User manual ELECTRO-VOICE DPA 4411

[. . . ] OWNER'S MANUAL POWER AMPLIFIER DPA 4411 Features Power amplifier with 4x100 W output power capacity according to IEC 283-3 19" - rack size (3 HU) unit that provides the following functions: · · · · · · · · · · · · · · · · · · · · Mains operation 115/230 V AC and operation with emergency power supply of 24 V DC Output transformers for balanced, floating 100 V loudspeaker networks: 70 V, 50 V or 4 ohms for low-impedance operation can be selected All outputs are protected against idling and short-circuit Integrated Remote Module for control and monitoring using the PROMATRIX Manager DPM 4000 Electronic level controls, electronically balanced inputs and electronically balanced MONITOR output Input transformer for balanced, floating inputs can be retrofitted Monitor output transformer for balanced, floating MONITOR output can be retrofitted Routing switch for parallel operation of the amplifier's inputs Integrated Standby Power Supply Mains function switch - POWER Ground lift switch Remote-Start function for mains and battery operation with inrush current limiter protection Power-on noise attenuation Status-LED indicators: operation (READY), STANDBY, thermal overload (PROTECT) and GROUND FAULT at the power outputs Fault notification according to DIN EN 60849 via the PROMATRIX Manager DPM 4000 TEST-switch for systems with average-switching or GROUND FAULT RESET LED meters with a range from -13 dB to 0 dB plus CLIP indication Mains voltage selector switch 115/230 V AC Active, temperature-controlled ventilation Modules for pilot tone surveillance and ground fault surveillance according to DIN VDE 0800 are optionally available 19 IMPORTANT SAFETY INSTRUCTIONS The lightning flash with arrowhead symbol, within an equilateral triangle is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintance (servicing) instructions in the literature accompanying the appliance. 1. Do not block any of the ventilation openings. Install in accordance with the manufactures instructions. [. . . ] The PROMATRIX Manager DPM 4000 (see PROMATRIX handbook) offers connection for monitor amplifiers; which can be set to input-monitoring or output-monitoring for the desired amplifier channel. 6. Integrated Remote Module The integrated remote module of the power amplifier DPA 4411 provides the following functions: · · · · input levels of INPUT 1 to INPUT 4 can be set via programmable audio level controls reading level values of the audio level controls setting level offsets 1 to 4 via virtual controllers mute function 1 to 4 (via level controls) 26 · mains operation remote control ON/OFF · battery operation remote control ON/OFF · monitoring and fault message transmission via the PROMATRIX Manager DPM 4000; in accordance to DIN EN 60849 standard - thermal overload of the mains transformer - thermal overload of power output stages 1 to 4 - monitoring of the functioning of the power output stages 1 to 4 via pilot tone signal (optional, only with NRS 90206 installed) - ground fault detection for loudspeaker lines 1 to 4 (optional, only with NRS 90207 installed) - measuring of input and output level peaks 1 to 4 - measuring of output voltages / levels of the power outputs 1 to 4 - measuring of output currents of the power outputs 1 to 4 - monitoring of connected loads 1 to 4 via current-voltage-measuring - recognition of amplifier type including user-definable name - reading of software revision of the remote module - reading of error flags - reading of the output configuration - recognition of extensions NRS 90206 and NRS 90207 · switching the input monitor / output monitor 1 to 4 to the monitor bus · pilot tone signal ON/OFF (optional, only with NRS 90206 installed) · ground fault error flags reset Note Prior to the first operation of the amplifier DPA 4411, you have to set the amplifier address using the two Hexadecimal Code switches ADDRESS (18) (refer to the PROMATRIX handbook) and using a waterproof marker pen mark the setting in the ADDRESS label field on the rear panel of the appliance. By sending the corresponding command via the serial port REMOTE CONTROL (13) of the remote module, this function is activated from the PROMATRIX Manager DPM 4000 (see PROMATRIX handbook). Indicators And Fault Notification 7. 1 STANDBY Indicator When correctly connected and with mains voltage and/or battery voltage present, the green STANDBY indicator (4) lights. 7. 2 READY Indicator The power amplifier DPA 4411 provides a power-on delay of approximately 3 s to prevent switch clicks from becoming audible. If after this period of time no faulty condition has been detected, the green READY indicator (7) lights and the mute-relays pull. When thermal overload of the mains transformer or of one of the power output stages is detected, the corresponding green READY indicator (7) will not light and the according mute-relay drops. If, with the NRS 90206 extension installed the pilot-threshold (see paragraph 9. 1) is declined, the corresponding green READY indicator (7) goes out but the amplifier stays operational and a fault message gets transmitted to the PROMATRIX Manager DPM 4000. 7. 3 PROTECT Indicator In case of thermal overload of the mains transformer or of a power output stage is detected, the red PROTECT indicator (5) will light. During thermal overload of the mains transformer, all mute-relays drop while during thermal overload of a power output stage, only the according mute-relay drops. After the mains transformer or the power amplifier have regained their normal temperature, the red PROTECT indicator (5) automatically goes out and the appliance recovers normal operation mode. The faulty condition could have been caused by either overload, too high environmental temperature, or by an error in the ventilation system. A fault-message is transmitted to the PROMATRIX Manager DPM 4000. 27 7. 4 GROUND FAULT Indicator If, with built-in NRS 90207 a ground fault condition at one of the power outputs occurs, the corresponding red GROUND FAULT indicator (6) lights and a fault-message is transmitted to the PROMATRIX Manager DPM 4000. The power amplifier keeps up normal operation during the occurrence of this fault-type. After solving the problem, the GROUND FAULT indicator (6) can be reset by pressing the TEST button (3) or by sending the corresponding command via the serial port of the PROMATRIX Manager DPM 4000 (see PROMATRIX handbook) (see paragraph 9. 2). 7. 5 Meter Instruments And CLIP Indicators The green LED-indicator -13 dB and 0 dB (1) as well as the red LED-indicator CLIP (2) allow the precise monitoring of output levels, providing the possibility to securely prevent distortion and clipping that could lead to damaging the connected loudspeaker systems. - When during program peaks the red CLIP-LED (2) lights briefly, the maximum distortion-free output is gained. - Whenever the CLIP-LED (2) lights continuously, the amplifier is driven into overdrive and the input level should be reduced. - Overload or short-circuit at the output is the cause for the green LED-indicator (1) to be out or only briefly lit while at the same time the red CLIP-LED (2) blinks. In that case, please check the impedance of the connected load. Caution During normal operation, the red CLIP-LED (2) should hardly light and if, than only very briefly ! 7. 6 STATUS Indicator The yellow STATUS-LED (14) that is located on the rear of the appliance lights briefly during normal operation when the DPM 4000 addresses a query to the amplifier. For further information, please refer to the PROMATRIX handbook. Switching The Output Voltage (refer to qualified service personnel only!) The DPA 4411 offers output voltages of either 20 V, 50 V, 70 V or 100 V. [. . . ] Note For trouble-free operation of the appliance, the maximum environmental temperature of +40 °C is not to be exceeded. 32 11. Ground Lift Switch CIRCUIT TO CHASSIS SWITCH Using the ground lift switch CIRCUIT TO CHASSIS SWITCH (22) lets you separate the audio signal ground from the enclosure ground (safety earthing). This helps to solve problems with hum or noise without jeopardizing safety standards. If several units with ground lift switch are installed in a common enclosure or rack system, it is recommended to set the ground lift switches of all devices but one to "ungrounded". [. . . ]