3825 Ohio Avenue • St. Charles, IL 60174

Phone: 800-SENSOR2 • Fax: 630-377-6495

©2007 System Sensor.

Product specifications subject to change without notice. Visit systemsensor.com for

current product information, including the latest version of this data sheet.

A05-1007-005 • 6/07 • #1676

Horns and Chimes Silenced Over Two-Wire Circuit

1. Any mix of Horn/Strobes, Chime/Strobes or Strobe only devices is acceptable

2. Horn and chime control connects to interruptible power source

Current Draw and Ordering Information

Red

White

Voltage

Average Current (mA)

Peak Current (mA)

In-rush Current (mA)

DC

FWR

DC

FWR

DC

FWR

MDL,

MDLA (Canadian)

MDLW,

MDLWA (Canadian)

12

10

12

30

31

87

122

24

11

15

35

37

198

262

Architectural/Engineering Specifications

Synchronization Circuit Module shall be a System Sensor Sync•Circuit Model _________ listed to UL464 and shall be approved for fire protective service. The

module shall synchronize SpectrAlert® strobes at 1 Hz and horns at temporal 3. Also, the module shall be capable of silencing the horns on horn/strobe models,

while operating the strobes, over a single pair of wires. The module shall be capable of mounting to a 411⁄16˝× 411⁄16˝× 21⁄8˝ back box and shall control two Style Y

(class B) or one Style Z (class A) circuit. The module shall be capable of multiple zone synchronization by connecting multiple modules together via a slave-in/

slave-out arrangement and re-synchronizing each other along the chain. Note: The module shall not operate on a coded power supply.

Physical Specifications

Dimensions

51⁄4˝ L × 51⁄4˝ W

Mounting

411⁄16˝ × 411⁄16˝ × 21⁄8˝ back box

Indoor Operating Temperature

32° to 120° F (0° to 49° C)

Electrical/Operating Specifications

Operating Voltage

12 or 24 VDC and FWR unfiltered

Operating Voltage Range (12 V)

9 to 17.5 VDC

Operating Voltage Range (24 V)

17 to 33 VDC

Maximum Load on Loop

3 Amps/zone

U.S. Patent Nos.

5,598,139

5,850,178

HORNS SILENCED OVER TWO WIRE CIRCUIT

MASTER MODULE HORN CONTROL CONNECTS

TO INTERRUPTABLE POWER SOURCE

SLAVE MODULE

NAC1

TO NEXT

SPECTRALERT

DEVICE OR

EOL

All SpectrAlert horns,

horn/strobes, and strobes

will operate in sync.

NAC2

(+)

(–)

(+)

(–)

}

}

(–)

(–)

(+)

(–)

(+)

(–)

(–)

(–)

(–)

(–)

HORN

CONTROL

ZONE 1

OUT

ZONE 1

IN

ZONE 2

IN

SLAVE

IN

ZONE 2

OUT

SYNC

ERROR

SLAVE

OUT

TEMP JUMPER OFF

FACP #2

TO NEXT

SPECTRALERT

DEVICE OR

EOL

TO NEXT

SPECTRALERT

DEVICE OR

EOL

NAC3

NAC2

MASTER MODULE

(+)

(–)

(+)

(–)

}

}

(–)

(+)

(–)

(–)

(+)

(–)

(–)

(–)

(–)

(–)

HORN

CONTROL

ZONE 1

OUT

ZONE 1

IN

ZONE 2

IN

SLAVE

IN

ZONE 2

OUT

SYNC

ERROR

SLAVE

OUT

TEMP JUMPER OFF

FACP #1

TO NEXT

SPECTRALERT

DEVICE OR

EOL

NAC1

(+)

(–)

EOL