System Sensor MDl Series Installation And Maintenance Instructions Manual

INSTALLATION AND MAINTENANCE INSTRUCTIONS

MDL Module

For use with the following series models:
H12/24, HC12/24, MA12/24D, PA400, S12XX, S24XX, SC24XX, P12XX,
P24XX, PC24XX, SP2C24XX, SP2R24XX, SP2W24XX, DS2475XXX
Add suffix “W” for white models.

Refer to System Sensor product installation manuals
for model specifications.

Specifications

Voltage Range: DC or Full Wave Rectified

11 to 30 Volts

(Note: Supply voltage range at 12 volts – 11 to 17 VDC; at 24 volts – 21 to 30 VDC)
Maximum Load on Loop: 3 A
Current:

Voltage

12 V
24 V

Operating Temperature: 0˚ C to 49˚ C (32˚ F to 120˚ F)
Listings: UL S4011, S5512

Average Peak In-rush

DC FWR DC FWR DC FWR

10mA 12mA 30mA 31mA 87mA 122mA

A Division of Pittway

3825 Ohio Avenue, St. Charles, Illinois 60174

1-800-SENSOR2, FAX: [phone]

198mA 262mA35mA 37mA11mA 15mA

General Description

The MDL Module is designed to work with the SpectrAlert
series of horns, strobes, and horn/strobes to provide a
means of synchronizing the Temporal-coded horns, syn­chronizing the one-second flash timing of the strobe, and
silencing the horns of the horn/strobe combination over a
two-wire circuit while leaving the strobes active.

NOTICE: This manual shall be left with the owner/user of
this equipment.

Module Configuration

Each MDL module has the capability of connecting two
Style Y (Class B) circuits or one Style Z (Class A) circuit.

The zone output(s) from the panel are connected to the
zone inputs of the MDL module and the zone output(s)
from the MDL module are connected to the notification
loop(s). Supervision is accomplished in the module by a di­rect connection between the zone input and the zone out­put of each of the two zone circuits connected to the
normal end-of-line device. The FACP “sees” the EOL device
through the MDL module. When either or both outputs
from the module are wired to the SpectrAlert products, the
horns and strobes in both zones will be synchronized.

The MDL module can be configured so that more than two
zones can be synchronized by the interconnection of the
slave input and output (see Figures 1 and 2).

Zone 1 Input: This input powers the MDL module. This input

must have voltage present from the FACP be­fore anything will work. This also supplies volt­age to Zone 1 output.

Zone 2 Input: This input only supplies voltage to Zone 2 out-

put. Note: If Zone 1 input is not powered, the
notification devices attached to the Zone 2 out­put will not be powered.

Horn Control: This input enables the horns on the SpectrAlert

notification appliances. Voltage present means
horns are enabled. No voltage present means
horns are disabled.

Slave In: Connects to Master MDL Module slave out.

Slave Out: Connects to Slave MDL slave in.

D900-14-00 1 I56-0983-008

Synchronize SpectrAlert Horns and Strobes

• Each module can power two 3-amp circuits wired in
class B or one 3-amp circuit powered as Class A.

• Each module will synchronize 2 zones.

• Additional modules can be added and may be synchro-

nized to all other modules by interconnecting the
“slave” input and output terminals between modules.

CAUTION

Horn control wiring must be contained within common en­closure of module.

CAUTION

Slave Out – Slave In wiring must be contained within either
the common enclosure of modules or enclosures within 20
feet of each other with wiring inside conduit.

CAUTION

If Zone 1 input is not powered or fails during alarm, the
notification devices attached to the Zone 2 output will not
be powered.

Figure 1:

NOTE: If zone 1 output of module is connected to strobes

or horn/strobes, zone 1 input supply power must
be continuous for proper operation.

MASTER MODULE

(+)

HORN

(–)

CONTROL

FACP

NAC1

NAC2

(+)

NAC3 OUT

NAC4 RETURN

(–)
(+)

(–)

STYLE Z

(CLASS A)

NOTE: Class A configuration requires special panel. Consult with panel manufacturer.

}

ZONE 1

(+)
(–)

IN

}

(+)

ZONE 2

(–)

IN

}

(+)

SLAVE

(–)

IN

}

Temp. Jumper Off

SLAVE MODULE

(+)

HORN

(–)

CONTROL

}

ZONE 1

(+)
(–)

IN

}

(+)

ZONE 2

(–)

IN

}

(+)

SLAVE

(–)

IN

}

Temp. Jumper Off

ZONE 1

ZONE 2

SYNC

ERROR

SLAVE

ZONE 1

ZONE 2

SYNC

ERROR

SLAVE

(+)
(–)

OUT

}

(+)
(–)

OUT

}

(+)
(–)

}

(+)
(–)

OUT

}

(+)
(–)

OUT

}

(+)
(–)

OUT

}

(+)
(–)

}

(+)
(–)

OUT

}

(+)

TO NEXT

DEVICE OR

EOL

(–)

2 STYLE Y (CLASS B)

(+)

TO NEXT

DEVICE OR

EOL

(–)

All SpectrAlert horns,
horn/strobes, and strobe
only devices will
operate in sync.

(+)

TO NEXT

DEVICE OR

EOL

(–)

1 STYLE Z (CLASS A)

(+)

TO NEXT

DEVICE OR

EOL

(–)

Controlling Sounder On/Off Over 2-Wires Using
Module Horn Control

• Connect the current source to the horn control input. If a
zone output is used for the source, you must use an EOL

Figure 2:

NOTE: If zone 1 output of module is connected to strobes

or horn/strobes, zone 1 input supply power must
be continuous for proper operation.

on the horn control input terminal.

• When multiple modules are used, the horn control cir­cuits can be wired in parallel. If wired in parallel and a
zone output is used from panel, use an EOL on the last
module for supervision.

CAUTION

Horn control wiring must be contained within common en­closure of module.

CAUTION

Slave Out – Slave In wiring must be contained within either
the common enclosure of modules or enclosures within 20

HORNS SILENCED OVER TWO WIRE CIRCUIT

MASTER MODULE HORN CONTROL CONNECTS
TO INTERRUPTABLE POWER SOURCE

MASTER MODULE

FACP #1

(+)

NAC1

(–)
(+)

NAC2

(–)
(+)

NAC3

(–)

EOL

(+)

HORN

(–)

CONTROL

}

ZONE 1

(+)
(–)

IN

}

(+)

ZONE 2

(–)

IN

}

(+)

SLAVE

(–)

IN

}

TEMP JUMPER OFF

ZONE 1

OUT

ZONE 2

OUT

SYNC

ERROR

SLAVE

OUT

(+)

(–)

}

(+)

(–)

}

(+)
(–)

}

(+)
(–)

}

TO NEXT

SPECTRALERT

DEVICE OR

EOL

TO NEXT

SPECTRALERT

DEVICE OR

EOL

feet of each other with wiring inside conduit.

CAUTION

FACP #2

If Zone 1 input is not powered or fails during alarm, the
notification devices attached to the Zone 2 output will not
be powered.

Special Considerations

A latching Relay contact is provided in case the synchroniz-

NAC1

NAC2

(+)
(–)

(+)
(–)

ing signal to the notification devices is interrupted. The
output can be wired so that a trouble signal will be annun­ciated at the panel. If the synchronization pulse fails in the
MDL module, the strobes will shut off.

D900-14-00 2 I56-0983-008

SLAVE MODULE

(+)

HORN

(–)

CONTROL

}

ZONE 1

(+)
(–)

IN

}

(+)

ZONE 2

(–)

IN

}

(+)

SLAVE

(–)

IN

}

TEMP JUMPER OFF

ZONE 1

OUT

ZONE 2

OUT

SYNC

ERROR

SLAVE

OUT

(+)
(–)

}

(+)
(–)

}

(+)
(–)

}

(+)
(–)

}

All SpectrAlert horns,
horn/strobes, and strobes
will operate in sync.

TO NEXT

SPECTRALERT

DEVICE OR

EOL

TO NEXT

SPECTRALERT

DEVICE OR

EOL