Cooper Wheelock SAFEPATH SPB-160, Installation, Testing, Operation And Maintenance Manual

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Chapter 5: Operation
Series SPB Audio Boosters Manual, Revision A
5-2
5.1.1 Audio Notification Appliance Output Circuit Supervision
The SPB-80/4 has one 80-watt circuit, while the SPB-160 has two 80-watt circuits. The SPB-320
has four 80-watt circuits. The audio notification appliance output circuit uses Class B, Style Y
wiring, and is supervised for open and short circuits. Output circuit supervision requires
installation of UL Listed 10K Ohm, 1/2W EOLR on the output circuit. A sensed open circuit
trouble will illuminate D18 for AUD2 and D30 for AUD1 audio open LED. See Figures 8-1 and
8-2 for LED location.
5.1.2 Visual Notification Appliance Output Circuit Supervision
(SPB-80/4 only)
The SPB-80/4 has two 2-amp visual notifications circuits. The visual notification appliance
output circuit on the SPB-80/4 uses Class B, Style Y wiring, and is supervised for open and short
circuits. Output circuit supervision requires installation of UL Listed 10K Ohm, 1/2W EOLR on
the output circuit. A sensed strobe open circuit trouble illuminates D53 for STB1, D69 for STB2.
See Figure 8-1.
5.1.3 Amplifier Supervision
A supervisory tone plays through the amplifier section during standby for supervision purpose.
Any sensed trouble illuminates D77 “AMP” LED indicator. See Figure 8-2 for the SPB-160 for
LED indicator location.
5.1.4 Ground Fault Supervision
The panel supervises for ground fault conditions on Class B, Style Y field wiring that is not
electrically isolated. The supervised wiring includes contact inputs and audio NAC circuit
outputs. All other wiring is electrically isolated. If a ground fault condition exists, D100 GF LED
indicator illuminates. See Figures 8-1 and 8-2 for LED indicator location.
5.2 Actions that Initiate Alarms
A 1V, 25V, or 70.7V input from a voice evacuation panel initiates the voice output. On the SPB-
80/4, a selection of either a 8-33 VDC NAC input or a contact closure connected to the strobe
input activates the two 24VDC, 2A strobe output circuits.