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712-8 INSTALLATION GUIDE | DIGITAL MONITORING PRODUCTS
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To communicate the status of the eight zones, the module
responds to two addresses on the Keypad Bus and eight
addresses on the LX‑Bus. You can set the module starting
address to any bus address from 0 to 15. The module
automatically responds to this address, the next address
on the Keypad Bus, and the next seven addresses on the
LX‑Bus.
To change the current address, move the slide switches to
the appropriate address positions according to Figure 4.
Keypad Bus Addressing
The module can be set to the following keypad addresses
according to panel model: 1 through 8 for XT30/XT50
and XR150 Series panels, or 1 through 15 for XR550 Series
panels. Additionally, the eight zones on the module occupy
two keypad addresses.
For example, if the module is set to address 2, the first four expansion zones occupy address 2 and respond
as zones 21‑24. The last four expansion zones occupy address 3 and respond to the panel as zones 31‑34. For
more information about Keypad Bus addressing, refer to Table 1.
Note:
Because the 712‑8 is supervised, both addresses must be selected in Device Setup of the
XR150/XR550 Series programming when used on the Keypad Bus.
LX‑Bus Addressing
When connecting to the LX‑Bus, the module must be addressed to match the last two digits of the
first zone being used. The next seven zone addresses are automatically used to communicate expander
zones 2 through 8 status.
For example, on an XR150 panel using LX‑Bus 1 if you set the module address to 8, the eight zones on the
expander respond as zones 508 to 515. When connected to an XR550 panel using LX‑Bus 2, the zones respond
as 608 to 615. For more information about LX‑Bus addressing, refer to Table 2.
Note:
Only two 712‑8 Modules can be connected to each LX‑Bus.
ADDRESS THE MODULE
Z1
Z2 Z3
Z4 Z5
Z6 Z7
Z8
GND
GND
GND
GND
KEYPAD
LX-BUS
TXD
BLK
BLK
RED
RED
712-8
AC
1
2
3
4
5
6
7
8
10
11
12
13
14
15
16
17
18
9
+B
BELL GND
SMK
GND
RED YEL GRN BLK
Z1
Z2 Z3
Z4
Z5
20
Z6
AC
-B
GND
19
GND
21
Z7
22
GND
23
Z8
24
Z9
25
Z10+
26
Z10-
RED
PROG
XT30
To other zone
expansion modules
on the same bus.
1K EOL
1K EOL
1K EOL
1K EOL
1K EOL
1K EOL
1K EOL
1K EOL
Zone 1
Zone 2
Zone 3
Zone 4
Zone 8
Zone 7
Zone 6
Zone 5
Use supplied 1K EOL resistors on each zone.
Normal operating range is 650-1200 Ohms
These 4-pin headers are connected
together internally to allow bus
connection of other zone expansion
modules.
ADDRESS
Figure 3: Wiring Diagram
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 0
Figure 4: Addressing the Module
