Installing Optional Boards; Installing The Sb 3320 "Fault Detector" Board; Installing The Lb 3340 "Digital Alc" Board; Specifications - rcf RB 3300 Manual De Uso

INSTALLING OPTIONAL BOARDS

CAUTION
• To avoid breakdowns, do not connect or disconnect the optional LB 3340 or SB 3320 boards to/from the RB 3300 back-amplifier
board with its power supply on; first remove the power supply voltages from the RB 3300 board, then connect/disconnect the optional
boards, and subsequently re-supply the back-amplifier board.

INSTALLING THE SB 3320 "FAULT DETECTOR" BOARD

1) The "JP2" jumper on the RB 3300 board (ref. 4 – Fig. 1, page 72) is used to activate operation of the optional SB 3320 FAULT DETEC-
TOR board. This jumper can have one of two different positions, and short circuits two of the three terminals on the board.
"JP2" JUMPER POSITION
Short circuit of terminals 1 – 2
Short circuit of terminals 2 – 3
2) Using the flat 16-wire cable provided with the SB 3320 FAULT DETECTOR board, connect the board to the "CN1" connector (ref. 3 – Fig.
1, page 72) of the RB 3300 back-amplifier board.
IMPORTANT NOTE
• In order to use the functions of the SB 3320 FAULT DETECTOR board, the "JP2" jumper must be used to short circuit terminals "2"
and "3" together.

INSTALLING THE LB 3340 "DIGITAL ALC" BOARD

1) The "JP1" jumper on the RB 3300 board (ref. 27 – Fig. 1, page 72) is used to activate operation of the optional LB 3340 DIGITAL ALC
board. This jumper can have one of two different positions, and short circuits two of the three terminals on the board.
"JP1" JUMPER POSITION
Short circuit of terminals 1 – 2
Short circuit of terminals 2 – 3
2) Using the flat 16-wire cable provided with the LB 3340 DIGITAL ALC board, connect the board to the "CN2" connector (ref. 12 – Fig. 1,
page 72) of the RB 3300 back-amplifier board.
IMPORTANT NOTE
• In order to use the functions of the LB 3340 DIGITAL ALC board, the "JP1" jumper must be used to short circuit terminals "2" and "3"
together.

SPECIFICATIONS

No. of amplifiers that can be controlled
"AUDIO IN" input – sensitivity / input max.
signal / impedance
"AUDIO OUT" output - voltage / impedance
"MONITOR BUS OUT" output - voltage / imped. Balanced – 775 mV / < 600 ohm
Speaker lines that can be monitored
Power supply / Absorption
Absorption with LB 3340 and SB 3320 boards
(standard position)
(standard position)
1
Balanced – 775 mV / > 7.5 Vrms / 47 kohm
Balanced – 775 mV / < 600 ohm
25 V, 50 V, 70 V, 100 V lines
5 Vdc / 35 mA (150 mA with RS 485 line short-circuited)
12 Vdc / 30 mA
24 Vdc / 65 mA
See specifications enclosed at the boards
FUNCTION
SB 3320 board operation disactivated.
SB 3320 board operation activated.
FUNCTION
LB 3340 board operation disactivated.
LB 3340 board operation activated.
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