Section 3: Installation; Mounting The Receiver; Printer Connections; Computer Connections - DSC SG SECURITY MLR2-DV Instruction Manual

Section 3: Installation

3.1 Mounting the Receiver

• Install the MLR2-DV 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 14 lines)
Part # MLR2A-CL
Part
• Rack
• Door with lock and
ventilation
• Blank plates 21" (2)
• Blank plate 5.25" (3)
• Screws
• Washers
• Clipnuts
• FROST 16V 75VA
transformer
(RTFR7516)
• AC Utility Box
• AC Cable Clamps (2)
• 8' Battery Cables
• 18 gauge 3-conductor
AC Cable
NOTE: If 14 lines are not used, cover each unused location
with a blank plate
Desk-mount Unit (28"
tall up to 14 lines)
Part # MLR2A-CM
Part
• Rack
• Louvred door back
plate
• Blank Plate 1.75"
• Back Plate 7"
• Blank Plates 5.25 (4)
• Screws
• Washers
• Clipnuts
• 16V 75VA Transformer
• AC Utility Box
• AC Cable Clamp for 3/8" cable N/A
• 8' Battery Cable
• 18 gauge 3-conductor AC Cable
NOTE: If 14 lines are not used, cover each unused location
with a blank plate
4

3.2 Printer Connections

The following printers can be used with MLR2-DV (ULC
Listed):
• Star DP8340 Sur-Gard part # DCDP8340 (The SG-1220P
power supply should be used)
• The SG-1220P (Sur-Gard part number XP1220) is a 12V
2A power supply housed in a metal case with a tamper
switch. It requires one 12V
(6 to 25 Ah rating) and one 16V
transformer (Frost FTC4016 or equivalent).
Connect the parallel printer to the MLR2-DV printer output
port using a parallel printer cable.
IMPORTANT: Do not use a printer cable which has only 1
common ground wire.

3.3 Computer Connections

• Connect the computer to the MLR2-DV RS-232 port using
a serial cable to COM1. IMPORTANT: Do not use a null
modem cable.
Receiver RS-232
25 pin connector

3.4 Grounding

• For maximum resistance to static and electrical noise,
the 19" rack frame should be connected to earth ground
through the AC utility box.

3.5 Power Supply

• Ensure that all electrical connections are made correctly.
After verifying all connections, connect the RED and
BLACK leads to a 12V
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 12V
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
negative (-) terminal may cause a fire and possibly
serious personal harm.
• For 24 hour standby, 12V 17.5Ah rechargeable battery
should be used for 6 line configuration, and 12V 38Ah
rechargeable battery should be used for 14 line
configuration.

3.6 Battery Charging Current

The maximum battery charging current is factory set at 1A.
firealarmresources.com
sealed rechargeable battery
DC
Computer RS-232
25 pin connector
1 1
2 2
3 3
7 7
sealed rechargeable battery.
DC
. Connect the positive lead from the
DC
40VA Class 2 wire-in
AC
Computer RS-232
9 pin connector
3
2
5