV-1, do not
connect it to SELV circuits.
In order to reduce the risk of fire, only use
cable sizes greater than or equal to 26AWG
(0.13mm²).
The product has an RS-422 serial one-way internally
terminated communication line. The line works with
PELCO D (2400baud, 9600baud) or VIDEOTEC MACRO
(9600baud, 38400baud), maximum distance of
1200m (3937ft).
RS-485-1
1200m max
Control
keyboard
Fig. 34
The line can be configured using the board's DIP1
selector dip-switch.
X1
ON
ON
OG
DIP 1
1 2 3 4 5 6 7 8
ALCO A D E 0 8
Fig. 35
Pass the relays cables through the entry device.
Pull out the J12 removable connector from the CPU
board and connect the cables as shown in the table.
CONNECTION OF THE RS-485 OUTPUT
Serial line Terminal Description
RS-485 A (+) RS-485 line
B (-) RS-485 line
AGND Reference line
RS-485
Tab. 8
Insert the wired connector into the connector and
connect the cables with a cable tie.
Fig. 36
When the dip-switch rocker is up it
represents the value 1 (ON). When the
dip-switch rocker is down it represents the
value 0 (OFF).