Secutron MR-2312-AT User manual
INSTALLATION
MANUAL
Revision 1 101007
Document #: LT-658SEC
WARNING: This manual contains information on limitations
regarding product use and function and information on the
limitations as to liability of the manufacturer. The entire
manual should be read carefully.
MR-2312-AT
Fire Alarm Control Unit
MR-2312-AT Remote Annunciator Wiring and Instruction Manual
i
Table of Contents
Introduction ............................................................................................................................. 1
Technical Support................................................................................................................ 1
Installation Instructions.......................................................................................................... 2
Controls and Displays ............................................................................................................ 2
Wiring Instructions.................................................................................................................. 3
DIP Switch Settings................................................................................................................. 4
Jumper Selection ................................................................................................................. 4
Specifications and Features................................................................................................... 5
Enclosure............................................................................................................................. 5
Electrical Specifications ....................................................................................................... 5
Current Drain for Battery Calculations ................................................................................. 5
Warranty and Warning Information ....................................................................................... 6
Warning Please Read Carefully........................................................................................... 6
Limited Warranty.................................................................................................................. 8
Warranty Procedure............................................................................................................. 8
Disclaimer of Warranties...................................................................................................... 8
Out of Warranty Repairs ...................................................................................................... 9
MR-2312-AT Remote Annunciator Wiring and Instruction Manual
1
Introduction
Secutron’s MR-2312-AT Annunciator is a 16-circuit annunciator for use with Secutron’s MR-2300
Series Fire Alarm Control Panels. Annunciators mount into standard four-gang electrical boxes, and
may not be expanded. Control access is by a keyswitch. Each circuit indicator is a bi-colour LED that is
automatically configured to match the fire alarm control panel configuration.
Technical Support
For all technical support inquiries, please contact Secutron’s Technical Support Department between 8
A.M. and 5 P.M. (EDT) Monday through Friday, excluding holidays.
Note: For ULC S527 applications the MR-2312-AT is an ancillary display device.
Local Phone: 905-695-3545 Toll-Free Phone: 1-888SECUTRON
Local Fax: 905-660-4113 Toll-Free Fax: 1-888-660-4113
Installation Instructions
2
Installation Instructions
Controls and Displays
For precise definitions of control & display operation, refer to the manual of the fire alarm control panel that
the annunciator will be connected to.
Notes:
• The MR-2312-AT is supplied with NP-386 paper labels for zone identification.
• This annunciator displays initiating circuit status only (no individual circuit troubles).
Indicating and relay circuits are not remotely displayed. For more details, refer to the
manual of the fire alarm control panel that the annunciator will be connected to.
• The MR-2312-AT has a keyswitch to enable the four slide-switch controls. The key
should be appropriately secured.
Controls Displays
System Reset, Signal Silence Switches AC On, Common Trouble, Signal Silence LEDs
Buzzer Silence, Lamp Test Switches 16 circuit status bi-coloured (red/amber) LEDs
Standard Electrical
Box
Clear Lexan
Flush Mount
Secure
with
#6-32
Screws
Paper Labels
Wall
Std
Elec.
Box
Std
Elec.
Box
Wall
Surface Mount
MR-2312-AT Remote Annunciator Wiring and Instruction Manual
3
Wiring Instructions
The RS-485 Wiring to the MR-2312-
AT Module is recommended to be
twisted shielded pair as shown in
the diagram. The wire gauge may
be:
• 22 AWG up to 2000 ft.
• 20 AWG up to 4000 ft.
The RS-485 wiring from the fire
alarm control panel to the
annunciator(s) must be point-to-
point from the fire alarm panel to the
first annunciator, then to the next
annunciator, and so on. No star
wiring or T-tapping is allowed. Each
MR-2312-AT Annunciator Module
has a 120 ohm end-of-line resistor
on its RS-485 output terminals. This
is removed on all except the last
wired module.
The 24 VDC field wiring needs to be of an appropriate gauge for the number of annunciators and the
total wiring run length. Use the Current Drain for Battery Calculations on page 5 to calculate the
maximum current for all annunciators summed together.
Note: All circuits are power limited and must use type FPL, FPLR, or FPLP power limited
cable.
WARNING: Accidentally connecting any of the 24 VDC wires to the RS-485 wiring will
result in damage to the annunciator and/or to the fire alarm control panel to which it is
connected.
Total
Maximum
Current for all
Annunciators
Maximum Wiring Run to Last Annunciator Max Loop
Resistance
18AWG 16AWG 14AWG 12AWG 0hms
Amperes ft. mft. mft. mft. mOhms
0.12 1180 360 1850 567 3000 915 4250 1296 15
0.30 470 143 750 229 1200 366 1900 579 6
0.60 235 71 375 114 600 183 850 259 3
0.90 156 47 250 76 400 122 570 174 2
1.20 118 36 185 56 300 91 425 129 1.5
1.50 94 29 150 46 240 73 343 105 1.2
1.70 78 24 125 38 200 61 285 87 1.0
+
24 VDC
OUTPUT
-
S
S
-
+
-
+
-
+
RS-485
OUTPUT
RS-485
INPUT
24 VDC
INPUT 24 VDC POWER FROM FIRE ALARM CONTROL
PANEL OR PREVIOUS ANNUNCIATOR
24 VDC POWER TO
NEXT ANNUNCIATOR
RS-485 TO NEXT ANNUNCIATOR
(TWISTED SHIELDED PAIR)
RS-485 FROM FIRE ALARM OR PREVIOUS
ANNUNCIATOR (TWISTED SHIELDED PAIR)
DIP Switch Settings
4
DIP Switch Settings
Each annunciator needs to be assigned a unique, sequential address via DIP switches SW1-1, SW1-2, and
SW1-3. DIP switch SW1-4 is used to allow disabling of some front panel slide switches.
Set the annunciator address (see the manual for the fire alarm control panel being used), as follows in the
table below:
Annunciators on a common RS-485 connection must be numbered sequentially; i.e.: 1,2,3,4, and not
randomly such as 5,3,7. Note that not all annunciator “addresses” are valid for all fire alarm control panels.
Refer to the fire alarm control panel manual for further information.
Jumper Selection
Jumper JP1 connects pins 2 and 3 and thus provides an eight bit checksum.
JW4
Jumper Intact = Buzzer silence & Lamp Test local function only. System Reset & Signal Silence are
disabled.
Cut Jumper to have all remote functions operate.
SW1-1 = Address A0\
>Three digit address of the annunciator (address
range 1 to 7 inclusive)
SW1-2 = Address A1
SW1-3 = Address A2/
SW1-4 =
When SW1-4 is “off”, the System Reset and Signal Silence slide-switches are
always disabled, regardless of the operation of the keyswitch. The Buzzer
Silence and Lamp Test slide-switches will operate with the use of the
keyswitch.
When SW1-4 is “on”, all four slide -switches on the front panel will operate
with the use of the keyswitch.
Annunciator
Address
SW1 DIP Switch Settings
SW1-1 SW1-2 SW1-3
1ONOFFOFF
2 OFF ON OFF
3ONONOFF
4OFFOFFON
5ONOFFON
6 OFF ON ON
7ONONON
MR-2312-AT Remote Annunciator Wiring and Instruction Manual
5
Specifications and Features
Enclosure
• A standard 4-gang electrical box is used.
Electrical Specifications
• 24 VDC nominal voltage
• Slide-switch controls, LED indicators, and keyswitch to enable controls.
• Local buzzer, indicators (ac-on, common trouble, signal silence), and controls (system reset, lamp
test, buzzer silence, signal silence).
• Annunciation of up to 16 points.
• Not expandable.
• Standby 35 mA Max., All LED’s illuminated 140 mA max.
Current Drain for Battery Calculations
The lamp test feature draws the maximum normal current because it illuminates all lamps on one
chassis at a time. Thus the currents are:
Use the “normal standby current” for battery size calculations (see the fire alarm control panel manual
for battery calculations) and includes the current drain for the Trouble Buzzer, Trouble LED, and one
alarm LED. Use the “maximum current” to calculate the wire size (see the wiring instructions on
page 3).
Normal Standby Current = 35 mA Maximum Current = 140 mA
Warranty & Warning Information
6
Warranty & Warning Information
Warning Please Read Carefully
Note to End Users: This equipment is subject to terms and conditions of sale as follows:
Note to Installers
This warning contains vital information. As the only individual in contact with system users, it is your responsibility to
bring each item in this warning to the attention of the users of this system. Failure to properly inform system end-
users of the circumstances in which the system might fail may result in over-reliance upon the system. As a result, it
is imperative that you properly inform each customer for whom you install the system of the possible forms of
failure.
System Failures
This system has been carefully designed to be as effective as possible. There are circumstances, such as fire or
other types of emergencies where it may not provide protection. Alarm systems of any type may be compromised
deliberately or may fail to operate as expected for a variety of reasons. Some reasons for system failure include:
•Inadequate Installation
A Fire Alarm system must be installed in accordance with all the applicable codes and standards in order to provide
adequate protection. An inspection and approval of the initial installation, or, after any changes to the system, must
be conducted by the Local Authority Having Jurisdiction. Such inspections ensure installation has been carried out
properly.
•Power Failure
Control units, smoke detectors and many other connected devices require an adequate power supply for proper
operation. If the system or any device connected to the system operates from batteries, it is possible for the
batteries to fail. Even if the batteries have not failed, they must be fully charged, in good condition and installed
correctly. If a device operates only by AC power, any interruption, however brief, will render that device inoperative
while it does not have power. Power interruptions of any length are often accompanied by voltage fluctuations which
may damage electronic equipment such as a fire alarm system. After a power interruption has occurred,
immediately conduct a complete system test to ensure that the system operates as intended.
•Failure of Replaceable Batteries
Systems with wireless transmitters have been designed to provide several years of battery life under normal
conditions. The expected battery life is a function of the device environment, usage and type. Ambient conditions
such as high humidity, high or low temperatures, or large temperature fluctuations may reduce the expected battery
life. While each transmitting device has a low battery monitor which identifies when the batteries need to be
replaced, this monitor may fail to operate as expected. Regular testing and maintenance will keep the system in
good operating condition.
•Compromise of Radio Frequency (Wireless) Devices
Signals may not reach the receiver under all circumstances which could include metal objects placed on or near the
radio path or deliberate jamming or other inadvertent radio signal interference.
•System Users
A user may not be able to operate a panic or emergency switch possibly due to permanent or temporary physical
disability, inability to reach the device in time, or unfamiliarity with the correct operation. It is important that all
system users be trained in the correct operation of the alarm system and that they know how to respond when the
system indicates an alarm.
•Automatic Alarm Initiating Devices
Smoke detectors, heat detectors and other alarm initiating devices that are a part of this system may not properly
detect a fire condition or signal the control panel to alert occupants of a fire condition for a number of reasons, such
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