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Redback A 1741C Operating Manual

Message player
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Redback® A 1741C Message Player
Operating Manual
A 1741C
Message Player
The A 1741C 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 1741C requires a minimum of 12VDC at 300mA to work correctly with a maximum work-
ing voltage of 30VDC. Do not exceed 30VDC as it will cause permanent damage to the unit. A good working voltage is
between 12VDC and 24VDC. The power is connected via the 2.1mm (tip positive) DC socket on the rear of the unit (see
fig 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 1741C is powered by 12V, the switched output voltage will be 12V.
2.0 PLAY MODES
Alternate: When the A 1741C 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 con-
tact 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 1741C will continue to play the MP3 till it finishes 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 1.0 09/02/2022
www.redbackaudio.com.au
Redback® Proudly Made In Australia
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Summary of Contents for Redback A 1741C

  • Page 1 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 1741C will continue to play the MP3 till it finishes and will stop playing and wait for another trigger activation.

  • Page 2: Front Panel Connections

    Redback® A 1741C Message Player 3.0 FRONT PANEL CONNECTIONS A 1741C Timer Message Player Message Active Switches Disabled Cancel Fault Alert Evac Micro SD Card Standby 16GB Maximum Hold down the Alert or Evac button for 3 seconds to activate...

  • Page 3: Rear Panel Connections

    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 1741C is powered by 12V DC, the switched output voltage will be 12V DC.

  • Page 4: Dip Switch Settings

    Momentary: In Momentary mode (DIP switch1 OFF) a momentary closing contact or pulse on the trigger pins will activate the MP3. The A 1741C will continue to play the MP3 till it finishes and will stop playing and wait for another trigger activation.
  • Page 5 6.0 PUTTING MP3’S ON TO THE PLAYER You will first need to remove power from the A 1741C 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.
  • Page 6 Redback® A 1741C Message Player Step 3: Open folder named “trig1” and you should get a window that looks like figure 7. Delete this le and replace it with a new MP3 Fig 7 Step 4: You should see an MP3 file XXXXXX.MP3 if you have never changed the trigger1 MP3 file then it will be named Trigger1.MP3.
  • Page 7 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 1741C is OFF and insert the Micro SD card into the slot in the front; it will click when fully inserted.

  • Page 8: Troubleshooting

    1) Download the Zip file from the website (make sure it is an update for the A 1741C, not earlier models). 2) Remove the Micro SD card from the A 1741C and insert it into your PC. (Follow the steps on page 5 to open the Micro SD card).

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