DMXADP A compact DMX I/F for PC Parallel Port
Contents
1. to let the main CPU of the PC concentrate to scene fading and sequencing The functions accomplished by the DMXADP are the generation of the DMX 512 signal Master Mode to control a set of devices connected to the line and the acquisition of the DMX 512 signal Slave Mode to capture the DMX patterns generated by any traditional console and let them be processed by software All the device functions are automatically managed by dedicated machine language drivers provided with the hardware or integrated with the software packages see Appendix B for details The DMXADP hardware allows complete control of the 512 channels defined by the DMX 512 standard The line interface is short circuit and surge voltage protected DMXADP is a compact enclosure that connects to the Parallel Port and is externally powered by a 5VDC 150mA source The standard cabling supports pass through powering from the Keyboard Mouse port of the computer letting the keyboard mouse be usable if required This lets DMXADP be usable on any PC either desktop or portable with no additional equipment The standard cable is able to universally connect to any keyboard connector configuration An optional wall cube adapter called ACADAP is provided in case the keyboard port is not available or not adequate for powering DMXADP ACADAP is designed to regulate the output of any DC or AC adapter into the 5 VDC required by DMXADP DMXADP LPT to DMX 512 Interface User s Manual V12. 6 C DMXEasy 1996 1997 Page 5 of 12 2 Unpacking and Installing The DMXADP package code ADPBPK see Appendix C contains the following items the DMXADP unit a DMX Power cable shipped already attached to the base unit adapters for DIN keyboard connectors floppy disk s with Test Software and User s Manuals Tu ES Before installing DMXADP verify that all of the items above are present and in good conditions For any problem refer to the DMXADP dealer Figure 1 shows the external aspect of the DMXADP unit outlining the connectors and indicators accessible by the user STS Led DB 25F to DMX PW cable DB 25M to PC LPT port Figure 1 DMXADP external view As show DMXADP is a very compact enclosure using the same packaging of popular RS 232 gender changer adapters This makes moving across different computers very easy The external connections are done to the LPT port with the DB 25M male connector side and to the DMX Power cable with the DB 25F side In the standard shipping configuration the DMX Power cable is already attached at the base unit and it may be remoded for troubleshooting if required The only user visible indicator is the STS Led used that provides a visual indication of the DMX line traffic DMXADP LPT to DMX 512 Interface User s Manual V1 6 C DMXEasy 1996 1997 Page 6 of 12 pv The installation process is accomplished through the following steps Turn off the computer Conn
3. Interface User s Manual V1 6 C DMXEasy 1996 1997 Page 1 of 12 Dhu n Liahting ME DMXADP A compact DMX I F for PC Parallel Port Hardware User s Manual Ver 1 6 C DMXEas Mila ii ruxe elles http www ien nteraction it lighting DMXADP LPT to DMX 512 Interface User s Manual V1 6 C DMXEasy 1996 1997 Page 2 of 12 THIS PAGE INTENTIONALLY LEFT BLANK DMXADP LPT to DMX 512 Interface User s Manual V1 6 C DMXEasy 1996 1997 Contents 1 GENERAL INFORMATION 2 UNPACKING AND INSTALLING 3 SLAVE MODE OPERATION 4 MASTER MODE OPERATION 5 STATUS LED 6 ELECTRICAL AND MECHANICAL CHARACTERISTICS 7 TECHNICAL DATA APPENDIX A TROUBLESHOOTING APPENDIX B LIST OF AVAILABLE OPTIONS Page 3 of 12 10 11 12 DMXADP LPT to DMX 512 Interface User s Manual V1 6 C DMXEasy 1996 1997 Page 4 of 12 DMXADP DMxX Parallel Port Adapter Hardware Users s Manual Version 1 6 1 General information This manual describes the main features and the installation procedure for the DMXADP product hardware DMXADP is a compact miniature adapter that allows to interface a DMX 512 lighting equipment line through a standard PC parallel port LPT It is intended for general purpose DMX interfacing and is offered with different sofware environments for different tasks The main feature of DMXADP is to be intelligent meaning that all DMX 512 timing and control tasks are performed by a dedicated microcontroller
4. e green Status LED indicator STS This indicator is provided to notify the result of the microcontroller Built In Self Test and to provide a steady state visible indication of the functions performed on the DM X 512 line Status LED indicator state MASTER MODE phase initialization in progress BIST OK ready for command DMX 512 transmission active SLAVE MODE phase initialization in progress BIST OK ready for command DMX 512 acquisition in progress acquisition done frame transfer transfer done ready for next command LED state off on flash 4 packets LED state off on off on on Table 2 Status LED functions DMXADP LPT to DMX 512 Interface User s Manual V1 6 C DMXEasy 1996 1997 Page 9 of 12 6 Electrical and Mechanical characteristics DMXADP is a DC powered device Power is normally supplied through the PC keyboard mouse port Maximum current requirement is 150mA The DMX line interface is transient voltage and AC short protected This minimizes chances to damage the PC in presence of voltage transients induced on the DMX line or of user miscabling that could result in shorting the AC line on the DMX lines In any case maximum care should be put in the DMX cabling to satisfy safety and noise immunity standards DMXADP is housed in the standard format DB 25 gender changer enclosure The external dimensions 54mm wide x 17mm high x 63mm deep make DMXADP very easily connected to all PC models includin
5. ect DMXADP to the LPT port of the PC Connect the DMX PW cable to the DMX line and to the Keyboard Mouse port The shipped PS 2 to DIN adapters may be removed in case of PS 2 KBD Mouse ports If removed save them in a safe place for future use of DMXADP on DIN type KBD Mouse ports Figure 2 shows the external connections of DMXADP once installation is complete the case of use with the Intelligent Cable option is shown with the Base Cable a separate DMX termination plug is required for Master mode applications DMX 512 outgoing line XLR 5M PS 2 DIN adapter if required DIN PS 2 adapter if required DIN 5M to Keyboard port DB 25M to PC LPT port Figure 2 DMXADP connections DMXADP LPT to DMX 512 Interface User s Manual V1 6 C DMXEasy 1996 1997 Page 7 of 12 3 Slave Mode operation One of DMXADP functions is to operate as a DMX 512 signal capture device This mode of operation is called Slave Mode While in Slave Mode DMXADP is able acquire the signal propagated from the DMX IN male connector When a DMX Capture command is received from the LPT interface the microcontroller of DMXADP acquires the channel state from a DMX 512 line locally and then transfers the acquired DMX frame to the CPU AII 512 channels may be captured with full 8 bit resolution Given the limited dynamical capabilities of the pseudo bidirectional mode of the PC LPT interface this operation is only applicable to static DMX 512 config
6. g very compact battery operated notebooks DMXADP LPT to DMX 512 Interface User s Manual V1 6 C DMXEasy 1996 1997 Page 10 of 12 7 Technical data DMXADP V1 0 TECHNICAL DATASHEET Features Intelligent microcontroller based DMX IN OUT interface Connectors LPT DB 25M Standard Parallel Port DMX PW DB 25F to DMX in DMX out Power Indicators LED Built In Self Test and DMX line traffic DMX 512 interface RS 485 compatible 250Kbit s surge and AC short protected Power External 5VDC 150mA through provided Keyboard Mouse port adapter cables or via optional ACADAP wall cube adapter Dimensions 54mm W x 17mm H x 63mm D Weight 100g DMXADP LPT to DMX 512 Interface User s Manual V1 6 C DMXEasy 1996 1997 Page 11 of 12 APPENDIX A Troubleshooting This appendix gives instructions on how to resolve some simple situations that the user may encounter when using DMXADP For problems that cannot be resolved using this section refer to your DMXADP dealer T1 Turning on the PC the STS LED does not turn on This indicates that either the DC power is not properly applied to DMXADP or the internal microcontroller has not passed Buil In Self Test Make sure DMXADP cable is properly connected to the Keyboard Mouse port and recheck Try on a different PC to exclude a defective Keyboard Mouse port If available try with the external wall cube adapter ACADAP If after checking power the LED does not turn on contact your dealer for assi
7. stance T2 The DMXADP software reports Sense Timeout errors Someting is wrong in the communication between the PC and DMXADP Check the connection of the LPT connector Avoid switching power off to DMXADP while PC is still on always power on DMXADP while powering on the PC If the problem persists contact your dealer for assistance T3 In master mode no signal is detected by DMX receivers dimmers etc If a new DMX appliance receiving module is being used check it for full compliance with USITT DMX 512 1990 If the module is presumed to conform to the specification verify the output of DMXADP in Master Mode with a DMX tester or another DMXADP used in Slave Mode If problems are found with the DMX signal contact your dealer for assistance There are no user replaceable parts inside DMXADP DMXADP LPT to DMX 512 Interface User s Manual V1 6 C DMXEasy 1996 1997 Page 12 of 12 APPENDIX B List of available options This appendix lists the product codes for DMXADP and the currently available options ADPBPK ADPAPK ACADAP DMXDOS DMX97 DMXPLUS DLL Base Package including DMXADP hardware DMX PW regular cable Terminator Plug Test Software and User s Manual 2 Floppy Disks Advanced Package including DMXADP hardware DMX PW intelligent cable Test Software and User s Manual 2 Floppy Disks Wall cube adapter option Input 7 5 15VAC or VDC output 5VDC Personal Console Software MS DOS version to
8. turn the PC in a Personal Lighting Console capable of DMXOut and DMXIn Distributed on Floppy Disks including Software User s Manual Personal Console Software Windows95 version to turn the PC in a Personal Visual Lighting Console capable of DMXOut and DMXIn with integrated scanner and multimedia control features Distributed on Floppy Disks including Software User s Manual Library for DMXPlus DMXAdp control Microsoft Win32 compliant to integrate DMXADP in an OEM s custom lighting software Distributed on Floppy Disks including User s Manual
9. urations and it is not meant to acquire cross fade profiles or one shot DMX configurations In Slave Mode the DMXADP microcontroller automatically identifies the actual number of channels up to 512 driven by the external console and then reports back to the CPU the startcode and the string of the acquired channels with their intensity level In Slave Mode the Status LED is flashed every time a valid DMX configuration has been acquired If no signal is found missing signal or DMX IN unplugged the LED is not flashed and a null channel count is returned as a capture timeout condition 4 Master Mode operation Master Mode is entered on reception of a DMX Drive command from the software In this case DMXADP hardware enables the internal DMX 512 line driver onto the DMX OUT female connector In Master Mode the DMX line is entirely under control of DMXADP In Master Mode the Status LED is toggled every four packet transmission providing a visual indication of the DMXADP drive activity With the Intelligent Cable option DMXADP has integrated source DMX 512 termination The termination is automatically inserted on the line whenever DMXADP is set in Master Mode In this case the DMX IN line is automatically disconnected to avoid conflict on the DMX line when DMXADP is switched between Master and Slave modes This feature is ideal for backup applications when idle or switched off DMXADP propagates the input signal from the master console and is read
10. y to take control of the line insulating master console at any time With Regular Cable an XLR female termination plug must be externally connected to the far end male connector of the cable when driving DMX line in Master mode and should not be connected when operating in Slave mode DMXADP is capable to identify the cable type and prompt the user to disconnect DMX IN signal and insert the termination before driving DMX The microcontroller of DMXADP generates DMX 512 timing following the recommendation of USITT 1990 standard guaranteeing 44 frames sec The timing characteristics of the signal driven by DMXADP in Master mode are specified in Table 1 with reference to the parameters defined in the USITT 1990 standard April 1990 reprinted June 14 1990 by United State Institute of Theatre Technology Inc DMXADP is able to drive any DMX device that complies with the USITT standard in case problems are encountered with a particular DMX device refer to the device manufactorer to investigate incompatibility with USITT 1990 timing using Table 1 as a reference DMXADP LPT to DMX 512 Interface User s Manual V1 6 C DMXEasy 1996 1997 Page 8 of 12 DMX 512 timing Break Mark after break Inter frame time Mark between frame Mark after last channel Refresh rate 512 channels 5 Status LED min 100 max 300 40 84 40 40 44 unit us us us us us us Hz Table 1 DMX 512 timing Table 2 summarizes the functions of th
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