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LABOR STRAUSS SICHERUNGSANLAGENBAU GMBH
- Wiegelestrasse 36 A-1231
Wien Austria
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Picture 6 & 7 - Power supply unit example schemes
Picture 10 - Convention-
al line wiring (zone line
EOL resistor inside of
the device)
www.lst.at
L20-SGCWE-3000 (v1.0)
MAIN MONITORING
BACKUP MONITORING
Picture 8 - Power
supply monitoring
lines wiring
DEVICE WIRING - POWER SUPPLY
The conventional system expander module must be
power supplied either:
- directly by the control panel or
- from an external power source or
- from an external power source with a power backup
unit.
Use the scheme at the right for connecting the power
supply to the device.
This terminal wiring scheme is always applied.
If you want to use an external power source with a
power backup unit, two additional module’s terminal
blocks come in use: “MAIN MONITORING” and
“BACKUP MONITORING”.
“MAIN MONITORING” is a terminal that supervises the main power supply of an external power supply unit.
“BACKUP MONITORING” is a terminal that supervises the backup power supply of an external power supply unit.
Let’s have two examples of power supply units:
“MAIN MONITORING” and “BACKUP MONITORING” lines will be connected to the module as in the following scheme:
-
+
POWER SUPPLY
Picture 5 - Power
supply connection
scheme
DEVICE WIRING - CONVENTIONAL ZONE LINE
In order to connect this device to the conventional zone line, two types of schemes can be used, depending on the positioning of the
expander module on the line:
- the expander module is positioned at the beginning or in the middle of the zone line (conventional devices follow the device on the
line or are positioned before and after it); therefore the zone line EOL resistor must be fitted externally as is normally done, but not
into the device’s terminal blocks:
- the expander module is positioned at the end of the zone line (all conventional devices are positioned before it); therefore the zone
line EOL resistor must be fitted to the device’s terminals and not externally as normally is done.
Picture 9 - Conventional
line wiring (zone line
EOL resistor outside of
the device)
IMPORTANT: please note that with this wiring
configuration, if a fault occurs on the wireless
sub-system, all the reminder conventional line,
subsequent the expander, is isolated from the
system until the fault itself is handled and
reset; this occurs unless each sensor on the
conventional line is equipped with a Schottky
diode and the control panel provides for their
use.
Please refer to your applicable codes of prac-
tice and to your conventional control panel
documentation.
