EM38A / EM38A-R / EM38A-X User's Manual Page 1 of 8 Available
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1. e instead of T lower case L At this point the command should be aborted You should use the Stop Play back command to stop the currrent playback first before starting a new one Stop Playback DTE Sends S System Confirms s If the system is not playing paused it will simply ignore the com mand Otherwise it will terminate the current playback Pause Playback DTE Sends P System Confirms p If the system is not playing it will simply ignore the command When the system is being paused its Busy output terminal BY is still active Resume Playback DTE Sends R System Confirms r If the system is not paused it will simply ignore the command Busy DTE Sends B System Confirms b if playing oaused or s otherwise Query Parallel Input Status DTE Sends Q System Confirms one status byte read from the parallel input This command is usually used when the parallel inputs are con nected to switches sensors and or other similar devices and you want to know the on off status of these devices Note that although the status of these devices can be read they cannot be used to trigger the audio because the Parallel Interface is disabled when the Serial Port is enabled The status byte has T1 as the LSB and T8 as the MSB Note that an input is at logic 1 when connected to 5V or left unconnected and it is at logic O when connected to OV the ground This command can be issued at any time Scrip2. RS 485 mode with an address of 66 You may use Windows Notepad or Wordpad to create the file just be sure to save the file as text only In addition to the MODE TXT file you also need to put a test sound file on the flash card For testing purpose this sound file should be called 001 mp3 The next step is to connect the player to the PC using a straight through serial cable not a null modem one A straight through cable has pin 2 connected to pin 2 pin 3 connected to pin 3 and pin 5 connected to pin 5 Those are the only three pins we use Other pins whether connected or not do not matter Power up the player and run HyperTerminal on the PC On Win dows XP this program is found under Start gt All Programs gt Accessories gt Communications Create a new connection on the COM port to which the player is connected with the following parameters Bits per second 9600 Data bits 8 Parity None Stop bits 1 Flow control None Now we are ready to send the following commands to the player We Type Player Responds A B a see notes below F f 0 0 0 0 1 1 At this point the player should start playing the test sound file and the test is considered successful Note that we typed B as the RS 485 address code because the binary value of ASCII B is 66 the number we put in the MODE TXT file earlier If we had used 00 in the MODE TXT file earlier to put the system into the RS 232 mo
3. The GD terminal is ground connected internally to the power ground Reset Input Terminal RS Connect this input to the ground momentarily to reset the unit Min duration is 100 ms Busy Output Terminal BY This open collector output from an internal transistor can be controlled with more flex ibility if the unit runs in the Script mode In all other modes it is automatically turned on while playing audio with a maximum sink current of 200 mA It can be used to synchro nously activate an external relay for switching on a device such as a lamp or a motor Power Input Terminals V GD Use a well regulated DC power supply to obtain the best sound quality Connect the power supply s positive output to terminal V and the negative output to terminal GD Alterna tively power can also be supplied via the 2 1mm center positive coaxial jack located on the left side of the unit Line Output LINE 1 8 Stereo Phone Jack This jack provides single ended line output Balance Pot BAL This pot adjusts the output balance between the two channels It should be set at the middle center detent if the unit is configured for BTL bridge tied load mono out Volume Pot VOL Turn this pot clockwise to increase the output volume It affects both the speaker and the line out Speaker Output Terminals LF left channel GD RT right channel See the Speaker Connections section Serial Port DB9 Female The default setting is RS 232 To se
4. received at the wrong time At this point the command should be aborted Trouble Shooting Guide 1 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 EM38A EM38A R EM38A X User s Manual Page 7 of 8 Application Example Using Normally Open Push Buttons LINE GD T8 T7 T6 T5 T4 T3 T2 T1 RS BY GD V FDR C0000000 FF BUTTON 2 1 1 Play without interruption Intended Operation Press button 1 to play file 001 once Press button 2 to play file 002 once When playing pressing any button has no effect Required Text in MODE TXT None this is the default mode DN Notes The button can be released or held down when playing lf the button is held down when the playback finishes the sound will be played again lf both buttons are pressed or held down at the same time button 1 prevails 2 Allow interruption during playback Intended Operation Press button 1 to play file 001 once Press button 2 to play file 002 once Playing can be interrupted by pressing any other button Required Text in MODE TXT DI Notes When playing pressing the same button again has no effect 3 Play the sound only once even if the button is held down Intended Operation Press button 1 to play file 001 Press button 2 to play file 002 Don t repeat the sound even if t
5. EM38A EM38A R EM38A X User s Manual Page 1 of 8 Available Models EM38A no internal relays EM38A R 8 relays for simple control EM38A X 8 relays for complex control Technical Specifications Operation Mode playback only Sound File Format MP3 ISO 11172 3 Max Number of Sound Files Parallel Direct Mode 8 Parallel Binary Mode 128 Parallel Sequential Mode 8 x 99 Parallel Round Robin Mode 8 Parallel Script Mode 999 Serial Port 999 Memory Card Type SD SDHC Max Memory Capacity 2 GB for SD FAT FAT16 32 GB for SDHC FAT32 Max Recording Time w 2GB card 33 hours based on 128 kbps bit rate Supply Voltage 12 30 VDC Typical Standby Current 60 mA Audio Output 30V supply 8 Ohm load 10 THD N High efficiency class D Stereo 15W per channel Mono 55W bridge tied load BTL Serial Interface RS 232 RS 485 Trigger Inputs 8 inputs contact closure or 3 3V 5V logic Physical Dimensions EM38A 5 3 x 4 x 1 35 EM38A R amp EM38A X 5 3 X 6 7 x 1 35 Inputs Outputs amp Controls Power Light PWR The power light is turned on when power is applied Trigger Inputs Terminals T1 T8 GD The trigger inputs terminals are enabled by default but disabled automatically if the serial port is enabled Both dry contact closure and 3 3V 5V logic signal are acceptable Trigger inputs may work differently depending on the particular trigger mode described later
6. Notes The sensor connected to T1 has the highest priority and the sensor connected to T8 has the lowest priority 3 Play when the switch sensor opens but don t repeat Intended Operation Play file 001 when sensor 1 opens Play file 002 when sensor 2 opens Do not repeat the sound Required Text in MODE TXT DSB N001 F001 J999 N002 F002 J999 H999 J999 END Notes The system will stay in the H999 J999 endless loop for as long as the sensor is open The system will not respond to other sensors until this one is closed
7. back Mode N Non interruptible Interruptible H Holdable S Script Third Letter Trigger Polarity C or no letter Close Contact O Open Contact M Make Contact B Break Contact To enable the serial port RS 232 RS 485 instead of the three letters described above put a two digit number ranging from 01 to 99 This number becomes the address of this unit on the serial bus and therefore should be unique For Script 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 purpose The file number must be a three digit number within the following range For Direct Trigger 001 008 For Binary Trigger 001 128 For Sequential Trigger and Serial Control 001 999 Simply add the file number to the beginning of the original filename e g 001 tiger mp3 Note that if you want to store the maximum number of files on the flash card you should keep the filenames including the file number within 8 characters and use numbers and capital letters only Relay Control EM38A R EM38A X only The relays are controlled differently in different mo
8. de then this B should not be typed If you made a mistake and typed a wrong letter during the test the player will either respond with a letter e for error or not respond at all depending on the situation In this case you need to re type the command from the very beginning EM38A EM38A R EM38A X User s Manual Page 6 of 8 Serial Commands 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 byte Play File DTE Sends F is the three digit file number System Confirms f is the same file number as above lf the file exists it will be played once If the file does not exist the system will simply ignore the command If the system is playing paused when the F letter is received it will return the error code e instead of f At this point the command should be aborted You should use the Stop Playback command to stop the currrent playback first before starting a new one Loop File DTE Sends L is the three digit file number System Confirms l is the same file number as above If the file exists it will be played repeatedly If the file does not exist the system will simply ignore the command If the system is playing paused when the L letter is received it will return the error code
9. des QSA mode EM38A X only Relays are pre programmed for synchronized activations during audio playback by using the Windows based user friendly QSAplay program A PC is needed for programming only but not for the actual operation Serial port mode Relays are controlled by commands received via the serial port Please see the Serial Commands section for details Script mode Relays are controlled by script commands Please see the Script Mode section for details All other modes A relay will turn on when the corresponding file is being played Relay 1 corresponds to file 001 relay 2 corresponds to file 002 and so on For example relay 8 will be turned on when file 008 is being played Trouble Shooting Guide 1 No sound 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 recycle the power or use the RS input to reset the system The output volume may have been set too low Try turning it up Plays the wrong file File numbers are not assigned properly The system is in the wrong mode due to missing or incorrect configuration file OM Nl 2 3 Noisy playback The speed of the flash card is too slow Use a faster flash card or convert the file to a lower bit rate EM38A EM38A R EM38A X User s Manual Page 5 of 8 Seria
10. file 007 wait 3 seconds turn on the Busy output play file 899 turn off the Busy output jump to trigger 168 1168 Trigger 1168 is executed as the following play file 001 wait 60 minutes jump back to itself Since trigger 1168 is interruptible this endless loop can be broken by any future trigger Trigger H033 will never be executed because it is an indirect trig ger in the DS mode yet it is not jumped to by any other trigger Background Music Example The automatic execution feature can be used to play background music while no trigger is being executed For example DS l000 F 123 J000 N001 F001 J000 N002 F002 J000 N003 F003 J000 END Here file 123 is looped from power up but can be interrupted by trigger inputs T1 T2 and T3 After interruption it always jumps to trigger 000 so file 123 starts to loop again although from the be ginning instead of where it left off EM38A EM38A R EM38A X User s Manual Page 4 of 8 System Configuration File By default the system works in the following mode without a configu ration file Trigger Input Parallel Trigger Mode Direct Playback Mode Non Interruptible Trigger Polarity Close Contact To operate the system in any other modes you need to create a plain text file called MODE TXT with a line of three letters First Letter Trigger Mode D Direct B Binary S Sequential R Round Robin Second Letter Play
11. he button is held down Required Text in MODE TXT DS N00O1 F001 J888 N002 F002 J888 H888 J888 END Notes The system will stay in the H888 J888 endless loop for as long as the button is held down 4 Play only when the button is held down Intended Operation Press amp hold button 1 to play file 001 Press amp hold button 2 to play file 002 Required Text in MODE TXT DH Notes Playing stops as soon as the button is released If the same button is pressed again later playing re starts from the beginning of the file instead of where it left off lf both buttons are held down button 1 prevails To play both sounds alternately when both buttons are held down use the RH mode 5 Play different sounds each time when the same button is pressed Intended Operation Press button 1 to play file 001 the first time file 002 the second time and etc Button 2 sequences through file 201 202 When playing pressing any button has no effect Required Text in MODE TXT SN Notes Up to 99 files can be assigned to each button and file numbers but be consecutive To allow playback interruption use the SI mode To play only when the button is held down use the SH mode In the SH mode the same sound will repeat for as long as the button is held down To advance to the next sound the button must be released first 6 EM38A R Turn on a single different relay for each sound In
12. k in the sequence For example if there are only three files on the flash card 001 002 and 004 the system will only sequence from 001 to 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 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 con junction with Non interruptible Playpack and Script Playback Parallel Playback Modes Non interruptible Playback default 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 Any input but itself can interrupt the playback Looping is possible by applying a constant trigger on the input 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 Please see the Script Playback Mode section for descrip
13. l Interface When the serial interface is enabled all parallel inouts T1 T8 are disabled and all Parallel Modes are no longer available The serial interface consists of a female DB9 serial port supporting both RS 232 default setting and RS 485 To support RS 485 you must move the internal jumper JP1 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 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 Mode on the system the configuration file must contain a two digit code ranging from 00 to 99 These two digits are the only text required for the configuration file If the code is 00 the system enters the RS 232 mode If the code is within 01 to 99 the system enters the RS 485 mode and uses the code as its address on the RS 485 bus Both the RS 232 mode and the RS 485 mode use the same soft ware protocol except that in the RS 232 mode the address byte is not u
14. lect RS 485 move the internal jumper JP1 to the 485 setting The serial port is disabled by default To enable the serial port you must create a configuration file MODE TXT on the flash card as described later The trigger inputs are disabled automatically when the serial port is enable DC Adaptor Jack Instead of the power input terminals power can also be supplied via this 2 1mm center positive coaxial jack located on the left side of the unit Relay Output Terminals EM38A R amp EM38A X only Three terminals are provided for each relay NC Normally Closed NO Normally Open and Common The contact is rated at 12A 120VAC or 10A 24VDC Typical wiring diagram for push button activation LINE GD T8 T7 T6 T5 T4 T3 T2 T1 RS BY GD V iFGDRT EM38A EM38A R EM38A X User s Manual Page 2 of 8 Parallel Trigger Modes Parallel Trigger Mode defines how the playback is to be triggered via the trigger inputs All inputs are internally pulled up and if left unconnected have a voltage of 3 3V logic 1 5V signal is toler ated and also seen as logic 1 Logic O is ground Direct Trigger default 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 highe
15. r 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 should 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 described below However the total number of files cannot exceed 511 unless the memory card is formatted with the FAT32 file system T1 triggers File 001 099 T2 triggers File 201 299 T8 triggers File 801 899 Each trigger on the same input activates the next file in the se quence The sequence automatically restarts when either the end of the sequence is reached or there is a brea
16. s closed play all corresponding files sequentially Repeat the file s until power is turned off Required Text in MODE TXT RN Notes lf priority is required use DN instead of RN In this case switch 1 has the highest priority switch 2 has the sec ond highest priority and switch 8 has the lowest priority If more than one switch is turned on only the file for the switch of the highest priority will be played 2 Repeat at intervals on power up Intended Operation Same as the example above but play files at fixed intervals Only files with corresponding switches closed will play Required Text in MODE TXT RS N001 F001 W06000 N002 F002 W06000 NOO8 F008 W06000 END Notes W06000 is a delay loop of 6000 x 0 1 second 10 minutes so the file s will be played at an interval of 10 minutes one file at a time Intended Operation Play file 001 when sensor 1 opens Play file 002 when sensor 2 opens Repeat the sound for as long as the sensor is open lf multiple sensors are open at the same time play all corresponding files sequentially Required Text in MODE TXT RNO Notes Unused inputs must be connected to the ground as shown in the wiring diagram 2 Play when the switch sensor opens with priorities Intended Operation Same as the example above but if multiple sensors are open at the same time the sensor of the highest priority prevails Required Text in MODE TXT DNO
17. sed see below 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 otherwise commands may not be received properly A communication session always starts with an initial process The DTE always initiates the communication by sending an ASCII A followed immediately by the binary code for the RS 485 address For the RS 232 mode the address code is not used sent The de vice should respond by sending back an ASCII a within 100 ms Otherwise the initial process has failed and should be restarted After the initial process the DTE can issue the command one byte at a time For each byte sent the DIE should wait to receive a proper confirmation within 100 ms If the confirmation is missing or invalid the whole session must be aborted The initial process must precede each and every command Testing the Serial Port The serial port can be easily tested by using a Windows utility pro gram called HyperTerminal HyperTerminal 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 The first step is to create a text file called MODE TXT on the flash card Put only two letters in the file 66 This will put the player into the
18. t Command DTE Sends C C is one line of script commands System Confirms c c Is an echo of the script line For example if you send CF001W00020F002C then the system would confirm with cf001wO00020f002c as the characters are be ing received Upon receipt of the second C the system would execute this script line as described below play file 001 F001 wait 2 seconds W00020 play file 002 F002 Refer to the Script Playback Mode section for details on how to write the script Relay On EM38A R amp EM38A X only DTE Sends XN Is the relay number System Confirms xn is the same relay number as above For example XN3 turns on relay 3 To turn on all relays use XNN This command can be issued at any time Relay Off EM38A R amp EM38A X only DTE Sends XF is the relay number System Confirms xf is the same relay number as above For example XF2 turns off relay 2 To turn off all relays use XFF This command can be issued at any time Send Binary to Relay EM38A R amp EM38A X only DTE Sends Xnnn nnn is a 3 digit number with leading zeros System Confirms xnnn nnn is the same number as above For example X005 turns on relay 1 and 3 and turns off all others because the binary code for 005 is 00000101 Serial Command Error Code The system will confirm with an e if an invalid command is re ceived or if a valid command is
19. tended Operation Turn on relay 1 when playing file 001 Turn on relay 2 when playing file 002 Required Text in MODE TXT Only the mode letters are required for example DH 7 EM38A R Turn on multiple relays for each sound Intended Operation Press button 1 to play file 007 and turn on relays 1 amp 2 Press button 2 to play file 008 and turn on relays 2 amp 3 Required Text in MODE TXT DS N0O1 XN1 XN2 F007 XFF N002 XN2 XN3 F008 XFF END Notes XFF is used to turn off all relays 8 EM38A X Pre program relays for synchronized activations during audio playback The relays will be activated automatically when playing QSA files There is no required text in MODE TXT EM38A EM38A R EM38A X User s Manual Page 8 of 8 Application Example Using Normally Closed Switches amp Sensors Application Example Automatic Playback on Power up LINE GD T8 T7 T6 T5 T4 T3 T2 T1 RS BY GD V FGDRT O 0900000990005 990 LINE GD T8 T7 T6 T5 T4 T3 T2 T1 RS BY GD V FDR BAL VOL 1 Repeat continuously on power up Intended Operation Normally closed switches and sensors are often used in security Play file 001 on power up if switch 1 is closed systems Play file 002 on power up if switch 2 is closed aai 1 Play when the switch sensor opens with no priorities Play file 008 on power up if switch 8 is closed lf more than one switch i
20. tions Parallel Trigger Polarity Close Contact Input is continuously triggered when it s at OV ground Open Contact Input is continuously triggered when it s left open or at 3 3V 5V Make Contact Input is triggered one time as it goes from 3 3V 5V to OV Break Contact Input is triggered one time as it goes from OV to 3 3V 5V Speaker Connections Regular Stereo Virtual Surround Stereo LF GD RT LF GD RT The left channel signal is internally inverted and that s why the left speaker has an inverted polarity for regular stereo output If the left speaker is not inverted then the output is virtual surround stereo Regular Mono BTL Mono 4X Output Power LF GD RT LF GD RT Since BTL mono provides four times the output power of regular mono at the same supply voltage it is often used to boost the output power when the supply voltage is low However the speaker impedence should not be lower than 8 Ohms to avoid overloading the power amp EM38A EM38A R EM38A X User s Manual Page 3 of 8 Script Playback Mode Instead of playing a single sound file the Script Playpack mode executes a script of commands for each trigger Note that the Busy output will not turn on off automatically in the Script mode It must be specifically turned on off with the BN and the BF commands Written in the configuration file using plain text the script consists of multiple lines each containing the commands for a particular
21. trigger in the following format nnn Command1 Commandz Here nnn is the trigger number and is one of the following N Non interruptible Execution of this trigger is not interruptible l Interruptible Execution of this trigger can be interrupted by any trigger other than itself H Holdable Execution of this trigger continues for as long as the trigger is ap plied repeating itself if necessary The execution stops immedi ately when the trigger is removed In the DS and RS modes there are 8 direct triggers 001 008 corresponding to T1 T8 In the BS mode there are 128 direct triggers 001 128 corresponding to the binary code on T1 T7 In addition to the direct triggers there are also indirect triggers An indirect trigger can be activated only by jumping from another trig ger using the Jump command In the DS and RS modes there are 991 indirect triggers 009 999 In the BS mode there are 871 indirect triggers 129 999 These are the script commands Fnnn play File nnn Example F168 plays file 168 Wnnnnn wait nnnnn units of 0 1 second Maximum value for nnnnn is 65535 6553 5 seconds Example W00020 wait 2 seconds Note W00000 wait forever Jnnn jump to trigger nnn Example J007 jumps to trigger 007 BF turn off the Busy output Use this command to turn the Busy output off BN turn on the Busy output Use this command to turn the Busy output on XNn
22. turn on relay n EM38A R amp EM38A X only Example XN8 turns on relay 8 XNN turn on all relays EM38A R amp EM38A X only Example XNN turns on all relays XFn turn off relay n EM38A R amp EM38A X only Example XF6 turns off relay 6 XFF turn off all relays EM38A R amp EM38A X only Example XFF turns off all relays Xnnn send binary to relay EM38A R amp EM38A X only Example X63 turns on relay 1 6 because 63 binary 00111111 END Always add the word END at the end of the entire script You may add any comments for your own reference after END Important Notes All command letters must be in upper case Script lines must be separated by carriage returns the Enter key A script line is limited to 128 characters excluding and If more space is needed use the Jump command Automatic Execution of Script 000 Upon powerup or reset the system will automatically executes script 000 once if it exists Script Examples DS NO01 F007 W00030 BN F899 BF J168 1168 F001 W36000 J168 H033 F273 END DS is not really a script command but it tells the system to enter the Direct Script mode You can also use RS or BS to enter the Round Robin Script mode or the Binary Script mode When the T1 input is triggered the system start executing trigger N0OO1 Since this trigger is non interruptible it will always executes to the end Trigger NOO1 is executed as the following play
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