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2.3.3
Signalling Line Installation
2.3.3.1 General Considerations
The Line Driver Module, shown opposite, provides power
and signalling pulses for the digital communications with the
luminaires.
Up to four Line Drivers can be installed in the panel. Refer
to Section
for details of how to install additional line
drivers.
Route the signalling circuit away from other electrical cables
to minimise the effect of electrical interference. It is
recommended that a 2-Core Twisted-Pair cable be used. In
extremely noisy conditions, the use of a cable with external
screen is recommended.
Refer to
information on cable types to be used.
When screened cable is used, it is vital to connect the screen / drain wire to the chassis
/ earth at the cable gland input / earth stud in the panel. Always ensure that all segments
of the cable loop have continuity of the screen and take care to ensure that the screen is
not exposed to any other earth point (e.g. metalwork, cable trays, junction boxes, etc.).
The outputs of the Line Driver Module are short circuit
protected. The wiring can be connected in Radial Format or
as a Loop Circuit (Preferred Method).
For ease of maintenance and connection, the wiring is
terminated in a plug and socket arrangement, shown
opposite.
The signalling circuit consists of a pair of wires (+ and
–).
Four terminals are provided to enable loop operation.
IN
–
IN
+
OUT
–
OUT
+
Base Card Terminations (Typical).
2.3.3.2 Radial Wiring Format
To wire the signalling circuit as a Radial Line, 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.
Connect Jumper Wires between OUT+ / IN+ and OUT
– / IN–.
Total Cable length (from Line Driver to last Luminaire in wiring run) 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
IN
–
IN +
OUT
–
OUT
+
Connect the wiring to the terminal blocks in the
Luminaire.
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
To next
Luminaire
Luminaires
To maintain signal line supervision, break the wiring run at each Luminaire. The
Luminaire is provided with two B and two A terminals.
