Technical data

Chapter 3: Overview
Series SPB Audio Boosters Manual, Revision A
3-2
3.2 Standard Features
Feature SPB-80/4 SPB-160 SPB-320
Strobe Input Circuit Power limited 8-33VDC
NAC or CC strobe
Activation
No Strobe Circuits. No Strobe Circuits.
Strobe Output Circuit
• Two -
27VDC, 2A Max
regulated NAC
Supervised power
limited strobe outputs.
• Selectable Outputs:
System Wide Wheelock
Sync, Pass Through, or
Constant DC.
• Trouble LED's for open
and short output
conditions.
• Supervised with 10K
Ohm 1/2W EOLR.
No Strobe Circuits. No Strobe Circuits.
Audio Input Circuit One 1.2 Watt 1V, 25V,
or 70.7V input.
One 1.2 Watt 1V, 25V or
70.7V input.
Two 1.2 Watt 1V, 25V or
70.7V input.
Audio Output Circuit • One 80-Watt, 25V or
70.7V selectable,
supervised, power
limited audio output.
• Trouble LEDs for open
and short output
conditions.
• Supervised with 10K
Ohm 1/2W EOLR.
• Two 80-Watt, 25V or
70.7V selectable,
supervised, power
limited audio output.
• Trouble LEDs for open
and short output
conditions.
• Supervised with 10K
Ohm 1/2W EOLR.
• Four 80-Watt, 25V or
70.7V selectable,
supervised, power
limited audio output.
• Trouble LEDs for open
and short output
conditions.
• Supervised with 10K
Ohm 1/2W EOLR.
Battery Standby Sleep
Mode
• When Audio Booster loses AC power, the amplifier section shuts down in order
to conserve battery power.
• The Four-Wire Mode allows non-alarm functions on the SP40S. When an
alarm signal sends a message to the Audio Booster, the amplifier re-energizes
and broadcasts the message.
• The Two-Wire Mode also shuts off non-alarm functions (BGM, TEL, etc.) on
the SP40S. When a NAC/CC is sent to the AUX IN the Audio Booster will wake
for broadcast.
Power Supply Selection • 120VAC, 3.8A, 50-60Hz input
• 27VDC, Up to 33Ah Battery Backup
• 27VDC, 0.5A Power Output for Splitter
Connections
• Two separate 27VDC
Power Supplies
• 27VDC, Up to 33Ah
Battery Backup
Supervision Full supervision with on-board diagnostics and trouble reporting circuits for:
Audio NAC circuit wiring  open and short conditions
Ground Fault detection
Strobe NAC circuit wiring  open and short conditions
Amplifier  operation
Input voltage/low battery
Trouble Reporting Form C relay trouble contacts for external notification.