MONACOR PA-5240 PA Mixing Amplifier for 5 Zones Instruction Manual

MONACOR PA-5240 PA Mixing Amplifier for 5 Zones

Product Information

Specifications

• Model: PA-5240, PA-5480
• Max Output Power: 240 W Sinus (PA-5240), 480 W Sinus (PA-5480)
• Frequency Response: Not specified
• Signal-to-Noise Ratio: > 80 dB (Line), > 70 dB (Mic)
• THD: < 1%
• Bass Control Range: 0-10
• Treble Control Range: 0-10
• Operating Temperature: Not specified
• Power Supply: ~230 V / 50 Hz, 750 VA
• Backup Power: 24 V max. 20 A
• Weight: 16 kg

Product Usage Instructions

Installation

1. Connect speakers to the appropriate channels – Channel 1 for PA-5240 and Channel 2 for PA-5480.
2. Connect inputs to the designated input terminals for each channel.
3. For remote power control, plug the power cable into the designated power socket and then into a power outlet.

Operation
To activate the chime or alarm siren, use the CHIME button, a remote button connected to the “Remote Chime” terminals, or a PTT microphone.

Safety Measures
In case of a short circuit at a speaker output, locate and resolve the short circuit immediately.

Frequently Asked Questions (FAQ)

• Q: Do I need specific knowledge to operate this PA mixing amplifier?
  A: No, specific knowledge of 100 V technology is only required for installation. For regular operation, no special knowledge is needed.

• Q: How do I adjust the bass and treble settings on this amplifier?
  A: The bass and treble controls range from 0 to 10. You can adjust these settings using the corresponding knobs on the amplifier.

These instructions are intended for installers with specific knowledge of 100 V technology for PA applications. For operation (chapter 6), however, no specific knowledge is required. Please read the instructions carefully before operation and keep them for later reference. All operating elements and connections described can be found on page 2.

Block diagram

Overview

Front panel

1. Cover of the insertion compartment; a MONACOR insertion module can be installed here, e. g tuner, MP3 / CD player, message storage

2. Chime key

3. Switch for selecting the inputs AUX 5 – 7

4. Tone controls “Bass” (±10 dB / 100 Hz) and “Treble” (±10 dB / 10 kHz)

5. Additional tone controls for a module installed in the compartment (1)

6. Zone attenuators for separate volume control of the individual speaker zones

7. Microphone input MIC (6.3 mm jack, bal.) for input 1, connected in parallel to the jack INPUT-1 (21)

8. Level controls of inputs 1 – 4 and AUX

9. MASTER control for the master volume

10. VU-meter for the power amplifier [independent of the zone attenuators (6)]; in case of overload, the red LED “clip” will light up

11. LED “stand by”, will light up when the amplifier has been switched off

12. LED “power”, will light up when the amplifier is switched on

13. LED “prot”; will light up when the amplifier has been muted due to overheating

14. POWER switch
    Rear panel

15. Protective cover for the screw terminals Caution! Never operate the amplifier without the cover.

16. Speaker terminals for the 100 V speakers Attention! Each of the five-zone outputs allows a maximum load of 100 W RMS by the speakers; however, the total admissible load must never be exceeded:
    PA-5240 240 W RMS
    PA-5480 480 W RMS

17. Cover; when installing an insertion, further connections can be fitted here, if required

18. 6.3 mm jacks AMP IN and PRE OUT for inserting a device, e. g. equalizer; it is also possible to connect a second PA amplifier to the jack PRE OUT if the output power is not sufficient for operating further speakers

19. Inputs AUX 5 – 7 for devices with line level (e. g. MP3 / CD player, cassette recorder, etc.), to be selected with the sliding switch (3); the two stereo channels L and R respectively will be internally mixed to a mono signal

20. Input jack for channel 2 (combined XLR / 6.3 mm jack) for connecting a microphone [button “Mic / Line” (35) not pressed] or a device with line level [button “Mic / Line” pressed]; connected in parallel to the terminal strip (34) below it

21. Input jack for channel 1 (combined XLR / 6.3 mm jack) for connecting a microphone; connected in parallel to the jack MIC (7)

22. Ground connection for the two speaker connections “8 Ω” (23) and “100 V” (25) next to it

23. Direct output for an 8 Ω speaker or an 8 Ω speaker group; the zone attenuators (6) will not affect this output
    Attention! Only use this output when the 100 V outputs (16 and 25) are not used. Otherwise, this will result in an overload of the amplifier.

24. Mains jack for connection to a mains socket (230 V / 50 Hz) via the supplied mains cable

25. Direct output for 100 V speakers; the zone attenuators (6) will not affect this output
    Attention! The total load of all speakers connected must not exceed 240 W RMS (PA-5240) or 480 W RMS (PA-5480).

26. Terminal strip* AC POWER REMOTE for an external switch for remote activation and deactivation
    Note: For remote activation, the device must not be switched on with the POWER switch (14).

27. Fuse for the emergency power supply; always replace a blown fuse by one of the same type

28. Screw terminals for an emergency power supply: ⎓ 24 V

29. “Ground / Lift” switch; in case of hum problems, for separating the signal ground from the housing ground (position “Lift”)

30. Screw terminals

31. “Remote Siren” for remote activation of the siren via a switch

32. “Remote Chime” for remote activation of the chime via a momentary pushbutton switch

33. “INPUTS Chime On /Off” with short circuit bridge

34. When the bridge is removed, remote activation of the chime via the terminal strips (34) of inputs 2 – 4 will be impossible.

35. Control “Mute Level” for adjusting the volume attenuation in case of announcements or activation of the chime or siren

36. Control “Siren Level” for adjusting the siren volume

37. Control “Chime Level” for adjusting the chime volume

38. Terminal strips* for inputs 2 – 4; for channel 2, this input is connected in parallel to the jack (20) above; The contacts are used respectively for remote activation of the chime and for automatic volume attenuation of the AUX channel.

39. Selector switch of inputs 2 – 4: microphone level (button not pressed) or line level (button pressed)

40. Switch “P.H. +18 V” of inputs 2 – 4 for connecting the 18 V phantom power; required when connecting phantom-powered condenser or electret microphones
    Attention! With the phantom power connected, never connect any unbalanced microphones to the corresponding inputs; these microphones may be damaged.

41. Switch “P.H. +18 V” for input 1 for connecting the 18 V phantom power

Safety Notes and Instructions for Use

The device corresponds to all relevant directives of the EU (marking ). The device corresponds to the relevant UK legislation (marking UKCA).

WARNING The device uses dangerous mains voltage. Leave servicing to skilled personnel only and do not insert anything into the air vents. Risk of electric shock! During operation, there is a hazard of contact with a voltage up to 100 V at the speaker terminals (16, 25). Never operate the amplifier without the protective cover (15). Always switch off the PA system before making or changing any connections

• The device is suitable for indoor use only. Protect it against dripping water and splash water, high air humidity and heat (admissible ambient temperature range 0 – 40 °C).
• Do not place any vessel filled with liquid on the device, e. g. a drinking glass.
• The heat generated within the device must be carried off by air circulation. Never cover the air vents.
• Do not operate the device and immediately disconnect the plug from the mains socket
  1. if the device or the mains cable is visibly damaged,
  2. if a defect might have occurred after the device was dropped or if suffered a similar accident
  3. if malfunctions occur. In any case the device must be repaired by skilled personnel.
• Never pull the mains cable when disconnecting the mains plug from the socket, always seize the plug.
• For cleaning only use a dry, soft cloth; never use chemicals or water.
• No guarantee claims for the device or liability for any resulting personal damage or material damage will be accepted if the device is used for other purposes than originally intended if it is not correctly connected or operated, or if it is not repaired expertly.

Applications and Accessories

The amplifiers PA-5240 and PA-5480 have been specially designed for use in 100 V PA systems. 100 V outputs for up to five speaker zones are available. The volume of these zones can be individually adjusted. To the five input channels which can be mixed, microphones (channels 1 – 4) or devices with line level (channels 2 – 5) can be connected. One of the following MONACOR insertions can be installed into the insertion compartment (1):

The PTT desk microphone PA-5000PTT from MONACOR has been specially designed as a separate accessory for these amplifiers. The microphones PA-5000PTT can be connected to the terminal strips (34) of channels 2 – 4.

Setting up the Amplifier

The amplifier has been designed for installation into a rack (482 mm / 19”), however, it can also be used as a tabletop device. In any case, air must be allowed to pass through all air vents to ensure sufficient cooling of the power amplifier.

1. Installation into a Rack
   For installation into a rack, 3 rack units (133 mm) are required. To prevent the top-heaviness of the rack, the amplifier must be inserted into the lower part of the rack. The front panel alone will not be able to secure the device; side rails or a base plate must be additionally provided. The hot air blown out at the side of the amplifier must be dissipated from the rack; otherwise, heat will accumulate in the rack which may not only damage the amplifier but also other devices in the rack. In case of insufficient heat dissipation, install a ventilation unit into the rack.

Installation

All connections should only be made by qualified skilled personnel. For this purpose, always switch off the amplifier! Numerous connections, e. g. those for the speakers, are underneath the protective cover (15). For connection, unscrew the cover.

WARNING Do not operate the amplifier without the protective cover (15). During operation, there is a hazard of contact with a voltage up to 100 V at the speaker terminals (16, 25). After connecting, screw on the cover again so that the terminals are protected against any accidental contact.

Speakers

1. Either connect 100 V speakers for the five speaker zones to the terminals ATT ZONE OUTPUTS (16)
   Attention! In each speaker zone, the maximum load by the 100 V speakers may be 100 W RMS; however, the total admissible load of all speakers must not be exceeded:
   240 W RMS (PA-5240) or
   480 W RMS (PA-5480)
   or a speaker group of a total impedance of at least 8 Ω to the terminals COM (22) and 8 Ω (23). The zone attenuators (6) will not affect this output.
   Always observe the correct polarity when connecting. For the 8 Ω connection, the terminal COM is the negative pole and the terminal 8 Ω the positive pole. The positive connection of the speaker cables is always specially marked.

2. Additional 100 V speakers, the volume of which is not to be attenuated by the zone attenuators (6) can be connected to the terminals COM (22) and 100 V (25). However, the total load of these speakers and the speakers at the terminals ATT ZONE OUTPUTS must not be exceeded (see note “Attention” above).

3. Microphones
   Four microphones can be connected, one microphone each to channels 1 – 4:

4. In channel 1 to the jack MIC (7) on the front panel or to the combined XLR / 6.3 mm jack INPUT-1 (21)
   A signal in channel 1 will take priority over all other signals, i. e. the volume of the other signals will be automatically attenuated if you speak into the microphone of channel 1.

5. In channel 2 to the combined XLR / 6.3 mm jack INPUT-2 (20) or to the terminal strip (34) below it*

6. In channel 3 to the terminal strip INPUT-3 (34)*

7. In channel 4 to the terminal strip INPUT-4 (34)*
   * Note: When the talk button of the microphone PA-5000PTT is pressed, the volume of the AUX channel will be automatically attenuated.

To facilitate handling, it is possible to remove the terminal strips (34) from their plug-in connections on the device and to reinsert them after connection.

1. Connect the microphones to the corresponding connectors. Connect the microphones PA-5000PTT to the terminal strips (34) so that it will be possible to activate the chime from these microphones and to attenuate the volume of the AUX channel.
2. In channels 2 – 4, the button “Mic / Line” (35) must not be pressed when connecting a microphone so that the input is switched to microphone sensitivity.
3. When using a phantom-powered microphone, press the corresponding button “P.H. +18V” (36, 37). The microphone will then be supplied with 18 V by the amplifier.
   Attention! With the phantom power connected, unbalanced microphones must not be connected to the corresponding inputs; these microphones may be damaged.

Devices with line output
Six devices with line output (e. g. MP3 / CD player, tuner, tape deck) can be connected, one device each to channels 2 – 4 and three devices to the AUX channel.

1. Connect the devices to the corresponding connectors:

   • combined XLR / 6.3 mm jack INPUT-2 (20)
   • terminal strips INPUT-2 to INPUT-4 (34)
   • RCA jacks AUX INPUTS (19)
     When connecting a stereo device to the combined XLR / 6.3 mm jack (20), use a stereo mono adapter (e. g. SMC-1 from MONACOR) and an adapter cable (e. g. MCA-300 from MONACOR); otherwise, the signals of the stereo centre will cancel out each.

2. In channels 2 – 4, press the corresponding button “Mic / Line” (35) when connecting a device with line level so that the input is set to line level. To ensure that the phantom power is deactivated, the corresponding button “P.H. +18V” (36) must not be pressed.

3. For the AUX channel, use the selector switch “5 6 7” (3) to select the device to be heard.

Inserting an equalizer or another device
For external effects on the sound, e. g. an equalizer can be inserted via the jacks INSERTS (18).

1. Connect the input of the device to the jack PRE OUT.
2. Connect the output of the device to the jack AMP IN.
   Note: The signal in the amplifier will be interrupted if merely the jack AMP IN has been connected if the inserted device has not been switched on, or if it is defective or not correctly connected. In this case, the speakers connected will remain mute.

Additional amplifier
If the number of the required speakers is higher than the number admissible for the amplifier, an additional amplifier will be required. Connect the input of the additional amplifier to the jack PRE OUT in the area INSERTS (18). The signal for the additional amplifier will not be affected by the zone attenuators (6).

Switches for chime and siren
For remote activation of the chime, connect a momentary pushbutton switch to the contacts “Remote Chime” (30). For using the siren, connect a switch to the contacts “Remote Siren” (30). To allow activation from several places, it is possible to connect several switches or momentary pushbutton switches in parallel.

Switch for remote activation/deactivation
A separate switch allows remote activation and deactivation of the amplifier. For this purpose, connect an on-off switch to the terminal strip AC POWER REMOTE (26). For remote activation or deactivation, the amplifier must not be switched on with the POWER switch (14).

Adjusting the volume attenuation, the siren and the chime

• Automatic volume attenuation:
  Use the control “Mute Level” (31) to adjust the volume attenuation level (see chapter 6.2) from −25 dB to −35 dB.

  • Siren: Use the control “Siren Level” (32) to adjust the siren volume.
  • Chime: Use the control „Chime Level“ (33) to adjust the chime volume.

Note: To prevent activation of the chime from the PTT microphones connected to the inputs 2 – 4 (34), remove the jumper from the screw terminals “INPUTS Chime On / Off” (30).

1. Switching over between 2-tone chime and 4-tone chime
   A jumper in the amplifier allows selection of 2-tone chime or 4-tone chime.
   WARNING: The chime must be switched over by skilled personnel only. For this purpose, the amplifier must be opened. Always disconnect the mains plug from the socket before opening the amplifier; otherwise, you will risk an electric shock!

2. If an emergency power supply unit is connected, disconnect it from the terminals DC POWER (28) to make sure that the amplifier is definitely out of operation.

3. Unscrew the housing cover of the amplifier.

4. Use the jumper MS 1 on the left PC board at the rear side of the amplifier to adjust:

  * position “2T” = 2-tone chime
  * position “4TONE” = 4-tone chime
4. Screw on the housing cover again.

Power supply and emergency power supply

1. For continued operation of the amplifier after a possible power failure, connect a 24 V emergency power supply unit (e. g. MONACOR PA-24ESP) to the terminals DC POWER ⎓ 24 V (28). For a cable length of up to 4 m, a cable cross section of 5 mm2 is required.
   Note: If the 24 V voltage from the emergency power supply unit is present at the terminals DC POWER ⎓ 24 V, the amplifier cannot be switched off with the switch POWER (14). In case of a mains failure or if it is switched off, it switches automatically to the emergency power supply.

2. Connect the mains cable provided to the mains jack (24) and then to a mains socket (230 V / 50 Hz).
   Even when it is switched off, the amplifier will still consume some power. Therefore disconnect the plug from the mains socket and, if required, disconnect the emergency power supply unit if the amplifier is not used for a longer period.

“Ground / Lift” switch
If there is a ground loop when all devices have been installed (e. g. from the housing of the amplifier via a rack to another housing of a device), humming will occur (audible in particular during music passages of low volume). This ground loop can be interrupted with the “Ground / Lift” switch (29) on the rear panel of the device. For this purpose, set the switch to “Lift”. Humming should stop after that.
On the other hand, the amplifier is not shielded from electric noise fields if the housing is not grounded. In this case, set the switch to “Ground”. In case of doubt, set the switch alternately to find the optimum position.

Operation

When the amplifier is switched off and connected to the supply voltage, the LED “stand by” (11) will light up.

1. Prior to switching on the amplifier for the first time, set all five input controls INPUT-1 to INPUT-4, AUX (8) and the MASTER control (9) to zero.
2. Switch on the amplifier with the POWER switch (14) or with a switch connected to the terminal strip AC POWER REMOTE (26). The LED “stand by” will be extinguished, and the LED “power” (12) will light up.

Adjusting the volume

1. For the time being, set the control INPUT (8) of the signal to be heard at the highest volume to position 7 (e. g. INPUT-1 for emergency announcements in channel 1 of top priority).
2. Set the attenuator ZONE ATTENUATORS (6) of the zone to be provided with the sound of the highest volume to position 5.
3. Make an announcement via the corresponding microphone and adjust the maximum desired volume with the MASTER control (9). However, the LED “clip” of the VU-meter (10) must not light up; otherwise, this will result in overload and distortion of the amplifier. In this case, turn back the MASTER control accordingly. If the desired volume is not reached and the LED “clip” does not yet light up, advance the corresponding control INPUT further.
4. Then, while an announcement is made, also adjust the volume of the other zones with the attenuators (6).
5. Adjust the volume of further microphones and signal sources with the corresponding controls (8). Always set the controls of the unconnected channels to zero.
6. For selecting a device connected to the jacks AUX INPUTS (19), actuate the selector switch “5 6 7” (3). For this purpose, first set the control AUX to zero to prevent switching noise.
7. Adjust the sound with the two controls “Bass” and “Treble” (4). Adjust the sound for an insertion in the compartment (1) with the controls PACK (5).
8. For temporary sound interruption in certain zones, set the corresponding attenuators (6) to “off”.

Automatic volume attenuation

• A signal in channel 1 will take priority over all other signals, i. e. the volume of the other signals will be automatically attenuated if you speak into the microphone of channel 1.
• When the talk button of the microphones PA-5000PTT is pressed, the volume of the AUX channel will be automatically attenuated.
• The input signals will also be attenuated if the siren or the chime is activated.

Chime and alarm siren
The chime can be activated, e. g. prior to an announcement, with the key CHIME (2), with a momentary pushbutton switch connected to the terminal “Remote Chime” (30), and with the talk button of a PTT microphone. The siren can be activated via a switch connected to the terminals “Remote Siren” (30).

Protective Circuit

The amplifier is provided with a protective circuit against overload, overheating and short circuit at the speaker outputs. The power amplifier is ventilated by a fan, the speed of which depends on the temperature of the power amplifier. If the temperature rise is too high despite the ventilation, the amplifier will be muted and the red LED “prot” (13) will light up. In this case, turn the MASTER control (9) to zero, wait until the LED “prot” is extinguished, then switch off the amplifier. Eliminate the fault, e. g.:

1. In case of overload, reduce the number of speakers connected or, if possible, adjust a lower power consumption on the speakers. Use a second amplifier, if required (see chapter 5.5).
2. In case of overheating, provide an improved air circulation.
3. In case of a short circuit at a speaker output, locate the short circuit and eliminate it.

Specifications

All rights reserved by MONACOR ® INTERNATIONAL GmbH & Co. KG. No part of this instruction manual may be reproduced in any form or by any means for any commercial use.

© MONACOR INTERNATIONAL
All rights reserved
A-0111.00.07.04.2024
MONACOR INTERNATIONAL GmbH & Co. KG
Zum Falsch 36, 28307 Bremen
Germany

WWW.MONACOR.COM

Read User Manual Online (PDF format)

Read User Manual Online (PDF format)  >>

Download This Manual (PDF format)

Download this manual  >>