PLM+ SERIES Powered Loudspeaker Management™ System PLM 20K44 PLM 12K44 Incorporating technologies from Operation Manual
1. Important safety instructions 1. Important safety instructions Before using the device, be sure to carefully read the Safety Instructions. Keep this document with the device at all times. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 2 Read these instructions. Keep these instructions Heed all warnings. Follow all instructions. Do not use this apparatus near water. Clean only with a dry cloth. Do not block any ventilation openings.
1. Important safety instructions To completely disconnect this equipment from the AC mains, disconnect the power supply cord plug from the AC receptacle. The mains plug of the power supply cord shall remain readily operable. Français: Pour démonter complètement l’équipement de l’alimentation générale, démonter le câble d’alimentation de son réceptacle. La prise d’alimentation restera aisément fonctionnelle. To reduce risk of fire or electric shock, do not expose this apparatus to rain or moisture.
Table of Contents Table of Contents 1. Important safety instructions 2 1.1. Approvals 2 1.2. Warnings 2 2. Introduction 6 2.1. Welcome 6 2.2. Main Features 6 2.3. Additional Documentation 8 3. Installation 8 3.1. Unpacking 8 3.2. Mounting 8 3.3. Cooling 10 3.4. Operating Voltage 10 3.5. Grounding 11 4. Product Overview 12 4.1. Front Panel Overview 12 4.2. Rear panel 14 5. Operation and performance 16 5.1. Operation precautions 16 5.2.
Table of Contents 7.5. Meter Button 31 7.6. Menu Button 31 7.7. Exit Button 31 7.8. Dynamic Buttons, Controls and LEDs 32 7.9. Warning and Fault Indications 37 7.10. Meter Mode 39 7.11. Menu Mode 43 8. Back Panel Interface 57 8.1. Speaker Outputs 57 8.2. Analog Inputs 60 8.3. AES3 Digital I/O 62 8.4. RJ45 etherCON Network Connections 62 8.5. Power Inlet 64 9. Appendix 65 9.1. Faults and Warnings Overview 65 9.2. Maintenance 68 9.3.
2. Introduction 2. Introduction 2.1. Welcome Thank you for choosing the Lab.gruppen PLM+ Series of Powered Loudspeaker Management systems for your sound reinforcement needs. We are confident that you will be pleased with the performance, unique features, configuration flexibility, reliability, and long-term durability offered by this product.
2. Introduction 2.2.2.2. ISVPL™ The Inter-Sample Voltage Peak Limiter (ISVPL) tailors each power output to the characteristics of the connected load. Please refer to section 5.3.1 for further information. 2.2.2.3. Load Verification & Performance Monitoring A comprehensive set of proprietary DSP-based tools are provided for load verification and real-time performance monitoring.
3. Installation 2.3. Additional Documentation This document, the PLM+ Operation Manual, serves as the primary reference source for detailed information on the installation and operation of PLM+ Series Powered Loudspeaker Management systems. It also provides detailed information on set-up and configuration using the front-panel interface.
3. Installation 3.2.1. Rear Mounting Two rear support brackets along with associated mounting hardware are included with the PLM+, as shown in Figure 3.1; it is recommended that these are used wherever possible. Fit the brackets to the vertical rails at the rear of the rack. Figure 3.2 and Figure 3.3 show the fitting options for fixed and removable installation.
3. Installation 3.3. Cooling 3.3.1. Overview The PLM+ Series devices use a forced-air cooling system with airflow from front to rear, allowing high continuous power levels without thermal problems. Front-to-rear airflow is preferable as air at the front of a rack is cooler than that at the rear in nearly all situations; never attempt to reverse the airflow.
3. Installation If the mains plug (AC plug) fitted to the mains cable (AC cord) is not appropriate for your country, it can be removed and a locally-sourced one fitted instead, observing the color coding in the table below: powerCON pin L Brown N Blue Green/Yellow Table 3.1: AC Plug Configuration If you are not 100% confident of your competence to replace the mains plug (AC plug), the task should be carried out by qualified personnel.
4. Product Overview 4. Product Overview 4.1. Front Panel Overview The front panel presents the following amplifier status indicators: 1 2 4 10 2 1 3 5 11 6 7 8 9 12 The front panel controls are clustered around a daylight readable LCD 3 , allowing adjustment and monitoring of the majority parameters and meters.
4. Product Overview Mute Enable – Select MUTE ENABLE to allow the dynamic function buttons to operate as mute controls for the Module inputs and power output channels. The MUTE ENABLE button flashes when the mode is selected; a subsequent press deselects this mode. If left activated, MUTE ENABLE mode will automatically disable two minutes after the last mute action.
4. Product Overview 4.2. Rear panel 1 3 INPUT 1 SPEAKER OUTPUTS INPUT 2 4 INPUT 3 INPUT 4 INPUT 1-2 5 INPUT 3-4 1Gbps PRIM ACT 6 1Gbps SEC LINK LINK PLM 12K44 100-240V 2400-2950W 50-60Hz CH 3 BRIDGE BRIDGE CH 1 ACT CH 2 CH 4 ANALOG WITH ISO-FLOAT TM PIN 1: SCRN 2: POS 3: NEG AES/EBU SWITCHED 100/1000 Base-TX Made in Sweden CLASS 3 WIRING Ser.
4. Product Overview Primary Network Connector – The primary Neutrik RJ45 etherCON® connection provides integration into an Ethernet control network which may include other Lake Processors and the Lake Controller software. Network connection permits full control of all functions along with real-time metering from a remote position. This device supports the Dante audio networking protocol, which allows transmission of multichannel, high-definition digital audio over the same Ethernet connection.
5. Operation and performance 5. Operation and performance This chapter provides comprehensive information on PLM+ Series connection, setup, operation and performance. The detailed information included here is essential to realizing the full functionality of the PLM+ Series devices. 5.1. Operation precautions Make sure that the Standby button on the PLM+’s front panel is either unlit (OFF), or red (STANDBY), before making any input or output connections.
5. Operation and performance 5.2.2. Rational Power Management™ Rational Power Management™ (RPM) is a unique Lab.gruppen feature that allows for flexible allocation of power across channels of a PLM+. Power that is not used by one output channel is free for use by another output channel with greater demands. RPM allocates power up to the total limits of the specific amplifier model. RPM exists in two modes. See the image below.
5. Operation and performance CAFÉ with ESP: CAFÉ (Configuring Amplifiers For the Environment) is a dedicated software application for Windows and OSX that provides tools for system planning, specification and commissioning. CAFÉ incorporates the Equipment Specification Predictor, a software module that examines SPL and speaker requirements for a project and generates requirements for output power on an amplifier and system level.
5. Operation and performance Table 5.3 shows the theoretical maximum output power for a given load impedance and ISVPL setting. Note: An ISVPL-to-load calculator that will assist in generating the appropriate ISVPL setting for a desired power load is available at www.labgruppen.com/plm. The ratings shown in the table below are limited by the CPL (Current Peak Limiter) functions, not by ISVPL settings, due to power output channel current capacity. Max.
5. Operation and performance This condition indicates an attempt to draw excessive current at the output. The output is attenuated until the output current falls below the maximum current rating. Limiting is performed by the ISVPL limiter in conjunction with the selected ISVPL profile. Please refer to the Technical Specifications in Section 11 for further details regarding ratings. Note: If excessive current is indicated, check the output cables and examine the loudspeaker.
5. Operation and performance 5.3.5. Under Voltage Limiter (UVL™) PLM+ devices are equipped with an under voltage limiter. With mulitple powerful devices on a mains distribution line, heavy current loads risk the reduction of voltage below that required for devices to function. The UVL reduces the mains current draw when voltage drop below 80 V. The amount of reduction applied increases as mains voltage drops towards 65 V, then at 65 V the power supply is shut down.
5. Operation and performance 5.3.8.2. Power Output Channels A power output channel temperature warning or fault is indicated in one of the front panels LEDs (in the right-hand soft function buttons). • A warning is indicated by a static yellow LED and adjacent warning message: TEMP WARN:CH • A fault is indicated with a static red LED and adjacent warning message: TEMP FLT:CH An event report is sent to the Lake Controller software for both the warning and the fault.
5. Operation and performance This protection system recognizes only continuous VHF signals at high levels that will not appear in speech or music. Any such content can therefore be considered as a fault condition. VHF protection is essential to avoid damage to HF drivers. VHF protection is dependent on a combination of output power level and frequency. Figure 5.
5. Operation and performance 5.3.11. Short Circuit Protection A low impedance or short circuit at the power output terminals is detected when the output current is high (Current Peak Limiter is active) and, simultaneously, the peak output voltage is below a predetermined threshold. When this situation occurs, the output stage is muted to protect it from damage.
6. Signal Flow and Lake® Processing 6. Signal Flow and Lake® Processing 6.1. Signal Flow The figures below depict the audio signal flow for a PLM+ Series device. It is worth noting that this sophisticated device provides seven points in the signal chain where the signal level can be adjusted, muted or disconnected. The blue sections represent Frame data, and the red sections represent Module data - please refer to the Lake Controller Operation Manual for further information.
6. Signal Flow and Lake® Processing 6.2.1. Power Output Section: Limiting and Sensitivity The Current Peak Limiter (CPL) dynamically limits the drive to the power stage based on three parameters: sensed output current level, feedback from the output stage, and sensed voltage clip from the ISVPL. This ensures that power output is maintained within the design limits of the PLM+.
6. Signal Flow and Lake® Processing Notes 6.4. Modules and Frames 6.4.1. Overview A Frame represents one physical Lake Processor device (e.g. PLM 12K44). A maximum of four Modules are contained within each Frame; these are referred to as Module A, B, C and D. The number of Modules shown in a given Frame is dependent upon the signal processing configuration of that Frame.
6. Signal Flow and Lake® Processing 6.6. Files and Presets The Lake system provides various methods for storing and recalling Module, Frame, or system-wide data. An overview is provided below; for further information please refer to the Lake Controller Operation Manual. 6.6.1. Module, System and Sub-System Configuration Files Module, System and Sub-System Configuration files are stored on the Lake Controller PC, and data is passed across the network when recalling or storing these type of files.
7. Front Panel Interface 7. Front Panel Interface An overview of the front panel interface is provided in section 4.1. This chapter describes each cluster of controls as shown in the diagram below. 1 2 4 10 2 1 3 5 11 6 7 8 9 12 7.1. Overview The front panel interface is framed by two sturdy cast aluminium handles 1 and metal grill protecting the air intake and dust filters 2 .
7. Front Panel Interface 7.1.3. Selecting a Module in the Lake Controller software via the Front Panel It is sometimes useful to identify which Module icon/s in the Lake Controller software are associated with a particular hardware Frame. To highlight the module in the Lake Controller software: 1. Ensure Meter Mode is selected and in Module view. 2. Press the button adjacent to the Module description on the left LCD. The corresponding module will show highlighted text on the Lake Controller screen.
7. Front Panel Interface 7.4. Mute Enable Button The dynamic function buttons to the immediate left and right of the LCD are used as MUTE buttons only when the MUTE ENABLE button 5 is activated (flashing). When MUTE ENABLE is activated the MUTE ENABLE button will flash and the four buttons on the left act as Module or Input Router mute controls (depending on active view) and the four buttons on the right enable muting/unmuting of the Amplifier Channel (power outputs).
7. Front Panel Interface 7.8. Dynamic Buttons, Controls and LEDs B A C D Figure 7.3: LCD with Dynamic Buttons, Controls and LEDs 7.8.1. Communication LED A This bright white LED signifies selection in the Lake Controller, or Controller communication providing visual confirmation of: 1. Network communication between the Lake Controller and the Lake Processor (Flashing LED). 2. Selection of the Lake Processor in the Lake Controller software (Steady LED).
7. Front Panel Interface 7.8.3. Rotary Encoder C The rotary encoder is used to adjust parameters in conjunction with the selection made via the dynamic function buttons and LCD menus. The ring around the rotary encoder illuminates when a selected parameter is available for adjustment. Turn the encoder clockwise to increase the selected parameter, or counter-clockwise to decrease the value. Parameters with only two states (e.g. ON, OFF) are toggled by turning clockwise or counter-clockwise.
7. Front Panel Interface 7.8.4.1. Mute Functions The PLM+ provides mute functions at several different points in its audio chain. Please refer to section 6.1 for further information. The four types of mute are: 1. 2. 3. 4.
7. Front Panel Interface Note: Fault condition LED indications take priority over mute status indications. If a fault condition occurs, the LED will indicate the fault by flashing and will note the mute status. When a Frame fault is active the audio on all channels is muted. Module Input Mutes may also be controlled in Menu Mode. Please refer to the Lake Controller User Manual for details of mute selection via the software. 7.8.4.4.
7. Front Panel Interface 7.8.5. LED Fault, Warning and Clip Indication B D A tricolor LED is embedded inside each of the eight dynamic function buttons. These convey a variety of status indications including faults and warnings, signal clip indications, Module input mute, Module output mute and Power Output mute. Table 7.4 summarizes the meaning of the LED indications. LED Color Indication Green Status Good / Unmuted Yellow Warning Red Fault / Muted Flashing Red Clip Table 7.
7. Front Panel Interface 7.8.5.2. Warning or Fault Indications If certain parameters within the PLM+ approach or exceed preset limits, a warning condition or fault condition may arise. One or more LEDs provide a visual indication of the problem, along with an on-screen description of the condition displayed adjacent to the LED/s.
7. Front Panel Interface Warning Type On Screen Warning Text Event Log Text Amp Ch Mute Channel 5-8 AMP CH.
7. Front Panel Interface 7.10. Meter Mode 7.10.1. Home View The default view when powering on the device is Meter Mode > Home View as shown in Figure 7.7. Figure 7.7: Meter Mode > Home View Home View provides a summary of Module I/O gain level and limiter gain reduction, along with frame, module and channel labeling information. The example in Figure 7.7 shows a mono 2-way, with Module A feeding power output channels 1 & 2, and Module B configured as CL1-way feeding a subwoofer on power output channel 3.
7. Front Panel Interface Note: Output limiter (gain reduction) meters take into account the sum of PLM+ ISVPL and Lake LimiterMax. 10 The icons in the center of the LCD indicate the amplifier channel to which each module output is routed. When two amplifier channels are Bridged, both channels will be displayed. The type of icon used in the center of the screen confirms whether the PLM+ outputs are configured in Standard mode or Bridge Mode, as shown in Figure 7.
7. Front Panel Interface 6 7 8 9 LoadPilot Status: 1. High Freq Pilot tone Enabled/Disabled, 2. Low Freq Pilot tone Enabled/Disabled, Status LoadPilot Status: 1. High Freq Pilot tone Enabled/Disabled, 2. Low Freq Pilot tone Enabled/Disabled, Status LoadPilot Status: 1. High Freq Pilot tone Enabled/Disabled, 2.
7. Front Panel Interface 7.10.4. Input Meters View Input View enables inspection of the source selected to each input router; input signal level before the input mixer (i.e. prior to the Home View Module input meters); Module Input Mixer Routing; as well as Input Connection status. Figure 7.
7. Front Panel Interface 5 6 7 8 9 Output 1: Output Label - Output Gain Meter - Lx: Sum of Lake MAX-Peak and MAX-RMS gain reduction Output 2: Output Label - Output Gain Meter - Lx: Sum of Lake MAX-Peak and MAX-RMS gain reduction Output 3: Output Label - Output Gain Meter - Lx: Sum of Lake MAX-Peak and MAX-RMS gain reduction Output 4: Output Label - Output Gain Meter - Lx: Sum of Lake MAX-Peak and MAX-RMS gain reduction Current View title & Frame label, Frame faults and warnings 7.11. Menu Mode 7.11.1.
7. Front Panel Interface 7.11.1.1. Parameters with Individual Values and Group Totals The following parameters display two values: • • • • MODULE MODULE MODULE MODULE > > > > GAIN DELAY LIMITERS > MAXRMS LEVEL LIMITERS > MAXPEAK LEVEL The Module parameter can be adjusted using the rotary encoder. The Group total (shown in brackets) is only adjustable using the Groups function in the Lake Controller.
7. Front Panel Interface • LOAD MONITOR (See section 7.11.8) • Configure No. of Cabinets in Parallel • LoadSmart Verification • Estimated No. of Cabinets 7.11.2. Module Submenu Only module output channels for routed Power channels are displayed. This applies to all module output configurations described below. MENU > MODULE After selecting the Module Menu, the screen shown in Figure 7.14 is displayed. Press the illuminated button adjacent to the required option to view or edit the associated parameters.
7. Front Panel Interface 7.11.2.2. Gain MENU > MODULE > GAIN Figure 7.16: Module Gain Edit Screen Press the illuminated button next to the module input/s and/or output/s for adjustment, and use the rotary encoder to change the value(s). Multiple gain values may be adjusted simultaneously in 0.1 dB increments, subject to defined level limits. 7.11.2.
7. Front Panel Interface 7.11.2.5. Amp Gain MENU > MODULE > AMP GAIN By default, all outputs are selected; use the rotary encoder to change the gain of all power outputs or press the associated output button to deselect one or more outputs. Amp Gain adjusts the gain of the PLM+’s power output stage for each output channel. The default setting is 35 dB, variable in 0.1 dB increments from 22 dB to 44 dB.
7. Front Panel Interface MaxRMS Level (MaxRMSLvl) This sets the maximum RMS signal level at the Module outputs. It is adjustable from -30 dBu to +30 dBu in 0.1 dB increments, subject to user-defined level limits. The Group total is displayed (in brackets) for each channel. MaxRMS Corner (MaxRMSCor) A soft-knee or hard-knee corner may be applied to the RMS Limiter.
7. Front Panel Interface 7.11.3. I/O Configuration MENU > I/O CONFIG Figure 7.17: I/O Configuration Sub Menu This menu provides configuration options for input routing, along with settings for AES Termination and Iso-Float as described in the following sections. 7.11.3.1. Input Router Configuration MENU > I/O CONFIG > ROUTER Figure 7.18: Input Router 1 The signal flow diagrams in chapter 6 highlight that there are four Input Routers available on PLM+ Series devices.
7. Front Panel Interface With a router selected on the front panel, press the middle button on the left of the LCD to activate this parameter for editing. Use the illuminated rotary encoder to scroll through the following options: • • • • • Auto Select (default) Force Priority 1 Force Priority 2 Force Priority 3 Force Priority 4 Assignment of Input Priority Factory default settings assign Dante 1-4 to Priority 1, Dante 5-8 to Priority 2, AES3 1-4 to Priority 3 and Analog 1-4 to Priority 4.
7. Front Panel Interface The PLM+ device at the end of a distribution line should be set to TERMINATED; all other PLM+ devices should be set to UNTERMINATED. If an AES3 distribution amplifier (DA) is being used to distribute the digital audio signals, with one DA output per processor, then all terminations should be on. However, if the AES3 is daisy-chained, only terminate the last PLM+ device in the chain. 7.11.3.3. Iso-Float MENU > I/O CONFIG > ISO-FLOAT Figure 7.
7. Front Panel Interface 1 2 3 4 5 6 7 8 9 Toggle the Source from which you want to route the channels (Module, Analog, AES) Toggle up among the available source channels Toggle down among the available source channels Unused Unused Toggle left among the available outputs Toggle right among the available outputs Disconnect all Dante assignments Turn Right to Route / Turn Left to Un-route Use the arrows visible on the display (2-3, 6-7) to toggle between available sources and outputs.
7. Front Panel Interface 7.11.5.1. Frame Info MENU > FRAME > FRAME INFO Frame Info provides information about the device settings and configuration. All data in this front panel menu is read-only; some parameters are fixed, and some can be changed only via the Lake Controller software. Firmware Version (FW Version) The firmware version numbers are displayed on left side of screen. This information can be used to verify that the latest firmware is installed and is useful if a technical issue arises.
7. Front Panel Interface 7.11.5.3. Breaker Emulation Limiter MENU > FRAME > BEL CONF The Breaker Emulation Limiter (BEL) provides Ampere selection (5-32 A) and breaker type selection (CONSERVATIVE, FAST and UNIVERSAL). Select by pressing the adjacent button then use the rotary encoder to change the parameter. The maximum RMS input current varies between the 12K44 and 20K44; therefore, a desired value is configured and the actual value is displayed within brackets. 7.11.5.4.
7. Front Panel Interface 7.11.6. Front Panel Display Controls MENU > FRAME > FRONT Contrast To adjust the front panel LCD contrast, select this option then use the rotary encoder to change the value. Dimming To adjust the front panel LCD & LED brightness, select this option then use the rotary encoder to change the value.
7. Front Panel Interface 7.11.8.1. Configure # of Cabinets in Parallel This option allows selection of the number of speaker cabinets connected to each PLM+ output channel. Select individual or multiple outputs and use the rotary encoder to set the value from 1 to 4. This value is used by LoadSmart to confirm the correct connection and status of the speakers connected to each PLM+ channel. 7.11.8.2. LoadSmart Verification Select this option to initiate LoadSmart verification, then select YES to continue.
8. Back Panel Interface 8. Back Panel Interface An overview of the back panel interface is provided in section 4.2. This chapter describes each cluster of connections as shown in Figure 8.1.
8. Back Panel Interface 8.1.2. speakON Connectors 1 On both PLM+ models, the power outputs are simultaneously available on a single 8-pole speakON connector, and on two 4-pole speakON connectors. The two 4-pole connectors carry the outputs of channels 1 & 2 and 3 & 4 respectively. SPEAKER OUTPUTS CLASS 3 WIRING 1+/- CH 1+/2+/- CH 2+/1+:+ BRIDGE CH 1 & 2: 2- : - 1+/- CH 1+/2+/- CH 2+/- 1+/- CH 3+/2+/- CH 4+/BRIDGE CH 3 & 4: 1+ : +, 2- : - 3+/- CH 3+/4+/- CH 4+/- Figure 8.
8. Back Panel Interface 4+ 41+ 31- 3+ 22+ 1+ 2- 3+ 4- NL4 PLM+ Output Channels 1 & 2 NL8 PLM+ Output Channels 1 - 4 NL4 PLM+ Output Channels 3 & 4 Figure 8.5: speakON NL4/NL8 Configuration 8.1.3. Binding Post Connectors Binding post versions of the PLM+ are fitted with four pairs of black and red 4 mm binding posts. SPEAKER OUTPUTS CH 3 BRIDGE BRIDGE CH 1 CH 2 CH 4 CLASS 3 WIRING Figure 8.
8. Back Panel Interface Connect the ‘+’ loudspeaker terminals to the red binding posts and the ‘ – ‘ terminals to the black binding posts. There are three methods of connecting speaker cables to the binding posts. 1. Solder 4 mm banana-plugs to the ends of the speaker wires and plug into the center of the turrets. 2. Thread the stripped ends of the wires through the holes in the posts. Enter the wires for output channels 1 and 3 from above and for channels 2 and 4 from below.
8. Back Panel Interface 8.2.3. Unbalanced Operation Balanced connections are recommended where possible. However, if it is necessary to drive the device from equipment with an unbalanced output, wire the inputs as shown in Figure 8.10. 2 HOT HOT COLD COLD SCRN Unbalanced Output (Typically phono) 1 3 SCRN Balanced Input (XLR) Figure 8.10: Balanced to Unbalanced Analog Wiring and Pin Out The method shown in Figure 8.
8. Back Panel Interface 8.3. AES3 Digital I/O 8.3.1. AES3 XLR Connector 3 AES3 digital audio input is via two XLR3F connectors. Connectors are provided for Inputs 1 & 2 and Inputs 3 & 4. Wiring of this connector follows the same standard as for analog XLR connections as shown section 8.2.2. The AES3 signal format carries two channels of audio and associated data on a single cable/connector.
8. Back Panel Interface Pin No. Color 1 Brown 2 Brown + White 3 Green 4 Blue + White 5 Blue 6 Green + White 7 Orange 8 Orange + White Table 8.14: RJ45 Wiring & Pin Out Description Figure 8.15: RJ45 Wiring & Pin Out Diagram When the device is connected to an active network, the yellow LINK LED illuminates above the connector in use. Data activity on the network is indicated by illumination of the green ACT LED. It is normal for the ACT LED to flicker either sporadically or continuously.
8. Back Panel Interface 8.5. Power Inlet 8.5.1 Power Connector 7 A Neutrik NAC3 Series powerCON connector rated at 32 A is fitted to the rear of the PLM+ for AC mains input. The power cable (AC cord) supplied with the PLM+ has the mating connector ready-fitted, but may require a mains (AC) plug specific to your country to be fitted to the other end. The wiring an pinout details are shown in Table 8.2.
9. Appendix 9. Appendix 9.1.
9. Appendix Category/Type Name On screen text Description Action Increase mains distribution stiffness or reduce output power to avoid limiting PSU Warning Under Voltage Limit UVL ACTIVE The Under Voltage limiter is active as the mains supply is approaching the lower end of the device´s operational voltage.
9.
9. Appendix 9.2. Maintenance During normal operation this devices provides trouble-free service. If the LCD or front panel display requires cleaning, use a soft cloth only; do not use solvent cleaners. The dust filters on both sides of the front panel, behind the grilles, should occasionally be removed and cleaned to ensure maximum airflow through the device. Disconnect the unit from mains power prior to removing dust the filter, and ensure the dust filter is replace prior to turning the unit back on.
9. Appendix 9.3.2. Input and Router Defaults Autoselect: Input sensitivity: Dante: AES3: Iso-Float: On +26 dBu Disabled Terminated Enabled Router 1: Priority 1 = Dante Receiver (Ch.1) Priority 2 = Dante Receiver (Ch.5) Priority 3 = AES1 (Ch.1) Priority 4 = Analog 1 Router 2: Priority 1 = Dante Receiver (Ch.2) Priority 2 = Dante Receiver (Ch.6) Priority 3 = AES1 (Ch.2) Priority 4 = Analog 2 Router 3: Priority 1 = Dante Receiver (Ch.3) Priority 2 = Dante Receiver (Ch.7) Priority 3 = AES1 (Ch.
9. Appendix 9.4. Current Draw and Thermal Dissipation Specifications The tables in this section provide measured current consumption and calculated heat dissipation for five different operating conditions for each PLM+ Series device. 1. 2. 3. 4. 5.
9. Appendix PLM 20K44 Level Load Rated power per channel Line Current Power Factor (A) (%) Measured Power (W) In Out Thermal Dissipation Dissipated BTU/hr kCal/hr Mains Voltage 100 VAC, 30 A Standby 0.33 51.8 17 0 17 58.006 14.627 Power on, Idling 2.43 96.8 235 0 235 801.853 202.199 Pink Pseudo Noise Sine 20 kHz 16 Ω / Ch. 1175 12.1268 98.6 1191.6 587.596 604.004 2060.946 519.697 8 Ω / Ch. 2350 22.349 98.9 2197.714 1173.927 1023.788 3493.309 880.888 4 Ω / Ch.
9. Appendix 9.5. Glossary of Terms, Acronyms and Abbreviations The explanations given in Table 9.4 below are based on the specific use of each term in this manual. The definitions are not intended to be exhaustive and many of these terms have wider meanings. Term 72 Description Floating An analog balanced input or output is said to be floating when full electrical isolation exists between that input or output and the equipment connected to it.
9. Appendix Term Description Offline A device on an Ethernet network which is not communicating with the rest of the network either due to a fault or intentionally is said to be offline. Online A device on an Ethernet network which is fully operational and communicating with the rest of the network is said to be online. PAL An abbreviation for Power Average Limiter, PAL is proprietary Lab.gruppen circuit which provides additional amplifier protection.
10. Application Guide 10. Application Guide This chapter describes the practical application and use of PLM+ Series devices. 10.1. Rack I/O Panels For fast and simple system connection, pre-wired racks using connection panels can be used. With an I/O connector panel fitted to the front of the rack, all audio, loudspeaker, network and power cables can be plugged in at one position, without requiring rear panel access. 10.2.
10. Application Guide 10.2.2. Six PLM+ Series Devices with 100-120 V Mains Supply If the mains supply is 115 V and the system requirement is 6 PLM+s, then the mains capacity would need to be able to supply two 3 x 30 A circuits. There are two methods of achieving this: 1. Two racks, each with three 230 V version PLM+s and a 30 A three-phase mains supply. In the rack the PLM+s are connected between the phases, i.e. one between phase 1 and 2, one between phase 2 and 3 and the last between phase 3 and 1.
10. Application Guide 10.3.3. Module Input Gain Input Gain is used to adjust the level between different speaker cabinets in the system. This gain can remain at 0.00 dB unless a lower level is required for the cabinet/s driven by this Module. To adjust, navigate to MODULES > EQ/LEVELS > LEVELS in the Lake Controller. Please refer to the Lake Controller Operation Manual for further details. 10.3.4. Module Output Gain Factory and User Gain are provided for each Module output.
10. Application Guide 10.4. Gain / Level Optimization 10.4.1. Maximize Volume Capability To maximize the volume capability of the device, ensure there is sufficient headroom in the signal path to avoid clipping before the limiters engage. It must be possible to achieve enough gain through the device to engage the limiters and realize a high average SPL. As an optimal setting, allow for a headroom of 10 dB or more for all channels; the simplest way to accomplish this is to increase the Module input gain.
10. Application Guide Figure 10.3 illustrates how to achieve the lowest possible output noise, although this is not a recommended configuration. • • • • Input Clip: 0 dBFS Amp Gain: 22 dB SNR: 114.8 dB Absolute Noise Floor: -71.9 dBu 100,0 50,0 dB/dBu 0,0 Clip -50,0 Nominal -100,0 -150,0 Noise Analog AES Input Input Mixer Module In Module Out Amp Attenuation Analog Ref Amp Gain ISVPL Output -200,0 -250,0 Table 10.
10. Application Guide Figure 10.5 illustrates how to minimize absolute noise while achieving full power. In this illustration it can be seen that there is no available headroom. • • • • Input Clip: 12 dBu Amp Gain: 30.9 dB SNR: 111.3 dB Absolute Noise Floor: -68.4 dBu 80,0 60,0 40,0 dB/dBu 20,0 0,0 Clip -20,0 Nominal -40,0 Noise -60,0 -80,0 -100,0 -120,0 -140,0 Analog AES Input Input Mixer Module In Module Out Amp Attenuation Analog Ref Amp Gain ISVPL Output Table 10.
10. Application Guide 10.5. Speaker Configurations Connecting two speakers in parallel to a PLM+ power output presents a load to the amplifier which is half the impedance of that presented by one speaker. Therefore, the current that two speakers will attempt to draw from the output stage is double that for one speaker, and this higher current may be sufficient to cause the Current Peak Limiter to become active.
10. Application Guide The data format allows for auxiliary data which can be used for information on signal characteristics as well as the sampled audio data. The physical interconnection, as defined by IEC 60958 Type I, specifies three-conductor 110-ohm twisted pair cabling terminated by an XLR connector. Please refer to section 8.3 for wiring details. AES3 provides for multiple sampling rates and resolutions of up to 24 bits; this device accepts sample rates from 44.1 to 192 kHz. 10.6.2.
10. Application Guide 10.6.3.3. Cable Types and Distance Limitations All digital connections should be made with 100 ohm balanced cables wired according to the AES3 standard (see Section 8.2.2). Although standard analog microphone cabling may function in limited circumstances, the potential for problems is greatly increased. AES3 contains a high-speed data stream, and requires an effective bandwidth of up to 12 MHz, far beyond the 20 kHz required for analog audio.
10. Application Guide 10.6.5. Additional Reference Material Complete technical information on the AES/EBU (AES3) standard can be downloaded from the AES web site at http://www.aes.org/publications/standards/. 10.7. Digital Clock Configuration 10.7.1. Digital Clock Overview In order to provide a flexible and robust audio processing system, the device is equipped with a configurable digital clocking system.
10. Application Guide 10.7.2. Clock Source Priorities There are two options for clock source configuration: Manual Configuration or Automatic Detection. For Manual Configuration, the selected internal or external clock source remains fixed regardless of whether a compatible clock signal is preset. For Automatic Detection, the most appropriate clock matching the selected base-rate is automatically selected according to the following priorities. 1. AES1 (Input 1+2) 2.
11. Technical Specifications 11. Technical Specifications PLM 12K44 PLM 20K44 General Processing / Network Numbers of amplifier channels Total burst power all channels (share among channels with RPM) Lake / Dante 4 12000 W Lake / Dante 4 20000 W Max. Output Power (all ch.’s driven) 1) 2 ohms 2.67 ohms 4 ohms 8 ohms 16 ohms Hi-Z 70 V Hi-Z 100 V 3000 W 3000 W 3000 W 1900 W 950 W 3000 W 3000 W 4400 W 5000 W 4400 W 2300 W 1150 W 3300 W 4700 W Max output power single channel 1) 2 ohms 2.
11. Technical Specifications PLM 12K44 PLM 20K44 22 - 44 dB, step size 0.1 dB - Inf to 0 dB, step size 0.25 dB 22 - 44 dB, step size 0.1 dB - Inf to 0 dB, step size 0.
12. Warranty and Support 12. Warranty and Support 12.1. General This product is manufactured by Lab.gruppen, and it is warranted to be free from any defects caused by components or factory workmanship, under normal use and service, for a period of six (6) years from date of purchase from an authorized Lab.gruppen dealer. If the product fails to perform as specified during the warranty period, Lab.
12. Warranty and Support 12.3.2. Factory Service In the event a Lab.gruppen product requires factory service, you may contact Lab.gruppen’s service department for return instructions and a Return Authorization number. Please note for product return: 1. Use the original packing. 2. Include a copy of the sales receipt, your name, return address, phone and fax number, email address and description of the defect. 3. Mark the Return Authorization number on the outside of the packing. 4.
Notes Notes PLM+ SERIES Operation Manual rev 1.0.
Notes Notes 90 PLM+ SERIES Operation Manual rev 1.0.
Notes Notes PLM+ SERIES Operation Manual rev 1.0.
Intercooler, Class TD and Lake are national and/or international registered trademarks of Lab.gruppen AB. PLM+, Powered Loudspeaker Management, R.SMPS, LoadLibrary, LoadSmart, SpeakerSafe, ISVPL, BEL, UVL and CAL are trademarks of Lab.gruppen AB. Dolby is a registered trademark of Dolby Laboratories. Raised Cosine Equalization, LimiterMax and Iso-Float are trademarks of Dolby Laboratories. Audinate is a registered trademark of Audinate Pty Ltd. Dante and Zen are trademarks of Audinate Pty Ltd.
