Redback A 2078B Operating Manual Download Page 7

Redback® A 4574

 Alert/Evac/Chime Tone Generator

www.redbackaudio.com.au

Redback® Proudly Made In Australia

7

Redback® A 4574

 Alert/Evac/Chime Tone Generator

11.0 Installing MP3 Files

You will first need to remove power from the A 4574 then remove the Micro SD card from the front of the unit. 
To remove the Micro SD card, push the card in and it will eject itself. 
In order to access the program, the Micro SD card will need to be connected to a PC. You will need a PC or laptop equipped 
with a Micro SD card reader to do this. If a Micro SD slot is not available then the Altronics D 0371A USB Memory Card 
Reader or similar would be suitable (not supplied). 

Step by step guide to installing an MP3 onto the MIcro SD card with a Windows installed PC 

Make sure the PC is on and card reader connected and correctly installed. Then insert the Micro SD card into the reader. 
Go to “My Computer” or “This PC” and open the Micro SD card which is usually marked “Removable disk”or “USB 
Drive”. 
In this case it is named “USB Drive (O:) as shown in figure 5.

 

Fig 5

Open the USB Drive and you should get a window that looks like figure 6. 

Fig 6

Summary of Contents for A 2078B

Page 1: ...instructions carefully from front to back prior to installation They include important setup instructions Failure to follow these instructions may prevent the unit from working as designed Distributed...

Page 2: ...ion Switch This switch is used to cancel the Alert Evac or Bell tones Press for 2 seconds to activate 5 Micro SD Card This is used to store the MP3 audio files for the Alert Evac Bell and Message play...

Page 3: ...Alert tone is activated The terminals provided can be used for Normal or Failsafe modes see section 8 0 for more details Bell 24V Out This is a 24V DC output which is activated when the Bell tone is...

Page 4: ...s etc These contacts can be set to either continuous or momentary operation via dip switch 1 refer to secton 7 0 In continuous mode the alert tone will continue while the alert contact is triggered In...

Page 5: ...same manner as the switched 24V out contacts i e connection between the N O contact and the GND contact will operate in NORMAL mode and connection between the N C contact and the GND will operate in...

Page 6: ...in MP3 format they cannot be Wav files or AAC files NOTE only one MP3 file can be in each folder There is also a folder labelled LIBRARY which contains a host of sample MP3 files The Voice folder cont...

Page 7: ...ed a PC or laptop equipped with a Micro SD card reader to do this If a Micro SD slot is not available then the Altronics D 0371A USB Memory Card Reader or similar would be suitable not supplied Step b...

Page 8: ...ted and replaced by the MP3 file you want to play when you activate the Alert mode The MP3 file name is not important But it is important that there is only one MP3 file in the Alert folder Check the...

Page 9: ...d to the Alert 24V and Evac 24V outputs of the A 4574 The cancel LED is not connected A mimimum of seven wires can be used if the ground connections of the Alert and Evac 24V outputs are linked and if...

Page 10: ...he Alert Evac and Bell 24V outputs and the grounds of the Alert Evac Chime and cancel switches are linked together see Fig 10 Fig 10 13 0 Troubleshooting E v a c A l e r t C h i m e C a n c e l A 4574...

Page 11: ...s Make sure the Alert Evac and Bell folders on the Micro SD card have MP3 files in them MP3 Audio files not playing Make sure they are in MP3 format Make sure Micro SD card inserted properly Check MP3...

Page 12: ...ice OUTPUT LEVEL 0dBm DISTORTION 0 01 FREQ RESPONSE 140Hz 20kHz SIGNAL TO NOISE RATIO Alert Evac Chime 70dB typically OUTPUT CONNECTORS Audio Output RCA Stereo Socket Switched 24V DC Out Screw Termina...

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