Solution 144
10
Bosch Security Systems 10/12 BLCC600R
Quick Start Guide
LAN Overview
The control panel communicates with other system module
devices via the built in RS485 LAN or Local Area Network.
For increased security, the system uses anti-substitution
technology and a proprietary data encryption algorithm to
communicate with all LAN modules.
When using the recommended cable types the LAN can
be up to 1200 metres in length, or even greater when LAN
isolators are used.
See the CM797 LAN Isolation Module reference guide for
more information on how to use LAN isolators to increase
the overall LAN length, improve surge immunity protection
and prevent earth loops.
It is recommended that one or more CM797 Isolators
be used when connecting the LAN between multiple
buildings.
LAN Wiring
Figure 18 and Figure 19 show the two recommended
module connection diagrams.
The method shown in Figure 18, is only recommended for
use where the total LAN length is 300 metres or less and the
system is not installed in a electrically noisy environment.
In this case it is possible to use 7/0.20 or 14/0.20 security
cable (non twisted) provided that module voltage levels
are maintained within specification.
The method shown in Figure 19, offers the greatest
immunity to noise interference and voltage surges. This
connection method is recommended where the total LAN
length is greater than 300 metres. When using twisted pair
cable the LAN length can be up to 1200 metres, and this
can be extended even further when using LAN isolators.
The LAN can be wired using the daisy chain method as
shown, where each module is wired back to the panel
on the same cable run or using a star configuration,
where individual modules are wired back to the panel on
individual wires.
Un-shielded cable can be used successfully in many
situations however for the highest reliability and
performance in areas prone to frequent electrical storms or
high levels of electrical interference, shielded twisted pair
cable should be used.
LAN+ and LAN- should not be used to power detectors or
other external devices. These devices should be powered
from the +12V terminals on the panel or via an external
power supply.
When wiring modules with built in power supplies like
the control panel and the CM720B Power Supply, do NOT
connect the EARTH wire from any 3 wire plug pack to the
module’s EARTH input terminal, if you have installed a
separate communication earth wire.
+
-
A
B
+
-
A
B
+
-
A
B
-
A
B
+
-
A
B
CONTROL PANEL
CM704-ZONE EXPANDER
KEYPAD
CM720-POWER SUPPLY
CM710-OUTPUT EXPANDER
EARTH
EARTH
EARTH
EARTH
+12V OUT
LOOP
LAN
TERM
N
Y
L
A
N
LAN
TERM
N
Y
LAN
TERM
N
Y
LAN
TERM
N
Y
L
A
N
L
A
N
L
A
N
L
A
N
First Device
Last Device
Security Cable
(7/0.20-14/0.20)
cable can be used
for this wiring
configuration.
= LAN +
= EARTH
= LAN A
= LAN -
= LAN B
Connect to mains
earth via 3 wire
plug pack transformer.
The LOOP
terminal is
not internally
connected.
It can be
used to
terminate
the LAN+
on modules
which have
an on board
power supply.
Positive LAN
voltage is
re-generated
by the CM720
Power Supply.
= +12V OUT
+ - A B
E
A
- A B
B
-
+
A
B
-
+
E
Fit Shunt
Fit Shunt
300 metr
es max
Connect to
mains earth
via 3 wire
plug pack
transformer.
Figure 18: LAN Connection Using 2 Pair Security Cable
The LAN A and LAN B wires are not interchangeable. Make
sure that the LAN A wires from all modules connect to LAN
A on the panel and LAN B wires from all modules connect
to LAN B on the panel.
Do not connect the positives of two power supply
sources together. When wiring the LAN to modules
that are self powered, or powered from an external
source you should terminate the LAN+ into the
terminal marked LOOP. This terminal is simply a
termination point and is not internally connected.
i
Note
