6
I N S T A L L A T I O N P O W E R S U P P L Y A N D P H O N E S
Fig. 21
Fig.23
Fig. 22
Fig. 23
Art.
887D - 887D/A
Art.
6220/A
DESCRIPTION OF INTERPHONES
"Digit 2 Wires" interphones Art. 887D, 887D/A form part of the 8870
series, while interphone Art. 6220/A belongs to the PETRARCA series.
The 8870 series Digit 2 Wires interphone is supplied in the version with
one lock release pushbutton and a dedicated call speaker. Call volume
can be decreased by shifting the speaker connector from position A+ to
position A-.
The interphones are prearranged for wall mounting and/or desktop
installation (interphones Art. 887D, 887D/A are wall-mounting only, while
interphone Art. 6220/A is suitable for wall mounting or, after fitting a spe-
cific support base, desktop installation).
N.B.:
When a call is made from the entrance panel the voice signal is
inhibited until the end of the sequence of ringtones or until the handset
is picked up between one ringtone and another. Programming of the call
code associated with the interphone is performed by means of 8 jumpers
that are used to distinguish a given interphone from the other interpho-
nes in the system.
Installation instructions
Fig. 21
- Open the interphone and separate the cover from the base by
prising the bottom side of the cover.
Fig. 22
- To separate the base of the interphone from the cover, insert a
crosshead screwdriver in the central location and turn it until the cover
clicks off.
Fig. 23
- Fix the interphone to a rectangular, vertical wall-box previously
installed in a wall recess by means of the 2 screws supplied, or fix the
screws directly to the wall using ø5mm expansion plugs. Make the con-
nections to the terminals. The interphone should be fixed so that the top
is at a height of about 1.5 m from the floor.
POWER SUPPLY UNIT INSTALLATION
Before connecting the system use a normal tester to check for possible
open circuits or short circuits of the wires; it is good practice to route the
entry system wires through specific electrical conduits separately from
mains power wires and other sources of disturbance.
Transformer Art 832A must be installed in a dry and clean location well
clear of heat sources. Ensure the transformer installation location is easi-
ly accessible in order to facilitate checking and set-up procedures.
Secure the transformer to the wall by means of the supplied screw
anchors, or install it in a specific panel with top-hat section DIN rail.
DESCRIPTION OF POWER SUPPLY UNIT Art. 832A
The power supply unit utilised for "Digit 2 Wires" series systems is tran-
sformer Art. 832A. The transformer supplies one entrance panel,
pushbutton illumination system, door lock and 200 interphones. A high
consumption lock or timer-controlled lock calls for the use of a second
transformer Art. 832/030 and relay Art. 170/001 to be connected to the
system according to diagram SI518. The transformer is equipped with a
19Vac low voltage output with maximum power rating of 30VA; the tran-
sformer features thermal and short-circuit protection by means of a PTC
(type SIEMENS C850). The transformer requires a power supply of 230V
(+6%, -10%) 50-60Hz. Alternative voltages are possible on demand.
N.B.:
if the system is equipped with two or three entrance panels, install
a transformer for each entrance panel, keeping the wires connecting
each transformer to the respective entrance panel separate from the
other wires.
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