
500-9041 v4.1
Welcome Report Control Admin Sys Config
Tech-Ref
253
Panels to Modem Connection: RS-485 (Multi-Panel)
Using the RS-485 adapter / kit allows for longer distances between the modem and a panel, and
also allows multiple panels (up to 30) to be linked together on a single modem connection.
Note:
External modems to be used with system panels must 1
st
be set up as described previously under "Panel
Modem Configuration".
Panel
Main PCB
1432
5
1432
CTS/RTS
RTS/CTS
DSR/DTR
DTR/DSR
RI/RI
CD/CD
TB14 TB15
green
black
132
TB16
0V
B
A
white
RS485
RX/RX
TX/TX
GND/GND
green
black
white
Connect via
DB9 - DB25
and a null-modem
adapter
(or equiv. cable)
.
RS485 Communication Cable P/N
120-3401
Note:
The "A" and
"B" connections here
are reversed relative
to the panel(s).
To additional panels (up to 30)
0V
B
A
(24 AWG, 4 wires, shielded)
MODEM
Cable shield (do not
ground at the modem
Cable Shield: Connect to the
chassis/earth ground at one
panel only
(e.g., 1st or last)
A
B
GND
+12V
GND
RS485
converter
100-2185
Tip:
An RS485 connection supports distances of at least 300 m (1000 feet) in total length.
Once connected to the panels, the modem simply plugs into a standard telephone jack using a
telephone extension cable.
Note:
Modems require a direct/analogue telephone line.
Note:
This configuration does
not
support automatic dial-in transmission of alarm / activity messages to the MONITOR
AFx system (although panel connections can be initiated manually, or scheduled for regular times, and central
monitoring is supported as always).
Also See (Related Topics):
•
"New Installation? Try the Wizard!"
•
"Panel Connection Overview"
•
"Setting Up a New System (Commissioning)"
•
"Panel Communications and Updates.
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