PA1250D - Hi-fi system Monacor - Free user manual and instructions

USER MANUAL PA1250D Monacor

AMP CHECK? OFF OFF ON

1 Display 2 Button MENU To activate one of the setting menus, keep the button pressed for two seconds until EDITING MODE starts flashing on the display. Then either press the knob PUSH / LEVEL (8) to activate menu 1 (fig.3) or press the button MENU again to acti- vate menu 2 (fig. 4). The first line of the menu is selected. To go to the next menu line, briefly press the button MENU. 3 Button SELECT to change the setting in the menu line selected 4 Button ENTER / INFO When the setting menu is activated to save the menu settings and exit the menu When no menu is activated to activate info menu 2 (fig. 6) 5 Button ESC / BUZZER – To exit the menus – If there is an acoustic warning signal in case of a fault, press the button to deactivate the warning signal. 6 Button MASTER RST to reset the master microprocessor 7 LEDs CLIP lights up when the amplifier is over- loaded. Reduce the volume accord- ingly. SIG lights up when a specific signal vol- ume has been reached. ON lights up when the amplifier is switched on. 8 Knob PUSH / LEVEL To adjust the volume, first press the knob for two seconds until VOLUME SETTING ap pears on the display. Then turn the knob to adjust the vol- ume. Finally briefly press the knob to save and lock the volume adjusted. To show the amplifier settings, briefly press the knob. The information is in- serted on the display (fig. 5). Press the button MENU (2) to go to the next line. To exit the information menu, press the button ESC (5). 9 Button CPU RST to reset the second mi- croprocessor

Button OCP RST to reset the protective circuit when OVER CURRENT appears on the display (

11 Button POWER to switch between oper- ation mode (press button briefly) and standby mode (keep button pressed until the display is extinguished) 12 LED STAND-BY: lights up when the am- plifier is in standby mode

To make handling easier, all green screw ter- minals (15, 17, 18, 19) can be disconnected from their plug-in connections.

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

Screw terminal AC PWR REMOTE for a switch to change between operation mode and standby mode via remote control 16 Support for the mains fuse Always replace a blown fuse by one of the same type.

Screw terminal SPEAKER OUTPUT to con- nect the PA speakers

Screw terminal PGM IN for the input signal 19 Screw terminal PRIORITY IN for an input signal taking priority over the signal at the input PGM IN (e. g. for emergency announcements): As soon as a signal is available at the terminal PRIORITY IN, the signal at the terminal PGM IN will be muted. 20 Screw terminal 24 V⎓ for an emergency power supply unit. 2 Safety Notes This unit corresponds to all relevant directives of the EU and is therefore marked with . WARNING The unit uses dangerous mains voltage. Leave servicing to skilled personnel only and do not insert anything into the air vents! Inexpert handling of the unit may result in electric shock. During operation, there is a hazard of con- tact with a dangerous voltage up to 100 V at the speaker terminals (17). Always switch off the amplifier before making or changing any connection.

The unit is suitable for indoor use only. Pro

tect it against dripping water and splash water, high air humidity and heat (admissi- ble ambient temperature range: 0 – 40 °C).

Do not place any vessel filled with liquid on the unit, e. g. a drinking glass.

The heat generated inside the unit must be dissipated by air circulation; never cover the air vents of the housing.

Do not operate the unit and immediately disconnect the mains plug from the socket

if the unit or the mains cable is visibly damaged,

2. if a defect might have occurred after the

unit was dropped or suffered a similar accident,

3. if malfunctions occur.

In any case the unit must be repaired by skilled personnel.

Never pull the mains cable to disconnect the mains plug from the socket, always seize the plug.

For cleaning only use a dry, soft cloth; never use water or chemicals.

No guarantee claims for the unit and no liability for any resulting personal damage or material damage will be accepted if the unit is used for other purposes than orig- inally intended, if it is not correctly con- nected or operated, or if it is not repaired in an expert way. If the unit is to be put out of oper- ation definitively, take it to a local recycling plant for a disposal which is not harmful to the environment. 3 Applications The amplifier PA-1250D with a 250 W RMS output power is specially designed for PA systems. It is equipped with a switch mode power supply unit and a class D power am- plifier and provides an efficiency of more than 90 %. An LC display shows the most important operating parameters and allows to make settings via a menu. 4 Setting up the Amplifier The amplifier is designed for installation into a rack for units of a width of 482 mm (19”) but can also be used as a tabletop unit. In order to ensure sufficient cooling of the amplifier, air must always be able to flow freely through all air vents.

4.1 Rack installation

For rack installation, the amplifier requires a space of 2 RS (2 rack spaces = 89 mm). To prevent the rack from becoming top-heavy, insert the amplifier into the lower section of the rack. The mounting brackets are not suffi- cient for fixing it safely; additionally use lateral rails or a bottom plate to secure the unit. The hot air given off by 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 units in the rack. In case of insufficient heat dissipation, install a ventilation unit into the rack (e. g. DPVEN-03). EnglishEnglish Page9 English 5 Connecting the Amplifier All connections must be made by skilled per- sonnel. Always switch off the amplifier before making any connection! To make handling easier when screwing on the connection cables, all green screw ter- minals (15, 17, 18, 19) can be disconnected from their plug-in connections.

For making announcements and repro- ducing music, a PA preamplifier (e. g. PA-1414MX) is required which allows connection of microphones and audio units (e. g. CD player, radio). Connect the output of the preamplifier to the input PGM IN (18).

For making emergency announcements or other important announcements, the PA-1250D is equipped with the input PRIORITY IN (19). As soon as a line level signal is available at this input, the input PGM IN will be muted so that only the emergency announcement is audible.

Connect the PA speakers to the screw terminal SPEAKER OUTPUT (17). Make sure that the total load of the speakers does not exceed 250 W RMS; otherwise the protective circuit will respond and reduce the volume of the amplifier or mute it (

4) To ensure continued operation of the am-

plifier after mains failure, connect a 24 V emergency power supply unit (e. g. PA- 24ESP) to the screw terminal 24 V⎓ (20).

For remote-controlled activation / deac- tivation, connect a switch to the screw terminal AC PWR REMOTE (15).

For remote control of the amplifier (e. g. via a PC) and for showing the op- erating parameters of the amplifier on a display, an RS-485 interface is provided. For data transmission, the Modbus proto- col is used (

page 26). Connect the PC to the jack RS 485 IN (14). To operate another unit by remote control, connect this unit to the jack RS485 OUT.

7) Finally connect the mains cable provided

to the mains jack (13) and then connect it to a socket (230 V/ 50 Hz). The LED STAND-BY (12) lights up. 6 Operation

Press the button POWER (11) to switch on the amplifier. The LED STAND-BY (12) is extinguished; the LED ON (7) lights up and the display (1) is illuminated. To switch off the amplifier (i. e. to switch the amplifier to the standby mode), keep the button POWER pressed until the display is extin- guished. Alternatively, switch on / off the am- plifier by remote control via a switch con- nected to the screw terminal AC PWR REMOTE (15). When the amplifier has been switched on by remote control, the display shows [REMOTE] beneath the line STATUS. Note: The amplifier can only be switched on / off by remote control when it has not been switched on with the button POWER. To allow for remote-con- trolled activation / deactivation even though the am- plifier has been switched on with the button POWER, open the connected switch and then keep the button POWER pressed until the LED STAND-BY lights up.

2) To adjust the volume, first press the knob

PUSH / LEVEL (8) for two seconds until VOLUME SETTING appears on the dis- play. Then turn the knob to adjust the volume. Finally briefly press the knob to exit the volume setting menu and to save and lock the volume adjusted. The display indicates the volume ad- justed: VOLUME [ 00 ] … [ 99 ] When a specific volume has been reached, the green LED SIG (7) lights up. The red LED CLIP lights up when the amplifier is being overloaded; reduce the volume ac- cordingly.

3) Make all other settings via the menu.

Note: When in a menu, press a button within 30 sec onds; otherwise the menu will be deactivated and any settings you may have made will be dis- carded.

Press the button MENU (2) for two sec- onds until EDITING MODE flashes on the display.

The first menu line BATTERY? is selected. Use the button SELECT (3) to define if the voltage of an emergency power supply unit connected is to be monitored (YES) or not (NO). Note: If you use the unit PA-24ESP from MONACOR for emergency power supply, deactivate monitoring (OFF). Since the 24 V power of the PA-24ESP is only available in case of a mains failure, the PA-1250D would report this as a fault even in normal mains operation. d) To go to the next menu line, press the button MENU; to change the setting, press the button SELECT: H.P.F? to activate / deactivate the high-pass filter (200 Hz) for the input PGM IN (18) AMP SLEEP? With the setting ON, the amplifier will automatically go to sleep (the message AMP Sleeping starts flashing on the display) if the input signal is missing for more than one minute. After four minutes with- out an input signal, the amplifier will change to the standby mode. As soon as a signal is available, the amplifier will be reactivated. AMP CHECK? to activate / deactivate monitoring of the power amplifier. If no input signal is available at the amplifier, the power amplifier will be checked by means of a test signal (the interval of the test signals can be set). If a fault is detected, the display will show the mes- sage AMP FAULT (

Note: It is only possible to select the menu line AMP CHECK when the function AMP SLEEP has been deactivated. The function AMP CHECK is automatically deactivated when the function AMP SLEEP is activated. Interval TIME to set the time in- tervals of the power amplifier checks (½ hour to 24 hours) e) To save the settings and exit the menu, press the button ENTER (4). EDIT- ING save briefly flashes on the dis- play; then the standard display reap- pears (fig. 1). Note: You can exit the setting menu at any time by pressing the button ESC (5). Any settings you may have made will be discarded.

4) If the amplifier is connected to a PC, ac-

tivate the second setting menu to define the unit ID and the baud rate:

Press the button MENU for two seconds until EDITING MODE flashes on the display. b) Press the button MENU again to acti- vate the second setting menu (fig.4).

Press the button MENU to go to the next menu line. Use the button SELECT to define the baud rate.

Press the button ENTER to save the set- tings and exit the menu.

Two info menus can be activated for view- ing the settings (figs. 5 and 6): To activate info menu 1, press the knob PUSH / LEVEL; to activate info menu 2, press the button ENTER / INFO. Info menu 1 also shows the temperature of the heat sink (Tempera- ture ..°C). Press the button MENU to go to the next menu line. To exit a menu, press the button ESC / BUZZER or wait for approx. 30 seconds until the menu auto- matically disappears.

If the amplifier cannot be operated properly anymore, reset the amplifier by means of the following two buttons: MASTER RST (6) to reset the master micro- processor CPU RST (9) to reset the second micro- processor Additionally, the button OCP RST (10) is avail- able which allows you to reset the protec- tive circuit when OVER CURRENT appears on the menu (

chapter 6.2.3, paragraph

“Overload”). IMPORTANT! Use a thin, non-conductive object to press the reset buttons. If the second microprocessor was reset by means of the but- ton CPU RST, the master microprocessor must also be reset by means of the button MASTER RST for the amplifier to work properly.10 English

6.2 Display Messages

The display indicates various operating modes and faults. If there is an acoustic warning sig- nal in case of a fault, press the button BUZZER (5) to deactivate this signal.

Priority InputPriority Input Be Careful.. This message keeps flashing on the display as long as a signal is available at the input PRIOR- ITY IN (19). The input PGM IN (18) is muted. AMP SleepingAMP SleepingBe Careful.. This message is displayed when the input signal is missing for one minute and ON has been set in the line AMP SLEEP? of setting menu1. The amplifier is in the sleep mode. It is switched on again when the button ESC(5) or the knob PUSH / LEVEL (8) is pressed or when the input signal is available again. If the signal is missing for four minutes, the amplifier will change to the standby mode and the LED STAND-BY (12) will flash. The amplifier will change from standby mode to operation mode as soon as an input signal is available or the button POWER (11) is pressed.

AC Line CheckAC Line Check LOW VOLTAGE This message appears when the mains voltage falls below approx. 190 V. In this case, the power amplifier is switched off.

VOLUME STATUS[ .. ] [DC LOW]

If the amplifier is connected to an emergency power supply unit and the mains voltage fails, the amplifier will switch to the emergency power supply. If the setting YES was selected in the line BATTERY? of setting menu1, the display will alternately show [BATT.] and [Normal] beneath the line STATUS.Battery CheckBattery Check LOW VOLTAGE This message appears when the voltage of the emergency power supply unit falls below ap- prox. 21 V and the setting YES was selected in the line BATTERY? of setting menu1. The standard display will reappear after approx. 30seconds or when the button ESC (5) is pressed:

VOLUME STATUS[ .. ] [DC LOW]

The line beneath the line STATUS, how- ever, will alternately show [DC LOW] and [Normal].

SKP-LINE SHORTSKP-LINE SHORTOutput MUTE This message appears when there is a short circuit at the speaker output. The speaker output is muted. OVER CURRENTOVER CURRENTProtection This message appears when the power con- sumption is too high (e. g. speaker output overloaded or fault in the amplifier). The standard display will reappear after approx. 30seconds or when the button ESC (5) is pressed:

VOLUME STATUS[ .. ] [OCP ON]

The line beneath the line STATUS, how- ever, will show [OCP ON]. The protective circuit has switched off the power ampli- fier. To find the fault, disconnect the screw terminal SPEAKER OUTPUT (17) and then press the button OCP RST (10), using a thin, non-conductive object. The power amplifier is switched on again. If no fault indication appears, the fault is due to the speaker cable or the speakers. If the fault indication reap- pears, the amplifier is defective and must be repaired.

OVER TEMPOVER TEMP Limited Output This message appears when the amplifier is overheated (e. g. in case of insufficient heat dissipation). The output power is limited to

of the rated power. The standard display will reappear after approx. 30 seconds or when the button ESC (5) is pressed:

VOLUME STATUS[ .. ] [ LIMIT]

The line beneath the line STATUS, how- ever, will alternately show [LIMIT] and [HEATED]. If the temperature of the heat sink continues to rise, the speaker output will be muted and the following message will appear: OVERTEMP MUTEOVERTEMP MUTEOutput Mute The standard display will reappear after approx. 30 seconds or when the button ESC(5) is pressed:

VOLUME STATUS[ .. ] [ MUTE ]

The line beneath the line STATUS, how- ever, will alternately show [MUTE] and [HEATED]. As soon as the temperature is back to normal, the amplifier returns to the rated output power.

6.2.5 Amplifier fault

AMP FAULTAMP FAULTPlease AMP Check This message appears when the micropro- cessor of the PA-1250D has detected a fault in the power amplifier by means of a test signal. A self-test is performed when the fol- lowing conditions are met: ON is selected in the line AMP CHECK? of the setting menu1

chapter 6) and no input signal is available.

Baud rate Data Frame Parity Code 04h 2R unsigned 16

9600, 19200 bps 1 Start bit, 8 Data bit, 1 Stop bit Non Parity 1 ~ 99 (Device Setting) Bytes Data Mag.R/W UnitAddress Parameter Data HI bit 15 ~ bit 8 Reserved Data LOW bit 7 ~ bit 4 Reserved bit 3 Channel 4 bit 2 Channel 3 bit 1 Channel 2 bit 0 Channel 1 (0=Abence, 1=Presence) Data Type

2. SYSTEM SETTING & VOLUME CHECK

Code 04h 2R unsigned 16

System Status Check Bytes Data Mag.R/W UnitAddress Parameter Channel 1 Data HI bit 15 ~ bit 8 Reserved Data LOW bit 7~ bit 5 Reserved bit 4 Battery MOde bit 3 Sleep Mode bit 2 Mute bit 1 Output Limit bit 0 Power (0= OFF, 1=ON) Data Type

3. SYSTEM SETTING CHECK & VOLUME CHECK

Code 04h 2R unsigned 16

30006 Channel 2 Channel 3 Channel 4

Code 04h 2R unsigned 1630009 System Setting Check Bytes Data Mag.R/W UnitAddress Parameter Channel 1 Data HI AMP Check Interval Time 0 ~ 6 Time Step 0 = 0.5 Hour 1 = 1 Hour 2 = 1.5 Hour 3 = 3 Hour 4 = 6 Hour 5 = 12 Hour 6 = 24 Hour Data LOW bit 7~ bit 4 Reserved bit 3 Sleep Mode (0=OFF, 1= ON) bit 2 AMP Check (0=OFF, 1= ON) bit 1 HPF (0=OFF, 1= ON) bit 0 Battery (0=NON, 1= YES) Data Type 30010 Channel 2 Channel 3 Channel 4

Code 10h 2W unsigned 16

Reading 2 points data from 30000 addresses by Function 04h on digital amp 16. CRC SUM CRC Slave Address Function Starting Addr. Hi Starting Addr. Lo No. of Point Hi CRC LO CRC HINo. of Point Lo Query Read (MASTER) 10 04 00 00 00 02 XX XX Slave Address Function Starting Addr. Hi Starting Addr. Lo No. of Point Hi CRC CRC No. of Point Lo Response 2 points data(4Byte) from 30000 addresses by Function 04h on digital amp 16 Response Read (DIGITAL AMP) 10 04 04 00 00 00 XX XX Slave Address Function Byte Count Byte 3 Byte 2 CRC CRCByte 0

Data Hi Data Lo Response 1 points data by Function 10h on digital amp 16

by MONACOR INTERNATIONAL. All rights reserved. A-1387.99.02.01.2022