19
If a screened cable is used in a radial circuit, the screen at the end of the cable run
should also be connected to earth. If there is a voltage potential difference between the
panel earth and the remote earth point, connect the screen to the earth point via a 2.2
F
polyester (non-polarised) capacitor of suitable voltage rating.
2.3.3.3 Loop Wiring Format
PREFERRED METHOD
– A fault condition will be indicated if an open
circuit condition wiring occurs but the panel will still communicate with all
luminaires.
To wire the signalling circuit as a Loop circuit, connect one wire of the 2-
Core cable to one of the (+) terminals and connect the other wire to one of
the (
–) terminals.
Route the cable to each of the luminaires in turn.
Return the wiring to the Line Driver and connect the two wires to the
remaining (+) and (
–) terminals. See diagram opposite.
Connect the wiring to the terminal blocks in the Luminaire.
Total loop length (from Line Driver OUT to Line Driver IN) should not
exceed 1500 metres.
The cable length depends on the line loading, cable core diameter
– Refer
for a list of recommended cables
and distances.
+ - + -
Line
OUT
Line
RETURN
IN
–
IN
–
O
UT
+
O
UT
+
The connections on the
Pulse
Line Unit
are not polarity
specific. However, it is
recommended that terminals
(B) are used for the (+) signal
line and terminals (A) are
used for the (-) signal line.
-
+
From
Panel
Luminaires
-
+
Return to
Panel
A
B
C
D
To maintain signal line supervision, break the wiring run at each Luminaire. The
Luminaire is provided with two B and two A terminals.
2.3.3.4 Pulse Luminaire Serial Numbers
Each
Pulse
Line Unit
has a unique serial number. This serial number is printed on a self-adhesive label attached
to the module or luminaire enclosure.
As each luminaire is installed and wired to the system, tear off the spare serial number label and affix to the
installation record chart supplied with the panel. This will enable quick and simple allocation of soft addresses to
each PLU and will provide a record of the installation for future reference.
2.3.4
Auxiliary Supply Output
The Lx-9400 is equipped with an auxiliary 24V DC, 300mA
power supply output.
This can be used for powering ancillary equipment.
Each chassis of the Lx-9800 has its own AUX output.
B
A
T
+
B
A
T
–
AUX
– (GND)
AUX + (24V)
Lx-9400
