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is a multiple volume control for 50, 70 and 100 V con-

stant-voltage lines, suitable for rack mounting (1 modular unit). It con-

sists of 6 inductive attenuators with 11 positions each (10 + Off), and

each of which can bear a maximum load of 50 W. The six output lines

(zones) can be split up into two groups of three each so as to drive

them with one amplifier or two separate ones. Each attenuator has a

bypass relay for sending out announcements and messages without

any attenuation. Each relay requires a 24 VDC power supply, with ab-

sorption of 10 mA. The rear terminal blocks are of the removable type

with slide-type fixtures.

AC950/20 • Ceramic terminal block with thermal fuse (kit containing 20 off)

P8056 • 6-zone multiple attenuator


Trasformer 50-70-100 V, 4-8 Ohm, 6-3-1,5 W


Trasformer 50-70-100 V, 4-8 Ohm, 4-2-1 W


Trasformer 50-70-100 V, 8 Ohm, 80-40-20 W

Constant voltage line transformers



Attenuator units and output lines



2 (IN A for outputs 1-2-3, IN B for outputs 4-5-6)

Attenuator rated power

50 W

Attenuation positions

10 + off

Override command

24 Vdc

19" rack mounting (modular units)

Direct (1 U)

Dimensions (W x H x D)

482 x 44 x 150 mm


4 kg

functional features

• Six 50-W attenuators

• 6 output lines separable into two groups of three each

• 2 inputs for constant-voltage lines (one for outputs 1, 2 and 3 and

the other for outputs 4, 5 and 6)

• One bypass relay for each attenuator

• Can be mounted in a standard 19” rack (height: 1 U)

Kit for connecting speaker units to bring the installation in line with the

standards for voice alarms in those cases in which the whole loudspe-

aker circuit needs to be safeguarded when one or more speaker units

are damaged by fire.

The kit consists of 20 ceramic terminal blocks for connections, able

to withstand temperatures exceeding 650°C and fitted with 150°C

thermal fuses for cutting the loudspeaker off from the main line in the

event of fire.