User Manual

Siemens Building Technologies CA1N5151E / 11.1998
Landis & Staefa Division 1/2
FU-I1
Power supply for
sensors
AC 24 V to DC 15 V power supply for
active DC 15 V sensors
• suitable for use with all active
sensors
• can be placed in duct sensor
housing, wallboxes or in control
panels
FU-I1
Technical data
Power supply (input) AC 24 V ±15 % (SELV)
Output DC 15 V ±10 %
Output current I
max
≤ DC 20 mA
Sensor signal unchanged
Terminal connections Screw terminals 2.5 mm
2
Protection III (
22
22
2)
Protection class IP20 to IEC529
Ambient temperatures:
Operation 0 ... 50 °C
Storage, transport –25 ... 70 °C
Weight 0.03 kg
Dimensions 56 x 22 x 18mm
Principle of operation
The FU-I1 power supply is only used when AC 24 V are available but the
sensor requires DC 15 V : e.g. CLASSIC with the FKA-H2.
Terminals 3 and 6 are permanently connected and are reserved for feeding
through the sensor signal DC 0 ...10 V .
In addition, a fixed connection is provided between terminals 4 and 5 for
earthing, cable screening etc.
Construction
The plastic housing, which is enclosed in heatshrink sleeving, contains the
printed circuit board with the electronics and the connection terminals.
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