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WARNING    

 

When replacing the high current power output fuses, ensure that the supply capacitors are FULLY 
DISCHARGED before inserting the new ones. 

 

If  the  replaced  fuse  blows  again  then  there  is  a  serious  fault  within  the  unit.  Refer  to  a  service 
engineer or contact your dealer. NEVER INCREASE THE RATING OF THE FUSE. 

 

REMOTE CONTROL OPTION 

 

The MC450, MC650, MC750 are internally wired for remote control, which is easily achieved by 
installing the appropriate interface/drive board during the manufacturing process, without any change to 
the amplifiers’ performance. 

 

Description 

 
The system is designed to replicate via Windows all the controls that are available on the front panel of 
the amplifier (except power-on/off). This means that the volume can be turned up and down, the channels 
can be linked/un-linked and muted/un-muted remotely.  
 

Features 

 

 

Up to 128 amplifiers can be ‘daisy-chained’ together from an RS485 port via an RS232-485  
adaptor. 

 

 

Amplifiers can be grouped together and controlled all at the same time within that group. 

 

 

The front panel controls on the amplifiers can be ‘locked out’ so that they can only be controlled 
from the computer. This allows the system to be set up to the client’s requirements and then made 
secure against manual interference. 

 

 

Two levels of security are available on the management control system through the use of 
passwords, which permit a higher level access for the senior manager through one password and 
more limited access at a lower level to a number of other ‘users’. 

 

 

Full Windows software is available on www.download.at/mc2a 

 

Wiring information 

 

The interconnecting cable required is a twisted pair cable for short runs and a screened, low capacitance 
data  cable  for  long  runs. The  connectors  are  9-way  D-type  and  the  wiring  of  this  connector  on  the  rear 
panel complies with the standard two wire RS485 configuration as follows: 

 

 

 

 

 

 

Signal   

      Pin No. 

 

 

 

 

  

 A (+)   

        2 & 8 

 

 

 

 

  

 B (-)   

        3 & 7 

 

 

 

 

 

 

Screen   

           5 

 

 

All the ‘A’s should be joined together and all the ‘B’s joined together. 

 

 

Pins 2 & 8 and 3 & 7 are joined inside the amplifier to ease the ‘daisy chain’ wiring. 

 

 

The cable screen should be terminated at one place only, i.e. PIN 5 of the computer. 

 
 
 
 
 
 

Summary of Contents for MC450

Page 1: ...MC450 MC650 MC750 OPERATING INSTRUCTIONS MC 2 AUDIO Ltd Units 6 7 Kingsgate Heathpark Industrial Estate HONITON Devon EX14 1YG England Tel 0 1404 44633 Fax 0 1404 44660 www mc2 audio co uk ...

Page 2: ...Inputs 5 Outputs 5 Rear panel switches 6 OPERATION Switching on 6 Level controls 6 Mute switches 6 Link switch 6 Level indicator 7 Limiters 7 Temperature control 7 Fault indicators 8 2 ohm LED 8 INTERNAL CONFIGURATION SWITCHES 8 FAULTS FUSES 8 REMOTE CONTROL OPTION 9 REMOTE CONTROL SET UP INSTRUCTIONS 10 ...

Page 3: ... ohms Dimensions mm all 2U 88x482x381 88x480x410 88x480x410 Weight 20 4 kgs 22 kgs 22 kgs Power requirement 230 VAC 230 VAC 230 VAC 7 0 amps max 9 0 amps max 10 0 amps max or 120 VAC 120 VAC 120 VAC 14 0 amps max 18 0 amps max 20 0 amps max Product compliance to EC Directives This product conforms to the relevant Directives Regulations and Standards for electronic and associated apparatus The equi...

Page 4: ...or safety reasons THE EARTH LEAD SHOULD NOT BE DISCONNECTED IN ANY CIRCUMSTANCE If ground loops are encountered consult the section on input connections later in this manual TO PREVENT THE LIKELIHOOD OF SHOCK OR FIRE HAZARD DO NOT EXPOSE THE UNIT TO RAIN OR MOISTURE TO AVOID ELECTRICAL SHOCK DO NOT REMOVE COVERS REFER ALL SERVICING TO QUALIFIED PERSONNEL INSTALLATION MECHANICAL To ensure that this...

Page 5: ...N1 is connected directly to the chassis mains earth If ground loops mains hum are encountered remove the screen connection from the other end of the cable and leave it open circuit If problems persist consult your dealer supplier DO NOT TAMPER WITH OR ALTER ANY GROUND EARTH CONNECTIONS INSIDE THE AMPLIFIER BRIDGED OPERATION In Bridged mode input A is fed to both channels Channel B will be out of p...

Page 6: ...et PANEL CONTROLS AND INDICATORS Level controls These are continuous rotary encoders which provide fine adjustment 3 turns from min to max When adjusted the level indicators change to level control position indicators and thus the height of the LED column shows the level position After a second or so the LED column changes back to monitor the signal level This function can be changed internally vi...

Page 7: ...evel controls are manually turned back up or until the amplifier is switched off NOTE All levels are referenced to the clipping point of the amplifier and not an actual output voltage or power level If the mains power drops or increases then the limit threshold will also change thus maintaining maximum output level Temperature Control If the heat sinks get excessively hot the controller will autom...

Page 8: ...columns will always show the signal level and will not change to show the level control position when the level controls are adjusted Sw 4 5 These select the threshold level as follows Sw4 Sw5 ON ON Just below clipping point ON OFF 1dB below clipping point OFF ON 2dB below clipping point OFF OFF 3dB below clipping point Sw 6 Sw 7 operate together they determine the operating mode and release time ...

Page 9: ...gether and controlled all at the same time within that group The front panel controls on the amplifiers can be locked out so that they can only be controlled from the computer This allows the system to be set up to the client s requirements and then made secure against manual interference Two levels of security are available on the management control system through the use of passwords which permi...

Page 10: ...either end of the cable and connected as follows PIN 2 hot positive PIN 3 cold PIN 5 screen Configuring the PC 1 Launch Amplifier Explorer program can be downloaded from www mc2 mc2 audio co uk 2 Click on the Tools menu and select Serial link setup Then SET OPERATING SYSTEM e g WIN98 SET COM PORT NUMBER SET PORT ADDRESS This happens automatically Set up is now complete Each amplifier has its own i...

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