Redback A 1741 User manual

Operating Manual
A 1741 Message Player
The A 1741 is an MP3 based message player and tone generator designed for public address, security, customer direction
or emergency evacuation announcements.
1.0 Installation
Power requirements: The A 1741 needs a minimum of 12VDC at 300mA to work correctly. Maximum working voltage is
30VDC, do not exceed 30VDC as it will cause permanent damage to the unit. A good working voltage is between 12 and
24VDC. The power is connected via the 2.1mm (tip positive) DC socket on the rear of the unit (see g 1).
Output: Output is via the stereo RCA connectors on the rear. Output level is nominal 500mV but is related to the recorded
level of the MP3.
Input triggers: The input triggers are activated by closing contacts on the rear of the unit whether by a normally open
switch or a timer or controller. (Note: These triggers have a common ground).
Trigger Switches: The messages can also be activated by pressing the switches on the front of the unit. Note: The Alert
and Evac buttons must be held down for 3 seconds before they activate. This reduces the chance of accidental triggering.
Switched output: The switched output terminal is triggered when any zone is activated. The voltage is the same as the
power supplied to the unit. ie if the A 1741 is powered by 12V, the switched output voltage will be 12V.
2.0 Play modes
Alternate: When the A 1741 is in Alternate mode (DIP1 switch1 OFF) (see Fig 3) the closing contact must be held for the
duration of the MP3 play time, if it is released before the MP3 ends the MP3 will stop playing immediately. If the contact is
held closed continually the MP3 will continue to loop over and over until the contact is released.
Momentary: In Momentary mode (DIP1 switch1 ON) (see Fig 3) a momentary closing contact or pulse on the trigger pins
will activate the MP3. The A 1741 will continue to play the MP3 till it nishes and will stop playing and wait for another
trigger activation.
To stop an MP3 playing when in Momentary mode the Cancel trigger or Cancel switch is used. A momentary closing
contact on the Cancel trigger or closure of the Cancel switch will stop the MP3 playing (it is recommended that the Cancel
contact or switch be held up to 2 seconds to ensure the MP3 stops playing)
User manual revision number 1.3 26/05/2015

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Fig 1
3.0 FRONT PANEL CONNECTIONS
Timer
Message Player
A 1741
Power
1 2 3 4 5 6 7 8 Alert Evac
Message Active
SD CARD
Cancel Fault
On
16GB Maximum Hold down the Alert or Evac button for 3 seconds to activate
Switches
Disabled
71 2 3 4 5 6
1 Switches Disabled Indicator
This LED illuminates when the front switches are set to be disabled via the DIP switches on the rear of the
unit. (See Fig 2 for DIP Switch location).
2 SD card slot
The SD card which has the messages (in MP3 format) to be played is inserted here. The SD card can be a
maximum of 16GB.
3 Message Active Switches and Indicators
These switches are used to trigger the messages 1-8. The LED’s inside the switches indicate when the
associated message is playing. The messages can also be activated by using the triggers on the rear of the
unit. (See Fig 2 for details.) NOTE : If DIP switch 3 on the rear of the unit is set to “OFF” the front switches
will not operate and the “Switches Disabled” LED will illuminate.
4 Alert and Evac Switches and Indicators
These switches are used to trigger the Alert and Evacuation tones (which conform to AS1670.4). The LED’s
inside the switches indicate when the associated message is playing. The tones can also be activated by using
the Alert and Evac triggers on the rear of the unit. (See Fig 2 for details.) NOTE : If DIP switch 3 on the rear
of the unit is set to “OFF” the front Alert and Evac switches will not operate and the “Switches Disabled”
LED will illuminate. The Alert and Evac tones can also be disabled from the rear triggers by setting DIP switch
2 to the “OFF” position. (See Fig 2 for details.)
5 Cancel Switch
Use this switch to cancel any MP3 which is playing. (This may need to be held down for 2 seconds to cancel).
The Cancel option can also be activated by using the Cancel trigger on the rear of the unit. (See Fig 2 for
details.) NOTE : If DIP switch 3 on the rear of the unit is set to “OFF” the front Cancel switch will not operate
and the “Switches Disabled” LED will illuminate.
6 Status Led
This LED indicates whether the unit is ON or has a Fault condition. If the LED is “steady blue” the unit is
receiving power. If the LED is “ashing red” then a fault has occured with the unit.
7 Power Switch
Used to turn the unit On or OFF.

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4.0 REAR PANEL CONNECTIONS
Fig 2
1 DC Input
Power is supplied to the unit via a 2.1mm (tip to positive) DC socket. The input voltage must be between
12-30V DC.
2 RCA Stereo Line Output
Connect these outputs to the output amplier. Output level is nominal 500mV but is related to the recorded
level of the MP3.
3 Pluggable 12-30VDC switched output
Connects via Euroblock screw terminals. Please observe correct polarity when connecting.
The switched output terminal is triggered when any message or tone is activated. The output voltage is the
same as the power supplied to the unit. ie if the A 1741 is powered by 12V DC, the switched output voltage
will be 12V DC.
4 Cancel Trigger
The cancel trigger is activated by closing contacts on the rear of the unit whether by a normally open switch
or a timer or controller. The trigger can be set to Momentary or Alternate triggering. See DIP SW settings.
5 Alert and Evac Triggers
The Alert and Evac triggers are activated by closing contacts on the rear of the unit whether by a normally
open switch or a timer or controller. The triggers can be set to Momentary or Alternate triggering. See DIP SW
settings. (Note: These triggers have a common ground).
6 Message 1-8 Triggers
The message triggers are activated by closing contacts on the rear of the unit whether by a normally
open switch or a timer or controller. The triggers can be set to Momentary or Alternate triggering. See DIP SW
settings. (Note: These triggers have a common ground).
7 DIP Switches
These DIP switches are used to:
Set the triggers as either momentary or alternate action. (Refer to Fig 3)
Set the Alert and Evacuation tones to either “ON” or “OFF”. (Refer to Fig 3)
Disable or Enable the front switches for use. (Refer to Fig 3)
Set the delay between the Alert and Evacuation tones. (Refer to Fig 4)
8 Expansion Port
Not currently used.
4
1 2 65
3
7
4
L
R
Line Out
12-30V DC
Switched
Out
12-30V DC
IN
1
1 2 3 4 5 6 7 8
2
3567
8
Alert
Cancel
DIP Switch Settings
ON OFF
1Triggers momentary Triggers alternate
2Alert/Evac ON
Not Used
SW
TRIGGER OPERATION & ALERT/EVAC SETTINGS
DIP Switches
Evac
Triggers
Close
Contacts
to
Trigger
50101010101010101
60011001100110011
70000111100001111
80000000011111111
Delay
(Sec.)
OFF
30 60 90
120 150 180 210 240 270 300 330 360
390 420 450
AUTO ALERT TO EVAC SWITCHOVER TIMER SETTINGS. 0 = OFF. 1 = ON.SW
3Front switches active Front switches de-activated
4
Alert/Evac OFF
+
–
+-
1 2 3 4 5 6 7 8
www.altronics.com.au
Manufactured in Australia By Altronic Distributors Pty. Ltd.
Expansion
Port
8

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5.0 DIP Switch Settings
(DIP SW 1) Momentary or Alternate triggering
50101010101010101
60011001100110011
70000111100001111
80000000011111111
Delay
(Sec.)
OFF
30 60 90
120 150
180 210 240 270 300 330 360 390 420 450
AUTO ALERT TO EVAC SWITCHOVER TIMER SETTINGS. 0 = OFF. 1 = ON.SW
ON OFF
1Triggers momentary Triggers alternate
2Alert/Evac ON
Not Used
SW
TRIGGER OPERATION & ALERT/EVAC SETTINGS
3Front switches active Front switches de-activated
4
Alert/Evac OFF
Fig 3
Fig 4
Alternate: When the A 1741 is in Alternate mode (DIP switch1
OFF) the closing contact must be held for the duration of the
MP3 play time, if it is released before the MP3 ends the MP3 will
stop playing immediately. If the contact is held closed continual-
ly the MP3 will continue to loop over and over until the contact
is released.
Momentary: In Momentary mode (DIP switch1 ON) a
momentary closing contact or pulse on the trigger pins will
activate the MP3. The A 1741 will continue to play the MP3
till it nishes and will stop playing and wait for another trigger activation.
To stop an MP3 playing when in Momentary mode the Cancel trigger or Cancel switch is used. A momentary closing
contact on the Cancel trigger or closure of the Cancel switch will stop the MP3 playing (it is recommended that the
Cancel contact or switch be held up to 2 seconds to ensure the MP3 stops playing).
(DIP SW 2) Alert/Evacuation Tones ON or OFF
When switch 2 is set to “OFF” the Alert and Evac tones cannot be triggered either by the front switches or the rear
terminal contacts. If switch 2 is set to “ON” the Alert and Evac tones can always be triggered via the rear terminal con-
tacts. However the front switch triggering is dictated by DIP Switch 3.
(DIP SW 3) Front Switch Activation
When switch 3 is set to “OFF” the front switches become de-activated from use. When these switches are de-activated
the “Switches Disabled” LED on the front of the unit will illuminate. This function disables all the switches including the
cancel, alert and evac.
(DIP SW 4)
Not currently used
(DIP SW 5-8) Alert/Evacuation Tones change over option
The Alert and evacuation tones conform to Australian Standards AS1670.4 and are used to notify building occupants of
an emergency situation.
The Alert tone comes with a change over option which forces the A 1741 to switch from the Alert to the Evacuation
tone after a prescribed time. DIP switches 5-8 set these change over times from 30 seconds to 450 seconds in 30 second
intervals. If all DIP switches are set to “OFF” the changeover is disabled.

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6.0 Putting MP3’s on to the Player
You will rst need to remove power from the A 1741 then remove the SD card from the front of the unit.
To remove the SD card push the card in and it will eject itself.
The SD card will then need to be connected to a PC. You will need a PC equipped with a SD card reader to do this (not
supplied).
Step by step guide to put a MP3 into Trigger1 with a Windows installed PC
Step 1: Make sure the PC is on and card reader connected and correctly installed. Then insert the SD card into the reader.
Step 2: Go to “My Computer” (gure 2) and open the SD card which is usually marked “Removable disk”.
In this case it is named “Removable disk (G:)”
Open
Removable Disk
Trigger 1 Folder
You Should get a window that looks like gure 6.
Fig 5
Fig 6

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Delete this le
and replace it
with a new MP3
Step 3: Open folder named “trig1” and you should get a window that looks like gure 7.
Step 4: You should see an MP3 le XXXXXX.MP3 if you have never changed the trigger1 MP3 le then it will be named
Trigger1.MP3.
This MP3 le needs to be deleted and replaced by the MP3 le you want to play when you activate trigger1. The MP3
le name is not important only that there is one MP3 le in the trig1 folder. Make sure you delete the old MP3!
The folder should look something like gure 8.
NOTE the new MP3 le cannot be “Read only” to check this right click on the MP3 le and scroll down
and select Properties, you will get a window that looks like gure 9. Make sure the “Read Only” box has
no tick in it.
Fig 7
Fig 8

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Fig 9
The new MP3 is now installed on the card and the
card can be removed from the PC following windows
safe card removal procedures. Make sure the A 1741
is OFF and insert the SD card into the slot in the front;
it will click when fully inserted.
The A 1741 is ready to go on Trigger1.
Repeat these steps for Trigger2 to Trigger8 if you
need to.
Please note: that the ALERT and EVAC folders
and the MP3 les inside these folders should not
be deleted or renamed in anyway this will cause
the A 1741 to stop responding.
Emergency tones (Alert and Evacuation)
The Alert and evacuation tones conform to
Australian Standards AS1670.4 and are used to notify
building occupants of an emergency situation.
Alert: The Alert tone is activated by a closing contact
on the ALERT trigger or by pressing the Alert button
on the front of the unit and can be used in
Alternate or Momentary setup as mentioned in
section 2.0 and the Dip Switch settings. The Alert
tone comes with a change over option which forces
the A 1741 to switch from Alert to the Evacuation
tone after a prescribed time. Use DIP switches 5-8 to
adjust this time or switch off completely (see Fig 4).
Evacuation: The Evacuation tone is activated by a
closing contact on the Evac trigger or by pressing the
Evac button on the front of the unit and and can
be used in Alternate or Momentary setup as
mentioned in section 2.0 and the Dip Switch settings.
Evacuation message: A message (repeated twice)
can be inserted every three evacuation cycles as per
the Australian Standards. Voice message could be
something like “please evacuate the building by the
closest exit”. To install a Evacuation message on the A 1740 follow the Step by step guide to put a MP3
into Trigger1 with a Windows installed PC but replace Trigger1 with Voice i.e. put the message into the
Voice folder on the SD card and delete any other MP3 le located in the voice folder.
Priority: The Emergency tones have priority over other triggers (1 to 8) and if activated will stop any other
MP3 and activate the selected emergency tone. Evacuation also has priority over Alert.

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8.0 Specications
Power supply: .................. 12VDC to 30VDC 300mA (idle/maximum current draw 150mA) tip positive
Output: .................................................................................................. Stereo RCA 500mV nominal
MP3 sample rate: ...................................................................................................................... 44kHz
SD card size: .............................................................................................................. 256MB to 16GB
Trigger activation: ......................................................................................................Closing contact
Switched output: ............................................................... 12-30VDC out (supply voltage dependant)
MP3 info:
Length/size: ................................ Limited by card size (800mins @ 128kbps, 44kHz on supplied 8GB)
Bit rate: .................................................................. All standard MP3 rates (128kbps recommended)
Sample rate: ............................................................... All standard MP3 rates (44kHz recommended)
Channels: .................................................................................................................. Stereo or mono
* Specications subject to change without notice.
7.0 Troubleshooting
NO Power (Power LED does not illuminate):
Check power supply DC jack is 2.1mm and not 2.5mm size.
Power supply voltage is 12-30VDC.
Power supply is a DC output, not AC.
Message active 10 LED ashs all the time:
This is an indicator that the SD card is not inserted correctly or is not formatted. Make sure all folders
on the SD card are as per gure 6.
Emergency tones do not work:
Switch DIP switch 2 ON to activate emergency tones.