3
INSTALLATION
Mounting the Receiver
Install the MLR-MX in a closed 19" rack or cabinet with a
locking rear access door. Cover all unused spaces with blank
metal plates. The LCD screens on the receiver are designed to
be viewed below eye level. If the unit must be mounted where
the screens are above eye level, angle the unit downwards to
improve visibility. The following items can be supplied for a
complete installation:
Stand-up Unit (61.25" tall up to 30 telephone lines)
Part # SG-MLR2-CL
Parts:
• Rack
• Door with lock and ventilation
• Blank plates 21" (2)
• Blank plate 5.25" (3)
• Screws
• Washers
• Clipnuts
• FROST 16V 175VA transformer
• AC Utility Box
• AC Cable Clamps (2)
• 8' Battery Cables
• 18 gauge 3-conductor AC Cable
NOTE: If 30 telephone lines are not used, cover each unused
location with a blank plate
Desk-mount Unit (28" tall up to 30 telephone lines)
Part # SG-MLR2-CM
Parts:
• Rack
• Louvered door back plate
• Blank Plate 1.75"
• Back Plate 7"
• Blank Plates 5.25 (4)
• Screws
• Washers
• Clipnuts
• FROST 16V 175VA Transformer
• AC Utility Box
• AC Cable Clamp for 3/8" cable
• 8' Battery Cable
• 18 gauge 3-conductor AC Cable
NOTES: If 15 modules are not used, cover each unused
location with a blank plate.
Use only UL Listed components with programmable output
on the MLR-MX.
Ex: UL Listed Buzzer part # PKB5-3A0
UL Listed Relay part # HAS-112-12
Grounding
For maximum resistance to static and electrical noise, the 19"
rack frame should be connected to earth ground through the
AC utility box.
Power Supply
Ensure that all electrical connections are made correctly. After
verifying all connections, connect the RED and BLACK leads to
a 12VDC sealed rechargeable battery. Be sure to observe polarity
when connecting the battery. When the battery is connected,
test the system under battery power only.
If a separate DC input is used to power the LCD backlighting
during AC power failures, connect it to the BLGT terminal. It
must be a listed Fire-Protective Signalling System power supply
rated 12VDC. Connect the positive lead from the DC supply to
the BLGT terminal; connect the negative lead from the DC
supply to the GND terminal.
CAUTION: Connecting a positive (+) terminal to a nega-
tive (-) terminal may cause a fire and possibly serious personal
har m.
For 4-hour standby, a 12-volt 35Ah rechargeable battery should
be used in conjunction with an engine driven power Generator.
Battery Charging Current
The maximum battery charging current is factory set at 1A.
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