wheelock PS-12-24-8 INSTALLATION INSTRUCTIONS

POWERPATH

PS-12/24-8

(108114)

POWER BOOSTER

POWER SUPPLY

Installation Instructions

273 Branchport Avenue, Long Branch, NJ 07740-6899 Ph: [phone] Fax: [phone]
Web Site: www.wheelockinc.com e-mail: [e-mail]

P83862 M

Copyright 2002 Wheelock, Inc. All rights reserved.

Thank you for using our products.

Use this product according to this instruction manual. Please keep this instruction manual for future reference.

TABLE OF CONTENTS

1.0 - INTRODUCTION AND SPECIFICATIONS

1.1 - INTRODUCTION 2

1.2 - SPECIFICATIONS 3

1.3 - TERMINOLOGY 3

1.4 - TERMINAL IDENTIFICATION 5

1.5 - LED STATUS 7

1.6 - BATTERY MAINTENANCE 7

2.0 - INSTALLATION INSTRUCTIONS 7

2.1 - UNPACKING 7

2.2 - MOUNTING 7

2.3 - WIRING 9

2.4 - RELAY STATUS CONNECTIONS 10

3.0 - OPERATION 11

3.1 - MODES OF OPERATION 11

3.2 - DIP SWITCH SETTINGS 11

3.3 - CLASS “B” OPERATION 12

3.4 - CLASS “A” OPERATION 15

3.5 - MASTER REMOTE OPERATION 19

4.0 - TROUBLESHOOTING 21

5.0 - COMPATIBLE APPLIANCES 22

6.0 - WARRANTY STATEMENT 23

FIGURE 1: POWERPATH PS-12/24-8 4

FIGURE 2: TERMINAL LOCATIONS 6

FIGURE 3: MOUNTING DIMENSIONS 8

FIGURE 4: BAT FAIL/AC FAIL DIAGRAM 10

LIST OF FIGURES

FIGURE 5: OUTPUT DIP SWITCH(S) 11

TABLE 1: TERMINAL IDENTIFICATION 5

TABLE 2: LED STATUS DESCRIPTION 7

TABLE 3: DIP SWITCH SELECTION 9

LIST OF TABLES

TABLE 4: TROUBLESHOOTING 19

P83862 M Sheet 1 of 23

NOTE: All CAUTIONS and WARNINGS are identified by the symbol

. All WARNINGS are printed in bold capital

letters.

WARNING: READ THIS INSTRUCTION MANUAL CAREFULLY. FAILURE TO COMPLY WITH ANY OF THE
FOLLOWING INSTRUCTIONS, CAUTIONS, AND WARNINGS COULD RESULT IN IMPROPER APPLICATION
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.

1.0 INTRODUCTION AND SPECIFICATIONS

1.1 INTRODUCTION

The PS-12/24-8 POWERPATH is an 8 AMP, 12/24VDC, filtered and regulated, supervised remote power supply/charger used
for supervision and expanded power driving capability for Fire Alarm Notification Appliance Circuits. The PS-12/24-8 may be
connected to any 12 or 24VDC Fire Alarm Control Panel (FACP) by using a Notification Appliance Circuit (NAC) or a “Dry
Contact”. Primary applications include NAC expansion (supports ADA requirements) and auxiliary power to support system
accessories. This unit provides filtered and regulated 12 or 24VDC, 8 AMP supply to up to four (4) Class B, two (2) Class “A”,
or two (2) Class “B” and one (1) Class “A” Notification Appliance Circuits. Additionally, an auxiliary power output that can be
reset is provided. The PS-12/24-8 also contains a battery charger capable of charging either 7 or 12 AMP/Hour (AH) of battery
backup. The PS-12/24-8 can only provide a maximum load of 8 amperes for 5 minutes with a 7AH battery or 15 minutes with a
12AH battery.

Two FACP NAC circuits or two “Dry” contact closures can be connected to the POWERPATH inputs. These inputs can then be
directed to control supervision and power delivery to any combination of the four (4) outputs.

Each output is rated at 2 AMPS (either Class "A" or Class "B") and can be programmed to generate a steady or Code 3
Temporal horn sound and a strobe output under alarm condition. A maximum 4 AMP output is achieved by paralleling 2
outputs (Class "B" only).

The PS-12/24-8 under non-alarmed condition provides independent loop supervision for Class “A” and Class “B” FACP NAC
circuits. In the event of a loop trouble, the FACP will be notified via the POWERPATH steered input (IN1 or IN2). In addition
there are common trouble output terminals (used to indicate a loop trouble) and common trouble input terminals (used generically
by any initiating circuit).

Wheelock horns/strobes, strobes and horns with synchronizing capability can be utilized with the PS-12/24-8. Audibles can be
silenced with only two wires. Additionally, the POWERPATH can provide a temporal coded signal for appliances that can
utilize it.

P83862 M Sheet 2 of 23

1.2 SPECIFICATIONS

Approvals:

• UL Listed 864 Control for use with Fire Protective Signaling

• MEA approved – NYC Dept. of Buildings

• California State Fire Marshall (CSFM) approved

• NFPA 72 compliant

Inputs:

• 115VAC, 60Hz, 3.2 AMP Operating Power in Alarm

• 12/24VDC Battery Backup Connection

• Two (2), 12 or 24VDC NAC Initiating Circuits (9-30VDC at 5mA)

• Two (2) “Dry” Contact initiating Circuits

• Accepts two Class “A” or two Class “B” circuit inputs

• Built in battery charger for sealed lead acid or gel type batteries

Outputs:

• Switch selectable 12VDC or 24VDC power limited outputs

• 8 AMP continuous supply current at 12VDC or 24VDC for 5 minutes with 7AH battery or 15 minutes with 12AH

battery.

• Capable of four (4), Class "B" circuits (2 Amps each)

• Two outputs may be paralleled for a maximum output of 4 AMPS on a circuit (Class "B" only)

• Capable of two (2) Class “A” circuits (2 Amps each).

• Capable of one (1) Class “A” circuit (2 Amps) and two (2) Class “B” circuits (2 Amps each)

• Code 3 or constant voltage output generation

• Built-in Wheelock synchronization mode that can be fed to any or all of the output circuits

• Input and output can be synchronized with “IN>OUT SYNC” mode (SM, DSM or 2

• Audible silence capability

• Filtered and electronically regulated output

• 50mA auxiliary output with reset capability

Supervision:

• Compatible with 12 or 24VDC FACP

• Signaling appliance loops are supervised and steered to either IN1 or IN2

• 22K OHM, ¼ Watt End-of-Line-Resistor (EOLR) for supervision of all outputs

• Common input and output trouble circuits

• Automatic switchover to standby battery when AC fails

• Thermal and short circuit protection with auto reset

• Input and output status LED indicators

• AC fail supervision (Form “C” contact, 1 AMP 28VDC)

• Battery presence and low battery supervision (Form “C” contact, 1 AMP 28VDC)

• Auxiliary output fail supervision (Form “C” contact, 1 AMP 28VDC)

• Ground Fault Detection (factory installed UL Listed 22K OHM resistor /wire assembly connected from positive (+)

1.3 TERMINOLOGY

AUX to chassis ground)

CLASS “A” = STYLE Z
CLASS “B” = STYLE Y
FACP = Fire Alarm Control Panel
EOLR = End-of-Line Resistor
NAC = Notification Appliance Circuit
SM = Wheelock Sync Module with single output.
DSM = Wheelock Sync Module with two outputs.
C = Common
NC = Normally Closed
NO = Normally Open
AH = Ampere/Hour

nd

PS-12/24-8 is required)

P83862 M Sheet 3 of 23

Figure 1:

POWERPATH PS-12/24-8

22K OHM RESISTOR/WIRE ASSEMBLY

BAT FAIL

NC C NO

AC FAIL

NC C NO

OPEN = 24V SW1 CLOSED = 12V

POWER SUPPLY

TRANSFORMER

DC

SW1

SW2

+

DETAIL A

_

NO "REMOTE" C

AUX

+

AUX
RESET

LOGIC BOARD

_

_

OUT2

OUT1

+

CLOSED

OUT2

INP2

AC

OUT3

AC

UPPER

LOWER

OUT4

FAULT

"FAULT" NC
C

NO

WHITE
LEAD

BLACK
LEAD

C

NC

115 VAC, 60Hz

GREEN
LEAD

GROUND

+

-

IN1 IN2

+

OUT3

OUT4

_

RET1

_

BAT+-

ON

ON

ON OFF

+

RET2

+

AC

4

2 3

1

OUT1

4

2 3

1

INP1

_

C "DRY1" NC

IN2

_

RET2

C "DRY2" NC

DC

_

DC

+

_

OUT3

+

+

OUT

ON

4

ON

ON

OFF

_

OUT1

4

INPUT SELECT

TEMPORAL

2 3

STROBE SYNC

1

IN>OUT SYNC

OUT2

4

INPUT SELECT

TEMPORAL

2 3

STROBE SYNC

1

IN>OUT SYNC

IN1

+

RET1

3.2 AMP

OPEN

DETAIL B

P83862 M Sheet 4 of 23

1.4 TERMINAL IDENTIFICATION

b

Table 1: Terminal Identification

Balloon Identification Terminal Function/Description

Numbers (Figure 2) Identification Logic Board

1

2

3
4
5

6

7

8

9

10

11
Power Supply Board
12

13

14

IN1+,IN1- These terminals connect to the input voltage source (i.e. 12VDC or 24VDC

FACP). The FACP will supply a voltage from 9-30VDC at 5mA. During the
alarm condition these inputs will cause the designated outputs to drive the
notification appliances (designated outputs are set by output DIP switch banks).
During Stand-by on a FACP, a trouble condition on the designated loop will
cause these inputs to trip the FACP by opening the FACP loop. Alarm condition
always overrides trouble to drive output indicating appliances.

RET1+, RET1- EOLR is connected on these terminals corresponding to IN1+ and IN1-, or the

loop may be continued to other power supplies or appliances before terminating.
IN2+, IN2- Same as IN1+, IN1- for corresponding terminals.
RET2+, RET2- Same as RET1+, RET1- for corresponding terminals.
C “DRY1” NC Dry contacts are used to actuate the designated outputs. Contacts are normally

closed and actuate the power supply on contact Open. Designated outputs

correspond to IN1+,IN1-. NOTE: FACP NAC circuit cannot energize the power

supply by these contacts. NOTE: When these terminals are not in use, a jumper

must be connected across them.
C “DRY2” NC Operates the same as IN2+,IN2- for corresponding terminals. When these

terminals are not in use, a jumper must be connected across them.

+OUT1­+OUT2­+OUT3­+OUT4-

Indicating appliances are connected to these outputs (See Examples in Operation

Section). Each output can supply a maximum load of 2 AMPS and can be

individually programmed for Normal Mode, Temporal Mode, IN>OUT SYNC

Mode, or WHEELOCK SYNC Mode. The outputs can be configured as four

Class "B" circuits, two Class "A" circuits, or two Class "B" and one Class "A"

circuits. Each Class "A" or Class "B" circuit is 2 Amps. Outputs are controlled

by a designated input (INPUT 1 or 2) as selected by the DIP switch for that

output. NOTE: When the panel has been set to synchronization mode, IN1 is

used for strobe activation and IN2 is used for audible silence. Individual output

control is disabled.
“NC” “C” “NO
(COMMON

Typically used to trigger remote alerts or other reporting appliances. Form “C”

contacts rated 28VDC at 1 AMP.
TROUBLE
OUTPUT)
C “FAULT” NC
(COMMON
TROUBLE

Typically used to report AC or BAT Fail. An open circuit across this pair of

terminals will cause IN1 and IN2 to simultaneously signal a trouble condition to

the FACP.
INPUT)

- AUX + This output is capable of 50mA and can be reset by a momentary switch on the

logic board or can be reset remotely by using the NO “REMOTE”C terminals.
NO”REMOTE”C Dry contact closure on these terminals causes –AUX+ output to reset.

+BAT- Stand-by battery input. Use two 12VDC batteries connected in series for 24VDC

operation, or a single 12VDC battery for 12VDC operation.
BAT FAIL
NO, C, NC

Form “C” dry contacts used to signal low battery or loss of battery voltage. With

attery voltage present terminals NO, C are open, terminals C, NC are closed.
With no battery voltage present terminals NO, C are closed, terminals C, NC are
open. Form “C” contacts rated at 28VDC at 1 AMP.

AC FAIL
NO, C, NC

Form “C” dry contacts used to signal loss of AC voltage. With AC present
terminals NO, C are open, terminals C, NC are closed. With no AC present
terminals NO, C are closed, terminals C, NC are open. Form “C” contacts rated
at 28VDC at 1 AMP

P83862 M Sheet 5 of 23

Figure 2:

Terminal Locations

N

B
A

C

13

14

T

C

F
A

N

I

L

O

N

A

C

C

C

F
A

N

I

L

O

D

A

E

C

L

T

A

R

Y

O

O

U

P

B

T

L

I

E

O
N

OPEN = 24V SW1 CLOSED = 12V

J1

SW2

DC

SW1

10 11

_

AUX

NO "REMOTE" C

+

AUX
RESET

+

DC

+

BAT

-

AC

AC

AC

12

_

DC

+

ON

ON

ON

OFF

4

3

2

1

4

3

2

1

OUT1

INPUT SELECT

TEMPORAL
STROBE SYNC
IN>OUT SYNC

OUT2

INPUT SELECT

TEMPORAL
STROBE SYNC
IN>OUT SYNC

1

OUT3

OUT4

ON

ON

ON OFF

3

4

3

2

1

OUT1

4

3

2

1

INP1

5

OUT2

INP2

OUT3

OUT4

FAULT

C
N
"
T

L
U
A
F

"
C

O
N

C

C
N

9

8

+

OUT1

+

OUT2

_

+

OUT3

_

_

7

+

OUT4

_

_

IN1

IN1 IN2

+

RET1

_

RET1

+

2

+

RET2

IN2

+

4

_

RET2

C "DRY1" NC

_

C "DRY2" NC

6

UPPER

LOWER

P83862 M Sheet 6 of 23

1.5 LED STATUS

Table 2 lists status of the LED indicators. The ALARM condition occurs when the input causes the output circuits to energize.
TROUBLE condition occurs when the circuit is no longer supervised correctly. NOTE: An alarm condition overrides a trouble
condition.

Table 2: LED Status Description

LED

Logic Board

OUT1 STANDBY ALARM TROUBLE
OUT2 STANDBY ALARM TROUBLE
OUT3 STANDBY ALARM TROUBLE
OUT4 STANDBY ALARM TROUBLE
INP1 STANDBY ALARM TROUBLE
INP2 STANDBY ALARM TROUBLE
FAULT -------- TROUBLE --------

Power Supply Board

AC No AC AC Present -------­DC No DC DC Present --------

1.6 BATTERY MAINTENANCE

Battery Replacement: Power-Sonic (or equal) 12VDC, replace with new batteries every four (4) years or as needed if battery will
no longer accept full charge. Two 12V batteries are required for 24VDC setting. Use either a 7AH battery for 5 minutes of alarm
or a 12AH battery for 15 minutes of alarm.

NOTE: Battery compartment measures 4-1/2" High X 11-1/2" Wide X 4-1/2" Deep.

2.0 INSTALLATION INSTRUCTIONS

NOTE: The PS-12/24-8 POWERPATH shall be installed in accordance with the National Electrical Code (NEC) and all

applicable state and local regulations.

2.1 UNPACKING

The POWERPATH was carefully checked before leaving the factory. Inspect shipping container and unit carefully for
indications of improper handling. If damage is detected, make an immediate claim to the carrier.

Remove the POWERPATH from the shipping container and check that the door lock keys, door lock, and battery connection
wires are inside. Make sure the transformer, Power Board and Logic Board are securely mounted to the rear of the enclosure.

2.2 MOUNTING

WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS UNIT TO RAIN

OR MOISTURE.

CAUTION: This product is not intended for use in hazardous locations as defined by the National Electrical Code (NEC) and

by the National Fire Protection Association (NFPA).

Mount the POWERPATH in the desired location using the mounting dimensions in Figure 3.

Mount the panel in a location that does not exceed a temperature range of 0° C to 49° C (32° F to 120° F) and a humidity equal to
10% to 85% at 30° C (86° F) non-condensing.

When mounting on interior walls, use proper screw anchors in plaster. When mounting to concrete, especially when moisture is
expected, first attach a piece of ¾ inch plywood to the concrete surface. Attach the POWERPATH to the plywood.

CAUTION: The POWERPATH panel shall be mounted in a location within the environmental limits specified in the latest

UL Standard for indoor control panels.

OFF

ON

Blinking

-------- -------- --------

P83862 M Sheet 7 of 23

Figure 3:

TOP

Mounting Dimensions

LEFT

FRONT
VIEW

RIGHT
SIDESIDE

BOTTOM

NOTE: All dimensions shown are measured in inches.

P83862 M Sheet 8 of 23

2.3 WIRING

Review the Operation Section (3.0) in order to select the proper hookup and use of the POWERPATH

Set switches and wire the POWERPATH as follows: Terminal locations are shown in Figure 2.

A. Set Power Supply switch (SW1) for desired output voltage (Open for 24VDC, Closed for 12VDC). See Figure 1 (Detail A

and B).

B. Set output DIP Switch(s) to follow corresponding input (IN1, IN2) and desired output mode. See Table 3 DIP Switch

Selection and DIP Switch Settings Section (3.2).

C. Set Logic Board switches SW1 and SW2 to select Class “A” or Class “B” operation (Open for Class B, Closed for Class A).

See Figure 1 (Detail A and B).

CAUTION: The PS-12/24-8 POWERPATH can provide a full 8 AMPS of current during an alarm condition for 5 minutes
with a 7AH battery or 15 minutes with 12AH battery . (A 7AH or 12AH battery is required.). Exceeding these limits may result
in loss of power.

D. Connect notification appliances to desired outputs OUT1 – OUT4. See Operation Section (3.0).

• The POWERPATH has in-out wiring terminals that accept two #18 to #12 American Wire Gauge (AWG) wires at each

screw terminal. Strip leads 3/8 inches and connect to screw terminals.

• Separate all in-out wire runs on supervised circuits to insure integrity of circuit supervision. The polarity shown in the

wiring diagrams and on the circuit boards is for operation of the appliances. The polarity is reversed by the FACP during
supervision.

• Total load of any output circuit shall not exceed 2 AMPS.

• Terminate unused outputs with a 22K OHM EOLR.

E. Connect the indicating circuit(s) from the FACP to the desired input(s), IN1 and IN2. Connect End-of Line Resistors to

RET1 and RET2. Value is determined by FACP.

F. Connect desired auxiliary equipment to the auxiliary output terminals –AUX+.

CAUTION: For the Ground Fault Detection Circuit to operate, the 22K OHM RESISTOR/WIRE ASSEMBLY must remain
connected between (+) AUX and chassis ground as shown in Figure 1. If this connection is broken or disconnected, the Ground
Fault Detection Circuit will be DISABLED and ground faults will NOT result in a TROUBLE condition.

G. Select AC Trouble Delay Option. (Unit is factory set for 1 minute. Remove J1 for 6 hour delay.)

H. Connect trouble relays as desired.

I. Connect backup batteries. Observe correct polarity and voltage. For 12VDC, use a single 12V battery. For 24VDC, use two

of the same connected in series. Use either a 7AH battery for 5 minutes of alarm or a 12AH battery for 15 minutes of alarm.

J. Connect AC source. The AC must first be wired into the buildings main electrical power. The conduit entry can be either

from the top using knock-outs or right side in the transformer area. See Figure 3.

Table 3: DIP Switch Selection

Function Switch Position Description Note

INPUT
SELECT
TEMPORAL ON Generates Code 3 temporal signal on this output. 1

STROBE SYNC N/A Used only in the Wheelock sync mode. 2
IN>OUT SYNC ON Allows a sync signal on the input to be used by the output. -----­WHEELOCK
SYNC MODE

STROBE SYNC “ON”

IN>OUT SYNC “ON”

NOTE 1: Use only with appliances that can operate using a coded horn appliance. (Example: Wheelock Series CH, and Series

NOTE 2: Used to synchronize Wheelock Sync products in the Wheelock sync mode.

MT)

NOTE 3: Use only with Wheelock Series AS/AH, Series NS/NS4/NH, Series RSS, Series HS4 and products with SL/SLM

strobes.

P83862 M Sheet 9 of 23

ON

OFF

Selected output to be controlled by Input 1 (IN1+, IN1-) (DRY1)
Selected output to be controlled by Input 2 (IN2+, IN2-) (DRY2)

Generates Wheelock sync signal for synchronizing Wheelock
horns and strobes.

------

------

3

2.4 RELAY STATUS CONNECTIONS

POWER SUPPLY BOARD

WARNING: BAT FAIL AND AC FAIL CONTACTS MUST BE USED TO REPORT A TROUBLE CONDITION TO
THE FACP IN THE EVENT THAT AC OR BATTERY POWER FAILS. FAILURE TO DO THIS WILL CAUSE THE
PS-12/24-8 TO NOT REPORT ALL TROUBLE CONDITIONS. FIGURE 4 SHOWS A CIRCUIT THAT WILL
REPORT TROUBLE THROUGH THE IN1 AND/OR IN2 NAC CIRCUITS WHEN AC FAILS, BATTERY IS LOW OR
BATTERY IS NOT PRESENT.

BAT FAIL – When the battery (12VDC or 24VDC) is applied to the +DC- terminals, the NC C terminals on the BAT FAIL will
be shorted, and the C NO terminals will be open. If the battery is removed, is low or fails with AC power present the NC C
terminal will open and the C NO will short. The low battery condition is reported at approximately 21VDC (24VDC output
setting) or approximately 10.5VDC (12VDC output setting). Refer to Figure 4.

AC FAIL – When AC Power is applied the NC C terminals on the AC FAIL will be shorted, and the C NO terminals will be
open. If the AC Power is removed or fails with battery power present, the NC C terminals will open and the C NO will short after
1 minute or 6 hours depending on the condition of J1. (J1 in line = 1 minute. J1 removed = 6 hours.) Refer to Figure 4.

LOGIC BOARD

COMMON TROUBLE TERMINALS – The common trouble terminals are located on the right side of the Logic Board. The
bottom three terminals are labeled “ NC, C and NO”. When the PS-12/24-8 is operating normally the NC C terminals are shorted,
and the C NO terminals are open. There are two trouble conditions that will cause these terminals to change state.

• Supervision trouble on any output (+OUT1-, +OUT2-, +OUT3-, +OUT4-)

• Terminals C ”FAULT” NC open

NOTE: If terminals C “FAULT” NC are not used, a jumper shall be installed across the terminals.

Figure 4.

BAT FAIL/AC FAIL

BAT FAIL

NC C NO

NC C NO

AC FAIL

DETAIL A

DETAIL B

G

F

CLOSED

OPEN

C

NC C NO

NC C NO

DELAY OPTION

SW2

BAT FAIL

AC FAIL

AC TROUBLE

J1

DC

SW1

+

POWER SUPPLY

_

AUX

NO "REMOTE" C

+

AUX
RESET

LOGIC BOARD

_

OUT2

OUT1

+

A

OPEN = 24V SW1 CLOSED = 12V

+

DC

+

BAT

-

_

DC

OUT1

+

_

_

OUT4

OUT3

+

+

OUT3

4

INPUT SELECT

TEMPORAL

23

STROBE SYNC

1

IN>OUT SYNC

ON

OUT2

4

INPUT SELECT

TEMPORAL

23

STROBE SYNC

1

IN>OUT SYNC

ON

OFF

ON

_

IN1

+

RET1

IN1 IN2

+

4

23

1

OUT1

ON

OUT4

4

23

1

ON

ON OFF

_

_

IN2

+

_

_

RET2

RET2

RET1

+

AC

OUT2

INP1

C "DRY1" NC

C "DRY2" NC

AC

AC

OUT4

OUT3

FAULT

INP2

C "FAULT" NC

NO

C

NC

UPPER

LOWER

B

D

E

P83862 M Sheet 10 of 23

3.0 OPERATION

3.1 MODES OF OPERATION

The PS-12/24-8 POWERPATH can provide a 12 or 24VDC output when initiated by a 9 to 30VDC appliance (IN1 or IN2) or an
open contact (DRY1 or DRY2). The output will remain on until the deactivation of the input returns it to its normal mode.

The outputs can be configured as four Class “B” circuits, two Class “A” circuits, or two Class “B” and one Class “A” circuits.

Each Class "A" or Class "B" circuit is 2 Amps.

There are four output modes which can be used with either Class “A” or Class “B” circuits.

NORMAL MODE Used for a constant 12 or 24VDC output.

TEMPORAL MODE Provides a temporal output for appliances that can utilize a coded signal. (i.e. single

stroke bells and chimes and some horns) (NOTE: Do not use with Wheelock AS, NS,
RSS appliances.)

IN>OUT SYNC MODE Allows a coded signal or synchronization signal input to be utilized by the

POWERPATH. These appliances may come from a FACP, another PS-12/24-8 or a
Wheelock Synchronization Module (SM-12/24 or DSM-12/24). Audibles can also be
silenced.

WHEELOCK SYNC MODE Activates the built-in Wheelock Synchronization Mode for use with patented

synchronized horns and strobes. Audibles can also be silenced.

3.2 DIP SWITCH SETTINGS

The following is the DIP Switch settings for Output 1. Each of the remaining outputs is controlled similarly.

Figure 5:

Output DIP Switch(s)

OUT1-4

4

INPUT SELECT

3

TEMPORAL

2

STROBE SYNC

1

ON

MODE DIP SWITCH SETTING

NORMAL MODE INPUT SELECT (4) “ON” for “IN1” or “DRY1”
“OFF” for “IN2” or “DRY2”
TEMPORAL (3) “OFF”
STROBE SYNC (2) “OFF”
IN>OUT SYNC (1) “OFF”

TEMPORAL INPUT SELECT (4) “ON” for “IN1” or “DRY1”
“OFF” for “IN2” or “DRY2”
TEMPORAL (3) “ON”
STROBE SYNC (2) “OFF”
IN>OUT SYNC (1) “OFF”

IN>OUT SYNC INPUT SELECT (4) “ON” for “IN1” or “DRY1”
“OFF” for “IN2” or “DRY2”
TEMPORAL (3) “OFF”
STROBE SYNC (2) “OFF”
IN>OUT SYNC (1) “ON”

WHEELOCK SYNC INPUT SELECT (4) “ON” for “IN1” or “DRY1”
“OFF” for “IN2” or “DRY2”
TEMPORAL (3) “OFF”
STROBE SYNC (2) “ON”
IN>OUT SYNC (1) “ON”

IN>OUT SYNC

P83862 M Sheet 11 of 23

3.3 CLASS “B” OPERATION

Class “B” outputs can be controlled from either IN1 or IN2. Switches SW1 and SW2 on the Logic Board are in the “OPEN”
position.

The following are examples of Class “B” connections. A FACP is used as a representative input.

• IN1 and/or IN2 can be used for connection to the FACP. The INPUT SELECT Switch (4) selects which input is to be used

to activate the output.

• Logic Board switches SW1 and SW2 control Class “A” or Class “B” configuration. SW1 controls Outputs 1 and 3. SW2

controls Outputs 2 and 4.

• The PS-12/24-8 requires a 22K OHM EOLR on each output for proper supervision. Use two 22K OHM EOLR’s when two

Class “B” outputs are paralleled.

Example 1: NORMAL MODE (CLASS B)

OUT1

OUT2

OUT3

OUT4

+

TO NEXT APPLIANCE
OR EOLR

-

+

(2.2K OHMS)

TO NEXT APPLIANCE
OR EOLR

-

+

(2.2K OHMS)

TO NEXT APPLIANCE
OR EOLR

-

+

(2.2K OHMS)

TO NEXT APPLIANCE
OR EOLR

-

(2.2K OHMS)

OUT1-4

4

INPUT SELECT

3

TEMPORAL

2

ON

STROBE SYNC

1

IN>OUT SYNC

+

IN1

-

F
A
C

TO NEXT APPLIANCE
OR EOLR

+

RET1

-

POWERPATH

P

LOGIC BOARD

SWI "OPEN"
SW2 "OPEN"

LEGEND

STROBE

Example 2: TEMPORAL MODE (CLASS B)

OUT1

4

INPUT SELECT
TEMPORAL

23

ON

ON

STROBE SYNC

1

IN>OUT SYNC

OUT2-4

4

INPUT SELECT

3

TEMPORAL

2

STROBE SYNC

1

IN>OUT SYNC

F
A
C

TO NEXT APPLIANCE
OR EOLR

+

IN1

-

+

RET1

-

POWERPATH

P

LOGIC BOARD

SWI "OPEN"
SW2 "OPEN"

OUT1

OUT2

OUT3

OUT4

+

-

+

-

+

-

+

-

EOLR

2.2K OHMS

EOLR

2.2K OHMS

AUDIBLE

TO NEXT APPLIANCE
OR EOLR

(2.2K OHMS)

TO NEXT APPLIANCE
OR EOLR

(2.2K OHMS)

CAUTION: Strobes require constant voltage and will not operate properly in the TEMPORAL MODE. A second output set
in the NORMAL MODE will provide the constant voltage.

CAUTION: Only use audible appliances that can use a coded signal. Do not use with Wheelock Series AS/AH or
NS/NS4/NH appliances.

P83862 M Sheet 12 of 23

Example 3: IN>OUT SYNC MODE from CODED INPUT SOURCE (CLASS B)

F
A
C

P

CODED

TO NEXT APPLIANCE
OR EOLR

CONSTANT

TO NEXT APPLIANCE
OR EOLR

+

IN1

-

+

RET1

-

+

IN2

-

POWERPATH

+

RET2

-

ON

ON

OUT1

4

INPUT SELECT
TEMPORAL

23

STROBE SYNC

1

IN>OUT SYNC

OUT2-4

4

INPUT SELECT

3

TEMPORAL

2

STROBE SYNC

1

IN>OUT SYNC

OUT1

OUT2

OUT3

+

-

+

-

+

EOLR

-

2.2K OHMS

TO NEXT APPLIANCE
OR EOLR

(2.2K OHMS)

TO NEXT APPLIANCE
OR EOLR

(2.2K OHMS)

LOGIC BOARD
SWI "OPEN"
SW2 "OPEN"

OUT4

+

-

EOLR

2.2K OHMS

CAUTION: Strobes require constant voltage and will not operate properly in the IN>OUT SYNC MODE with a coded input
source. A second constant input with a second output set in the NORMAL MODE will provide the constant voltage.

CAUTION: Only use audible appliances that can use a coded signal. Do not use with Wheelock Series AS/AH or
NS/NS4/NH appliances.

Example 4: IN>OUT SYNC MODE with External Sync Module without Audible Silence (CLASS B)

SM/DSM

OUT1

OUT2

OUT3

+

-

+

-

+

-

TO NEXT APPLIANCE
OR EOLR

(2.2K OHMS)

EOLR

2.2K OHMS

EOLR

2.2K OHMS

F
A
C

P

+ OUT1

+ IN1

MINUS 1

+ AUDIBLE

- AUDIBLE

TO NEXT APPLIANCE
OR EOLR

ON

OUT1-4

4

INPUT SELECT

TEMPORAL

2 3

STROBE SYNC

1

IN>OUT SYNC

+

IN1

-

+

RET1

-

POWERPATH

LOGIC BOARD
SWI "OPEN"
SW2 "OPEN"

OUT4

+

-

EOLR

2.2K OHMS

NOTE: When using the Wheelock external Sync Module (SM or DSM), synchronization will only occur

with Wheelock sync

appliances.

P83862 M Sheet 13 of 23

Example 5: IN>OUT SYNC MODE with External Sync Module with Audible Silence (CLASS B)

F
A
C

P

SM/DSM

+ OUT1

+ IN1

MINUS 1

+ AUDIBLE

EOLR

- AUDIBLE

TO NEXT
APPLIANCE
OR EOLR

OUT1-4

4

ON

INPUT SELECT

TEMPORAL

2 3

STROBE SYNC

1

IN>OUT SYNC

+

IN1

-

+

RET1

-

POWERPATH

LOGIC BOARD
SWI "OPEN"
SW2 "OPEN"

OUT1

OUT2

OUT3

OUT4

+

-

+

-

+

-

+

-

EOLR

2.2K OHMS

EOLR

2.2K OHMS

EOLR

2.2K OHMS

NOTE: When using the Wheelock external Sync Module (SM or DSM), synchronization will only occur
appliances.

Example 6: WHEELOCK SYNC MODE without Audible Silence (CLASS B)

TO NEXT APPLIANCE
OR EOLR

(2.2K OHMS)

with Wheelock sync

OUT1

OUT2

+

-

+

-

TO NEXT APPLIANCE
OR EOLR

(2.2K OHMS)

EOLR

2.2K OHMS

F

+

-

-

+

IN1

RET1

ON

OUT1-4

4

INPUT SELECT

TEMPORAL

2 3

STROBE SYNC

1

IN>OUT SYNC

A

POWERPATH

C
P

+

IN2

­+

TO NEXT APPLIANCE

RET2

OR EOLR

-

LOGIC BOARD

SWI "OPEN"
SW2 "OPEN"

• This mode will only synchronize Wheelock horns, horn strobes, and strobes with the synchronization capability.

• If only strobes are connected to the POWERPATH outputs, the initiating input to IN2 is not required.

• When synchronized horns are used on the two wire output of the POWERPATH, IN2 must be connected as shown or the

horns will not operate.

OUT3

OUT4

+

-

+

-

EOLR

2.2K OHMS

EOLR

2.2K OHMS

P83862 M Sheet 14 of 23

Example 7: WHEELOCK SYNC MODE with Audible Silence (CLASS B)

F
A
C

P

TO NEXT APPLIANCE
OR EOLR

AUDIBLE
SILENCE

TO NEXT APPLIANCE
OR EOLR

+

IN1

-

+

-

RET1

ON

OUT1-4

4

INPUT SELECT

TEMPORAL

2 3

STROBE SYNC

1

IN>OUT SYNC

POWERPATH

+

IN2

-

+

RET2

-

LOGIC BOARD

SWI "OPEN"
SW2 "OPEN"

OUT1

OUT2

OUT3

OUT4

+

TO NEXT APPLIANCE
OR EOLR

-

+

-

+

-

+

-

EOLR

2.2K OHMS

EOLR

2.2K OHMS

EOLR

2.2K OHMS

(2.2K OHMS)

• This mode will only synchronize Wheelock horns, horn strobes, and strobes with the synchronization capability.

3.4 CLASS “A” OPERATION

Class “A” circuit 1 uses “OUT1” and “OUT3”. Class “A” circuit 2 uses “OUT2” and “OUT4”. When operating in Class “A” the
two circuits must have the same switch settings for the operational mode selected. Switches SW1 and SW2 on the logic board are
in the “CLOSED” position.

• IN1 and/or IN2 can be used for connection to the FACP. The INPUT SELECT Switch (4) selects which input is to be used

to activate the output.

• Logic Board switches SW1 and SW2 control Class “A” or Class “B” configuration. SW1 controls Outputs 1 and 3. SW2

controls Outputs 2 and 4.

• DIP Switch settings for each circuit in the Class “A” output must be set identically.

Example 8: NORMAL MODE (CLASS A)

F
A

TO NEXT APPLIANCE
OR EOLR
OR RETURN
TO FACP
(CLASS "A")

+

IN1

-

+

RET1

-

ON

OUT1-4

4

INPUT SELECT

3

TEMPORAL

2

STROBE SYNC

1

IN>OUT SYNC

OUT1

OUT2

+

-

+

-

POWERPATH

C

OUT3

­+

P

LOGIC BOARD
SWI "CLOSED"
SW2 "CLOSED"

P83862 M Sheet 15 of 23

OUT4

­+

Example 9: TEMPORAL MODE (CLASS A)

F
A
C

TO NEXT APPLIANCE
OR EOLR
OR RETURN
TO FACP
(CLASS "A")

OUT1 OUT3

ON

ON

4

INPUT SELECT

3

TEMPORAL

2

STROBE SYNC

1

IN>OUT SYNC

OUT2

4

3

2

1

ON

OUT4

ON

+

IN1

-

+

RET1

-

POWERPATH

4

3

2

1

4

3

2

1

OUT1

OUT2

OUT3

+

-

+

-

-

+

P

LOGIC BOARD
SWI "CLOSED"
SW2 "CLOSED"

CAUTION: Strobes require constant voltage and will not operate properly in the TEMPORAL MODE. A second Class “A”
output set in the NORMAL MODE will provide the constant voltage for the strobe circuit. Only use sounding appliances that can
use a coded signal. Do not use Wheelock AS/AH or NS/NS4/NH appliances with TEMPORAL MODE.

Example 10: IN>OUT SYNC MODE from CODED INPUT SOURCE (CLASS A)

OUT4

-

+

F
A
C

P

CODED

TO NEXT APPLIANCE
OR EOLR
OR RETURN
TO FACP
(CLASS "A")

CONSTANT

TO NEXT APPLIANCE
OR EOLR
OR RETURN
TO FACP
(CLASS "A")

+

IN1

-

+

RET1

-

+

IN2

-

+

RET2

-

LOGIC BOARD
SWI "CLOSED"

OUT1 OUT3

ON

ON

4

INPUT SELECT

3

TEMPORAL

2

STROBE SYNC

1

IN>OUT SYNC

OUT2

4

3
2
1

OUT4

4

OUT1

3
2
1

ON

OUT2

4

3
2
1

ON

OUT3

POWERPATH

OUT4

+

-

+

-

­+

­+

SW2 "CLOSED"

CAUTION: Strobes require constant voltage and will not operate properly in the IN>OUT SYNC MODE with a coded input.
A second Class “A” output set in the NORMAL MODE will provide the constant voltage for the strobe circuit. Only use audible
appliances that can use a coded signal. Do not use Wheelock AS/AH or NS/NS4/NH appliances with a coded input.

P83862 M Sheet 16 of 23

Example 11: IN>OUT SYNC MODE with External Sync Module without Audible Silence (CLASS A)

SM/DSM

F
A
C

P

+ OUT1

+ IN1

MINUS 1

+ AUDIBLE

- AUDIBLE

TO NEXT APPLIANCE
OR EOLR

+

IN1

-

+

RET1

-

POWERPATH

ON

OUT1-4

4

INPUT SELECT

3

TEMPORAL

2

STROBE SYNC

1

IN>OUT SYNC

OUT1

OUT2

OUT3

+

-

+

-

-

+

LOGIC BOARD
SWI "CLOSED"
SW2 "CLOSED"

OUT4

-

+

NOTE: When using the Wheelock external Sync Module (SM or DSM), synchronization will only occur

with Wheelock sync

appliances.

Example 12: IN>OUT SYNC MODE with External Sync Module with Audible Silence (CLASS A)

SM/DSM

F
A
C

P

AUDI BLE

SILENCE

EOLR

+ OUT1

+ IN1

MINUS 1

+ AUDIBLE

- AUDIBLE

TO NEXT APPLIANCE
OR EOLR

+

IN1

-

+

RET1

-

POWERPATH

ON

OUT1-4

4

INPUT SELECT

3

TEMPORAL

2

STROBE SYNC

1

IN>OUT SYNC

OUT1

OUT2

OUT3

+

-

+

-

­+

LOGIC BOARD
SWI "CLOSED"
SW2 "CLOSED"

OUT4

­+

NOTE: When using the Wheelock external Sync Module (SM or DSM), synchronization will only occur

with Wheelock sync

appliances.

P83862 M Sheet 17 of 23

Example 13: WHEELOCK SYNC MODE without Audible Silence (CLASS A)

F
A
C

P

TO NEXT APPLIANCE
OR EOLR
OR RETURN
TO FACP
(CLASS "A")

OUT1-4

4

INPUT SELECT

3

TEMPORAL

2

ON

STROBE SYNC

1

IN>OUT SYNC

+

-

­+

IN1

RET1

POWERPATH

+

IN2

-

-

RET2

+

LOGIC BOARD

SWI "CLOSED"

OUT1

OUT2

OUT3

OUT4

+

-

+

-

­+

­+

SW2 "CLOSED"

• This mode will only synchronize Wheelock horns, horn strobes, and strobes with the synchronization capability.

• If only strobes are connected to the POWERPATH outputs, the initiating input to IN2 is not required.

• When synchronized horns are used on the two wire output of the POWERPATH, IN2 must be connected as shown or the

horns will not operate.

Example 14: WHEELOCK SYNC MODE with Audible Silence (CLASS A)

+

F
A
C

P

TO NEXT APPLIANCE
OR EOLR
OR RETURN
TO FACP
(CLASS "A")

AUDIBLE SIL ENCE

TO NEXT APPLIANCE
OR EOLR
OR RETURN
TO FACP
(CLASS "A")

IN1

-

+

RET1

-

POWERPATH

+

IN2

-

+

RET2

-

LOGIC BOARD
SWI "CLOSED"

ON

OUT1-4

4

INPUT SELECT

3

TEMPORAL

2

STROBE SYNC

1

IN>OUT SYNC

OUT1

OUT2

OUT3

OUT4

+

-

+

-

-

+

-

+

SW2 "CLOSED"

• This mode will only synchronize Wheelock horns, horn strobes, and strobes with the synchronization capability.

COMBINATION CLASS “A” AND CLASS “B” HOOKUP

The PS-12/24-8 POWERPATH can be configured to have one Class “A” (2 Amps) and two Class “B” (2 Amps each circuit)
Outputs at the same time. This is done by opening or closing switches SW1 and SW2 on the logic board. NOTE: When SW1 is
“Closed”, OUTPUTS 1 and 3 are the Class “A” circuit. When SW2 is “Closed”, OUTPUTS 2 and 4 are the Class “A” circuit.

COMBINATION OF MODES

• In Class “B” configuration, each output can be set to an independent mode as desired.

• In Class “B”, IN1 or IN2 can be selected to activate any of the outputs desired.

• In Class “A”, OUTPUT DIP Switches must be set identically for each Class “A” output.

P83862 M Sheet 18 of 23

3.5 MASTER REMOTE OPERATION:

NOTE 2

Example 15: Synchronized Multiple PS-12/24-8 Using a Master PS-12/24-8 (in the WHEELOCK SYNC
MODE) Without Audible Silence, and Using Input #1.

FACP

NAC Input in
Alarm Condition

NOTE 1

_

AUX

+

AUX
RESET

­+

SW1

SW2

MASTER

NO "REMOTE" C

_

DC

OUT1

+

OUT3

4

INPUT SELECT

TEMPORAL

2 3

STROBE SYNC

1

IN>OUT SYNC

ON

OUT2

4

INPUT SELECT

TEMPORAL

2 3

STROBE SYNC

1

IN>OUT SYNC

ON

OFF

ON

+

OUT4

-

ON

ON

ON OFF

JUMPERS

4

2 3

1

OUT1

4

2 3

1

INP1

OUT2

OUT4

OUT3

FAULT

INP2

C "FAULT" NC

NO

C

NC

NOTE 3

NOTE 5

_

_

OUT2

OUT1

+

OUT3

+

+

NOTE 4

_

AUX

NO "REMOTE" C

+

AUX
RESET

REMOTE

SW1

SW2

_

_

IN1

+

OUT4

+

RET1

-

+

_

DC

OUT1

+

4

INPUT SELECT

2 3

STROBE SYNC

1

IN>OUT SYNC

ON

OUT2

4

INPUT SELECT

2 3

STROBE SYNC

1

IN>OUT SYNC

ON

OFF

ON

+

IN1 IN2

+

TEMPORAL

TEMPORAL

_

_

IN2

+

_

_

RET2

RET2

RET1

+

FACP
EOLR

NOTE 6

OUT3

4

2 3

1

OUT1

ON

OUT4

4

2 3

1

ON

ON OFF

-

C "DRY1" NC

C "DRY2" NC

OUT2

INP1

UPPER

LOWER

OUT4

OUT3

FAULT

INP2

C "FAULT" NC

NO

C

NC

NOTE 5

_

_

OUT2

OUT1

+

OUT3

+

+

_

_

IN1

+

OUT4

+

RET1

+

IN1 IN2

+

-

_

_

IN2

+

_

_

RET2

RET2

RET1

+

C "DRY1" NC

C "DRY2" NC

UPPER
LOWER

NOTE 6

_

AUX

+

AUX
RESET

REMOTE

SW1

SW2

NO "REMOTE" C

_

DC

OUT1

+

OUT3

4

INPUT SELECT

TEMPORAL

2 3

STROBE SYNC

1

IN>OUT SYNC

ON

OUT2

4

INPUT SELECT

TEMPORAL

2 3

STROBE SYNC

1

IN>OUT SYNC

ON

OFF

ON

+

4

2 3

1

OUT1

ON

OUT4

4

2 3

1

ON

ON OFF

INP1

-

OUT2

OUT4

OUT3

FAULT

INP2

C "FAULT" NC

NO

C

NC

NOTE 5

+

+

_

_

OUT2 OUT3

OUT1

+

_

_

IN1

+

OUT4

+

RET1

ADDITIONAL PS-12/24-8
APPLIANCES OR

2.2K OHM EOLR

IN1 IN2

+

_

_

IN2

+

_

_

RET2

RET2

RET1

+

C "DRY1" NC

C "DRY2" NC

UPPER
LOWER

NOTE 1: NAC Input Voltage 9.0 to 30.0VDC Constant.
NOTE 2: OBSERVE DIP SWITCH SETTINGS

Input Selection Switch (Position 1) on OUT1 to OUT4 DIP Switches are shown in the "ON"
Position allowing Input #1 to activate Outputs 1-4, Positions 2-4 are set for "WHEELOCK SYNC MODE"

NOTE 3: Jumper "RET 1-" to "IN 2-" and "RET 1+" to "IN 2+ " only on the Master PS-12/24-8.
NOTE 4: Diagram shown with an output circuit (OUT4) on Master PowerPath used to synchronized the Remote PowerPaths. In

this configuration the Master PowerPath can only have three NAC circuits.

NOTE 5: Jumpers must be placed across "DRY 1" and "DRY 2" terminals when operating Power Supply using "IN 1" or "IN 2".
NOTE 6: OBSERVE DIP SWITCH SETTINGS

Input Selection Switch (Position 1) on OUT 1 to OUT 4 DIP Switches are shown in the "ON" Position allowing Input
#1 to activate Outputs 1-4. Positions 2-4 are set for "IN>OUT SYNC MODE".

P83862 M Sheet 19 of 23

Example 16: Synchronized Multiple PS-12/24-8 Using a Master PS-12/24-8 (in the WHEELOCK SYNC
MODE) With Audible Silence, and Using Input #1.

absolutely

NOTE 2

FACP

Programmed Audible
Silence NAC

NOTE 1

NAC Input in
Alarm Condition

_

AUX

+

-

+

AUX
RESET

MASTER

-

+

SW1SW2

_

OUT2

OUT1

+

+

_

AUX

+

AUX
RESET

REMOTE

SW1

SW2

_

OUT2

OUT1

+

+

_

AUX

+

AUX
RESET

REMOTE

SW1SW2

_

OUT2 OUT3

OUT1

+

+

NO "REMOTE" C

_

NOTE 3

NO "REMOTE" C

_

NO "REMOTE" C

_

_

DC

OUT1

+

OUT3

4

INPUT SELECT

TEMPORAL

2 3

STROBE SYNC

1

IN>OUT SYNC

ON

OUT2

4

INPUT SELECT

TEMPORAL

2 3

STROBE SYNC

1

IN>OUT SYNC

ON

OFF

ON

+

4

2 3

1

OUT1

ON

OUT4

4

2 3

1

ON

ON OFF

INP1

-

OUT2

OUT4

OUT3

FAULT

INP2

C "FAULT" NC

NO

C

NC

NOTE 5

_

_

OUT3

+

IN1

+

OUT4

+

RET1

-

+

FACP
EOLR

+

_

IN1 IN2

RET1

_

IN2

+

_

_

RET2

RET2

+

FACP
EOLR

C "DRY1" NC

C "DRY2" NC

UPPER
LOWER

NOTE 4

_

DC

OUT1

+

OUT3

4

INPUT SELECT

TEMPORAL

2 3

STROBE SYNC

1

IN>OUT SYNC

ON

OUT2

4

INPUT SELECT

TEMPORAL

2 3

STROBE SYNC

1

IN>OUT SYNC

ON

OFF

ON

+

4

2 3

1

OUT1

ON

OUT4

4

2 3

1

ON

ON OFF

INP1

-

OUT2

OUT4

OUT3

FAULT

INP2

C "FAULT" NC

NO

C

NC

NOTE 5

_

_

IN1

+

OUT4

OUT3

+

+

RET1

+

IN1 IN2

+

_

_

IN2

+

_

_

RET2

RET2

RET1

+

C "DRY1" NC

C "DRY2" NC

UPPER
LOWER

-

NOTE 4

_

DC

OUT1

+

OUT3

4

INPUT SELECT

TEMPORAL

2 3

STROBE SYNC

1

IN>OUT SYNC

ON

OUT2

4

INPUT SELECT

TEMPORAL

2 3

STROBE SYNC

1

IN>OUT SYNC

ON

OFF

ON

+

4

2 3

1

OUT1

ON

OUT4

4

2 3

1

ON

ON OFF

INP1

-

OUT2

OUT4

OUT3

FAULT

INP2

C "FAULT" NC

NO

C

NC

NOTE 5

_

_

IN1

+

OUT4

+

+

RET1

+

_

IN1 IN2

RET1

_

IN2

+

_

_

RET2

RET2

+

C "DRY1" NC

C "DRY2" NC

UPPER
LOWER

ADDITION AL PS-12/24-8 ,
APPLIACES OR

NOTE 1: NAC Input Voltage 9.0 to 30.0VDC Constant.
NOTE 2: OBSERVE DIP SWITCH SETTINGS

Input Selection Switch (Position 1) on OUT1 to OUT4 DIP Switches are shown in the "ON"
Position allowing Input #1 to activate Outputs 1-4, Positions 2-4 are set for "WHEELOCK SYNC MODE"

NOTE 3: Diagram shown with an output circuit (OUT4) on Master PowerPath used to synchronize the Remote PowerPaths. In

this configuration the Master PowerPath can only have three NAC circuits.

NOTE 4: OBSERVE DIP SWITCH SETTINGS

Input Selection Switch (Position 1) on OUT 1 to OUT 4 DIP Switches are shown in the "ON" Position allowing Input
#1 to activate Outputs 1-4. Positions 2-4 are set for "IN>OUT SYNC MODE".

NOTE 5: Jumpers must be placed across “DRY1” and “DRY2” terminals when operating Power Supply using “IN1” or “IN2”.

P83862 M Sheet 20 of 23

4.0 TROUBLESHOOTING

WARNING: THE PS-12/24-8 POWERPATH CONTAINS VOLTAGES THAT CAN CAUSE DEATH OR SERIOUS
INJURY. ALWAYS OBSERVE PROPER ELECTRICAL SAFETY PRECAUTIONS AND WARNINGS.

Always follow good troubleshooting procedures:

• When trouble occurs, observe all visual indications and note them.

• If the problem is obvious or it can be located on the Troubleshooting Table, note it.

• Always de-energize the POWERPATH completely (Remove both AC and DC power) before making changes to switch

settings or repairs.

NOTE: Changes in switch settings will not take affect until all power is removed and then restored to the POWERPATH.

• While the POWERPATH is de-energized, perform a visual and hands on check of all terminals and wires to ensure proper

termination.

Table 4: Troubleshooting

Trouble Cause Action

INP1, INP2 LED’s do not light in
ALARM
INP1, INP2 LED’s Flashing Trouble on input Check input supervision Voltage.

OUT1,OUT2,OUT3,OUT4 LED’s
do not light in ALARM
FAULT LED Flashing INP1 INP2 trouble

AC LED OFF No AC power input Check AC Power Source.
DC LED OFF No DC output Check wiring to the battery.

AC FAIL relay energizes
(indication in remote location)
No audible output in WHEELOCK
SYNC MODE
Horn, horn strobes, or strobes do
not synchronize

CLASS “A” circuit is not
functioning properly

CLASS “B” circuit is not
functioning properly

BAT FAIL relay does not change
state within 5 minutes.

No input signal on terminals

Check input and input wiring.

IN1+IN1-, IN2+IN2-

Check input EOLR.

No output Check INPUT SELECT DIP Switch on

corresponding OUTPUT DIP Switch.

Check inputs. (If LED’s INP1 or INP2
OUT1,OUT2,OUT3,OUT4
Trouble
C “FAULT” NC terminals
OPEN

flashing.)

Check outputs (if LED’s OUT1, OUT2,

OUT3, OUT4 flashing).

Check circuit connected to C “FAULT”

NC terminals.

Check wiring to AC power source.
No AC power Check AC power source.

No input to IN2+,IN2- See Example 13 and 14 for proper

input connections.
Improper MODE selection
Improper appliances

Check MODE selection.

Check appliances to ensure proper type

for synchronization. For IN>OUT

MODE check input appliance (DSM,

SM or PS-12/24-8).
Improper MODE selection or
SW1/SW2 setting

Check to be certain MODE selection is

identical for each CLASS “A” output

circuit. CLASS “A” OUT1 uses outputs

1 and 3. Class “A” OUT2 uses outputs

2 and 4.

Check SW1 and SW2 on Logic Board

for “CLOSED” position.
Improper MODE selection or
SW1/SW2 setting

Power Supply voltage
improperly set.

Check for proper MODE selection.

Check SW1 and SW2 on Logic Board

for “OPEN” position.

Set Potentiometer on Power Supply

Board to 28.0VDC for 24VDC

applications and 14.0VDC for 12VDC

applications.

P83862 M Sheet 21 of 23

5.0 WHEELOCK INC. COMPATIBLE APPLIANCES

The Following is a list of appliances produced by Wheelock that are compatible with the PS-12/24-8 POWERPATH.

SYNCHRONIZING HORNS

AH-12 AH-24
AH-12WP AH-24WP
NH-12/24 ----------

SYNCHRONIZING HORN STROBES
AS-1215W AS-121575W
AS-2415W AS-241575W
AS-2430W AS-2475W
AS-24110W AS-2415C
AS-2430C AS-2475C
AS-24100C AS-24MCW
ASWP-2475W ---------­NS-1215W NS-121575W
NS-2415W NS-241575W
NS-2430W NS-2475W
NS-24110W NS-24MCW

---------- NS4-241575W

---------- NS4-24MCW

SYNCHRONIZING STROBES
RSS-1215W RSS-121575W
RSS-2415W RSS-241575W
RSS-2430W RSS-2475W
RSS-24110W RSS-2415C
RSS-2430C RSS-2475C
RSS-24100C RSS-24MCW

APPLIANCES WITH SYNCHRONIZING STROBES
MT-24-SLM CH70-24MCW
CH70-2415W CH70-241575W
CH70-2430W CH70-2475W
CH70-24110W CH70-24MCW
CH90-24100C CH90-2475C
E70-2415W E70-24MCW
E70-2430W E70-241575W
E70-24110W E70-2475W
E90-2430C E90-2415C
E90-24100C E90-2475C
ET70-2415W ET70-24MCW
ET70-2430W ET70-241575W
ET70-24110W ET70-2475W
ET90-2430C ET70-24MCW
ET90-24100C ET90-2415C
SA-70-24-SL ET90-2475C
SA-90-24-SL SA-70-SLM

CODED AUDIBLE APPLIANCES
MIZ-12 MIZ-24
MT-12-LS MT-12/24
MT-24-LS MT-12-LSM
MT-24-MS MT-24-LSM
MT-12-SLM MT-24-IS
CH70 MT-24-SLM
CH70-2415W CH90
CH70-2430W CH70-241575W
CH70-24110W CH70-2475W
CH90-24100C CH90-2475C
CSX10-24-DC CSXG10-24-DC

NON-SYNCHRONIZING APPLIANCES

MIZ-TC12 MIZ-TC24

P83862 M Sheet 22 of 23

ANY MATERIAL EXTRAPOLATED FROM THIS DOCUMENT OR FROM WHEELOCK MANUALS OR OTHER
DOCUMENTS DESCRIBING THE PRODUCT FOR USE IN PROMOTIONAL OR ADVERTISING CLAIMS, OR
FOR ANY OTHER USE, INCLUDING DESCRIPTION OF THE PRODUCT’S APPLICATION, OPERATION.
INSTALLATION AND TESTING IS USED AT THE SOLE RISK OF THE USER, AND WHEELOCK WILL NOT
HAVE ANY LIABILITY FOR SUCH USE.

6.0 WARRANTY STATEMENT

Limited Warranty

Wheelock products must be used within their published specifications and must be PROPERLY specified, applied, installed,
operated, maintained and operationally tested in accordance with these instructions at the time of installation and at least twice a
year or more often and in accordance with local, state and federal codes, regulations and laws. Specification, application,
installation, operation, maintenance and testing must be performed by qualified personnel for proper operation in accordance with
all of the latest National Fire Protection Association (NFPA), Underwriters' Laboratories (UL), Underwriters’ Laboratories of
Canada (ULC), National Electrical Code (NEC), Occupational Safety and Health Administration (OSHA), local, state, county,
province, district, federal and other applicable building and fire standards, guidelines, regulations, laws and codes including, but
not limited to, all appendices and amendments and the requirements of the local authority having jurisdiction (AHJ). Wheelock
products when properly specified, applied, installed, operated, maintained and operationally tested as provided above are
warranted against mechanical and electrical defects for a period of three years from date of manufacture (as determined by date
code). Correction of defects by repair or replacement shall be at Wheelock's sole discretion and shall constitute fulfillment of all
obligations under this warranty. THE FOREGOING LIMITED WARRANTY SHALL IMMEDIATELY TERMINATE IN THE
EVENT ANY PART NOT FURNISHED BY WHEELOCK IS INSTALLED IN THE PRODUCT. THE FOREGOING
LIMITED WARRANTY SPECIFICALLY EXCLUDES ANY SOFTWARE REQUIRED FOR THE OPERATION OF OR
INCLUDED IN A PRODUCT. WHEELOCK MAKES NO REPRESENTATION OR WARRANTY OF ANY OTHER KIND,
EXPRESS, IMPLIED OR STATUTORY WHETHER AS TO MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE OR ANY OTHER MATTER.

USERS ARE SOLELY RESPONSIBLE FOR DETERMINING WHETHER A PRODUCT IS SUITABLE FOR THE USER'S
PURPOSES, OR WHETHER IT WILL ACHIEVE THE USER'S INTENDED RESULTS. THERE IS NO WARRANTY
AGAINST DAMAGE RESULTING FROM MISAPPLICATION, IMPROPER SPECIFICATION, ABUSE, ACCIDENT OR
OTHER OPERATING CONDITIONS BEYOND WHEELOCK'S CONTROL.

SOME WHEELOCK PRODUCTS CONTAIN SOFTWARE. WITH RESPECT TO THOSE PRODUCTS, WHEELOCK DOES
NOT WARRANTY THAT THE OPERATION OF THE SOFTWARE WILL BE UNINTERRUPTED OR ERROR-FREE OR
THAT THE SOFTWARE WILL MEET ANY OTHER STANDARD OF PERFORMANCE, OR THAT THE FUNCTIONS OR
PERFORMANCE OF THE SOFTWARE WILL MEET THE USER'S REQUIREMENTS. WHEELOCK SHALL NOT BE
LIABLE FOR ANY DELAYS, BREAKDOWNS, INTERRUPTIONS, LOSS, DESTRUCTION, ALTERATION, OR OTHER
PROBLEMS IN THE USE OF A PRODUCT ARISING OUT OF OR CAUSED BY THE SOFTWARE.

THE LIABILITY OF WHEELOCK ARISING OUT OF THE SUPPLYING OF A PRODUCT, OR ITS USE, WHETHER ON
WARRANTIES, NEGLIGENCE, OR OTHERWISE, SHALL NOT IN ANY CASE EXCEED THE COST OF CORRECTING
DEFECTS AS STATED IN THE LIMITED WARRANTY AND UPON EXPIRATION OF THE WARRANTY PERIOD ALL
SUCH LIABILITY SHALL TERMINATE. WHEELOCK IS NOT LIABLE FOR LABOR COSTS INCURRED IN
REMOVAL, REINSTALLATION OR REPAIR OF THE PRODUCT BY ANYONE OTHER THAN WHEELOCK OR FOR
DAMAGE OF ANY TYPE WHATSOEVER, INCLUDING BUT NOT LIMITED TO, LOSS OF PROFIT OR INCIDENTAL
OR CONSEQUENTIAL DAMAGES. THE FOREGOING SHALL CONSTITUTE THE SOLE REMEDY OF THE
PURCHASER AND THE EXCLUSIVE LIABILITY OF WHEELOCK.

IN NO CASE WILL WHEELOCK'S LIABILITY EXCEED THE PURCHASE PRICE PAID FOR A PRODUCT.

Limitation of Liability

WHEELOCK'S LIABILITY ON ANY CLAIM OF ANY KIND, INCLUDING NEGLIGENCE AND BREACH OF
WARRANTY, FOR ANY LOSS OR DAMAGE RESULTING FROM, ARISING OUT OF, OR CONNECTED WITH THIS
CONTRACT, OR FROM THE MANUFACTURE, SALE, DELIVERY, RESALE, REPAIR OR USE OF ANY PRODUCT
COVERED BY THIS ORDER SHALL BE LIMITED TO THE PRICE APPLICABLE TO THE PRODUCT OR PART
THEREOF WHICH GIVES RISE TO THE CLAIM. WHEELOCK'S LIABILITY ON ANY CLAIM OF ANY KIND SHALL
CEASE IMMEDIATELY UPON THE INSTALLATION IN THE PRODUCT OF ANY PART NOT FURNISHED BY
WHEELOCK. IN NO EVENT SHALL WHEELOCK BE LIABLE FOR ANY CLAIM OF ANY KIND UNLESS IT IS
PROVEN THAT OUR PRODUCT WAS A DIRECT CAUSE OF SUCH CLAIM. FURTHER, IN NO EVENT, INCLUDING
IN THE CASE OF A CLAIM OF NEGLIGENCE, SHALL WHEELOCK BE LIABLE FOR INCIDENTAL OR
CONSEQUENTIAL DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF
INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE PRECEDING LIMITATION MAY NOT APPLY TO ALL
PURCHASERS.

1/02

P83862 M Sheet 23 of 23