Industrial communication
Addition to the AS-i power
supply family
2.8 to 8 A with high efficiency
in a slim design
High efficiency, low heating of the
control cabinet
High power reserves
Particularly space-saving design
Low inrush current
Safe switch-off by circuit breakers
in case of short circuit
Efficient and reliable
In the development of the power supplies, particular
importance was attached to a sufficient dimensioning
of the components, so that operation is permanently
ensured even in the limit areas of the specification. This
results in an excellent MTBF value of about 1.4 million
hours.
Moreover, all ifm power supplies feature sufficient
power reserves to reliably handle even short current
spikes.
Due to innovative technologies, the new AS-i power
supplies require considerably less space in the control
cabinet, as compared to common cabinet power
supplies. Another advantage of the efficient design is
the above average degree of efficiency of up to 94
per cent. This saves energy costs and reduces waste
heat in the control cabinet.
The ifm power supplies only produce little heat in the
control cabinet due to their high degree of efficiency.
Industrial communication
AS-Interface power supplies /
earth fault monitors
Output current
permanent / peak
Input voltage
[V]
Peak
switch-on current
(120 / 230 V AC)
Buffer time
(120 / 230 V AC)
[ms]
Degree of efficiency
(120 / 230 V AC)
[%]
Order
no.
3 A / 3 A peak
115 / 111
87.0 / 88.0
AC1256
AS-i switched-mode power supplies for control cabinet installation
2.8 A / 2.8 A
100...120 / 200...240 AC
4 A / 4.4 A
100...120 / 200...240 AC
3 A / 3 A peak
80 / 78
88.0 / 89.0
AC1254
8 A / 8.4 A
100...120 / 200...240 AC
3 A / 3 A peak
46 / 47
89.5 / 90.5
AC1258
8 A / 8.4 A
2 x 380...480 AC
4 A / 4 A peak*
34 / 54*
92.0 / 92.1*
AC1253
4 A / 4.4 A
24 DC
2 A peak**
6**
90.5**
AC1257
* at 400 / 480 V AC
** at 24 V DC
Dimensions
Common technical data
Example: AC1254, AC1256
Output voltage
+-+ -
4
N L PE
114,6
124,5
40
4
Example: AC1258
L PE
4
ifm article no. 7511539 · We reserve the right to make technical alterations without prior notice. · 04.2013
1
62
1) LED AS-i OK
29.5...31.6 from AS-i
[°C]:
-25...70
Frequency range
[Hz]
50...60, ± 6 %
• Inrush current limitation
Instead of an inrush current limitation with a simple
NTC, charging of the capacitors of the new switchedmode power supplies from ifm is microprocessorcontrolled. This ensures an ideal start-up of the voltage supply.
• Long bridging times
The voltage supply is ensured for several milliseconds
if the mains voltage briefly fails, e.g. caused by
switching operations in the supply network.
• Wide operating temperature range
ifm switched-mode power supplies provide the
specific nominal power across the entire temperature
range. Derating only has to be taken into account
above an operating temperature of 60 °C.
35
124
130,8
+-+-
N
[V DC]
Operating temperature
Functions and advantages
35
124
130,5
1
114,6
124,3
• Double terminal
All AS-i switched-mode power supplies are equipped
with double terminals. This simplifies wiring and
provides more clarity in the control cabinet.
For further technical data please go to: www.ifm.com