Wheelock SP4-APS User manual

P84577 G
Sheet 1 of 14
273 Branchport Avenue
Long Branch, N.J. 07740
Thank you for using our products.
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www.wheelockinc.com INSTALLATION INSTRUCTIONS
ADDRESSABLE PAGING SPLITTER
(FOR SP40/2, SPB-160, SPB-80/4, and SPB-320)
Use this product according to this instruction manual. Please keep this instruction manual for future reference.
MODEL NUMBER:
109920 SP4-APS
1.0 GENERAL:
The Addressable Paging Splitter module (SP4-APS) is designed to be used with Wheelock’s SP40/2 SAFEPATH4 panel and
the SP4-TZC Zone Controller. The SP4-APS can also be mounted in SAFEPATH4 Audio Booster (SPB-160, SPB-80/4, and
SPB-320) panels. The SP4-APS provides a means for expanding one supervised audio output zone to four Class B or two
Class A supervised zones. The SP4-APS also provides two expansion outputs that can be used to add additional audio
booster modules in Class A or B configuration. The SP4-APS is UL Listed under Standard 864, Control Units for Fire
Protective Signaling Systems. It is for indoor use only.
One SP4-APS can be mounted inside the SP40/2 panel. The use of the Splitter Mounting Bracket (SPMB4Z) is required
when mounting the SP4-APS splitter(s) inside the Audio Booster panels.
The Addressable Paging Splitter module (SP4-APS) is also used to expand and distribute supervised telephone paging and
background music to selected zones when the SAFEPATH4 system is not in the alarm condition. When the SAFEPATH4
system is in the alarm condition all telephone paging and background music inputs are silenced and the emergency message
is broadcast on all zones. The SP4-APS is used with the Telephone Zone Controller (SP4-TZC) and controls the distribution
of the telephone paging and background music functions.
NOTE: Use of the Telephone Zone Controller (SP4-TZC) is supplementary.
The SP4-APS contains 16 LED indicators used to monitor and troubleshoot the module.
Refer to the Installation Instructions for the Telephone Zone Controller (SP4-TZC) P84567 when connecting the SP4-APS
modules for telephone paging and background music operation.
NOTE: All CAUTIONS and WARNINGS are identified by the symbol . All warnings are printed in bold capital
letters.
WARNING: PLEASE READ THESE INSTRUCTIONS CAREFULLY BEFORE USING THIS PRODUCT.
FAILURE TO COMPLY WITH ANY OF THE FOLLOWING INSTRUCTIONS, CAUTIONS AND WARNINGS
COULD RESULT IN IMPROPER APPLICATION, INSTALLATION AND/OR OPERATION OF THESE
PRODUCTS IN AN EMERGENCY SITUATION, WHICH COULD RESULT IN PROPERTY DAMAGE AND
SERIOUS INJURY OR DEATH TO YOU AND/OR OTHERS.
2.0 SPECIFICATIONS:
The SP4-APS has a maximum power output per zone that cannot exceed what is listed in Table 1.
Table 1: SP4-APS Specifications
Rated
Voltage
Rated
Current
Audio Input
Voltage
Max Power
Per Zone
25VRMS 40W24VDC 0.120A
70.7VRMS 40W
The total audio power output from all zones on the SP4-APS cannot exceed the audio input power.
Copyright 2005 Wheelock, Inc. All rights reserved.

P84577 G
Sheet 2 of 14
2.1 WIRING SPECIFICATIONS:
Cable Size: All terminal blocks accept #12 - #18 American Wire Gauge (AWG) for single wire connection.
3.0 WIRING INSTRUCTIONS:
NOTE: The terminal blocks on the SP4-APS are removable. To remove a terminal block, pull the block straight up from the
circuit board as shown in Figure 1. Attach wires to the desired connections, then plug the terminal block back on the board
being careful to match and align the pins.
Figure 1: Removable Terminal Block
Figure 2 shows the PC board layout with the locations of all terminal blocks.
OUT IN OUT IN
OUT IN
24 VDC AUDIO
RS-485 ALARM
POWER TROUBLE
Z1 Z2 Z3 Z4 EX1 EX2
IN
CLASS
B
A
SW2
SP4-APS
JP1
NAC
CC
SW1
TB1
TB2
TB7
TB6 TB5 TB4TB3
JP1
Shorted = 70Vrms
Open = 25Vrms
D37 D32
D36 D35
D41
D33
D42 D43
D38 D34 D39
D40
D44
D45
Figure 2: SP4-APS PC Board
Terminals for the RS-485 connections are used with the SP4-TZC and are explained in the SP4-TZC installation instructions.
3.1 Audio Zone Output Wiring
The SP4-APS can be configured for either “CLASS A” or “CLASS B”. It cannot do both at the same time. The maximum
audio power output on any zone is 40 watts. Expansion (EX1, EX2) terminals follow the Class A or B setting that applies to
all zones.
Instead of speakers, up to four SPB-160 or SPB-80/4 (or two SPB-320) Audio Boosters may be connected to an audio output
zone, provided that nothing else is on that zone. The total number of Audio Boosters combined shall not exceed 33.
NOTE: Factory setting is for Class B Wiring.
3.1.1 “CLASS A” Audio Wiring:
When an installation requires “CLASS A” audio field wiring on the SP4-APS module, the Class Selector Switch (SW2)
must be set for “CLASS A”. Note that no end-of-line resistors (UL Listed 10K Ohm, EOLR) are used on any of
the SP4-APS module audio output zones as shown in Figure 3. Zones Z1 and Z2 are connected in Class A
configuration as well as Z3 and Z4. Figure 3 shows the SP4-APS with SW2 and the audio field wiring set for “CLASS
A”.
The audio zone outputs are either 25Vrms or 70.7Vrms matching the audio input voltage. Remember, the SP40/2 has a
maximum audio output to the splitter of 40 watts, while the Audio Boosters have a maximum audio output to the splitter
of 80 watts.

P84577 G
Sheet 3 of 14
OUT IN OUT IN
OUT IN
24 VDC AUDIO
RS-485 ALARM
POWER TROUBLE
Z1 Z2 Z3 Z4 EX1 EX2
IN
CLASS
B
A
SW2
SP4-APS
JP1
NAC
CC
SW1
TB1
TB2
TB7
TB6 TB5 TB4TB3
JP1
Shorted = 70Vrms
Open = 25Vrms
D37
D32
D36 D35
D41
D33
D42 D43
D38 D34 D39
D40
D44
D45
When circuit is not used, jumper
negative to negative and positive
to positive.
Figure 3: “CLASS A” Zone Connections
Any unused “CLASS A” zone must be jumpered negative to negative and positive to positive. If the Expansion (EX1,
EX2) terminals are not used, jumpers are required. See Figure 3.
3.1.2 “CLASS B” Audio Wiring:
When an installation requires “CLASS B” audio field wiring, the Addressable Paging Splitter module’s Class Selector
Switch (SW2) must be set for “CLASS B.” Note that end-of-line resistors (UL Listed 10K Ohm, EOLR) are
required at the end of each audio output zone even if no speakers are present on a zone. End-of-line resistors are
required on the EX1 and EX2 connections whether they are used or not. Figure 4 shows the SP4-APS set for CLASS B
audio field wiring:
The audio zone outputs are either 25Vrms or 70.7Vrms matching the audio input voltage. Remember, the SP40/2 has a
maximum audio output to the splitter of 40 watts, while the Audio Boosters have a maximum audio output to the SP4-
APS of 80 watts.
OUT IN OUT IN
OUT IN
24 VDC AUDIO
RS-485 ALARM
POWER TROUBLE
Z1 Z2 Z3 Z4 EX1 EX2
IN
CLASS
B
A
SW2
SP4-APS
JP1
NAC
CC
SW1
TB1
TB2
TB7
TB6 TB5 TB4TB3
JP1
Shorted = 70Vrms
Open = 25Vrms
D37 D32
D36 D35
D41
D33
D42 D43
D38 D34 D39
D40
D44
D45
EOLR
EOLR
EOLR
EOLR
EOLR
EOLR
All circuits are terminated with an
UL Listed 10K Ohm EOLR
Figure 4: “CLASS B” Zone Connections

P84577 G
Sheet 4 of 14
3.2 Other Wiring
3.2.1 Expansion Circuit Wiring
The Expansion Circuits (EX1, EX2) are used to link additional audio booster panels (SPB-160, SPB-80/4, and SPB-320)
through the SP4-APS. The audio zone outputs are either 25Vrms or 70.7Vrms matching the audio input voltage. EX1
and EX2 are current limited outputs. If an over current condition is detected, the affected Expansion Zone(s) will
disable their audio output. When the over current condition has been cleared and the affected Expansion Zone(s) go
back to “Normal” condition, the audio output will be re-enabled. To ensure that current limiting works properly, for
25Vrms JP1 must be open, for 70Vrms JP1 must be closed. SPB-160 and SPB-80/4 enclosures contain one audio
booster module, while the SPB-320 contains two. The SP40/2 has a maximum audio output to the splitter of 40 watts,
while the Audio Boosters have a maximum audio output to the splitter of 80 watts. Each audio booster module
connected to the expansion circuits uses 1.2 watts. There is a limit of 33 Audio Boosters that can be connected to an
SP40/2 using SPB-160 or SPB-80/4 models. Each SPB-320 counts as two SPB-160 models.
The wiring of EX1 and EX2 for “CLASS A” or “CLASS B” is determined by the wiring of the zone outputs and switch
SW2 setting. If SW2 is set for “CLASS A”, then all zone outputs and expansion outputs must be wired for “CLASS A”.
When using the SP4-APS in “CLASS B” configuration, end-of-line resistors (UL Listed 10K Ohm, EOLR) must be
used at the end of each expansion circuit.
3.2.2 24VDC Wiring
The SP4-APS requires 24VDC input in order to operate. Wire the 24VDC from +/- 24VDC connections on the SP40/2
or the DC OUT connections on the applicable audio booster to the +/- 24VDC IN connections on the splitter. If two
SP4-APS are used on an SPB-160 or two are used with each SPB-160 in the SPB-320 audio booster enclosure, wire the
24VDC OUT connections on the first SP4-APS to the +/- 24VDC IN connection on the second splitter. Observe correct
polarity. See Figure 5 for connection locations.
OUT IN
24 VDC AUDIO
POWER TROUBLE
IN
JP1
TB1
TB2
JP1
Shorted = 70Vrms
Open = 25Vrms
Figure 5: 24VDC Connections
3.2.3 AUDIO IN wiring
The SP4-APS AUDIO IN uses the Audio Out from the SP40/2 or an audio booster, which is either 25Vrms or
70.7Vrms. The total audio output from all zones on the SP4-APS must not exceed its audio input power. See Table 2.
See Figure 2 for the location of the AUDIO IN. The SP4-APS uses 8 watts of audio power to operate (1.35 watts per
zone.)
Table 2: Maximum Audio Input Power to the Splitter from SP4 Products
SafePath4 Product Max number
of SP4-APS
Requires SPMB4Z
(Purchased Separately)
Max Audio Power for
Each SP4-APS
SP40/2 1 No 40W
SPB-80/4 1 Yes (1) 80W
SPB-160 2 Yes (1) 80W
SPB-320 4 Yes (2) 80W

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Sheet 5 of 14
4.0 USING THE SP4-APS WITH THE SP40/2
One SP4-APS can be connected to the SP40/2 panel. It is to be mounted inside the panel enclosure onto the backplane in the
upper right hand corner.
4.1 MOUNTING INSTRUCTIONS:(SP40/2)
Figure 6 shows the mounting location of the SP4-APS Splitter to the backplane of the SP40/2 panel. Figure 7 shows the
correct mounting procedure.
STATUS
AC TROUBLE ALARM
AUDIBLE
TROUBLE
SILENCE
INDICATIONS
When the GREEN "AC" light is ON, the system is energiz ed.
Whenthe YELLOW"TROUBLE"light is ON, thereis a fault in the system
which MUST BE CORRE CTED.
Whenthe RED"STROBE" light is ON,, the strobe c ircuit is active.
IF THE YELLOW "TROUBLE" LIGHT IS ON, THIS UNIT MAYNOT BE ABLE TO PROVIDE EMERGENCY
MESSAGEANNOUNCEMENT CAPABILITIES AND COULDRESULT IN PROPERTY DAMAGE,SERIOUS INJURY,
OR DEATHTO YOU AND/OR OTHERS. IN THE EVENT THE "TROUBLE" LIGHT IS ON, YOU SHOULD
CONTACTYOUR SE RVICE REPRESENTATIVEIMMEDIATELY.
MICROPHONEOPERATION
1. Hold the microp hone within two inches of t he mouth and press the
push-to-talk switch on the mi crophone.
2. Deliverthe message.Activationof the microphonewill deliver the message
toall circuits.
FOR ADDITIONAL INFORMATION
REFER TO THE OPERATION AND INSTALLATION MANUAL.
BEFOREREMOVINGTHIS PANEL.
CAUTION
DO NOT ATTEMPT TO REMOVE OR R EPLACE
MODULAR PC BOARDS INSIDE WITHOUT
DISCONNEC TING ALL PO WER SOURCES TO
THISUNIT FIRST. FAILURE TO DOSO MAY
RESULT INDAMAGE TOTHE PC BOARDS.
DISCONNECTIN G - FIRSTDI SCONNECT
BATTERYPOWER AT BATTERYTERMINALS
THEN DISCONNECT AC POWERAT THE
POWER SOURCE.
RECONNECTING - FIRST RE CONNECT AC
POWERAT TH E POWER SOURCE. THEN
RECONNECTBATTERYPOWER ATTHE BATTERY
TERMINALS .
WARN IN G
BGM
VOLUME
+ -
SP4-APS
MOUNTING STUDS
SP40/2 BACKPLANE
MOUNTING STUDS
COVER STANDOFFS (4)
SP4-APS COVER
MOUNTING SCREW (4)
TOP
RIGHT
SIDE
SP4-APS PC BOARD
Figure 6: Figure 7:
SP4-APS Mounting Location in SP40/2 Enclosure SP4-APS Mounting in SP40/2 Enclosure
1. Position the SP4-APS PC board so that the side with most of the terminal blocks are pointing to the top of the
SP40/2 enclosure and the writing on the PC board can be read. Align the mounting holes on the SP4-APS PC board
with the backplane mounting studs.
2. Using the supplied screws, studs, and standoffs, screw the male end of the 4 cover standoffs through the SP4-APS
PC board and to the 4 mounting studs on the SP40/2 backplane. Tighten all standoffs snug plus 1/4 turn.
3. Attach wiring in accordance with this section and Figure 7.
4. Align the SP4-APS cover with the holes in the cover standoffs and mount the cover using the 4 mounting screws.
Tighten the screws hand tight.
The CC (Contact Closure) Mode Wiring is used when the SP40/2 and Audio boosters are used or when a single SP40/2 is
used with one SP4-APS. The Alarm In and Out terminals on the SP4-APS are supervised. If multiple splitters are used,
ONLY the SP4-APS connected to the SP40/2 is configured for CC Multi-mode.

P84577 G
Sheet 6 of 14
Figure 8 shows an SP4-APS Splitter set for CC Mode and installed with the SP40/2. Figure 8 also shows the proper
separation of Power Limited and Non-Power Limited wiring for the SP40/2.
+
AC
N
L
J3
_
_
+
_
+
+
TB6
_
_
+
_
+
+
TB4
TB3
_
_
+
_
+
+
TB2
_
_
+
_
+
+
TB5
12 3 4
ON
MIC1
U8
DV
D34
RECORD
W1
W2
D11
AC
GRN RED
YEL
TBL STB
STB
SHORT
AUX
STB
OPEN
GF
IN
AUDIO
SHORT
AUDIO
OPEN
AMP
MIC
DV
AUX
AC
BAT
100V
70V
25V
1V
25V
70V
100V
STB OUT
RET
STB IN
NO
NC
COM
A
L
M
T
R
B
NO
NC
COM
IN3
IN2
IN1
NR
TEL
BGM
AUDIO OUT
CC/NAC
AUX IN
TONE
BGM
TEL
NAC
CC
W6
W5
W4
W3
E1
12 3 4
ON
1 23
R
SW1
SW3
SW2
F2
AC
NL
TB7
__
+
_
+
+
TB1
24V
BAT
IN
D13 D14
D9
D10
D37
D39
D22
D35
D36
D49
L
V
L
D54
D55
D58
D60
J4
SW4
J2
W7
W8
P84014 REV
ZONES OUT
TO SPEAKERS OR UP TO FOUR SPB-160'S OR
SPB-80/4'S (OR TWO SPB-320'S) PER ZONE
(Power Limited)
SW1 = CC
10K OHM
EOLR
EXPANSION OUT
TO AUDIO BOOSTERS
(Power Limited)
CC ALARM
INPUT
(Power Limited)
24VDC
(Power Limited)
AUDIO
(Power Limited)
NL
120VAC INPUT
(Non-Power Limited)
RUN POWER LIMITED WIRING
AWAY FROM NON-POWER
LIMITED WIRING USING
THE KNOCKOUTS ON THE
RIGHT SIDE OF THE PANEL.
BATTERY BATTERY
BATTERY WIRING
(Non-Power Limited)
OUT IN OUT IN
OUT IN
24 VDC AUDIO
RS-485 ALARM
POWER TROUBLE
Z1 Z2 Z3 Z4 EX1 EX2
IN
CLASS
B
A
SW2
SP4-APS
JP1
NAC
CC
SW1
TB1
TB2
TB7
TB6 TB5 TB4TB3
JP1
Shorted = 70Vrms
Open = 25Vrms
D37
D32
D36 D35
D41
D33
D42 D43
D38 D34 D39
D40
D44
D45
Figure 8:
Power Limited Wiring Diagram
For Connecting The SP4-APS To The SP40/2.
Refer to the SP4-TZC Installation manual for wiring multiple SP4-APS modules together for telephone paging
and background music.

P84577 G
Sheet 7 of 14
4.3 SP40/2 OPERATION
Refer to the SP40/2 Installation, Operation, Maintenance, and Troubleshooting Manual for proper operation instructions of
the panel.
5.0 USING THE SP4-APS WITH THE AUDIO BOOSTER (SPB-80/4, SPB-160 and SPB-320)
5.1 MOUNTING INSTRUCTIONS:(SPB-80/4 and SPB-160)
The SP4-APS modules are mounted inside the SPB-80/4 and the SPB-160 enclosures using the Splitter Mounting Bracket
(SPMB-4Z - purchased separately).
The Splitter Mounting Bracket can be used to mount two SP4-APS modules to the SPB-160 audio booster and one to the
SPB-80/4. The bracket is to be mounted over the 24VDC Power Supply. Figure 9 shows the mounting location of the SP4-
APS Splitter to the Splitter Mounting Bracket (SPMB4Z).
PS-
PS+
TB1
N
L
ADDRESSABLE PAGING
SPLITTER (SP4-APS)
SPLITTER MOUNTING
BRACKET (SPMB4Z)
24VDC
POWER SUPPLY
ZONE
ZONE
IN
+
-
+
-
+
-
EX1 EX2
IN
+
-
OUT
+
-
ZONE 1
ZONE 2
ZONE 3
ZONE 4
ZONE 1
ZONE 2
CLASS B
WIRI NG
CLASS A
WIRI NG
24 VDC AUDIO
ALARM
RS 485
TROUBLE
POWER
IN
+
-
OUT
+
-
IN
+
-
OUT
+
-
Z2Z1
+
-
+
-
Z3 Z4
+
-
+
-
IN
+
-
+
-
+
-
EX1 EX2
IN
+
-
OUT
+
-
ZONE 1
ZONE 2
ZONE 3
ZONE 4
ZONE 1
ZONE 2
CLASS B
WIRI NG
CLASS A
WIR ING
24 VDC AUDIO
ALARM
RS 485
TROUBLE
POWER
IN
+
-
OUT
+
-
IN
+
-
OUT
+
-
Z2Z1
+
-
+
-
Z3 Z4
+
-
+
-
Figure 9:
SP4-APS Mounting Location for the SPB-80/4 and SPB-160
Figure 10 shows the correct mounting location.
SPLITTER COVER
SPLITTER PC BOARD
(4) #8-32 KEPS NUT
BACKPLATE
(4) #6-32 SCREW
(4) COVER STANDOFF
S
SPLITTER MOUNTING
BRACKET
(SPMB4Z)
Figure 10:
Mounting Diagram for the SP4-APS Splitter and SPMB-4Z Mounting Bracket

P84577 G
Sheet 8 of 14
1. Mount the Splitter Mounting Bracket (SPMB4Z) to the SPB-160 or SPB-80/4 according to the SPMB4Z installation
instructions (P84252).
2. Position the SP4-APS PC board with the main terminal blocks pointing to the top of the Audio Booster enclosure. Align
the mounting holes on the PC board with the mounting studs.
3. Screw the male end of the 4 cover standoffs through the SP4-APS PC board and to the 4 Locking Female Spacers on the
SPMB-4Z. Tighten standoffs snug plus 1/4 turn.
4. Attach wiring and set switches in accordance with this installation instruction and the defined configuration.
5. Align the SP4-APS cover with the holes in the cover spacers and mount the cover using the 4 mounting screws. Tighten
the screws hand tight.
6. Repeat Steps 2 through 5 when installing second splitter in the SPB-160 Audio Booster.
NOTE: One SPMB-4Z mounting bracket can support two SP4-APS splitters.
5.2 SPB 80/4 AND SPB-160 WIRING
Figure 11 shows the correct wiring of the splitter to the SPB-160. Wiring a single splitter to the SPB-80/4 uses the same
procedure.
Figure 11 also shows the proper separation of Power Limited and Non-Power Limited wiring for the SPB-160 and SPB-80.
N
L
PS
PS+
_
GND E1
P82798 REV.C
L
W5
W8
SW4
SW1
J2 R23
W1
D28
J1
D33
D24
D22
W10
D27
D26
D32
D31
W3
D77
D76
D34
W4 W6
D75
J3
D59
F2
F1
TB6
TB5
TB4
TB1
TB2
AUX
TRB
TROUBLE
AMP TRB
GF
EXP OPEN
EXP SHORT
AUD1 OPEN
AUD1
SHORT
EXP OUT
AC
AC TRB
BATTR B
LVL
N
AC IN
DC IN
DC OUT
BATTERY
AUD2 OUT
AUD1 OUT
STB2 OUT
STB1 OUT
EXP OUT
NO CON
C
NO
NC
T
R
B
AUX RET
AUX IN
AUD RET
AUD IN
J4
J5
AUD2 OPEN
AUD2 SHORT
D30
D29
TRANSFORMER
W7
W2
SPB-160, SPB-80/4
PC BOARD
25
70
25
70
25
70
25
70
SPLITTER
ZONES Z1,Z2,Z3,Z4
(Power Limited)
BATTERY BATTERY
Run Power Limited
Audio wiring above
the top and down the
right side of the
splitter module(s).
EX1 and EX2 are not used when the SP4-APS
is connected to an Audio Booster.
Terminate as follows:
"CLASS A" = Jumper - to - and + to +.
"CLASS B" = UL Listed 10K Ohm EOLR across
each EX zone.
OUT IN OUT IN
OUT IN
24 VDC AUDIO
RS-485 ALARM
POWER TROUBLE
Z1 Z2 Z3 Z4 EX1 EX2
IN
CLASS
B
A
SW2
SP4-APS
JP1
NAC
CC
SW1
TB1
TB2
TB7
TB6 TB5 TB4TB3
JP1
Shorted = 70Vrms
Open = 25Vrms
D37 D32
D36 D35
D41 D33 D42 D43
D38 D34 D39
D40
D44
D45
OUT IN OUT IN
OUT IN
24 VDC AUDIO
RS-485 ALARM
POWER TROUBLE
Z1 Z2 Z3 Z4 EX1 EX2
IN
CLASS
B
A
SW2
SP4-APS
JP1
NAC
CC
SW1
TB1
TB2
TB7
TB6 TB5 TB4TB3
JP1
Shorted = 70Vrms
Open = 25Vrms
D37
D32
D36 D35
D41 D33 D42 D43
D38 D34 D39
D40
D44
D45
SW1 = NAC
Run the Power Limited wiring
along the right side and to the
bottom of the enclosure.
Wire Power Limited circuits
away from Non-power Limited
wiring using the knockouts on
the left side of the panel.
Run Power Limited output
zones away from Non-power
Limited wiring using the
knockouts on the left side of
the panel.
Run Power Limited ALARM wiring from
Splitter #2 IN to Splitter #1 OUT. Run
Splitter #1 IN down the left side, across
the bottom of the enclosure, and up the
right side EXP OUT terminals on the
Audio Booster.
Place Power Limited Splitter
output wire run at least 1/4"
above the top of the splitter
circuit board.
N
L
120VAC INPUT
(Non-Power Limited)
24VDC
(Non-Power Limited)
Run 24VDC Non-power
Limited wiring below the
Splitter module(s) and
away from Power Limited
wiring. Place wire run at
least 1/4" above the top of
the SPB circuit board
Wire Non-Power Limited
circuits using top right
side of the panel.
TB3
STB RET
STB IN
Place Battery wire run
at least 1/4" above
the top of the SPB
circuit board.
STB2 and STB1 are used
on the SPB-80/4 only.
STB IN and STB RET are
used on the SPB-80/4 Only.
(Power Limited)
(Power Limited)
Figure 11:
Power Limited Wiring Diagram
For Connecting Two SP4-APS Splitters To An SPB-160 (Or One To An SPB-80/4).

P84577 G
Sheet 9 of 14
5.3 MOUNTING INSTRUCTIONS:(SPB-320)
The SP4-APS modules are mounted inside SPB-320 enclosure using two Splitter Mounting Brackets (SPMB4Z - purchased
separately). Each SPMB4Z is mounted above the corresponding SPB-160 module as shown in Figure 12.
1. Mount the Splitter Mounting Bracket (SPMB4Z) to the SPB-320 according to the SPMB4Z installation instructions
(P84252).
2. Mount the splitters to the mounting bracket according to the mounting instructions in Section 5.1 Mounting Instruction
(SPB-160 and SPB-80/4).
N
L
PS
PS+
_
F1
GND E1
P82798 REV.C
T3
N
LL
L
N
N
N
L
PS
PS+
_
F1
GND E1
P82798 REV.C
T3
L
W5
W8
SW1
J2 R23
W7
D28
J1
D33
D24
D22
W10
D27
D26
D32
D31
D77
D76
D34
W4 W6
D75
J3
D59
F2
F1
TB6
TB5
TB4
TB1
TB2
AUX
TRB
TROUBLE
AMP TRB
GF
EXP OPEN
EXPSHORT
AUD1OPEN
AUD1
SHORT
EXP OUT
AC
AC TRB
BATTR B
LVL
N
AC
DC IN
DC OUT
BATTERY
AUD2 OUT
AUD1 OUT
EXP OUT
SPARE
C
NO
NC
T
R
B
AUX RET
AUX IN
AUD RET
AUD IN
J4
J5
AUD2 OPEN
AUD2SHORT
D30
D29
TRANSFORMER
25
70
25
70
25
70
25
70
L
W5
W8
SW1
J2 R23
W7
D28
J1
D33
D24
D22
W10
D27
D26
D32
D31
D77
D76
D34
W4 W6
D75
J3
D59
F2
F1
TB6
TB5
TB4
TB1
TB2
AUX
TRB
TROUBLE
AMPTRB
GF
EXP OPEN
EXP SHORT
AUD1OPEN
AUD1
SHORT
EXP OUT
AC
AC TRB
BATTRB
LVL
N
AC
DC IN
DC OUT
BATTERY
AUD2 OUT
AUD1 OUT
EXP OUT
SPARE
C
NO
NC
T
R
B
AUX RET
AUX IN
AUD RET
AUD IN
J4
J5
AUD2OPEN
AUD2 SHORT
D30
D29
TRANSFORMER
25
70
25
70
25
70
25
70
AUDIO INPUT
(POWER LIMITED)
AUDIO RETURN
(POWER LIMITED)
Battery #1 Battery #2
Battery #4
Battery #3
120VAC INPUT
(NON-POWER LIMITED)
BATTERY LEADS
(NON-POWER LIMITED)
PLACE WIRE RUN AT LEAST 1/4" ABOVE THE TOP OF THE CIRCUIT BOARD AND
AT LEAST 1/4" FROM POWER LIMITED WIRING.
1
ALARM, ZONE
OUTPUTS, AND
RS485
(POWER LIMITED)
IN
+
-
+
-
+
-
EX1 EX2
IN
+
-
OUT
+
-
ZONE 1
ZONE 2
ZONE 3
ZONE 4
ZONE 1
ZONE 2
CLASS B
WIRING
CLASS A
WIRING
24 VDC AUDIO
ALARM
RS 485
TROUBLE
POWER
IN
+
-
OUT
+
-
IN
+
-
OUT
+
-
Z2Z1
+
-
+
-
Z3 Z4
+
-
+
-
IN
+
-
+
-
+
-
EX1 EX2
IN
+
-
OUT
+
-
ZONE 1
ZONE 2
ZONE 3
ZONE 4
ZONE 1
ZONE 2
CLASS B
WIRING
CLASS A
WIRING
24 VDC AUDIO
ALARM
RS 485
TROUBLE
POWER
IN
+
-
OUT
+
-
IN
+
-
OUT
+
-
Z2Z1
+
-
+
-
Z3 Z4
+
-
+
-
IN
+
-
+
-
+
-
EX1 EX2
IN
+
-
OUT
+
-
ZONE 1
ZONE 2
ZONE 3
ZONE 4
ZONE 1
ZONE 2
CLASS B
WIRING
CLASS A
WIRING
24 VDC AUDIO
ALARM
RS 485
TROUBLE
POWER
IN
+
-
OUT
+
-
IN
+
-
OUT
+
-
Z2
Z1
+
-
+
-
Z3 Z4
+
-
+
-
IN
+
-
+
-
+
-
EX1 EX2
IN
+
-
OUT
+
-
ZONE 1
ZONE 2
ZONE 3
ZONE 4
ZONE 1
ZONE 2
CLASS B
WIRING
CLASS A
WIRING
24 VDC AUDIO
ALARM
RS 485
TROUBLE
POWER
IN
+
-
OUT
+
-
IN
+
-
OUT
+
-
Z2
Z1
+
-
+
-
Z3 Z4
+
-
+
-
ALARM, ZONE
OUTPUTS, AND
RS485
(POWER LIMITED)
24VDC
(NON-POWER LIMITED)
AC VOLTAGE
(NON-POWER LIMITED)
EXP OUT AND
TRB CONTACTS
(POWER LIMITED)
EXP OUT AND
TRB CONTACTS
(POWER LIMITED)
1
1
RUN ALL POWER LIMITED WIRING
USING THE LEFT SIDE OF THE PANEL.
RUN ALL NON-POWER LIMITED WIRING
USING THE RIGHT SIDE OF THE PANEL.
Figure 12:
Power Limited Diagram Showing Four SP4-APS Splitters In An SPB-320
Figure 12 shows the proper separation of Power Limited and Non-Power Limited wiring for the SPB-320 audio booster.

P84577 G
Sheet 10 of 14
5.4 SPB-320 Wiring
Figure 13 shows the proper wiring for the two SP4-APS modules attached to the top SPB-160 module in the SPB-320. All
other wiring for the lower SPB-160 module is done the same way as the top module.
N
L
PS
PS+
_
F1
GND E1
P82798 REV.C
L
W5
W8
SW1
J2 R23
W7
D28
J1
D33
D24
D22
W10
D27
D26
D32
D31
D77
D76
D34
W4 W6
D75
J3
D59
F2
F1
TB6
TB5
TB4
TB1
TB2
AUX
TRB
TROUBLE
AMP TRB
GF
EXP OPEN
EXP SHORT
AUD1 OPEN
AUD1
SHORT
EXP OUT
AC
AC TRB
BAT TRB
LVL
N
AC
DC IN
DC OUT
BATTERY
AUD2 OUT
AUD1 OUT
STB2 OUT
STB1 OUT
EXP OUT
SPARE
C
NO
NC
T
R
B
AUX RET
AUX IN
AUD RET
AUD IN
J4
J5
AUD2 OPEN
AUD2 SHORT
D30
D29
TRANSFORMER
25
70
25
70
25
70
25
70
Audio Zones Out
POWER SUPPLY
SW1 = NAC
EX1 and EX2 are not used when the SP4-APS
is connected to an Audio Booster.
Terminate as follows:
"CLASS A": Jumper to , and to .
"CLASS B" 10K Ohm EOLR across each EX zone.
10K Ohm
EOLR
OUT IN OUT IN
OUT IN
24 VDC AUDIO
RS-485 ALARM
POWER TROUBLE
Z1 Z2 Z3 Z4 EX1 EX2
IN
CLASS
B
A
SW2
SP4-APS
JP1
NAC
CC
SW1
TB1
TB2
TB7
TB6 TB5 TB4TB3
JP1
Shorted = 70Vrms
Open = 25Vrms
D37 D32 D36
D35
D41 D33 D42 D43
D38 D34 D39
D40
D44
D45
OUT IN OUT IN
OUT IN
24 VDC AUDIO
RS-485 ALARM
POWER TROUBLE
Z1 Z2 Z3 Z4 EX1 EX2
IN
CLASS
B
A
SW2
SP4-APS
JP1
NAC
CC
SW1
TB1
TB2
TB7
TB6 TB5 TB4TB3
JP1
Shorted = 70Vrms
Open = 25Vrms
D37 D32
D36 D35
D41 D33 D42 D43
D38 D34 D39
D40
D44
D45
Figure 13:
Wiring Diagram
For Connecting Two SP4-APS Splitters To One Of The Two SPB-160 PC Boards IN An SPB-320.