Technical data

Chapter 4: Installation
Series SPB Audio Boosters Manual, Revision A
4-22
+
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AUDIO
UL LISTED 10K OHM,
END OF LINE RESISTOR
Figure 4-17 Wiring Diagram for Audio Only Notification Appliance Output
CAUTION: Do not loop wire under terminals. Break wire run to provide
supervision of the connection.
4.4.5 Trouble Output Contact Wiring
The locations of the Trouble Status Output Connections are shown in Figures 4-5 (SPB-80) and
4-6 (SPB-160 and SPB-320). A magnified view of this area on the motherboard is shown in the
same figures. When connected to the SP40S, troubles will be transferred via the Audio Input
terminals.
Wire gauge selection of the system Trouble Status output contact wiring should involve
consideration of all factors including, wire length, maximum current capacity, and maximum
voltage drop allowable.
The system Trouble Status output contact is Form C, rated for 2.0 amps at 24VDC, resistive load.
For a detail of the system Trouble Status output contact terminal connections (shown in the
trouble position), see the figure immediately below.
NO
NC
C
T
R
B
Figure 4-18 Trouble Status Relay Contacts
4.4.6 Power Connection Requirements
4.4.6.A SPB-80/4 and SPB-160 Power Connection Requirements
The Audio Booster Panel contains a 27VDC Power Supply (SPB). Batteries are charged from the
battery charger located on the Audio Booster PC Board.
1. Connect the AC input power to the Line (L) and Neutral (N) terminals on the Power
Supply PC Board (SPBPS) as shown in the figure immediately below.