_______________________________________________________________________________________________________________________________
European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH [email protected] Tel: +44 (0)208 743 8880
www.e-2-s.com Fax: +44 (0)208 740 4200
Document No. IS 2442-P Issue E 23-04-10
Sheet 5 of 5
On 100V line units the end of line resistor used must have a
minimum resistance value of 4k7 ohms and a minimum
wattage of 2.5 watts
On low impedance units the end of line resistor used must
have a minimum resistance value of 2k ohms and a minimum
wattage of 0.5 watts or a minimum resistance value of 500
ohms and a minimum wattage of 2 watts. On the low
impedance units care must be taken with the polarity of the
monitoring voltage. If an end of line resistor is fitted to a unit
the links on the printed circuit boards of all loudspeakers in
the line must be cut for the dc blocking capacitors to be in
circuit in order to dc monitor the line (see figure 7).
Beacon
PCB
Unit No. 2
L
N
Unit No. 1
Loudspeaker
PCB
C 15 7.5
3
1
Beacon
PCB
L N
L N
Beacon
PCB
L N
C 15 7.5
3
1
Loudspeaker
PCB
C 15 7.5
3
1
Loudspeaker
PCB
Unit No. 3
Signal
BExCL15-05D AC Combined Loudspeaker Unit
+
-
Signal
+ -
C 15 7.5
3
1
+ -
C 15 7.5
3
1
+ -
C 15 7.5
3
1
Loudspeaker
PCB
Beacon
PCB
Loudspeaker
PCB
Beacon
PCB
Loudspeaker
PCB
Beacon
PCB
Unit No. 1
Unit No. 2
Unit No. 3
BExCL15-05D DC Combined Loudspeaker Unit
