Figure 5: horns and strobes powered in tandem, Figure 3: horn factory default setting, Tandem operation – System Sensor S1224MCK, P1224MCK and H12_24K User Manual

Page 3: Independent operation, Permissible candela settings

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System Operation – Non-Synchronized Devices:
Figure 4a. Any combination of models powered by a
2-wire circuit:

HORN

(+)

(–)

(+)

(–)

E

O

L

(+)

(–)

(+)

(–)

HORN/STROBE

STROBE ONLY

TWO WIRE SYSTEM

ANY MIX OF MODELS

WIRED FOR TANDEM

OPERATION

HORN

SYNCHRONIZATION MODULE

MDL

(+)

(–)

(+)

(–)

E

O

L

(+)

(–)

(+)

(–)

HORN/STROBE

STROBE ONLY

TWO WIRE SYSTEM

ANY MIX OF MODELS

WIRED FOR TANDEM

OPERATION

System Operation – Synchronized Devices:
Figure 4b. Any combination of models powered by a
2-wire circuit:

HORN

(+)

(–)

(+)

(–)

E

O

L

(+)

(–)

(+)

(–)

HORN/STROBE

STROBE ONLY

TWO WIRE SYSTEM

ANY MIX OF MODELS

WIRED FOR TANDEM

OPERATION

HORN

SYNCHRONIZATION MODULE

MDL

(+)

(–)

(+)

(–)

E

O

L

(+)

(–)

(+)

(–)

HORN/STROBE

STROBE ONLY

TWO WIRE SYSTEM

ANY MIX OF MODELS

WIRED FOR TANDEM

OPERATION

Figure 5: Horns and strobes powered in tandem:

NOTE: Supply power must be continuous for proper operation.

FROM:

FACP, MODULE

OR PREVIOUS

DEVICE

TO NEXT

DEVICE OR

EOL

+

Strobe +

Strobe – Horn –

Horn +

TANDEM OPERATION

HORN/STROBE COMBO

FACTORY
INSTALLED
JUMPERS

Figure 6: Any combination of models powered by a 4-
wire circuit to provide independent horn and strobe op-
eration (remove factory installed jumpers, see Figure 8):

(+)

(–)

(+)

(–)

(+)

(–)

FOUR WIRE SYSTEM

COMBO MODELS

WIRED FOR INDEPENDENT

OPERATION

(HORN CAN BE TURNED OFF

AT THE PANEL WHILE STROBES

CONTINUE TO OPERATE)

E

O

L

(+)

(–)

(+)

(–)

(+)

(–)

E

O

L

S

T

R

O

B

E

C

O

M

B

O

H

O

R

N

H

O

R

N

S

T

R

O

B

E

Figure 7: Horns and strobes powered indepen-
dently (horn operated on coded power supply):

NOTE: Strobes must be powered continuously for horn operation.

FROM:

FACP, MODULE (MDL)

OR PREVIOUS

DEVICE

Break wire as shown for

supervision of connection.

DO NOT allow stripped wire

leads to extend beyond switch

housing. DO NOT loop wires.

TO NEXT

DEVICE OR

EOL

INDEPENDENT OPERATION

HORN AND STROBE

TO NEXT

DEVICE OR

EOL

STROBE +

HORN +

STROBE +

STROBE –

STROBE –

HORN –

HORN –

HORN +

FACTORY INSTALLED

JUMPER WIRES REMOVED

NOTE: STROBES MUST

BE POWERED CONTINUOUSLY

FOR HORN OPERATION.

Candela Selections:
Figure 2: For strobe candela selection, adjust slide
switch located on the rear of the product while watch-
ing the viewing window on the side of the reflector.

NOTE: SpectrAlert selectable out-
put strobes, set at 15 and 15/75cd,
automatically work on both 12V
and 24V power supplies.

NOTE: The strobe is not listed
for 12V operating voltages when
set to 30, 75 or 110 candelas.
Use only those settings marked
as OK in this chart:

Horn selections using 3-position DIP switch on horn/
strobe (refer to Figure 3):

NOTE: When powered from a FWR supply, the horn will be mod-
ulated (turned on and off) by 120Hz causing it to sound different
than if powered by a DC supply.
High/Low Volume
ON=High Volume, OFF=Low Volume
NOTE: The low volume setting of some tones must NOT be used
for public mode applications when the device is powered from a 12-
volt panel. Refer to the Sound Output Guide on the previous page.

Temp/Non-Temp
ON=NON-Temporal, OFF=Temporal
3KHz/Electromechanical
ON=3KHz, OFF=Electromechanical

Figure 3: Horn Factory Default Setting:

The factory default setting is High, Temporal 3, and Electrome-
chanical tone.

Low

OFF

ON

Temporal

Electromech.

DIP Switch

Factory

Default

High

Non-Temporal

3000Hz

Base (rear)

WARNING

Check terminal polarity before wiring. For proper operation, make
sure the correct wire polarity is applied to the unit.

D900-37-00

3

I56-2257-005R

A0110-00

A0111-00

A0112-00

Viewing Window

A0133-00

Permissible Candela Settings:

Candela

Setting

Operating Voltage

12V

24V

15

OK

OK

15/75

OK

OK

30

OK

75

OK

110

OK

A0111-00

NOTE: Strobes must be
powered continuously
for horn operation.

A0113-00

A0114-00

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