Board Operation; Managing The Board In The Rx 3000 System - rcf RB 3300 Manual De Uso

IMPORTANT NOTES
• Alarms are transmitted to the control unit only when the RB 3300 back-amplifier board causes the activation and use of the amplifier
under its control (A.C.U. switched on). When the RB 3300 back-amplifier board switches off the amplifier under its control (A.C.U. swit-
ched off) no alarms are transmitted.
• When the "ALM" light belongs to a "BACKUP" A.C.U., it flashes under normal conditions because the unit is switched off.
• During a "fire-break" event, the alarm indication is temporarily disactivated. At the end of the "fire-break" event, if the alarms are still
active they are signalled again.
10) "COM" indicator light
The status of the LED provides the following indications:
• LED off: indicates an alarm caused by the 5 Vdc power supply voltage being too low or absent.
• LED flashing intermittently: indicates that the RB 3300 board is communicating normally with the CP 3100 control unit.
• LED on in continuous mode: indicates an alarm caused by the absence of communication between the RB 3300 board and the CP
3100 control unit.
IMPORTANT NOTE
• When the LED is on in continuous mode, it returns to flashing status as soon as communication has been re-established between the
RB 3300 board and the CP 3100 control unit.
11) "SW1" microswitches
Used for setting the address to be assigned to the board; one of the microswitches is also used for resetting board operation.
12) "CN2" connector
Used for connecting the optional LB 3340 DIGITAL ALC board.
13) "M1" terminal strip
Used for the input of the low level signal coming from the audio source (generally an output of the OB 3230 AUDIO OUTPUT board of
the audio matrix of the system).
14) "M4" terminal strip
Used for the output of the balanced low level audio signal used for driving the amplifier controlled by the board.
15) "M8" terminal strip
Used for the output of the "backup PA bus" line (see the section "BOARD OPERATION").
16) "M11" terminal strip
Used for the input of the audio signal for speakers which comes from the output of the amplifier being controlled by the board (see the
section "BOARD OPERATION").
17) "JP4" jumper
Used for selecting the sensitivity of the circuit for amplifier monitoring according to the output voltage of the amplifier (25 V – 50 V – 70
V – 100 V output).
18) "JP5" and "JP6" jumpers
Used for selecting the signal to be monitored by means of the CP 3100 control unit. You can select the speaker output signal of the am-
plifier being controlled (normal selection), or the signal of the microphones connected to the optional DIGITAL ALC LB 3340 board (se-
lection used for technical tests).
19) "M13" terminal strip
Used for the output of the "monitor bus" line (see the section "BOARD OPERATION").
20) "M2" terminal strip
Used for supplying the board with the voltages 5 Vdc, 12 Vdc, 24 Vdc.
21) "M3" terminal strip
Used for the connection of the RS 485 serial line which enables communication between the RB 3300 board and the CP 3100 control
unit.
22) "M5" terminal strip
Used for connection with the auxiliary alarm contact of the amplifier to be controlled, which switches to closed when a protection cir-
cuit intervenes or when the unit functions abnormally (e.g. operation in overload).
23) Unusable terminal strip
24) "JP3" jumper
Used for terminating the RS 485 line (see the section "TERMINATING THE SERIAL LINE").
25) "M7" terminal strip
Used for the output of the "audio bus" line (see the section "BOARD OPERATION").
26) "M6" terminal strip
Used for the input of the "audio bus" line (see the section "BOARD OPERATION").
27) "JP1" jumper
Used for enabling/disabling operation of the LB 3340 DIGITAL ALC board.

BOARD OPERATION

MANAGING THE BOARD IN THE RX 3000 SYSTEM

The RB 3300 back-amplifier boards are identified in the various menus of the CP 3100 control unit with the abbreviation A.C.U. (Amplifier Con-
trol Unit). Using a special menu on the control unit, the boards can be configured and programmed with the operating modes described in the
section below.
Each A.C.U. present in the system is distinguished in the various menus of the CP 3100 control unit by means of an IDENTIFICATION NUM-
BER from 1 to 120 (maximum number of A.C.U.s handled by the system), which depends on the address assigned to it during installation.
Depending on the function of the amplifier being controlled by the back-amplifier board, the A.C.U. can be one of two types:
• "NORMAL" – The A.C.U. whose function is to control a primary amplifier, normally the one dedicated to sound diffusion in a certain audio
zone.
• "BACKUP" – The A.C.U. whose function is to control a backup amplifier, which is normally used to replace a primary amplifier, for exam-
ple, in the event of a breakdown. When two or more backup amplifiers are included in the system for multiple primary am-
plifiers, the first backup amplifier has the function of replacing any primary amplifier following a breakdown. The second
backup amplifier has the function of replacing only the first backup in the event that breaks down as well, and cannot
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