Important safeguards

Alerts on the apparatus

This symbol found on the apparatus indicates hazards arising from dangerous voltages.

This symbol found on the apparatus indicates the user should read all safety statements found in the operating instructions.

This symbol found on the apparatus indicates double insulation.

Warning

To reduce the risk of fire or electrical shock, do not expose this apparatus to rain or moisture.

This symbol found on the apparatus indicates that the apparatus must be placed in a separate collection facility for electronic waste and not disposed with household waste.

1Read instructions - All the safety instructions for use should be read before the system is operated.

2 Retain instructions - The safety instructions and operating instructions 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.

5Cleaning - Unplug system units from the mains outlet before cleaning. Do not use liquid cleaners or aerosol cleaners. Use only a dry cloth for cleaning.

6Attachments - Do not use attachments not recommended by the product manufacturer as they may cause hazards.

7Water 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.

8Accessories - 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.

9Ventilation - 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. Maintain a minimum distance of 2 inch (50 mm)

around the front, the rear, and the sides of the unit for sufficient ventilation.

10Heat sources - Do not install the unit near any heat sources such as radiators, stoves, or other apparatus that produce heat (including amplifiers).

11Open flames - No open flames, such as lighted candles, should be placed on the unit.

12Power 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".

13Grounding 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.

14Power-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.

15Overloading - Do not overload outlets and extension cords as this can result in a risk of fire or electrical shock.

16Object 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.

17Servicing - 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.

18Damage 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.

19Replacement 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.

20Safety 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.

21Lightning - 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.

22Disconnection - To completely disconnect this unit 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 to be able to disconnect power from the unit.

23Before installing or operating this product, always read the Safety Instructions, which are available as a separate document (9922 141 7014x). These instructions are supplied together with all equipment that can be connected to the mains.

American Users

Note

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.

This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment OFF and ON, the user is encouraged to try to correct the interference by one or more of the following measures:

???Reorient or relocate the receiving antenna.

???Increase the separation between the equipment and the receiver.

???Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

???Consult the dealer or an experienced radio/TV technician for help.

Canadian Users

Note

This Class B digital device complies with Canadian ICES-003.

Cet appareil num??rique de classe B est conforme ?? la norme NMB-003 du Canada.

Thank you for choosing a Bosch Security Systems product!

1.1Purpose

The purpose of these Installation and User Instructions is to provide information required for installing, configuring and operating a Plena Mixer Amplifier.

1.2Digital document

These Installation and User Instructions are also available as a digital document in the Adobe Portable Document Format (PDF).

1.3Intended audience

These Installation and User Instructions are intended for installers and users of a Plena system.

1.6.1Note icons

The icons used in combination with Notes provide extra information about the Note. See the following examples:

Note

General icon for notes.

Note

Consult the indicated source of information.

1.4Related documentation

Safety Instructions (9922 141 1036x).

1.5Alerts

Four types of alerts are used in this manual. The alert type is closely related to the effect that may be caused if it is not observed. These alerts - from least severe effect to most severe effect - are:

???Note

Alert containing additional information. Usually, not observing a note alert does not result in damage to the equipment or personal injuries.

???Caution

The equipment can be damaged if the alert is not observed.

???Warning

Persons can be (severely) injured, or the equipment can be seriously damaged, if the alert is not observed.

???Danger

Not observing the alert can result in death.

1.6.2Caution, Warning, and Danger

icons

The icons used in combination with Caution, Warnings, and Dangers indicate the type of hazard present. See the following examples:

Caution, Warning, Danger

General icon for Cautions, Warnings and

Dangers.

Caution, Warning, Danger

Icon for risk of electric shock.

Caution, Warning, Danger

Icon for risk of electrostatic discharge.

2Description

2.1The Plena product range

The Plena Mixer Amplifier is part of the Plena product range. Plena provides public address solutions for places where people gather to work, worship, trade, or relax. It is a family of system elements that are combined to create public address systems tailored for virtually any application

The Plena product range includes:

???mixers

???preamplifiers

???power amplifiers

???a music source unit

???a digital message manager

???a feedback suppressor

???call stations

???an All-in-One system

???a voice alarm system

???a timer

???a charger

???a loop amplifier

The various elements are designed to complement each other thanks to matched acoustical, electrical and mechanical specifications.

2.2Contents of box

The packaging box contains the following contents:

???PLE-1MA030-US, PLE-1MA060-US, or PLE-1MA120

???Labels and colored pins for indicating favorite settings

???Power cord

???Plena Bonus CD

???Mounting brackets (LBC 1901/00)

2.3The Plena Mixer Amplifier

The Plena Mixer Amplifier is a high performance, professional public address unit for mixing up to four separate microphone/line signals, and any one of three separate music signals. For a schematic overview of the Plena Mixer Amplifier, see figure 2.1 on the next page.

The volume of each microphone/line signal can be individually adjusted to obtain the required mix; the mixed output is controlled via the master volume control and separate high/low tone controls.

The unit is easy to use, and provides a crisp call or clear music. The amplifier also has enhanced features such as ducking level control, priority, labelling, and setting indicators.

All Microphone/line inputs can be switched between microphone level and line level sensitivity. The inputs are balanced but can also be used unbalanced. Phantom power can be selected via a DIP switch to provide power to condenser microphones. Input channels 1 and 2 can take priority over all other microphone and music inputs:

???Input 1 can be activated by contact closure on a PTT (push to talk). A chime can be configured to precede an announcement.

???Input 2 can be switched automatically if a signal is available at the input, for example, if someone speaks into the microphone (VOX activation).

A telephone/70 V emergency input with VOX activation is also provided for easy integration with another PA system or a telephone paging system. It has its own volume control and overrides all other inputs, including the call station and inputs 1 and 2.

The unit also has a line output to add amplifiers for larger systems that require more output power. This output can be switched to music only, for example, so that music on hold can be provided for the telephone system.

Users can create custom labels for inputs and music sources. These labels can be attached to the special holders at the front of the mixer amplifier. Colored pins can also be inserted at various positions around the volume and tone dial controls to indicate favorite settings for a particular application.

2.4Controls, connectors and indicators

2.4.1Front panel

See figure 2.2 for an overview of the controls and indicators.

1 Power button.

2Label holder for user-defined description of microphone/line inputs - custom labels can be

created by user.

3 Label holder for user-defined description of music sources - custom labels can be created by user.

4 Master high tone control.

5Master volume control - controls all inputs except emergency and call station.

6 Output level meter (-18 db, 0 db)

7Input level control:

???microphone/line 1

???microphone/line 2

???microphone/line 3

???microphone/line 4

8 Music source selector (for music inputs 1, 2, and 3). 9 Music source volume control.

10Master low tone control.

11Air inlet holes.

Note

Do not obstruct the airflow into the unit.

Note

Users can create custom labels for the microphone/line inputs and description of the music sources. These labels can be attached to the mixer amplifier at position numbers 2 and 3 (see figure 2.2). Colored pins can also be inserted at various positions around the dial controls to indicate the favorite settings for a particular application. For more information on inserting and removing pins, see section 4.3.2.

2.4.2Plena PLE-WP2Z3S wall panel

The optional Plena PLE-WP2Z3S wall panel can be used to remotely control the unit from a maximum of four remote locations. The appearance of the wall panel is matched to the Bosch loudspeaker volume controls.

The music source can be easily changed. The status of each music source is indicated by an LED.

A standard CAT 5 cable is used to connect the wall panel to the mixer-amplifier. The maximum distance is 200 m. Please refer to the relevant datasheet for more information.

2.4.3Rear panel

See figure 2.3 for an overview of the connectors and switches:

1 Tel. emergency/70V input, Euro style pluggable screw terminal connector - VOX function. This input has highest priority.

2 Telephone emergency/70V input volume control - control range -25 dB to 0dB (see number 1).

3Remote control wall-panel-input, RJ-45 connector. Wall panel incorporates: BGM source selection, and

zone on/off control.

4Ducking level control for microphone/line inputs 1 and 2.

5Music input (number 1 disc), 2x RCA/cinch connectors. Stereo, summed mono.

6 Music input (number 2 radio), 2x RCA/cinch connectors. Stereo, summed mono.

7 Music input (number 3 auxiliary), 2x RCA/cinch connectors. Stereo, summed mono.

8Music master output, XLR connector - switch setting for line out, or music only. This output can carry out either music only, or the master output. For more

information, see chapter 4.2.3. 9 Cooling fan (PLE-1MA120 only).

Note

Always allow adequate space at the rear of the

unit for ventilation.

10Microphone/line 1 input with trigger, Euro style pluggable screw terminal connector - DIP switch settings for: chime, PTT (push to talk), mic/line, speech filter, and phantom power (see number 11).

11DIP switch for microphone/line 1 and microphone/ line 2 (see numbers 10 and 12 respectively).

12Microphone/line 2 input, Euro style pluggable screw terminal connector - DIP switch settings for speech filter, mic/line, VOX, and phantom power (see number 11).

13Microphone/line 3 input, Euro style pluggable screw terminal connector - DIP switch settings for mic/line, and phantom power (see number 14).

14DIP switch for microphone/line 3 and microphone/ line 4 (see numbers 13 and 15 respectively).

15Microphone/line 4 input, Euro style pluggable screw terminal connector - DIP switch settings for mic/line, and phantom power

(see number 14).

16Outputs:

???Call only, screw terminal connector 70 V.

???Screw terminal connector 25 V, 70 V, and 4 Ohm. 17 Mains fuse.

18 Ground connection screw.

Note

The unit must be grounded.

19 Mains connector (3-pole).

figure 2.3: Rear panel

9

Output

3Installation

3.1Unpack unit

1 Remove the unit from the box, and discard the packaging material according to local regulations.

2Use your fingernails to carefully peel off the protective plastic film from the label holders. Do not use sharp or pointed objects.

3.2Install unit in rack (optional)

The Plena Mixer Amplifier is intended for tabletop use, but you can also mount the unit in a 19" rack (see figure 3.1).

If you mount the unit in a rack, you must:

???ensure that it does not exceed the overheating temperature (45 ??C ambient).

???use the included Bosch mounting brackets (LBC 1901/00).

???remove the 4 feet from the bottom of the unit.

figure 3.1: Installing the unit in a rack

3.3Check settings/connections

1 Connect any additional equipment (see section 4.1 and 4.2).

2 Check the settings (see section 4.3).

3.4Connect unit to mains

Caution

Potential equipment damage. Before connecting power, always check the voltage indicator plate at the rear of the unit.

1 Make sure the power switch on the front of the unit is set to Off.

2Connect the power cord to the mains connector and plug it into the mains outlet.

figure 3.2: Power connection and voltage selector

The priority microphone (or a generic call station) that can be used with push to talk (PTT) should be connected to ???microphone/line 1 input???. The PTT mode can be activated by setting the DIP switch (11) at the rear of the unit. Microphone/line 1 input has priority over all other microphone/line inputs.

If, however, the ???Tel. emergency/70V input??? receives a signal, all inputs including microphone/line 1 input will be overruled.

The microphone/line 1 input has a Euro style pluggable screw terminal connector. This Euro style pluggable screw terminal connector has a trigger input, which can be used in combination with the Euro connector.

The priority microphone can be connected to the microphone/line 1 input with trigger as follows:

???Euro connector with trigger. See figure 4.1.

???Euro connector only (without trigger).

Set the DIP switch settings for microphone/line 1 with trigger, as required. See section 4.3.

Note

When connecting an unbalanced line level (200 mV) signal to the microphone/line input, connect it as follows: Signal to +, connect to - and GND to ground.

figure 4.1: Euro connector with trigger

4.1.2Secondary microphone (input 2)

Connect a secondary microphone to ???microphone/line input 2???. See figure 4.2.

Microphone/line input 2 has a DIP switch (11) at the rear of the unit for setting the VOX mode. If the DIP switch is set to VOX, the microphone/line input will automatically be switched when a signal is sensed at the microphone/line 2 input. For example, when someone speaks into the microphone, other sound will either be muted or ducked, depending on the setting of the ducking level control at the rear of the unit. See section 4.3.

The Tel. emergency/70V input and Microphone/line input 1 all have priority over the Microphone/line input 2. Therefore, any signal received on any one of these inputs will always be heard regardless of the ducking level control setting for Microphone/line input 2.

Set the DIP switch settings for microphone/line input 2 as required. See section 4.3.

4.1.3Additional microphones (inputs 3 and 4)

Connect additional microphones to microphone/line inputs 3 and 4 as required. See figure 4.2. These microphones will mix with the background music.

Set the DIP switch settings for microphone/lines 3 and 4, as required. See section 4.3.

4.1.4Emergency inputs

The Tel. emergency/70V input, with VOX functionality, is used for receiving emergency announcements or signals (such as a fire alarm). This input has absolute priority, and will overrule all inputs when an emergency announcement or signal is received.

Either a telephone line or a 70 V input signal can be connected to the Euro style pluggable screw terminal connector (1) at the rear of the unit. See section 4.1.4.1 and section 4.1.4.2.

Caution

Never connect telephone lines and a 70 V signal to the Euro style connector at the same time.

To adjust the volume of the emergency announcement or signal, turn the rotary dial (2) at the rear of the unit. For safety reasons, the volume of the emergency announcement or signal cannot be set to zero.

The master volume control setting (5) does not influence the volume setting of the emergency announcement or signal.

Note

Tel. emergency input does not mute the incoming signal so that an incoming pilot tone will be fed to the zone outputs. With this feature it is possible to use the mixer amplifier in a Bosch Voice Alarm System when using end of line boards (PLN-1EOL).

The signal that is delivered to the unit should be quiet when a call is not made. The pilot tone and frequencies below 300 Hz are filtered from the trigger signal so that the input will not trigger from a pilot tone or low frequency rumble.

4.1.4.1 Connecting 70 Volt input signal

Connect the 70 Volt input signal as shown in figure 4.3.

4.2Connecting outputs

4.2.1Main output

Connect speakers to the 70 V or 4 Ohm terminal on the Euro style pluggable screw terminal connector (16) at the rear of the unit.

Also see section 4.2.4 ???Connecting speakers???.

4.2.2Call only

Connect speakers to the 70 V terminal on the Euro style pluggable screw terminal connector (16) at the rear of the unit.

Also see section 4.2.4 ???Connecting speakers???.

4.2.3Music only

Use the music master output connector (8) to provide a dedicated music out source for another device. For example, the music master output can be connected to a telephone coupler, so that callers can listen to music when they are put on hold (see figure 4.6).

To select the dedicated music out source, set the internal jumper. Only the music inputs (5, 6, and 7) will be audible. All other inputs, including the Tel. emergency/70V input will not be sent to this output.

To hear all mixed inputs (microphone/line, emergency, and music) set the internal jumper.

figure 4.7: Connecting speakers

The mixer amplifier can drive 70 V constant voltage loudspeakers.

Connect the loudspeakers in parallel and check the loudspeaker polarity for in-phase connection. The summed loudspeaker power should not exceed the rated amplifier output power.

You can use the Call Only output for 3-wire remote volume control override. You can also use this output as an extra zone where announcements can be heard, but not music.

Connect low impedance loudspeakers to the 4 Ohm/0 terminals. This output can deliver the rated output power into an 4 Ohm load. Connect multiple loudspeakers in a series/parallel-arrangement to make the combined impedance 4 Ohm or higher. Check the loudspeaker polarity for in-phase connection.

5.2Microphone/line controls

Note

Users can create custom labels for the microphone/line inputs and description of the music sources. These labels can be attached to the mixer amplifier at position numbers 2 and 3 (see figure 5.1). Colored pins can also be inserted at various positions around the dial controls to indicate the favorite settings for a particular application.

Use the volume controls (7) to individually control the sound level of microphone/line inputs 1 through 4.

5.3Music controls

5.3.1Source selection

Use the music source selector (8) to select one of the connected music sources.

5.3.2Volume control

Use the music source volume control (9) to control the sound level of the selected music source.

5.4Tone control

The tone controls are not standard bass and

treble controls: they can be used as a traditional tone control with high and low control, but also have a powerful contour that addresses problems found in real situations.

The tone control for the low frequencies boosts deep bass first without making the sound boomy, and cuts rumble without loosing warmth in the low frequencies.

Use the Hi (high) and Lo (low) tone controls (see figure 5.1, numbers 4 and 10) to change the tone.

5.5Output controls

5.5.1Master volume control

Use the master volume control dial (5) to collectively control the sound level of all outputs, except the emergency announcement/signal.

6Technical data

6.1Electrical

6.1.1Mains power supply

Voltage

230 VAC, ??10%, 50/60 Hz

Inrush Current PLE-1MA030-US

4.5 A

Inrush Current PLE-1MA060-US

5 A

Inrush Current PLE-1MA120-US

10 A

6.1.2Power consumption

PLE-1MA030-US

100 VA

PLE-1MA060-US

200 VA

PLE-1MA120-US

400 VA

6.1.3Performance

Frequency response

50 Hz to 20 kHz (+1/-3 dB @ -10 dB ref. rated output)

Distortion

<1% @ rated output power, 1 kHz

Bass Control

Max -12/+12 dB (frequency is level dependent)

Treble Control

Max -12/+12 dB (frequency is level dependent)

6.1.4RJ-45 input 1 x

Wall panel input

For PLE-WP3S2Z

6.1.5Mic/line input 4 x

Input 1 (Push-to-talk contact with ducking functionality)

5-pin Euro style, balanced, phantom

Input 2-4 (VOX with ducking functionality on input

2)

5-pin Euro style, balanced, phantom

Sensitivity

1 mV (mic); 200 mV (line)

Vox sensitivity

-15 dB (attack time 20 ms; release time 4 s)

Impedance

>1 kohm (mic); >5 kohm (line)

S/N (flat at max volume)

63 dB (mic); >70 dB (line)

S/N (flat at min volume/muted)

>75 dB

Dynamic range

100 dB

S/N (flat at max volume)

>63 dB (mic); >70 dB (line)

S/N (flat at min volume/muted)

>75 dB

CMRR

>40 dB (50 Hz to 20 kHz)

Headroom

>25 dB

Speech filter

-3 dB @ 315 Hz, high-pass, 6 dB/oct

Phantom power supply

16 V via 1.2 kohm (mic)

6.1.6Music inputs 3x

Connector

Cinch, 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

6.1.7Emergency / telephone 1 x

Connector

7-pin, Euro style pluggable screw connector

Sensitivity tel

100 mV ??? 1 V adjustable

Sensitivity 70V

10 V ??? 70 V adjustable

Impedance

>10 kohm

S/N (flat at max volume)

>65 dB

VOX

threshold 50 mV; attack time 150 ms; release time 2 s

6.1.8Master/music output 1 x

Connector

5-pin Euro style pluggable screw connector, balanced

Nominal level

1 V

Impedance

<100 ohm

6.1.9Loudspeaker outputs 70 V

Connector

Screw connector, floating

Max / rated PLE-1MA030-US

45 W / 30 W

Max / rated PLE-1MA060-US

90 W / 60 W

Max / rated PLE-1MA120-US

180 W / 120 W

6.1.10 Loudspeaker output 4 Ohm*

Connector

Screw terminal, floating

PLE-1MA030-US

16 V (30 W)

PLE-1MA060-US

22 V (60 W)

PLE-1MA120-US

31 V (120 W)

6.2Mechanical

Dimensions (H x W x D)

100 x 430 x 270 mm (19" wide, 2U high)

Mounting

Stand-alone, 19" rack

Color

Charcoal

Weight (PLE-1MA030-US)

Approx. 5 kg

Weight (PLE-1MA060-US)

Approx. 8.5 kg

Weight (PLE-1MA120-US)

Approx. 10.5 kg

6.3Environmental

Operating temperature

-10 to +45 ??C

Storage temperature

-40 to +70 ??C

Relative humidity

<95%

Acoustic noise level of fan (PLE-1MA120-US)

<33 dB SPL @ 1 m