Figure 3-6 Audio And Auxiliary Connections (Spb-160 And Spb-80/4); Figure 3-7 Strobe Input Connections (Spb-80/4) - Wheelock SAFEPATH4 Application, Installation, Operation, And Maintenance Manual

Audio and Auxiliary Input Connections
The audio input circuit (AUD IN) consists of either the power limited 25V or 70.7V circuit of the
SP40/2 panel. The input uses a blocking capacitor for DC supervision. The audio return (AUD
RET) can be used to link other SAFEPATH4 Audio Boosters to the host voice evacuation panel,
additional speakers powered by the host panel, or connecting the host panels EOLR.
The auxiliary input circuit is used to trigger the SAFEPATH4 Audio Booster to return to full power
from a reduced power mode when operating on the backup battery supply. The input can be
selected to be a power limited 8-33VDC NAC circuit or a contact closure. This is selected by
switching SW1. The AUX RET is used to link additional Audio Boosters to the Auxiliary Circuit or
connecting the host panel's EOLR.
Audio and Auxiliary Input Connections (SPB-160 and SPB-80/4)
1. Connect the audio output from the voice evacuation panel to the AUD IN terminals. Connect
the SP40/2 panel's EOLR to the AUD RET terminals.
2. Select the proper audio input voltage, using jumper J2 (Input Voltage Select). Location of the
jumper is shown in Figure 3-19A and Figure 3-19B on page 36.
CAUTION: Input and Output audio voltages shall be matched. If a 25V is selected as the
input voltage, then 25V shall be selected as the output voltage.
3. Connect the NAC or Contact Closure input to the AUX IN terminals. Connect the voice
evacuation panel's EOLR to the AUD RET terminals.
Strobe Input Connections
The strobe input circuit (STB IN) consists of either a power limited 8-33VDC NAC circuit input or a
contact closure input. The input user reverse polarity for supervision. The strobe return (STB
RET) can be used to link other SAFEPATH4 Audio boosters strobe NAC circuits to the host voice
evacuation panel, additional strobes powered by the host panel, or connecting the host panels
EOLR.
1. Connect the strobe input to the STB IN terminals. Connect the proper device or connection
to the STB RET.
AUD IN
AUD RET
AUX IN
AUX RET
Audio Input and
Battery Wakeup Mode
Figure 3-6
STB IN
STB RET
Strobe Input and
Strobe Return
Figure 3-7
Strobe Input Connections (SPB-80/4)
TB2
TB3
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