Instruction manual

AUDIO
BOOSTER
SP40/2
AUD OUT
AUD IN
AUD RET
AUD IN
AUD RET
AUD IN
AUD RET
W1
W10
Closed
Open
W1
W10
Closed
Open
W1
W10
Open
Open
MASTER
EXP OUT
ALARM
NO/COM
AUX IN
AUX IN
AUX RET
AUX IN
AUX RET
UL Listed
10K Ohm
EOLR
UL Listed
10K Ohm
EOLR
SW1
CC
EOLR
10K Ohm
UL Listed
SW1
NAC
SW1
NAC
AUDIO
BOOSTER
AUDIO
BOOSTER
Figure 3-2
Connections for Multiple Audio Booster in Four-Wire Mode
On the master Audio Booster panel, connect the SP40/2 “normally open” and “common” alarm
relay connections to the AUX IN connections. Connect a UL Listed 10K Ohm EOLR across the
SP40/2 Alarm Relay connections. Place the switch SW1 in the “CC” position. Remove jumper
on W1 and W10.
Connect the EXP OUT on the master Audio Booster to the AUX IN of the second Audio Booster.
Connect the AUX RET to the next Audio Booster AUX IN and continue to the last Audio Booster.
Connect the UL Listed 10K Ohm EOLR on the last AUX RET on the last Audio Booster.
On Audio Booster panels 2 through 33, set SW1 to NAC. Insure jumper W1 is in place. Remove
jumper W10.
NOTE: When the contact closure is used in the 4-wire mode, jumper W1 shall be removed on
the master Audio Booster and installed on subsequent Audio Booster panels. If jumper W1 is
removed and an EOLR is not installed the TROUBLE LED D24 and the AUX TRB LED will be
lighted.
NOTE: 4 wire mode must be used when a SP4Z-APS audio splitter is installed on the SP40/2.
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