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POWER SUPPLIES
The power supply is not provided with fuses,
but it is protected against overloading or short-
circuiting by a heat sensor (thermoprotector),
to restore power, it is necessary to cut off the
mains voltage for about one minute. Reconnect
power after having repaired the fault.
Do not obstruct the openings or the ventilation
or heat ejection slots to allow the equipment to
operate correctly. The power supply can be
installed on DIN rail or screwed to the wall.
All the power supplies described in this manual
replace the corresponding ones with similar
initials. E.g.: PRS220 replaces PRS220D,
PRS220K, etc. PRS226 replaces PRS226D
and PRS226K.
All power supplies can provide power for a
maximum of 6 24V-3W lamps for illuminating
push-button panel name plates. For more than
6 lamps, PRS210 transformer should be
installed.
General technical data
Input voltage:
127Vac or 220-230Vac
Working temperature: 0°÷+50°C
Maximum of humidity: 90%RH
Warning
All power supplies in this manual can work
either 127Vac or 220-230Vac.
Check carefully the right connection.
127V
127Vac
220-230Vac
0
127V
230V
0
PRS 210. TRANSFORMER.
Used to power 13Vac devices; MD100, MD200,
RP100, RP200, UP series amplified external
door stations, accessories, additional door
locks, name plate light, etc.
Technical data
Power:
15VA
Output voltage: 13Vac
Maximum load: 0.7A
Maximum of intermittent load: 1A
Housing:
DIN 3 modules A
Weight:
0.42 Kg. (0.93lb)
Approved by:
VDE according to the Safety
Standard EN60065
54
89
2
1
/
"
3
1
/
8
"
2
PRS 220. STABILIZED POWER SUPPLY.
It is provided to supply 4+1 intercom systems
(electric door lock, name plate lamps, electric
door-speakers, amplifier, etc.)
Technical data
Power:
15VA
Housing:
DIN 4 modules A
Weight:
0.45 Kg. (0.99lb)
Approved by: VDE (according to the Safety
Standard EN60065)
Output terminals
- Ground
+ Audio line power supply 6Vdc-0.1A
Power supply 13Vac for:
- name plate lamps, exchangers
(continuous load 0.6A)
- electric door lock and bells (intermittent load
1A)
PRS226. STABILIZED POWER SUPPLY/
SWITCHER.
It is able to supply intercommunicating intercom
systems and to switch over automatically audio
connection of the door station and of the
intercommunicating service to the intercoms.
Technical data
Power:
18VA
Housing:
DIN 6 modules A
Weight:
0.5 Kg. (1.1lb)
Approved by: VDE (according to the Safety
230V
Standard EN60065)
Output terminals
-
Ground
+ Audio line power supply 8Vdc-0.1A
127V
230V
X Power supply for auxiliary services 12Vdc-
0.2A
Power supply 13Vac for:
- name plate lamps, exchangers (continuous
load 0.6A)
- electric door lock and bells (intermittent load
1A)
7 Power supply 13Vac for electric door lock and
bells (intermittent load 1A)
A Output for call from push-button panel 13Vac-
0.15A
G Audio line receiver from intercoms
2 Audio line transmitter to intercoms
D Audio line transmitter to electric door speaker
C+ Audio line receiver from electric door speaker
PRS226E. STABILIZED POWER SUPPLY/
SWITCHER.
As above, with the following additional termi-
nals and the modification of terminal 7.
7 Electronic bell output for intercommunications
Y Electronic bell output for push-button panel
65
2
9
/
"
16
70
PRS210
/
2
3
"
4
65
2
9
/
"
16
89
PRS220
3
1
/
"
2
24
(MT12 - Gb2004)
9 Electronic call input for switching over multi-
way installations
4 Relay switching common terminal controlled
from entrance 9
4a NC relay switching controlled from entrance 9
4b NA relay switching controlled from entrance 9
PRS 240. STABILIZED POWER SUPPLY
WITH ELECTRONIC RINGING GENERA-
TOR.
Power supply with modulated electronic ring-
ing generator for calls. It supplies the voltages
needed for the correct operation of intercom
systems.
Technical data
Power:
18VA
Ringing frequency: 450Hz modulated
Housing:
DIN 6 modules A
Weight:
0.5 Kg. (1.1lb)
Approved by:
VDE according to the Safety
Standard EN60065
Output terminals
-
Ground
+ Audio line power supply 7.2Vdc-0.1A
X Power supply for aux. services 12Vdc-0.2A
Power supply 13Vac for:
- name plate lamps (continuous load 0.6A)
- electric door lock and bells (intermittent load
1A)
C+ Modulated electronic call output 12Vpp-0.25A
7 Continuous electronic call output 12Vpp-0.25A
PRS 235. POWER SUPPLY FOR SYSTEMS
WITH PRIVATE CONVERSATION MOD-
ULE.
It may be installed with Project series intercoms
for supplying power to 4+1 systems with private
conversation module. Only the intercom which
has been called can speak to the door station.
All the other users are isolated.
Technical data
Power:
18VA
Housing:
DIN 6 modules A
Weight:
0.5 Kg. (1.1lb)
Approved by:
VDE according to the Safety
Standard EN60065
Output terminals
- Ground
+ Audio line power supply 7.2Vdc-0.1A
X Power supply for auxiliary services 12Vdc-
0.2A
Power supply 13Vac for:
- name plate lamps (continuous load 0.6A)
- electric door lock and bells (intermittent load
1A)
C+
Power supply for bells 13Vac- 0.15A
107.5
89
4
1
/
"
4
/
3
1
"
2
65
/
2
9
"
16
PRS226
PRS226E
PRS235
PRS240
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