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1. IMC788 LDt Quad 5 Amp DMX 512 dimmer pack A publication of CDS advanced technology bv Maassluis The Netherlands Copyright 1995 2006 CDS advanced technology bv September 2006 All rights reserved This document may not in whole or in part be copied photocopied reproduced translated or reduced to any electronic or machine readable form without prior consent in writing from CDS advanced technology bv The supplied material hardware and software is intended for use only as described in the manuals Use of undocumented features or parameters may cause damage and unpredictable results for which CDS advanced technology bv can not assume responsibility Although every effort has been made to make the supplied material and its documentation as accurate and functional as possible CDS advanced technology bv will not assume responsibility for any damage incurred or generated by such material CDS advanced technology bv reserves the right to make improvements and changes in the product described in this manual at any time without notice LanBox LC and 788 LD are trademarks of CDS advanced technology bv User manual 788 LDt quad 5 Amp DMX 512 dimmer pack Table of Contents ccccccceccccceesessssseeeeeeeeeeeeens 2 FG Atur eS secs seisonnan ninen ENN 2 Installaatio N 35 3sscoscessasscsaegeveess dssaaiieosees a 2 Test MOE nenerniereiuorin riren NENE 2 DMX channel selection ccccccessseeeeeeeeees 2 Connecting t2. an be found Press a button for at least 3 seconds so that the displayed DMX address starts blinking Set the address to 0 so the pack enters the test mode Your lamps should fade in and turned off one by one After this test set the DMX address of the pack e g to 1 You should now be able to use the channels A B C and D by setting DMX channels 1 4 on your DMX controller In high resolution H 1 mode it needs two DMX adresses per output channel course fine 16 bit Connecting the 788 LD to a DMX controller To connect the 788 LD t to your DMX controller take the following steps e Connect the data output of your DMX controller to the DMX input of the 788 LD using 5 pin XLR cable which is standard DMX cable Possibly your DMX controller has a 3 pin XLR data output in which case you should use a cable that adapts from 3 to 5 pin XLR e If you are using only one 788 LD insert a termination plug into the DMX output connector of the dimmer pack e If you are using more than one DMX device connect the data output of each device to the data input of the next device The order in which the devices are connected together is not important so the most efficient cabling route may be used Plug a XLR termination plug into the last DMX device in the link e Possibly you want to connect 3 pin and 5 pin DMX devices together in one link In that case you should adapt from 3 to 5 pin XLR or from 5 to 3 pin XLR e Check the DMX activ
3. en switching on 4 lights of 1 kW at 230V a current of approx 4 x 40 160 Amp will flow causing the protection mechanism to detect a short circuit All outputs will be switched off To avoid this problem set the lights to the least possible output setting thus almost maximal dimmed the lights will be warmed continuously DMX indication The green rightmost decimal dot of the display indicates DMX activity and may be helpful searching for problems in DMX cabling or connection In an erroneous situation the green dot is off or lights at an alarming fierceness Possible problems in the DMX cabling are bad connections short circuits or twisted polarity of the DMX signals Technical specifications Power supply 100 240 Vac 50 60 Hz 16A Ambient temperature 0 40 Degrees Celsius Humidity 30 90 RH Dimensions 205 x 105 x 56 mm Output per channel max 5A 25 C Resolution 256 or1024 steps dimming This device complies with the European low voltage directive and the European EMC directive according to the following standards Electrical safety EN 60950 2002 Emission EN 55015 2000 Al 2002 A2 2002 Immunity EN IEC 61000 6 2 2001 Due to low frequency harmonics and heavy load fluctuations one must have official approval of the authorities to use this professional device on a public main supply FCC This equipment has been tested and found to comply with the limits for a class A digital device pursuant
4. etail picture of the electronics As you can see it s very compact and there have been used advanced techniques Like the black potted filter coils are cooled by using very special heat conducting foam which also make contact with the top of the green transformer The coil heat is transferred to the housing via the foam and the big aluminium strip A same strip is used to transfer the triac heat to the housing The coil temperature is measured by temperature sensors below each coil Teas ENEE Sa o A A modern single chip micro computer is used to control the triacs and to handle DMX and the display Page 4 788 LD
5. he 788 LD to a DMX controller 2 NOTE Sisirain aa E EEEa 2 Ooa eiaa t PERENE E 3 Channel Modes ccccccceesesssccccceeeesessneeeceeeeeees 3 Overload and short circuit protection 3 DMX indication ecccceccsscccccceesessssceeeeeeeeesees 3 Technical specifications 3 CE and FCC declarations ccccccessssecceeeeeeees 3 Safety Instructions siesena saraiki esans 3 Inside the 788 LDF eeeeeeseseereeresreeriereseerresreers 4 Features e Four independent dimmer switch channels each channel up to 5 Amp output Normal 8 bit or high resolution 16 bit dimming 5 pole XLR connectors conform USITT DMX 0 to 100 dimming or on off switching channels Controllable by any DMX 512 light controller such as the LanBox LC e Short circuit and overload protected without fuses e Suited for inductive ordinary and halogen loads e Complies to Isolated DMX512 A and DMX 512 USITT 1990 Installation The 788 LDt can be placed on floor or mounted on a truss with the included hook and loop straps Always use the included safety cord when mounting on a location where it could be potentially hazardous Connect your lamps with the included GST 18 3 connectors and connect the mains cable to a 16 amp fused main connection with safety ground Be sure the main voltage is between 100 and 240 Volt 50 60 Hz step 1 step 2 step 3 At the front end of the 788 LD a LED display and two buttons c
6. ity indication indicator on the 788 LD this is the rightmost decimal point on the display and if available a DMX activity indication LED on the DMX controller These indicators should flicker vaguely providing that the controller is active If the indication LED is constantly off or constantly on your cabling is not correct Note The LED display is normally off When you press one of the buttons the base DMX address and channel temperatures in tens of degrees Celsius is shown Note The intensity of the display depends on the number of characters shown and the main voltage Note The 788 LD t has isolated DMX connections so you don t have to worry about ground loops Be sure that the shield of the DMX cable is ONLY connected to pin 1 of the XLR NOT to the housing ground of the XLR Note Mains cable colouring in Europe is L Brown N Blue Ground Green yellow Tip Obtain USITT publication Recommended Practice for DMX512 as it contains very useful information about DMX installations Page 2 788 LD User manual 788 LDt quad 5 Amp DMX 512 dimmer pack Operation A DMX controller can select the dimming percentage of each output The selected DMX base channel number plus 3 7 in high res mode subsequent DMX channels are occupied by the 788 LDt The dimmer outputs will go to the dimming percentage selected by the DMX controller immediately after the DMX controller modifies this setting The DMX va
7. lues 0 255 0 0 255 255 in high res mode represents 100 0 dimming or 0 100 intensity Channel modes Default all four channels of the 788 LD are in dimming mode but there are 4 operating modes for each channel namely Dim Switch Off and On The mode can be set by pressing both buttons for at least 3 sec The plus button can then be used to select between the channels and H while the minus button toggles between the modes High resolution mode When the H channel mode is set to 1 the dimmer pack is in high resolution mode and uses two DMX addresses for one channel This mode is recommended for very smooth dimming of e g FL tubes and other fast reacting lamps Overload and short circuit protection When the 788 LD senses a short circuit situation all outputs are switched off immediately and the display shows a blinking S When a channel becomes overloaded the output is switched off and the display shows a blinking channel letter a b c or d After the overload situation has been solved normal operation will resume after the 788 LD internal temperature drops below the critical value An short circuit condition is detected if a current of more than 100 A flows for some short period of time This mechanism provides an adequate short circuit protection However when switching on cold lights a current equal to approximately 10 times the regular current will flow for a short period of time This means that wh
8. to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense Safety instructions e The 788 LDt is grounded through the power cord To avoid electric shock connect the power cord into a properly wired receptacle where earth ground has been verified by a qualified service person e Be aware that the housing can become very hot up to 75 degees centigrade this is normal e To avoid personal injury and warrant proper operation do not remove covers or panels from the 788 LDt Do not use the 788 LD in humid more then 90 RH environments If the 788 LDt must be mounted on a location where it could be potentially hazardous if the connection would get loose additional precautionary measures should be taken Use the included safety cord 788 LD Page 3 User manual 788 LDt quad 5 Amp DMX 512 dimmer pack Inside the 788 LDt er cee ee ne N L7 N As we do not advice to open the dimmer we provided a picture of the inside and a d
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