System Sensor MDL, MDLW User Manual
INSTALLATION AND MAINTENANCE INSTRUCTIONS
CAUTION
I56-0983-015R
MDL Module
For use with the following series models:
P2RX, P2WX, P4RX, P4WX, SRX, SWX, SCRX, SCWX, HRX, HWX, CHX, CHRX, CHWX, CHSRX, CHSWX,
PC2RX, PC2WX, PC4RX, PC4WX, H12/24X, HC12/24X, PA400X, S1224MCX, SC24XX, P1224MCX, PC24XX,
SP2C24XX, SP2R1224MCX, SP2W1224MCX, CH24MCX, MHR(A), MHW(A), MHRZA, MHWZA
Refer to System Sensor product installation manuals for model specifications.
U.S. Patent Nos. 5,850,178 and 5,598,139
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
www.systemsensor.com
Specifications
Input Voltage Range: DC or Full Wave Rectified
9 to 33 Volts
When MDL module is used, supply voltage range at 12 volts: 9 to 17.5 VDC; at 24
volts: 17 to 33 VDC
Maximum Load on Loop: 3 A
Current:
Voltage
Average Peak In-rush
DC FWR DC FWR DC FWR
12 V 10mA 12mA 30mA 31mA 87mA 122mA
24 V 12mA 15mA 35mA 37mA 198mA 262mA
Operating Temperature: 0°C to 49°C (32°F to 120°F)
Listings: UL S4011, S5512
Note for Strobes – Do not exceed: 1) 9-17.5 or 17-33 voltage range limits when the MDL module is used; 2) Maximum
number of strobe lights and/or maximum line impedance specified in the strobe product installation manual; and 3) Maxuimum line impedence as required by the fire alarm control manufacturer.
General Description
The MDL Module is designed to work with the SpectrAlert
series of notification appliances to provide a means of
synchronizing the temporal-coded horns and chimes, synchronizing the one-second flash timing of the strobe, and
silencing the horns and chimes of the horn/strobe and
chime/strobes 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
input(s) 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 or chimes 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
output. 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 I56-0983-015R
TEMP. JUMPER OFF
NAC2
NAC1
FACP
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
HORN
CONTROL
ZONE 1
OUT
ZONE 1
IN
ZONE 2
IN
SLAVE
IN
ZONE 2
OUT
SYNC
ERROR
SLAVE
OUT
SEPARATE
MONITORING
INPUT
EOL
TO NEXT
SPECTRALERT
DEVICE OR
EOL
NAC3
NAC2
MASTER MODULE
SLAVE MODULE
NAC1
TO NEXT
SPECTRALERT
DEVICE OR
EOL
All SpectrAlert horns,
horn/strobes, and strobes
will operate in sync.
NAC2
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
HORNS SILENCED OVER TWO WIRE CIRCUIT
MASTER MODULE HORN CONTROL CONNECTS
TO INTERRUPTABLE POWER SOURCE
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
HORN
CONTROL
ZONE 1
OUT
ZONE 1
IN
ZONE 2
IN
SLAVE
IN
ZONE 2
OUT
SYNC
ERROR
SLAVE
OUT
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
(+)
(–)
HORN
CONTROL
TEMP JUMPER OFF
ZONE 1
OUT
ZONE 1
IN
ZONE 2
IN
SLAVE
IN
ZONE 2
OUT
SYNC
ERROR
SLAVE
OUT
TEMP JUMPER OFF
FACP #1
FACP #2
TO NEXT
SPECTRALERT
DEVICE OR
EOL
TO NEXT
SPECTRALERT
DEVICE OR
EOL
NAC1
(+)
(–)
EOL
Synchronize SpectrAlert Horns, Chimes and Strobes
CAUTION
CAUTION
CAUTION
CAUTION
CAUTION
CAUTION
• 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 synchronized to all other modules by interconnecting the
“slave” input and output terminals between modules.
Horn control wiring must be contained within common enclosure of module.
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.
If Zone 1 input is not powered or fails during alarm, the
notification devices attached to the Zone 2 output will not
be powered.
Controlling Sounder On/Off Over 2-Wires Using Module Horn Control
• Connect the current source to the horn or chime control
input. If a zone output is used for the source, you must
use an EOL on the horn control input terminal.
• When multiple modules are used, the horn or chime
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.
Horn/chime control wiring must be contained within common enclosure of module.
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.
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 synchronizing 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 I56-0983-015R
Figure 1: Single MDL Using Sync Error (for panels
with the capability to check for sync error)
NOTE: If zone 1 output of module is connected to strobes,
chime/strobes or horn/strobes, zone 1 input supply power
must be continuous for proper operation.
A0262-00
Figure 2:
NOTE: If zone 1 output of module is connected to strobes,
chime/strobes or horn/strobes, zone 1 input supply power
must be continuous for proper operation.
A0182-00
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