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Plena Universal Pre-amplifier Installation and Operating Manual en LBB 1920 Plena Universal Pre-amplifier | Installation and Operating Manual | Important safeguards en | 3 Important safeguards 1 Read instructions - All the safety instructions for use should be read before the system is operated. 2 Retain instructions - The safety instructions and instructions for use should be retained for future reference. 3 Heed warnings - All warnings on the unit and in the operating instructions should be adhered to. 4 Follow instructions - All operating instructions and instructions for use should be followed. 5 Cleaning - Unplug system units from the mains outlet before cleaning. Do not use liquid cleaners or aerosol cleaners. Use a damp cloth for cleaning. 6 Attachments - Do not use attachments not recommended by the product manufacturer as they may cause hazards. 7 Water and Moisture - Do not use this unit near water, for example near a bathtub, washbowl, kitchen sink, or laundry basket, in a wet basement, near a swimming pool, in an unprotected outdoor installation or any area which is classified as a wet location. 8 Accessories - Do not place this unit on an unstable stand, tripod, bracket or mount. This unit may fall, causing serious injury to a person and serious damage to the unit. Use only a stand, tripod, bracket or mount recommended by the manufacturer, or sold with the product. Any mounting of the unit should follow the manufacturer's instructions, and should use a mounting accessory recommended by the manufacturer. An appliance and cart combination should be moved with care. Quick stops, excessive force, and uneven surfaces may cause the appliance and cart combination to overturn. 9 Ventilation - Openings in the enclosure, if any, are provided for ventilation and to ensure reliable operation of the unit and to protect it from overheating. These openings must not be blocked or covered. The unit should not be placed in a built-in installation unless proper ventilation is provided or the manufacturer's instructions have been adhered to. 10 Power sources - Units should be operated only from the type of power source indicated on the marking label. If you are not sure of the type of power supply you plan to use, consult your appliance dealer or local power company. For units intended to operate from battery power, or other sources, refer to the "Installation and User Instructions". 11 Grounding or polarisation - This unit may be equipped with a polarised alternating current line plug (a plug having one blade wider than the other). This plug will fit into the power outlet only one way. This is a safety feature. If you are unable to insert the plug fully into the outlet, try reversing the plug. If the plug still fails to fit, contact your electrician to replace your obsolete outlet. Do not defeat the safety purpose of the polarised plug. Alternatively, this unit may be equipped with a 3-wire grounding type plug having a third (grounding) pin. This plug will only fit into a grounding-type power outlet. This is a safety feature. If you are unable to insert the plug into the outlet, contact your electrician to replace your obsolete outlet. Do not defeat the safety purpose of the grounding-type lug. Bosch Security Systems | 2003-09 | 3922 988 99482en 12 Power-Cord Protection - Power supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords and plugs, convenience receptacles, and the point where they exit from the appliance. 13 Overloading - Do not overload outlets and extension cords as this can result in a risk of fire or electrical shock. 14 Object and Liquid Entry - Never push objects of any kind into this unit through openings as they may touch dangerous voltage points or short-out parts that could result in a fire or electric shock. Never spill liquid of any kind on the unit. 15 Servicing - Do not attempt to service this unit yourself as opening or removing covers may expose to dangerous voltage or other hazards. Refer all servicing to qualified service personnel. 16 Damage Requiring Service - Unplug the unit from the outlet and refer servicing to qualified service personnel under the following conditions: • When the power-supply cord or plug is damaged. • If liquid has been spilled, or objects have fallen into the unit. • If the unit has been exposed to rain or water. • If the unit does not operate normally by following the instructions for use. Adjust only those controls that are covered by the instructions for use, as an improper adjustment of other controls may result in damage and will often require extensive work by a qualified technician to restore the units to their normal operation. • If the unit has been dropped or the unit has been damaged. • When the unit exhibits a distinct change in performance; this indicates a need for service. 17 Replacement Parts - When replacement parts are required be sure the service technician has used replacement parts specified by the manufacturer or parts which have the same characteristics as the original part. Unauthorised substitutions may result in fire, electric shock or other hazards. 18 Safety Check - Upon completion of any service or repairs to the units, ask the service technician to perform safety checks to determine that the unit is in proper operating condition. 19 Lightning - For added protection of the units during a lightning storm, or when it is left unattended and unused for long periods of time, unplug it from the wall outlet and disconnect the cable system. This will prevent damage to the unit due to lightning and power-line surges. Plena Universal Pre-amplifier | Installation and Operating Manual | About this manual en | 4 About this manual This manual provides all the information required to install and operate the unit. Conventions Warning Follow these instructions to prevent personal injury. Caution Follow these instructions to prevent damage to the equipment. Note Read these instructions for tips and other useful information. Safety precautions Warning Do not open the unit when it is connected to the mains. The unit contains non-insulated parts, which can cause electric shock. Caution There are no user-serviceable parts inside the unit. Service must be done by qualified personnel. Bosch Security Systems | 2003-09 | 3922 988 99482en Plena Universal Pre-amplifier | Installation and Operating Manual | Table of contents en | 5 Table of contents Important safeguards..........................................................................................................................................................3 About this manual ..............................................................................................................................................................4 Safety precautions...............................................................................................................................................................4 Table of contents ................................................................................................................................................................5 1 About the equipment ........................................................................................................................................................7 1.1 Controls and connections (front) .............................................................................................................................8 1.2 Controls and connections (rear) ..............................................................................................................................8 2 Internal settings ..................................................................................................................................................................9 2.1 Priority mode setting ................................................................................................................................................9 2.2 Channel settings ........................................................................................................................................................9 2.2.1 Microphone or Line input ..................................................................................................................................9 2.2.2 Mic/Aux input selection .....................................................................................................................................9 2.2.3 Speech filter on/off ..............................................................................................................................................9 2.3 Setting emergency, insertion or cascade ..............................................................................................................10 3 Installation in rack ...........................................................................................................................................................11 4 External settings and connections .................................................................................................................................12 4.1 Connect the DC supply (battery) ..........................................................................................................................12 4.2 Connect a microphone or line-level source .........................................................................................................13 4.3 Insertion or Cascade connection ...........................................................................................................................14 4.4 Connect a Booster amplifier or System pre-amplifier ........................................................................................14 4.5 Connect an emergency input line .........................................................................................................................15 5 Operation .........................................................................................................................................................................16 5.1 Set Line input volume, treble and bass ................................................................................................................16 5.2 Line monitoring ......................................................................................................................................................16 6 Technical data ..................................................................................................................................................................17 6.1 Electrical ..................................................................................................................................................................17 6.2 Performance ............................................................................................................................................................17 6.3 Inputs ........................................................................................................................................................................17 6.4 Outputs .....................................................................................................................................................................18 6.5 Interconnection .......................................................................................................................................................18 6.6 Relays .......................................................................................................................................................................18 6.7 Environmental conditions ......................................................................................................................................18 6.8 General .....................................................................................................................................................................18 Bosch Security Systems | 2003-09 | 3922 988 99482en Plena Universal Pre-amplifier | Installation and Operating Manual | Table of Contents Bosch Security Systems | 2003-09 | 3922 988 99482en en | 6 Plena Universal Pre-amplifier | Installation and Operating Manual | About the equipment 1 en | 7 About the equipment Priority Mode B/S JP109 Tel/EMG Override Priority Control S101 1mV JP102 Bal.input 1/Line 200mV P.S. XLR Speech filter JP101 ON/OFF A Tone Mic. Pin 4 Aux JP111 OFF 5-Pole Din Over Ride 1V JP110 Pin 5 Balanced Direct Output 200mV monitoring S102 1mV Bal.input 2/Line 200mV P.S. XLR Speech filter JP103 ON/OFF A,B,C,D Master B JP104 Mic. Tone Aux JP112 OFF 2 1 3 4 3V master 1V Balanced Direct Output 200mV (350mV) O In/Case Out S103 1mV Bal.input 3/Line 200mV P.S. XLR Speech filter JP105 ON/OFF C JP106 Mic. Tone Aux JP113 OFF 1V Master Cascade Blalanced Direct Output Master Line Out S301A 200mV Insertion S104 1mV 4/Line XLR 200mV P.S. Speech filter JP107 ON/OFF Master D JP108 Bal.input Master Mic. Out Tone Mic. Aux JP114 OFF 1V Blalanced Direct Output Insertion Cascade Emergency Level Preset 200mV S301B 2 (ON) F101 18V 1 (OFF) VOX JP301 VOX DETECTOR 115/230V 1A Ins/Casc/EMG In F1 24V DC F102 DC Out Figure 1.1 The Plena Universal Amplifier is a mono mixer amplifier with 4 input channels. Each channel has 3 possible input connections and a direct XLR output. You can adjust volume and tone level for each channel. The 4 input channels and the cascade input are mixed to one master signal. This master signal is available on the XLR and DIN output (mic. level). Additional outputs are the tape out and cascade out. All pre-amplifier channels and the master output can be monitored with a headphone. Bosch Security Systems | 2003-09 | 3922 988 99482en Plena Universal Pre-amplifier | Installation and Operating Manual | About the equipment en | 8 1.1 Controls and connections (front) 5 5 5 5 6 7 8 Plena Universal Pre-amplifier 1 1/Line 0 dB 2/Line 3/Line 4/Line -6 dB Master Select -20 dB 2 2 3 1 4 Master Power 3 0 4 4 4 4 Figure 1.2 1 2 3 4 5 6 7 8 VU meter (LED bar) Power on indication LED (green) Power on/off Tone control, channel 1 to 4 Volume, channel 1 to 4 Master volume Channel selection for headphone Headphone connection 1.2 Controls and connections (rear) 9 9 9 9 10 Dir.Out1 Dir.Out2 Dir.Out3 Dir.Out4 11 12 Ins/ Casc / Emgln 13 Ins/ Casc Out 14 Master Line Out 15 Master Mic. Out 115V LBB 1920/00 8900 192 00005 115/230V~,50/60Hz No. Ins/Casc + 14 3 3 5 1 5 14 4 2 3 5 2 - GND GND 1 1 3 14 + - 2 14 3 14 3 5 3 5 3 5 230V Apparatus delivired connected for 230V- 16 Rated input power: 25VA T0,5AL250V Warning 17 This apparatus must be earthed L EMG Out DC In DC Out +24V- +24V- R 1/Line 1 2 2/Line 3 1 2 3/Line 3 1 2 4/Line 3 1 2 3 4 5 6 7 Figure 1.3 1 2 3 4 5 6 7 8 9 DIN (priority) input, channel 1 to 4 XLR input, channel 1 to 4 Cinch input, channel 1 to 4 Tape output (Cinch) Earth connection screw Emergency relay output (terminal 24 V DC backup power input (terminal 24 V DC output (terminal) XLR for direct output, channel 1 to 4 Bosch Security Systems | 2003-09 | 3922 988 99482en 10 11 12 13 14 15 16 17 Insertion/ cascade switch Insertion/ cascade / emergency input Insertion/ cascade output Master Line output (XLR) Master Mic output (DIN, priority) Mains voltage 115/ 230 V switch Mains socket Mains fuse 8 Plena Universal Pre-amplifier | Installation and Operating Manual | Internal settings 2 en | 9 Internal settings LINE 3 LINE 4 CINCH XLR CINCH DIN LINE 2 XLR DIN CINCH LINE 1 XLR DIN CINCH XLR DIN CN106 S104 CN108 S103 S102 S101 MIC MIC MIC MIC LINE LINE LINE LINE CH4 CH3 CH2 CH1 SPEECH CH4 SPEECH CH3 JP105 SPEECH CH2 JP103 SPEECH CH1 JP101 OFF ON JP108 OFF ON JP106 OFF ON JP104 OFF ON JP102 AUX MIC INPUT CH4 AUX MIC INPUT CH3 AUX MIC INPUT CH2 AUX MIC INPUT CH1 JP110 OVERRIDE RELAY OFF PRIORITY JP109 ACTIVE SERIAL BLOCK OFF ON JP114 CH-4 JP113 CH-4 JP112 CN107 20-1 CH-4 JP111 4 E 3 2 E 1 4 E 3 1 B 2 CH-4 B E 1 2 3 4 M MIXING Figure 2.1 2.1 Priority mode setting The priority mode can be set with jumper JP109 to serial or blocking mode. You can activate the mixing mode for channel 1 to 4 with jumpers JP111 to JP114. The jumper JP110 enables or disables the priority override contact for the 4 input channels. This contact is available on the Master Mic output to pass through priorities. - Serial mode(default) : Channel 1 has the highest priority and channel 4 the lowest. - Blocking mode : The first activated input channel has the highest priority and blocks all other channels. - Mixing mode : The channel is mixed to the master output irrespective of priority. 2.2 Channel settings 2.2.1 Microphone or Line input If you connect a microphone to an input channel, the switch (S101 to S104) must be in the Mic position. This setting activates the Phantom power supply. If you connect a line level source the switch (S101 to S104) must be set in the line position. 2.2.2Mic/Aux input selection If you use the 5-pole DIN or the 3-pole XLR input of a channel, the corresponding jumper (JP102, JP104, JP106 or JP108) must be in the MIC position. If you use the Cinch input the jumper must be in the AUX position. 2.2.3Speech filter on/off Each channel has a speech filter that can be enabled or disabled with the corresponding jumper (JP101, JP103, JP105, and JP107). The speech filter improves speech intelligibility by cutting off the lower frequencies. Bosch Security Systems | 2003-09 | 3922 988 99482en Plena Universal Pre-amplifier | Installation and Operating Manual | Internal settings en | 10 2.3 Setting emergency, insertion or cascade The functionality of the insertion/cascade/emergency input is determined with jumper JP301 and the 'Ins/Casc' switch at the back of the unit. Input/output used for Jumper JP301 Switch Insertion OFF INS Cascade OFF CASC Emergency ON CASC Note If you use the emergency option, the emergency volume can be set with VR301. This volume is not affected by the master volume. Bosch Security Systems | 2003-09 | 3922 988 99482en Plena Universal Pre-amplifier | Installation and Operating Manual | Installation in rack 3 en | 11 Installation in rack Plena 0 dB -6 dB -20 dB Powe r Unive rsal P re-am 1/Line plifier 2/Line 3/Line 4/Line Maste r Sele ct 3 4 2 5 Maste r Figure 3.1 The universal pre-amplifier is delivered for table-top use, but you can mount it in a 19" rack. If you mount the pre-amplifier in a rack, you must: • use the mounting brackets delivered with the unit. • remove the 4 feet from the bottom of the unit. (Without the feet the unit is 2U high). Bosch Security Systems | 2003-09 | 3922 988 99482en Plena Universal Pre-amplifier | Installation and Operating Manual | External settings and connections 4 en | 12 External settings and connections ust be earthe d Rated Power input T0.5 : 100VA AL 25 0V ppara conn tus deliv ected ire for 2 d 30V- L R EMG OUT DC IN D C OUT Dir.O ut1 Dir.O ut2 Dir.O ut3 Dir.O 14 3 5 ut4 Ins/Ca sc/Em gln 3 1 5 2 4 Ins/Ca scOut +24V - 14 1/Lin 1 +24V - + 3 5 2 3 Ins/Ca sc GND 1 GND 1 e - Maste r Line Out Maste r Mic. + 2 3 14 Line1 Out 3 5 2/Lin e 115V- 14 2 3 5 14 3/Lin e Line2 3 5 Warnin This 3 Line3 0 4/Lin g apparat us must be earthed Rated input Power : T0.5AL 100VA 250V 230V- Appar conneatus delivir cted ed for 230V- L e 4 EMG + 12 V D Line R OUT DC 4 IN DC OUT +24V+24V- - F + - C 12 V D F = 1.5A C Figure 4.1 4.1 Connect the DC supply (battery) The universal pre-amplifier has a 24 Vdc input (terminal screw), which you can use to connect a back up power supply, e.g. batteries. You can earth the unit to increase the electrical stability of the system. The unit is protected against reversal of the battery polarity. Caution The connection cable must have an in-line fuse. Use the type of fuse as mentioned in the illustration. Bosch Security Systems | 2003-09 | 3922 988 99482en Plena Universal Pre-amplifier | Installation and Operating Manual | External settings and connections en | 13 4.2 Connect a microphone or line-level source Dir.O Dir.O ut1 ut1 Dir.O ut3 Dir.O ut4 ut2 14 3 5 Ins/C 3 asc/E mgln 1 5 2 4 Ins/C ascO Dir.O ut3 14 3 5 + 2 3 Maste asc 1 GND - r Line Out Maste + 2 r Mic. 3 14 1/Lin e ut4 Out 3 5 14 2/Lin e 3 5 ut Ins/C GND 1 Dir.O 14 ut2 Dir.O Dir.O LBB 1920/ 8900 00 115/2192 00005 No. 30V~,50/60 Hz 3 5 14 3 5 Warni ng This Ins/Ca sc/E mgl 3 1 5 2 4 3/Lin 0 tus must be earthe d 115V- Rated input Power : 25VA T0.5AL 250V EMG R Out DC In +24V - 3 5 + 2 3 Ins/Ca GND 1 GND 1 - 230V- Appa ratus conne delivi red cted for 230V- L 4/Lin e 14 appara e DC Out +24V - sc + 2 3 14 1/Line 3 5 2/Line GND GND GND Cinch 180 5-pole DIN 180 3-pole XLR Figure 4.2 All channels have 3 possible inputs, use one of these inputs to connect a microphone or a line-level source. The XLR and DIN input are balanced, the stereo Cinch input is unbalanced and converted to mono. If you use an input make sure that the internal switch settings are correct (refer to §2.2). Note If you want to use the priority feature, you must use a microphone or line-level source with a priority contact on pin 4 and 5 of the 5-pole DIN plug. Bosch Security Systems | 2003-09 | 3922 988 99482en Plena Universal Pre-amplifier | Installation and Operating Manual | External settings and connections en | 14 4.3 Insertion or Cascade connection Dir.Out Dir.Out 1 Dir.Out 1 2 Dir.Out 2 Dir.Out Dir.Out Dir.Out 4 Dir.Out 4 14 3 5 14 3 5 Ins/C asc/Emg 3 1 5 2 4 ln Ins/C asc/Emg 3 1 5 2 3 3 Ins/C ln 4 Ins/C 14 3 5 + 2 3 Ins/C GND 14 ascO ut Master asc 1 GND 1 - Line 1/Line ascO ut Ins/C asc GND Master Line 1 3 GND - Out Master Mic. + 2 3 Master 2 Mic. Out LBB 1920 8900 /00 115/ 192 0000 230V 5 No. ~,50 /60H z 3 5 14 3 5 Warn ing This 14 1/Line 3 5 2/Line - 1 + 14 2 Out 3 14 + 3 5 appa ratus must 3/Line be earth ed 0 115V - 230V - 14 2/Line Apparat conn us deliv ected ired for 230V - Rate d Powe input T0.5Ar : 25VA L 250V LBB 1920 8900 /00 115/ 192 0000 230V No. ~,50 14 3 5 Warn This ing appa ratus must 3/Line 0 Out DC In be earth ed Apparatu conn s ected delivired for 230V - Rated Powe input T0.5Ar : 25VA L 250V L EMG 4/Line EMG R 115V - 230V - 5 /60H z 3 5 L 4/Line Out 3 5 Out R DC Out DC In +24V - DC Out +24V - +24V+24V- Dir.Out 1 Dir.Out 2 Dir.Out 3 Dir.Out 14 3 5 4 Ins/C 3 1 5 2 4 asc/Emg ln Ins/C ascO 14 + 3 5 2 - ut Ins/C asc GND Master Line 1 3 GND 1 - Out Master Mic. + 2 3 14 1/Line EQU ALIS ER Out 3 5 14 2/Line LBB 1920 8900 /00 115/ 192 0000 230V No. ~,50 115V - 230V - 5 /60H z 3 5 14 3 5 Warn This 3/Line 0 ing appa ratus must be earth ed Rated Powe input T0.5Ar : 25VA L 250V Apparatu conn s ected delivired for 230V - L 4/Line EMG R Out DC In +24V - Figure 4.3 DC Out +24V - Figure 4.4 If you use the insertion or cascade mode, you must set the 'Ins/Casc' switch, on the rear, in the correct position. The insertion mode can be used to connect an external sound-processing device, e.g. an equaliser. To increase the number of input channels, you must use the cascade mode to link pre-amplifiers. E.g. with 2 pre-amplifiers, the second preamplifier has 8 channels on its master output (4 channels from the first pre-amplifier and 4 channels of its own). 4.4 Connect a Booster amplifier or System pre-amplifier Dir.O Dir.O ut1 ut1 Dir.O Dir.O ut2 ut2 Dir.O Dir.O ut3 ut3 Dir.O Dir.O ut4 ut4 14 3 5 1 5 2 14 Ins/C asc/E mgln 3 4 14 3 5 + 2 3 Ins/C GND ascO 1 Maste - r Line + 2 14 14 3 5 Warni This 3/Lin e 0 ng appara tus must be earthe d 115V- Rated Power input T0.5AL: 25VA 250V 3 Ins/C asc GND Maste r Line 1 GND - 2 R Out 3 5 LBB 1920/ 8900 00 115/2192 00005 14 2/Lin e No. 30V~,50/60 3 5 14 3 5 Warni This 3/Lin ng appara tus must Out DC In 115V- EMG e R DC Out Out DC In +24V - +24V - plifier Appa conneratus delivir cted ed for 230V- L 4/Lin Powe r Plena Sys 0 dB -6 dB -20 dB Powe 230V- Hz Rated Power input T0.5AL: 25VA 250V be earthe d e 0 EMG e Out Maste r Mic. + 14 e 230V- Appa conneratus delivir cted ed for 230V- +24V - 0 dB -6 dB -20 dB 2 L 4/Lin Plena Mixer Am + 3 1/Lin LBB 1920/ 8900 00 115/2192 00005 No. 30V~,50/60 Hz 3 5 Ins/C ascO ut 3 5 1 Out 3 5 2/Lin e Ins/C asc/E mgln 4 14 Maste r Mic. 14 1 5 Out 3 1/Lin e 3 ut asc 1 GND 3 5 2 Ins/C DC Out +24V - tem Pre -amplifi er r Sele /Line ct CD AUX Z1 Z2 + Z3 Z4 Z5 + Z6 Figure 4.5 The master output and/or the direct outputs can be connected to a Plena Booster to amplify the signal to loudspeaker level. You can also use the outputs to connect the universal pre-amplifier to the System pre-amplifier or other equipment. The Master Mic output (DIN) has a priority relay contact on pin 4 and 5. This relay is activated when a priority contact of one of the inputs is closed. Bosch Security Systems | 2003-09 | 3922 988 99482en Plena Universal Pre-amplifier | Installation and Operating Manual | External settings and connections en | 15 4.5 Connect an emergency input line Dir.O ut4 Dir.O ut1 Dir.O ut2 Dir.O ut3 Dir.O Ins/C 14 asc/E 3 5 Ins/C asc/E mgln 1 5 2 4 mgln 14 2 3 Ins/C asc GND Maste 1 GND - r Line Out Maste + 2 14 e 2/Lin ut r Mic. Out 3 5 14 e LBB 1920/ 8900 00 115/2192 00005 No. 30V~,50/60 Hz 3 5 14 3 5 Warni ng This Ins/C M asc - + 3 ascO 1 Ins/C ascO ut 3 5 1 1/Lin Ins/C GND ut4 3 3/Lin e 0 appara tus must be earthe d 115V - 230V - Rated input Power : T0.5AL 25VA Appa ratus conne delivi red cted for 230V - 250V L 4/Lin e EMG R Out DC In +24V - + DC Out +24V - 2 3 14 3 5 14 3 5 3/Lin e Figure 4.6 You can use this input for emergency announcements and/or signals. This line is activated when the signal is above a certain threshold (VOX). When the line is activated it has the highest priority and overrules all input channels. The emergency line has its own internal volume control and is not affected by the master volume. To set the emergency volume, refer to §2.3. If you use the emergency input make sure that the internal settings are correct (refer to §2.2). Note The emergency input has a 24 V relay output (screw terminal), which is activated on the VOX of the input. An additional 24 Vdc output (screw terminal) is available to power external relays. Bosch Security Systems | 2003-09 | 3922 988 99482en Plena Universal Pre-amplifier | Installation and Operating Manual | Operation 5 en | 16 Operation Plena 0 dB -6 dB -20 dB Unive rsal P re-am plifier 1/Li ne 2/Line Powe r 3/Line 4/Line Maste r Selec t 2 3 1 4 Maste r Figure 5.1 5.1 Set Line input volume, treble and bass You can adjust the volume, treble and bass for each channel by turning the corresponding knobs. To change the overall volume you must turn the 'Master' volume knob. 5.2 Line monitoring The line monitoring can be used to listen to a single channel or the master channel. To do so connect a headphone at the front of the pre-amplifier. Use the 'Select' switch to select a channel. Note The VU-meter always shows the volume for the selected channel. Bosch Security Systems | 2003-09 | 3922 988 99482en Plena Universal Pre-amplifier | Installation and Operating Manual | Technical data 6 Technical data 6.1 Electrical Mains voltage Max mains power consumption Battery voltage Max battery current 230/115 Vac, ±15 %, 50/60 Hz 25 VA 24 Vdc, +20 %/-10 % 1A 6.2 Performance Frequency response Distortion Bass control Treble control Line separation at 1 kHz Priority mute 50 Hz - 20 kHz (+1/-3 dB) <0.5 % ±10 dB at 100 Hz ±10 dB at 10 kHz >70 dB >40 dB 6.3 Inputs Mic/Line inputs 1-4 (3-pin XLR/5-pin DIN, balanced) Sensitivity 1 mV (microphone), 200 mV (line) Impedance >1 kOhm (microphone), >5 kOhm (line) S/N (flat at max volume) >63 dB (microphone), >70 dB (line) S/N (flat at min volume/muted) >75 dB CMRR >40 dB (50 Hz - 20 kHz) Headroom >25 dB Speech filter -3 dB at 315 Hz, high-pass, 6 dB/oct Phantom power supply 16 V via 1.2 kOhm, in microphone mode only Line inputs 1-4 (Cinch, unbalanced, stereo converted to mono) Sensitivity 200 mV Impedance 22 kOhm S/N (flat at max volume) >70 dB S/N (flat at min volume/muted) >75 dB Headroom >25 dB Bosch Security Systems | 2003-09 | 3922 988 99482en en | 17 Plena Universal Pre-amplifier | Installation and Operating Manual | Technical data 6.4 Outputs Direct outputs 1-4 (3-pin XLR, balanced) Nominal level Impedance 1V <100 Ohm Master output (3-pin XLR, balanced) Nominal level Impedance 1V <100 Ohm Master output (5-pin DIN, balanced) Nominal level Impedance 4 mV (microphone level) <100 Ohm Tape output (Cinch, 2x mono) Nominal level Impedance 350 mV <1 kOhm Headphone output (6.3 mm jack stereo, signal mono) Nominal level 3V Impedance <100 Ohm 6.5 Interconnection Interconnection/emergency input (3-pin XLR, balanced) Sensitivity 200 mV (interconnection) 100 mV - 1 V adjustable (emergency) Impedance >10 kOhm VOX threshold 45 mV (emergency) Interconnection output (3-pin XLR, balanced) Nominal level 200 mV Impedance <100 Ohm 6.6 Relays Priority relay contacts Emergency relay contacts DC supply output voltage 30 V, 1 A 30 V, 1 A 24 V, 250 mA max 6.7 Environmental conditions Operating temperature range Storage temperature range Relative humidity -10 to +55 °C -40 to +70 °C <95 % 6.8 General EMC emission EMC immunity Dimensions Weight acc. to EN 55103-1 acc. to EN 55103-2 100 x 430 x 270 mm (19" wide, 2U high) approx. 5 kg Bosch Security Systems | 2003-09 | 3922 988 99482en en | 18 For more information visit www.boschsecuritysystems.com © Bosch Security Systems B.V. Data subject to change without notice 2003-09 | 3922 988 99482en