DM3018A User's Guide
Contents
1. POWER SUPPLY Pg RELAY J DM3028B EM3028B User s Manual Page 2 of 4 Trigger Modes The Trigger Mode defines how the playback is to be triggered via the Parallel Interface which has 8 inputs labeled T1 through T8 All inputs are internally connected to 5V through 10K resistors If left unconnected an input is at 5V logic 1 The Trigger Mode does not apply when the system is controlled via the Serial Interface Direct Trigger In this mode each input directly triggers a corresponding file T1 File 001 T2 File 002 18 File 008 A trigger is valid when the input is shorted to the ground for at least 50 ms The Direct Trigger is prioritized from T1 the highest to T8 the lowest However it does not mean a higher priority input can interrupt a lower one It only means that if multiple triggers are applied at the same time the highest priority wins Binary Trigger Use the Binary Trigger to trigger up to 128 different files ranging from 001 to 128 The Binary Trigger is often preferred when the system is controlled by an external controller because it requires less I O ports in most cases To trigger a particular file the first step is to signal the file number on T1 LSB T7 MSB The signal must be in the binary format with 5V being logic 1 and OV the ground being logic 0 For example to signal File 007 binary code 0000111 T1 T3 should be at 5V and T4 T7 should2. at 9600 baud eight data bits no parity and one stop bit 9600 8N1 Other protocols may be sup ported by special request For RS 232 applications the system a DCE device is connected to a DTE device such as a PC with a regular serial cable not a null modem cable For RS 485 applications up to 32 systems each assigned with a unique address can be daisy chained on the same bus with a 2 wire cable To enable the serial interface on the system the configuration file must contain a two digit address ranging from 01 to 32 This address assignment seems unnecessary for RS 232 applications because RS 232 is a one to one interface But it is necessary for us because we want to provide a uniform protocol for both RS 232 and RS 485 The benefit of a uniform protocol is that it allows us to control mul tiple systems from a DTE which has only a RS 232 port In this case a RS 232 to RS 485 hardware converter is needed to convert the DTE s RS 232 port into a RS 485 port The communication protocol uses software handshake on a per byte basis That is for every byte it receives the system sends an confirmation byte to the DTE The DTE must not send the next byte until it receives the confirmation one exception explained below A communication session always starts with a selection process The DTE should first sends out an ASCII A which as the only exception will not be confirmed by any system on the bus The DTE s
3. be at OV Note that as a special case the binary code for File 128 is 0000000 The second and the last step is to short T8 to the ground for at least 50 ms while maintaining the signal on T1 T7 Afterwards signals on T1 T7 don t matter any more Sequential Trigger Use the Sequential Trigger to sequentially trigger up to 99 different files per input as defined below T1 triggers File 001 099 T2 triggers File 201 299 T8 triggers File 801 899 Each trigger on the same input activates a different file in the se quence The sequence automatically restarts either when the end of the sequence is reached or when there is a break in the se quence For example if there are three files for T1 001 002 and 004 the system will only sequence between 001 and 002 File 004 will never be played because File 003 is missing The Sequential Trigger is prioritized from T1 the highest to T8 the lowest However it does not mean a higher priority input can interrupt a lower one It only means that if multiple triggers are applied at the same time the highest priority wins Round Robin Trigger firmware 1 6 and above This mode is very similar to the Direct Trigger mode except that the inputs are not prioritized So if multiple inputs are tied to ground then their files will be played one after another instead of just the highest priority one Round Robin mode can only be used in conjuction with Non interruptible Playback
4. DM3028B EM3028B User s Manual Page 1 of 4 Technical Specifications Operation Mode playback only Sound File Format Windows WAV uncompressed PCM 22 05 or 44 1 KHz sampling rate 16 bit depth monaural Max Number of Sound Files Parallel Direct Mode 8 Parallel Binary Mode 128 Parallel Sequential Mode 792 Parallel Round Robin Mode 8 Parallel Script Mode 1000 Serial Control 1000 Memory Type CompactFlash card type 5V Max Memory Capacity 512MB Max Recording Time gt 1 hour Supply Voltage 10 32 VDC Typical Standby Current 150 mA Max Audio Output 40W 8 Ohm load Serial Interface RS 232 RS 485 Parallel Interface 8 inputs CMOS level Physical Dimensions DM3028B board only 5 6 x 4 2 x 1 3 EM3028B board metal case 6 0 x 4 8 x 1 7 Interface Descriptions Power Input Terminals VD amp GD Use a well regulated DC power supply to obtain the best sound quality Connect the power supply s positive output to terminal VD and the negative output to terminal GD Speaker Output Terminals S1 amp S2 The speaker output is bridged balanced Depending on the ambient temperature addi tional heat ventilation may be required to obtain maximum output If the built in power ampli fier is not to be used it can be disabled by moving the on board jumper J3 to the OFF position Busy Output Terminal BY This output is taken from a transistor s collect
5. END When Script 001 is triggered the system will play File 007 wait 3 seconds play File 899 and then jump to Script 168 Script 168 is an endless loop that plays File 001 once every 3600 seconds But since Script 168 is interruptible this endless loop can be broken by any later trigger Put the word END at the end of the Script You may add comments after END as they will not be read by the system In the DS Direct Script mode Script 001 008 are triggered via T1 T8 respectively but other scripts can only be triggered via the J ump command In the BS Binary Script mode Script 001 128 are triggered with the Binary Trigger method but other scripts can only be triggered via the J command Upon powerup or reset the system will automatically executes Script 000 once if it exists DM3028B EM3028B User s Manual Page 3 of 4 Serial Interface When the serial interface is enabled all parallel inputs are dis abled and parallel related modes are no longer applicable The serial interface consists of a female DB9 connector support ing either RS 232 or RS 485 but not both at the same time The default selection is RS 232 To use RS 485 you must move the on board jumper J2 to the 485 setting On the DB9 connector three pins are used for RS 232 pin 2 for RX pin 3 for TX pin 5 for ground Two pins on the same connector are used for RS 485 pin 1 for negative pin 9 for positive The hardware protocol is fixed
6. S Direct Script BN Binary Non interruptible BI Binary Interruptible BH Binary Holdable BS Binary Script SN Sequential Non interruptible SI Sequential Interruptible SH Sequential Holdable RN Round Robin Non interruptible RS Round Robin Script For serial control RS 232 RS 485 replace the two letter word with a two digit address ranging from 01 to 32 For DS and BS modes enter the Script starting from the second line Be sure to add the word END at the end of the Script After editing the configuration file be sure to save it as a plain text file ASCII text file or simply text file The system may not work if the configuration file is not created properly File Number Assignment Sound files on the flash card must be assigned a unique file num ber for identification The file number must always be three digits ranging from 001 to 999 Simply add the file number to the begin ning of the original filename for example O01 Bluejay wav Trouble Shooting Guide Parallel Interface Related 1 Plays no sound at all a File numbers are not assigned properly b The system is in the wrong mode due to missing or incorrect configuration file c If the flash card is inserted when the power is on the system may not work To fix this problem turn the power off for a few seconds to reset the system d Some CF cards especially if they have been used in digita
7. and Script Playback Playback Modes The Playback Mode defines how the playback is to proceed The Playback Mode does not apply when the system is controlled via the Serial Interface Non interruptible Playback The file is played once per trigger The playback is not interruptible except by the system reset Looping is possible by applying a con stant trigger on the input Interruptible Playback The file is played once per trigger if not interrupted The playback does not start until the trigger is removed input returns to 5V and it can be interrupted by a later trigger on any input Looping is not possible Holdable Playback The file is played for as long as the input is triggered looping if necessary It is not interruptible except by the system reset Script Playback firmware 1 5 and above Instead of playing a single file Script Playback executes a series of playback steps for each trigger Written in the configuration file the Playback Script consists of multiple lines each defining the steps for a particular trigger in the following format 2 Stepl Step2 Here is the trigger number and is one of the following N Non interruptible Interruptible H Holdable There are three types of Steps F H play File W H wait units of 0 1 second J jump to trigger Here is an example DS or BS N001 F007 W00030 F899 J168 1168 F001 W36000 J168 H033 F273
8. hould then sends a binary coded address byte ranging from 1 to 32 If there is a system with the matching address it will re spond by sending back an ASCII a within 100 ms Otherwise the selection process has failed and should be restarted Once the selection process is finished successfully the DTE can issue one of the following ASCII coded commands one byte at a time For each byte sent the DTE should expect to receive a proper confirmation within 100 ms If the confirmation is missing or in valid the whole session must be aborted The serial interface can be easily tested using a Windows utility program called Hyper Terminal usually found in Start Programs Accessories Communications Hyper Terminal allows you to send and receive data through the PC s serial port All you need to do is type the letters on the keyboard to send them and watch the screen for received data Note that to type the binary address on the PC s keyboard you must hold down the ALT key while entering the number on the nu merical keypad make sure the NUM light is on For example if you want to type address 12 you must hold the ALT key down press 1 2 then release the ALK key Serial Commands Play File DTE Sends F is the three digit file number System Confirms f is the same file number as above If the file exists it will be played once If the file does not exist the command will simply be ig
9. l cameras need to be reformatted with the FAT16 file system e The output volume may have been set too low Try turning it up 2 Plays a wrong File File numbers are not assigned properly The system is in the wrong mode due to missing or incorrect configuration file oo 3 Plays trashy sounds It s probably due to unsupported file formats such as 8 bit resolu tion and ADPCM coding Re digitize or convert the file into a sup ported format 4 Playback speed is too slow fast Unsupported sampling rates may result in wrong playback speed Re digitize or convert the file into a supported sampling rate 5 Plays a popping bursting noise once in a while The speed of the flash card is too slow Use a faster flash card or convert the file to a lower sampling rate Serial Interface Related 6 The DTE device receives strange characters Make sure the DTE device s serial port setting is 9600 baud 8 data bits no parity 1 stop bit 7 RS 232 does not support multiple unit addressing Does the DTE device still need to send the address byte after sending the initial letter A Yes It is because the protocol is designed to be uniform for both RS 232 and RS 485
10. nored If the system is playing or pausing when receiving the F com mand it will return the error code e instead of f Stop Playback DTE Sends S System Confirms s If the system is not playing at the time it will simply ignore the command If the system is playing or pausing at the time it will terminate the playback Pause Playback DTE Sends P System Confirms p If the system is not playing at the time it will simply ignore the command Resume Playback DTE Sends R System Confirms r If the system is not pausing at the time it will simply ignore the command Busy DTE Sends B System Confirms b if busy including pausing or s if not busy Error Code The system will confirm with an e if an invalid command is re ceived or if a valid command is received at the wrong time After receiving the error code the DTE device should restart the session from the beginning the selection process DM3028B EM3028B User s Manual Page 4 of 4 The Configuration File By default the system works in the following mode Parallel Control Direct Trigger Non Interruptible Playback To operate the system in other modes you need to create an ASCII text file called MODE TXT with one of the following two letter words on the first line Note that this file should be the only text file on the flash card DN Direct Non interruptible DI Direct Interruptible DH Direct Holdable D
11. or and internally pulled up to 5V through a 10K resistor R13 It drops to about 0 2V when the board is playing Maximum sink current is 100 mA When controlling an external relay be sure to remove resistor R13 and add a protection diode as shown in the diagram below System Reset Terminal RS Short terminal RS to the ground to reset the board Minimum reset duration is 100 ms Parallel Interface Terminals T1 T8 These inputs are internally pulled up to 5V through 10K resistors and protected with 1K in line resistors The Parallel Interface is enabled by default Power Light PWR The power light is turned on when power is applied Volume Pot VOL Turn the knob clockwise to increase the output volume It affects only the speaker output not the line output Line Output LINE 1 8 Mono Phone Jack This jack provides single ended line output for external amplification Serial Interface Connector DB9 Female The Serial Interface supports either RS 232 default or RS 485 but not both at the same time To select RS 485 move the on board jumper J2 to the 485 setting Note that the Serial Interface is disabled by default and it is mutually exclusive with the Parallel Interface Typical wiring diagram for push button activation TYPICAL WIRING DIAGRAM DRAWING NOT TO SCALE PWR O T8 T7 T6 T5 T4 T3 T2 T1 RS BY GD VD LINE VOL S1 S2 N C UNBALANCED LINE OUT TO EXTERNAL POWER AMP 10 30V DC
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