ACDC 1999 User Manual
CONTENTS Chapter 1: Introduction...3 1.1 Features... 3 1.2 Applications... 3 1.3 Safety Warnings... 3 Chapter 2: Mounting and Installation...4 2.1 Unit Connection... 5 2.2 Cable type / length limitations for different LED loads... 7 Chapter 3: Unit Setup and Operation...8 3.1 Unit Power-Up Sequence... 8 3.2 ACDC 1999 LCD Control Panel... 9 3.3 Menu Map... 10 3.4 Menu Options and Descriptions... 11 DMX SETUP... 11 EFFECT SETUP... 12 FIXTURE SETUP... 12 OBSERVE... 13 LCD CONTRAST... 13 3.5 Example scenarios for Current setup... 14 3.6 RDM Functionality (From software version 1.28 onwards)... 15 3.7 LED Driver Thermal Protection... 17 Motherboard ThermACDCor... 17 PSU Forced Air Cooling Sensors... 17 Output Stage Digital Temperature Sensors... 17 PSU Thermal Protection Shutdown... 17 3.8 LED Fixture Thermal Protection... 18 Chapter 4: Technical Data...19 2 of 19
Chapter 1: Introduction The ACDC1999 is a 1U rack mountable product, multiple current source solution, which caters for applications for up to 2 zones x 336W (at 25 o C) per ACDC1999. The 24 channel (8 outputs with 3 channels per output) DMX-512 controllable independent current sources, allow all the flexibility you need in driving your high brightness LEDs. 1.1 Features DMX512-A compliant with auto-addressing functionality RDM Remote Device Management (Optional) Setup via front panel LCD interface Smooth LED light dimming Continuous current output eliminates flickering Very high efficiency (up to 95%) Auto Load Detection Allowing connection of multiple LEDs per channel Self diagnostics prevent damage to the unit and to the LEDs Wrong wiring, open/short protection for each output with indication on LCD TP Thermal protection of LEDs on each output (on supported LED luminaires) DRTP Thermal Protection algorithm prevents driver from overheating 1U Rack mountable chassis for easy installation 1.2 Applications Architectural illuminations LED Lighting effects Theatrical LED lighting Commercial Lighting Home Lighting 1.3 Safety Warnings 1. The unit is intended for maximum operating ambient temperature 40 o C. 2. 15A shall be provided in building installation for connection to the mains supply. 3 of 19
Chapter 2: Mounting and Installation The ACDC1999 is designed in a 1U rack mountable chassis for easy installation into a rack enclosure. The chassis also incorporates rear mount supports for securing to the rear of the rack enclosure to remove any pressure on the chassis from cables being inserted in the rear of the product. For proper installation and subsequent operation of each unit, pay special attention to the following recommendations: Upon unpacking the product, inspect the contents of the carton for shipping damages. Do not install damaged units. Ensure proper ventilation of each unit and avoid areas where corroding, deteriorating or explosive vapours, fumes or gases may be present. Allow for proper clearance of unit enclosure and wiring terminals for easy access, hardware configuration and maintenance. Ensure the unit is securely attached, properly mounted if positioned in a rack enclosure, and free of excessive vibration. Avoid touching the chassis surface during the operation, power down the unit and allow it to cool down before touching the chassis. The chassis can get hot during a continuous operation with a connected load Ensure that the power is disconnected before installing, wiring, or servicing the unit. Do not attempt to install or use the unit until you read and understand the installation instructions and safety labels. Do not use the product if power cables are damaged The instructions and precautions set forth in this user manual are not necessarily all-inclusive or relevant to all applications as ACDC cannot anticipate all conceivable or unique situations. NOTE FOR INSTALLATION INTO A RACK ENCLOSURE: When installing the product into a rack enclosure the 2 rear supports must be removed. 1. Undo the 2 screws that hold the rear support onto the chassis (do this with both supports). 2. Position the unit into the rack enclosure and secure in place using the recommended fixings for the rack enclosure (not supplied). 3. Replace the rear supports from the side of the rack enclosure, ensuring the rack fixing point on the support is in the correct position to secure to the rear mounting point on the rack enclosure using the rack enclosure fixings (not supplied). 4. Replace the fixing screws that secure the support bracket to the chassis. 4 of 19
2.1 Unit Connection Below is an image showing the connections on the rear of the unit. Mains Input DMX IN DMX OUT ZONE 1 Output 1 to 4 ZONE 2 Output 5 to 8 MAINS INPUT The product can be connected to 110V ~ 240V mains supplies. DMX-512A The DMX-512A is connected via 5pin XLR connectors, configuration as below: Pin DMX IN DMX OUT 1 Ground Cable Shield Ground Cable Shield 2 Negative (-) Negative (-) 3 Positive (+) Positive (+) 4 Not Connected Not Connected 5 Not Connected Not Connected PLEASE NOTE: Before connecting any DMX controller, refer to the installation guide of the DMX controller manufacturer. OUTPUTS The fixtures are connected using 8 pin connectors, 1 per output (supplied). Pin 1 Pin 8 5 of 19
The outputs on the rear of the ACDC1999 are as follows: ZONE 1 ZONE 2 Pin LED OUTPUT1 LED OUTPUT2 LED OUTPUT3 LED OUTPUT4 LED OUTPUT5 LED OUTPUT6 LED OUTPUT7 LED OUTPUT8 Polarity Desc. Polarity Desc Polarity Desc Polarity Desc Polarity Desc Polarity Desc Polarity Desc Polarity Desc 1 + CH1 + CH4 + CH7 + CH10 + CH13 + CH16 + CH19 + CH22 2 - CH1 - CH4 - CH7 - CH10 - CH13 - CH16 - CH19 - CH22 3 + CH2 + CH5 + CH8 + CH11 + CH14 + CH17 + CH20 + CH23 4 - CH2 - CH5 - CH8 - CH11 - CH14 - CH17 - CH20 - CH23 5 + CH3 + CH6 + CH9 + CH12 + CH15 + CH18 + CH21 + CH24 6 - CH3 - CH6 - CH9 - CH12 - CH15 - CH18 - CH21 - CH24 7 Thermal Thermal Thermal Thermal Thermal Thermal Thermal Thermal NTC NTC NTC NTC NTC NTC NTC 8 Feedback Feedback Feedback Feedback Feedback Feedback Feedback Feedback NTC The ACDC1999 driver features the TP Fixed Thermal Protection which protects the LED fixture from overheating while maintaining light output. For more information about thermal protection, please see the TP Fixture Thermal Protection section. PLEASE NOTE: If the NTC sensor is not connected, TP protection will be disables for that output. Wiring diagram per zone for 4 x 3 channel fixtures: Wiring diagram per zone for 3 x 4 channel fixtures: 1 2 3 4 DC Output Cable Thermistor 6 of 19
2.2 Cable type / length limitations for different LED loads Please refer to cable type / length limitations tables below for selecting the correct cable type. At driving current 350mA At driving current 700mA All max. LEDs values are per channel Green colour means that full load can be used at the specified cable type / length. Yellow colour means that only a limited amount of load may be used at the specified cable type / length as stated in the relevant row / column. Red colour means that the specified cable type / length cannot be used. 7 of 19
Chapter 3: Unit Setup and Operation 3.1 Unit Power-Up Sequence After applying power to the unit, it will perform a quick self test for correct output LED wiring and a proper voltage from the DC power supply. Each of these tests is followed by corresponding messages on the LCD screen. LED Wirings Test The product has a unique, algorithm for detecting load type and wrong LED connections. It can detect if the LED s (+) and (-) lines are having a short circuit between them or mixed connection with a neighbour channel inside the plug terminal. If the unit detects an incorrect wiring on one of the outputs, that group of channels will not be operational until the problem is fixed. If during normal operation some of the LEDs are reconnected, the LED wiring test will be initiated on the group which the disconnected channel belonged to. That way LEDs can be hot-plugged into system, however connecting/disconnecting LED while powered on is not recommended. It is always better to make all of the connections first and then turn the power on. Auto Load Detection Each channel of the ACDC1999 is capable of auto-detecting the LED load type connected to it and selecting the appropriate operating mode to control that load. Driver Thermal Protection The ACDC1999 has internal temperature sensor which allows it to monitor the temperature of the internal power circuitry. If by any reason external ambient temperature rises above the permitted limit, the unit will not allow the internal circuitry to overheat by reducing the output power. By doing so, it s avoiding driver malfunction caused by overheating, still driving the LEDs even at worst conditions and preserving the ACDC1999 unit s lifetime. 8 of 19
3.2 ACDC1999 LCD Control Panel Power Indicator Back / Cancel Scroll Up DMX Indicator Error Indicator Enter / Accept Scroll Down Power Indicator Lights up to show the power is on. If LED flashes the driver is compensating for the power as the selected output power by the user is too great. DMX Indicator Lights up to show the unit is receiving DMX signal Error Indicator This light will flash to indicate there is a problem with the setup and one of the output channels is not setup correctly. If no fixture is connected to an output, ensure the settings are changed for this output to UNUSED (Refer to DMX Setup) Back / Cancel Use this button to go back one level in the menu or to move back and cancel the changes you are about to make. Enter / Accept This will take you through to the next menu/options available. When in a menu showing the value of the settings, pressing this button again will allow you to change the settings. Scroll Up / Down The scroll Up and Down buttons can be used to move up and down through menus and also to move up and down to change settings. 9 of 19
3.3 Menu Map MAIN MENU SUB MENU 1 SUB MENU 2 SUB MENU 3 SUB MENU 4 MODE Settings ADDRESS Settings LOST MODE Settings MASTER OFFSET Settings OP1 DMX MODE Settings OP2 DMX MODE Settings OP3 DMX MODE Settings CHANNEL MODES OP4 DMX MODE Settings OP5 DMX MODE Settings OP6 DMX MODE Settings DMX SETUP OP7 DMX MODE Settings OP8 DMX MODE Settings OP1 R OFFSET Settings OP1 OFFSETS OP1 G OFFSET Settings OP1 B OFFSET Settings OP2 OFFSETS (See OP1 OFFSETS) Settings DMX OFFSETS OP3 OFFSETS (See OP1 OFFSETS) Settings OP4 OFFSETS (See OP1 OFFSETS) Settings OP5 OFFSETS (See OP1 OFFSETS) Settings OP6 OFFSETS (See OP1 OFFSETS) Settings OP7 OFFSETS (See OP1 OFFSETS) Settings OP8 OFFSETS (See OP1 OFFSETS) Settings EFFECT SETUP EFFECT Settings (Effect Settings) Settings OP1 R MAX CURR Settings OP1 G MAX CURR Settings OP1 B MAX CURR Settings OP1 FIXTURE OP1 THERMACDCOR Settings OP1 DERATE MIN Settings OP1 DERATE MAX Settings OP1 RESPONSE Settings OP2 FIXTURE (See OP1 FIXTURE) Settings OP3 FIXTURE (See OP1 FIXTURE) Settings OP4 FIXTURE (See OP1 FIXTURE) Settings FIXTURE SETUP PASSWORD OP5 FIXTURE (See OP1 FIXTURE) Settings OP6 FIXTURE (See OP1 FIXTURE) Settings OP7 FIXTURE (See OP1 FIXTURE) Settings OP8 FIXTURE (See OP1 FIXTURE) Settings STANDY TIME Settings ALL R MAX CURR Settings ALL G MAX CURR Settings ALL B MAX CURR Settings ALL FIXTURES ALL THERMACDCOR Settings ALL DERATE MIN Settings ALL DERATE MAX Settings ALL RESPONSE Settings 10 of 19
Menu Map (cont d) MAIN MENU SUB MENU 1 SUB MENU 2 SUB MENU 3 SUB MENU 4 LED SUPPLY 1 Review observations LED SUPPLY 2 Review observations OP1 LED STATUS Review observations - Use scroll buttons OP2 LED STATUS Review observations - Use scroll buttons OP3 LED STATUS Review observations - Use scroll buttons LED STATUS OP4 LED STATUS Review observations - Use scroll buttons OP5 LED STATUS Review observations - Use scroll buttons OP6 LED STATUS Review observations - Use scroll buttons OBSERVE OP7 LED STATUS Review observations - Use scroll buttons OP8 LED STATUS Review observations - Use scroll buttons LED TEMPS Review observations - Use scroll buttons DRIVER TEMP Review observations DMX VALUES Review observations - Use scroll buttons ON TIME Review observations ON/OFF Review observations SOFTWARE VERSION Review observations EVENT LOG Review observations LCD Contrast Settings 3.4 Menu Options and Descriptions DMX SETUP Mode This sets the DMX mode for the driver. The options are: Standalone Will operate as a standalone unit Master The ACDC1999 will act as a Master DMX controller and will pass the signal to any slave units set to receiver, therefore any other units will produce the Receiver same sequence as the master The unit will operate from instructions received from a ACDC1999 acting as a Master Controller or instructions received from a DMX controller. Address Use this option to set the DMX address of the ACDC1999 Lost Mode This tells the ACDC1999 what to do if the DMX signal is lost. The settings are a follows: OFF All fixtures will be powered off if DMX signal is lost ON All fixtures will maintain the last instruction received 1-60 This is the number of seconds the ACDC1999 will maintain the last instruction before turning off all fixtures Master Offset This is the offset to be used for the DMX channels. Default is set to X which will then revert to the DMX Offsets 11 of 19
Channel Modes This area allows you to select each Output (1 to 8) and then tell the ACDC1999 how the output is controlled. The options are: External Controlled via the DMX signal Internal Unused Controlled using the internal Effects Setup Set to this option if no fixture is connected to the output to avoid an error showing DMX Offsets Here you can select each output (1 to 8) and tell the ACDC1999 what offsets to use on each channel. Default is 24 channel DMX so the settings are: Output 1 R Offset = 0 G Offset = 1 B Offset = 2 Output 2 R Offset = 3 G Offset = 4 B Offset = 5 Etc. If you wanted the ACDC1999 to respond to a 3 channel DMX controller, all outputs would be set as R = 0, G = 1, B = 2 If you wanted to set the DMX address and run all the channels on the same instruction, all of the above (all channels) would be set to offset = 0. This would mean all the channels on the ACDC1999 would respond to instructions from the first channel on the DMX controller assigned to the ACDC1999. EFFECT SETUP Effect This area allows you to set the internal program/sequence to be used. The options available are Static, Random, Step, Cyclic and X-Fade. Settings Any further options below the effect will change dependant upon which effect has been selected. The various options that will be available will colour, type and length/time. All of these settings will change the routine of the effect selected. FIXTURE SETUP The fixture setup area is password protected to stop anyone changing the current settings, etc. The default password is 1 2 3 4. To enter this use the scroll buttons to move up and down to select the number, then press the Enter/Accept button to move to the next number. The fixture setup can be set by each individual output (1-8) or can be set by using the ALL FIXTURES option in the menu. By using either option, you can change the following: Red maximum current (Channel 1) Green maximum current (Channel 2) Blue maximum current (Channel 3) Thermistor settings Derate minimum Derate maximum Response You can also set the standby time. 12 of 19
See the section Example scenarios for Current Setup OBSERVE The observe menu lets you check the status on several areas of the ACDC1999. By scrolling down the menu and entering into a submenu, you will see the current operating parameters. Areas for observation are LED supply 1, LED supply 2, LED status for Output 1 to 8, LED temperatures, Driver temperature, DMX values, On time, On/Off count, Software version and event log. LCD CONTRAST This will allow you to adjust the LCD contrast to make it more visible from the viewing when changing settings. 13 of 19
3.5 Example scenarios for Current setup The scenarios listed below are based on one zone in the ACDC1999 (Output 1 to 4 or/and Output 5 to 8) Scenario 1: 4 RGB Linear strips 1200mm long each containing 12 LEDs per channel, assuming average 3.2V per LED EFFECT = STATIC, FIXTURES MAX CURRENT = 500mA per channel Output 1 Output 2 Output 3 Output 4 Channel No 1 2 3 4 5 6 7 8 9 10 11 12 Current (ma) 500 500 500 500 500 500 500 500 500 500 500 500 TOTAL Voltage 38.4 38.4 38.4 38.4 38.4 38.4 38.4 38.4 38.4 38.4 38.4 38.4 WATTS Watts 19.2 19.2 19.2 19.2 19.2 19.2 19.2 19.2 19.2 19.2 19.2 19.2 230.4 Scenario 2: 4 RGB Linear strips 1200mm long each containing 12 LEDs per channel, assuming average 3.2V per LED EFFECT = STATIC FIXTURES MAX CURRENT = 700mA per channel Output 1 Output 2 Output 3 Output 4 Channel No 1 2 3 4 5 6 7 8 9 10 11 12 Current (ma) 700 700 700 700 700 700 700 700 700 700 700 700 TOTAL Voltage 38.4 38.4 38.4 38.4 38.4 38.4 38.4 38.4 38.4 38.4 38.4 38.4 WATTS Watts 26.9 26.9 26.9 26.9 26.9 26.9 26.9 26.9 26.9 26.9 26.9 26.9 322.8 Scenario 3: 4 RGB Linear strips 1200mm long each containing 12 LEDs per channel, assuming approx 3.2V per LED EFFECT = CYCLIC FIXTURES MAX CURRENT = 1000mA per channel As the driver is running in cyclic mode the output per 3 channels is never more than 50% of the total load, the example below has had the ma adjusted for calculations only as follows: 3 channels x 1A = 3A @ 50% = 1.5A = 500mA per channel Output 1 Output 2 Output 3 Output 4 Channel No 1 2 3 4 5 6 7 8 9 10 11 12 Current (ma) 500 500 500 500 500 500 500 500 500 500 500 500 TOTAL Voltage 38.4 38.4 38.4 38.4 38.4 38.4 38.4 38.4 38.4 38.4 38.4 38.4 WATTS Watts 19.2 19.2 19.2 19.2 19.2 19.2 19.2 19.2 19.2 19.2 19.2 19.2 230.4 14 of 19
Scenario 4: 4 RGB Linear strips 1200mm long each containing 12 LEDs per channel, assuming average 3.2V per LED EFFECT = STATIC FIXTURES MAX CURRENT = 2 fixtures @ 500mA/channel, 1 fixture @ 700mA/channel, 1 fixture @ 1000mA/channel Output 1 Output 2 Output 3 Output 4 Channel No 1 2 3 4 5 6 7 8 9 10 11 12 Current (ma) 500 500 500 500 500 500 700 700 700 1000 1000 1000 TOTAL Voltage 38.4 38.4 38.4 38.4 38.4 38.4 38.4 38.4 38.4 38.4 38.4 38.4 WATTS Watts 19.2 19.2 19.2 19.2 19.2 19.2 26.9 26.9 26.9 38.4 38.4 38.4 311.1 3.6 RDM Functionality (From software version 1.28 onwards) Remote Device Management (RDM) is an ANSI Standard and protocol enhancement to USITT DMX512A that allows bi-directional communication between a lighting or system controller and attached RDM compliant devices over a standard DMX line. This protocol will allow configuration, status monitoring, and management of these devices in such a way that does not disturb the normal operation of standard DMX devices that do not recognize the RDM protocol. RDM data packets of information are inserted in-between the existing DMX data packets being used to control the lighting data. The DMX 512 specification always requires that DMX packets begin with the start code. The default Start Code is 0x00 (also known as the Null Start Code). By using the start code 0xCC, RDM packets can be safely inserted between DMX data packets without older non-rdm aware devices attempting to read them The RDM standard ensures that in all cases (except discovery) only one device is authorized to be transmitting at any given time. Only the controller (of which there can be only one) can start an RDM exchange. Responders can speak only if spoken to. The controller will always initiate all RDM communication. The RDM protocol is changing the way lighting systems are installed and commissioned as it can provide: Addressing of devices controllable by DMX512A RDM devices can be automatically "discovered" by the controller, allowing an automated "equipment check" to be performed. Parameters which are set using "DIP switches" or a display on the drivers, such as DMX512 starting slot (address), personality, etc., can now be set directly from the console or RDM controller. Status and Error messages from RDM devices can be reported back to the controller, alerting the user to a potential problem. An RDM controller could display lamp status and lamp hours of all of the moving lights in a rig. Devices, such as LED lights, can be manufactured without DIP switches or controls of any type and be installed in inaccessible locations because, by using RDM, the DMX512 slot (address) can be set or changed at any time through an RDM controller. 15 of 19
RDM Functions The ACDC1999 driver supports ANSI E1.20 2006 RDM and is implemented as a ROOT device and 24 sub-devices, 1 for each LED Channel. The ACDC1999 also includes full RDM device discovery enabling all RDM devices to be detected on a system. ROOT Device Implemented Functions The ROOT Device Implementation supports the following functions: DEVICE_INFO IDENTIFY_DEVICE o This function flashes the backlight of the LCD display. DMX_START_ADDRESS SOFTWARE_VERSION_LABEL o This function will show what the current software version is running on the driver SUPPORTED_PARAMETERS PARAMETER_DESCRIPTION o DEVICE_LABEL This function Gets/Sets the label used as screen-saver on LCD display. o MANUFACTURER_LABEL o DEVICE_HOURS This function shows how many hours the driver has worked o DEVICE_POWER_CYCLES This function shows how many times the driver has switched on and off o SENSOR_DEFINITION 1 Motherboard temperature sensor 2 Power Supply 1 Output Voltage 3 Power Supply 2 Output Voltage SENSOR_VALUE FACTORY_DEFAULTS o This function sets the driver device to factory default values. DMX_PERSONALITY 1) Every channel has its own offset, 0-23 2) Every channel has the same offset, 0 3) Custom, Offsets have been altered using the drivers LCD menu. 4) 3 DMX channels used, offsets = 0, 1, 2, 0, 1, 2, 0, 1, 2,... 5) 4 DMX channels used, offsets = 0, 1, 2, 3, 0, 1, 2, 3,... Sub-Device Implemented Functions (24 Channels) The 24 Sub-Device Implementation supports the following functions: DEVICE_INFO IDENTIFY_DEVICE o Similar to ROOT device as it flashes the LCD display backlight. DMX_START_ADDRESS SOFTWARE_VERSION_LABEL o This function will show what the current software version is running on the driver 16 of 19
SUPPORTED_PARAMETERS PARAMETER_DESCRIPTION o SENSOR_DEFINITION 1) LED Output Current 2) LED Output Voltage SENSOR_VALUE Further RDM commands can be implemented in the ACDC1999 upon request. 3.7 LED Driver Thermal Protection The ACDC1999 driver operates world leading thermal protection to ensure that the 24 channel LED driver will not fail prematurely due to high operating ambient temperatures in excess of standard operating conditions. The following are the different methods employed by the ACDC1999 for driver protection enabling the system to operate safely within harsh operating environments: Motherboard Thermistor The ACDC1999 utilises a thermistor located on the motherboard of the driver system which measures the ambient temperature within the driver chassis. The thermistor is measured continuously and its values can be accessed from the Observe menu on the front LCD panel and also via RDM (from version 1.28 onwards). The ACDC1999 driver will use the thermistor temperature sensor to provide a power safe mode to limit the maximum amount of LED output power on a sliding scale according to the temperature derating curve of the main PSU s as shown in Chapter 4 and begins to derate at an ambient temperature of 50C and switches off at 70C ambient temperature internally. PSU Forced Air Cooling Sensors The two PSU s used within the ACDC1999 operate forced air cooling fans which will switch on and start to cool the system by pulling cool air from the front of the unit and push warmer air out of the back of the unit when the LED load on each PSU reaches 35% +/- 15% or when the additional built-in thermistor on each fan reaches 50 C. The Forced air cooling acts as the second independent thermal control protecting the ACDC1999 driver. Output Stage Digital Temperature Sensors A third independent thermal control system monitors the temperature of 6 high precision digital temperature sensors, one built into each of the DSP output stages. The digital sensors measure the actual temperatures of the electronics across the driver and are representative of the temperature of the electronics. If the temperature of any one of the electronics boards reaches 80% of the rated temperature the electronics system will shut down the individual DSP controlling that particular set of 4 output channels. The DSP electronics are rated to 125 C so the shutdown temperature will be ~100 C. This ensures that most of the electronic circuits will be switched off before failure can occur. The resolution of the DSP digital temperature sensor is 0.18 C. PSU Thermal Protection Shutdown The ACDC1999 PSU s include independent overprotection circuitry as follows: 1) 90 C +/-5 C (TSW1: detect on heatsink of power transistor within each PSU) 2) 95 C +/- 5 C for 48Vdc output (TSW2: detect on heatsink of power diode within each PSU) 17 of 19
3) When over temperature occurs in within either PSU the ACDC1999 will shut down the output voltages and recover automatically after the temperature reduces back to normal operating ranges. It is important to note that at 70 C the 48Vdc LED outputs will be shut down due to the output derating of the PSU s. 3.8 LED Fixture Thermal Protection The ACDC1999 enables up to 8 input ports for thermal feedback protection from the connected LED fixture s temperature providing the LED fixture contains a thermistor. If the ambient temperature or incorrect fixture settings are applied to the LED fixture which causes the fixture to overheat (maximum set by Thermistor Settings in Fixture setup), the LED fixture Thermal Protection will reduce the level of the LED current (or power) through the fixture until the fixture s temperature is stabilized within the allowed limitations. If after that the ambient temperature reduces, the LED fixture Thermal Protection feature will automatically raise the level of LED current (or power) passing through the fixture. The changes in the amplitude of the LED current will not affect the colour of the LED Light fixture; it will only affect the intensity of the light from the LED fixture. It should be noted that the intensity of the light closely depends on the LED junction temperature. For example, if the LED driven at 700mA current reaches high temperature, its light output may degrade by up to 70% depending upon which LED manufacturer is used within in the LED fixture. In most cases, lowering the current through an LED, will in fact obtain the same light intensity while the temperature of the LED will be able to stabilize. The LED Fixture Thermal Protection mode enables the LED system to automatically adapt itself to the ambient temperature around the LED fixture enabling the LEDs to operate within manufacturer s tolerances increasing life of the LED fixture and preventing premature failures. The ACDC1999 has been calibrated using the following NTC sensors: Thermistor 1: EPCOS B57621C103J62 Thermistor 2: MURATA - NCP18XH103J03RB Thermistor 3: AVX NB20K00103KBA Thermistor 4: AVX NB12K00103JBB PLEASE NOTE: If the NTC sensor is not connected to a particular LED fixture the Thermal Protection will be disabled for that particular LED Fixture output. The status of Thermal Protection can be viewed in the Observe menu (see Observe Menu in section 3.4). Thermal Dimmer value represents the percentage of the output current rating (in reference to the nominal current rating value set in Fixture Setup). For example, if the current rating is set to 700mA, then the normal current rating value is 700mA. If the Thermal Dimmer value is at 80% (as a result of Thermal Protection), then the maximal output current (at FL) shall be 80% of 700mA which is 700 x 80% = 560mA. 18 of 19
Chapter 4: Technical Data Description Specification INPUT Power Supply 110 ~ 240V AC Frequency Range 47 ~ 63 Hz Power Factor (Typ.) PF>0.95/230VAC PF>0.99/115VAC at full load AC Current (Typ.) 10A/115VAC 5A/230VAC Inrush Current +/-70A @ 115VAC -103.7A + 100.5A @ 230VAC Leakage Current <1.2mA / 240VAC Efficiency (Typ.) >85% at full load OUTPUT DC Voltage 48V Maximum Current 1A per channel, max 7A per zone* (14A total) Maximum Power 336W per zone* (672W total) Load Regulation +/- 0.5% Output Channels 12 channels per zone* (24 total) Fixture Output 4 outputs per zone* (8 total) ENVIRONMENT IP Rated IP20 dry location Working Temperature -30 ~ + 70 o C (Refer to output derating curve) Storage Temperature -40 ~ + 85 o C Working Humidity 20-90% RH non-condensing Storage Humidity 10-95% RH COMMS Communication Protocol Support DMX-512A, Auto-addressing, RDM ANSI E1.20 DMX Working Mode 24 channels Colour Grades 256 level (each colour) total 16,770,000 colours PROTECTION Fixture Protection Open circuit, Short Circuit, Wrong interconnection Output Protection Over voltage, Over temperature, Overload Thermal Protection (Unit) Reduces output current to eliminate unit overheating Thermal Protection (Fixture) Reduces light output to eliminate fixture overheating CONNECTIONS DMX Connection Type XLR 5 pin Power In Connection Type IEC Mains Inlet Output Connection Type 8 pin terminal block, pitch 3.5mm STANDARDS Approvals TBA Start Up Time Start-up time to 100% output 4.9 Seconds The ACDC1999 contains 2 zones; zone relates to either Outputs 1 to 4 or Outputs 5 to 8 19 of 19