Dynacord Power Amplifier DPA 4120 Owner's Manual page 26

Contents
Performance Features ................................................................................................................................. 23
Indicators, controls and connections ........................................................................................................... 25
1. Utilization ..................................................................................................................................................... 27
2. Installation ................................................................................................................................................... 27
3. Before the first operation.............................................................................................................................. 27
3.1 Mains operation ................................................................................................................................... 27
3.2 Battery operation 24V DC ..................................................................................................................... 28
4. INPUT .......................................................................................................................................................... 28
5. Outputs......................................................................................................................................................... 29
5.1 POWER OUTPUT................................................................................................................................. 29
5.2 POWER OUTPUT for 100V (70V or 50V) loudspeaker systems ......................................................... 29
5.3 SINGLE CALL and obligatory reception relays OVERRIDE BYPASS ................................................. 29
5.4 POWER OUTPUT for low impedance loudspeaker systems ............................................................... 29
5.5 MONITOR output .................................................................................................................................. 30
5.6 REMOTE CONTROL connector (only NRS 90225) ............................................................................. 30
6. Indicators ..................................................................................................................................................... 30
6.1 STANDBY indicator .............................................................................................................................. 30
6.2 READY indicator ................................................................................................................................... 30
6.3 PROTECT indicator .............................................................................................................................. 30
6.4 GROUND FAULT indicator................................................................................................................... 30
6.5 Aussteuerungskontrolle und CLIP-Anzeige.......................................................................................... 31
7. Switching the output voltage ........................................................................................................................ 31
8. Enhanced application field ........................................................................................................................... 32
8.1 General input module NRS 90225........................................................................................................ 32
8.2 Remote module NRS 90222................................................................................................................. 32
8.3 NRS 90208 input transformer for the floating, balanced input ............................................................. 33
8.4 NRS 90227 output transformer for the floating, balanced monitor output............................................ 33
8.5 NRS 90224 pilot tone and ground fault surveillance ............................................................................ 35
8.5.1 Pilot tone surveillance ................................................................................................................. 35
8.5.2 Ground fault surveillance ............................................................................................................ 35
9. 19"-case and 19"-rack shelf system installation .......................................................................................... 38
10. Ground lift switch CIRCUIT TO CHASSIS SWITCH ................................................................................. 38
11. Fuses ........................................................................................................................................................... 38
11.1 Fuses in the DPA ................................................................................................................................ 38
11.2 Fuses in the DPA ................................................................................................................................ 38
12. Power amplifier specifications ..................................................................................................................... 42
12.1 DPA 4120 power amplifier 200 W....................................................................................................... 42
12.2 DPA 4140 power amplifier 400 W....................................................................................................... 43
13. Extension specifications............................................................................................................................... 44
13.1 NRS 90225 general input module....................................................................................................... 44
13.2 NRS 90222 remote module ................................................................................................................ 44
13.3 NRS 90208 input transformer for floating, balanced input ................................................................. 44
13.4 NRS 90227 output transformer for floating, balanced monitor output................................................ 44
13.5 NRS 90224 pilot tone and ground fault surveillance .......................................................................... 44
14. Block diagrams ............................................................................................................................................ 67
14.1 Power amplifiers DPA 4120 / DPA 4140 ............................................................................................. 67
14.2 NRS 90225 general input module....................................................................................................... 68
14.3 NRS 90222 remote module ................................................................................................................ 69
14.4 NRS 90224 pilot tone and ground fault surveillance .......................................................................... 70
15. Warranty....................................................................................................................................................... 72
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