Safety First - rcf SB 3320 Instrucciones De Uso

ENGLISH

SAFETY FIRST!

Before installing and using this product, please read this instruction manual carefully and keep it on hand for future reference.
Follow all the instructions to the letter.
IMPORTANT NOTES: This product has been designed for installation only by qualified personnel having the technical
know-how and experience or specific instructions to ensure correct execution of all the operations involved and to prevent any
risk to personal safety. There are numerous factors that must be taken into consideration when installing a professional sound
system, and we therefore strongly recommend that you have this product installed only by professional installers or specialized
firms.
1. Attention to the precautions – Always follow the precautions provided on this product and in the instruction manual.
2. Foreign bodies and liquids – Be careful not to allow any foreign bodies or liquids to come into contact with this product.
3. Technical service – The user should never attempt to make any repairs on this product unless otherwise indicated in the
instruction manual. All repairs should be made by qualified service technicians.
4. Installation – Do not install this product in any way that is not provided for in the instruction manual
5. Respect the safety standards – The entire sound system must be created in compliance with the current standards and
laws regarding electrical systems.
6. Specifications – When installing and using this product, keep in mind the technical specifications indicated in the dedica-
ted section of this instruction manual.
7. Accessories – Install and use this product only with the accessories specified by the manufacturer or supplied with the
product.
CAUTION
• To prevent malfunctions, never expose the product to rain or humidity.
DESCRIPTION
The SB 3320 is an optional electronic board that can be coupled with an RB 3300 back-amplifier board in order to use the
LINE FAULT, PA FAULT and FIRE-BREAK functions in the RX 3000 sound system.
The LINE FAULT function is used for controlling the impedance of the speaker line driven by the RB 3300 board. Any malfunc-
tion that causes a significant variation in the line impedance activates the respective alarm, which is transmitted to the CP
3100 control unit. The malfunctions that can be detected are:
• short circuit between the two conductors of the speaker line,
• interruption of the speaker line,
• short circuit between the speaker line and the earth circuit.
The PA FAULT function is used for checking the correct operation of the amplifier controlled by the RB 3300 board by picking
up the signal on the amplifier speaker output.
Any malfunction of the amplifier that causes a significant decrease in the power transmitted activates the respective alarm,
which is transmitted to the CP 3100 control unit. By programming the control unit in a particular way, a backup amplifier can
be activated in the place of the amplifier in alarm status.
The FIRE-BREAK function makes it possible to drive the amplifier controlled by the RB 3300 board with an emergency signal
coming from a source not connected to the RX 3000 system, interrupting the normal transmission of the signal coming
from the audio matrix. This guarantees that a message with absolute priority (e.g. fire alarm) can be transmitted, even in the
event of a fault on a component of the RX 3000 system (e.g. OB 3230 AUDIO OUTPUT board).
To ensure the maximum certainty of intervention, the "fire-break" function acts exclusively at the hardware level.
All the functions of the board can also be used when background music is being played.
IMPORTANT NOTE
• When the SB 3320 FAULT DETECTOR board is coupled with an RB 3300 board controlling a backup amplifier, it is indis-
pensable to disable the "LINE FAULT" function to prevent involuntary activation of the respective alarm.
NOTE
• The LINE FAULT and PA FAULT functions alarms are activated and transmitted to the CP3100 control unit only them the
alarm conditions persist continuously for at least ten seconds.
DEVICES (fig. 1 – page 32)
1) "DL1 - LINE SHORT" indicator light
This LED lights up to indicate an alarm caused by a short circuit between the two conductors of the speaker line. The
alarm is transmitted to the CP 3100 control unit (LINE FAULT alarm).
2) "DL2 - NORMAL" indicator light
This LED must be normally on, and indicates that the speaker line is operating in normal conditions.
3) "DL3 - LINE OPEN" indicator light
This LED lights up to indicate an alarm caused by an interruption of the speaker line. The alarm is transmitted to the CP
3100 control unit (LINE FAULT alarm).
4) "M5" terminal strip
Used for the output of the audio signal for speakers (e.g. 25 V, 50 V, 70 V, 100 V signal).
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