Technical data

Chapter 10: Module Descriptions
Series SPB Audio Boosters Manual, Revision A
9-2
9.3 Electrical
9.3.1 Input
Parameter SPB-80/4 and SPB-160 SPB-320
Input Voltage 120VAC, 3.8A, 50-60 Hz 120VAC, 7.4A, 50-60 Hz
Battery Backup 24VDC, Up to 33Ah 24VDC, Up to 33Ah
9.3.2 Battery Current Calculations
The current draw of the Series SPB Audio Booster is determined by the configuration being
utilized. Section 4.8, Battery Care and Batteries Calculation, will assist you in developing the
current requirements.
9.3.3 Activation Inputs
The panel audio output is activated by applying a 1V, 25V, or 70.7V to AUD IN. Power
consumption is 1.2 Watts @ 70.7V and 0.25 Watts @ 25V.
The AUX IN is triggered using 8 – 33VDC at 10mA in NAC mode or with contact closure in CC
mode.
9.3.4 Outputs
Parameter Description
Visual Notification Appliance Output
(SPB-80/4 only)
2 output circuits. 2.0 amps at 24VDC.
Supervised.
Central Amplified Audio Output (SPB-80/4) 1 output circuit.
Selectable 25 or 70.7 Volt output at 80W max.
Supervised.
(SPB-160) 2 output circuits.
(SPB-320) Selectable 25 or 70.7 Volt output at
80W max for each. Supervised.
Trouble Contact Form C contact normally energized. Contacts
transfer during trouble: 1.0 amps at 24VDC
max, resistive load (see following warning).
Non-Supervised.
WARNING: Do not exceed the ratings of the status contacts.
Exceeding this rating may cause the relay to fail and prevent a trouble
condition from being indicated.