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AC1224 Installation Manual
Product Description
The AC1224 is a DIN-rail mountable single-phase-input power supply, which provides network power
for the AS-Interface
®
system. The AS-Interface
data are provided by the same single two-conductor wire. Therefore, special power supplies with an
integrated data-decoupling circuit are required to prevent the modulated signal voltage on the AS-
®
Interface
bus from being corrupted.
Intended Use
This device is designed for installation in an enclosure and is intended for commercial use to supply
®
power to AS-Interface
network systems.
Do not use this device in equipment, where malfunctioning may cause severe personal injury or
threaten human life without additional appropriate safety devices, that are suited for the end-
application.
If this device is used in a manner outside of its specification, the protection provided by the device may
be impaired.
When operating without AS-Interface structure (e.g. in a laboratory test), connect a 470μF/35V
capacitor between AS-Interface + and AS-Interface – terminals to avoid output voltage oscillations.
Installation Instructions
Install device in an enclosure providing protection against electrical, mechanical and fire hazards.
Install the device onto a DIN-rail according to EN 60715 with the input terminals on the bottom of the
device.
Make sure that the wiring is correct by following all local and national codes. Use appropriate copper
cables that are designed for a minimum operating temperature of 60°C for ambient temperatures up to
+45°C, 75°C for ambient temperatures up to +60°C and 90°C for ambient temperatures up to +70°C.
Ensure that all strands of a stranded wire enter the terminal connection. Unused screw terminals
should be securely tightened.
The device is designed for pollution degree 2 areas in controlled environments. No condensation or
frost is allowed.
The enclosure of the device provides a degree of protection of IP20. The housing does not provide
protection against spilled liquids.
The device is designed for overvoltage category II zones.
The device is designed as "Class of Protection I" equipment according to IEC 61140. Do not use
without a proper PE (Protective Earth) connection.
The device is suitable to be supplied from TN, TT and IT mains networks. The continuous voltage
between the input terminals and the PE potential must not exceed 300Vac.
A disconnecting means shall be provided for the input of the device.
The device is designed for convection cooling and does not require an external fan. Do not obstruct
airflow and do not cover ventilation grid!
The device is designed for altitudes up to 2000m (6560ft).
Keep the following minimum installation clearances: 40mm on top, 20mm on the bottom, 5mm left and
right side. Increase the 5mm to 15mm in case the adjacent device is a heat source. When the device
is permanently loaded with less than 50%, the 5mm can be reduced to zero.
The device is designed, tested and approved for branch circuits up to 20A without additional protection
device. If an external fuse is utilized, do not use circuit breakers smaller than 10A B- or 6A C-
Characteristic to avoid a nuisance tripping of the circuit breaker.
The maximum surrounding air temperature is +70°C (+158°F). The operational temperature is the
same as the ambient or surrounding air temperature and is defined 2cm below the device.
The device is designed to operate in areas between 10% and 90% relative humidity.
Functional Description
The output is electronically protected against no-load, overload and short circuit.
The green AS-i OK LED reports a nominal output voltage of a running device. The LED is off as soon
as the unit is in overload mode.
Do not parallel devices for higher output currents.
Do not connect outputs of devices in a series connection for higher output voltages.
In case of an internal defect, a redundant circuit limits the maximum output voltage to 55V. The output
shuts down and automatically attempts to restart.
The device is equipped with a manual input range selector. When used on 100-120V mains, set the
switch into the 115V position.
The device is equipped with an "IR addressing mode" feature, which is selectable via jumper on the
front of the unit. The addressing mode interrupts the data communication on the yellow AS-Interface
cable. Participants with an infrared interface can then quickly be assigned a new ID address by means
of an infrared programming unit without the need to disconnect them from the AS-Interface cable.
Afterwards, the "Communication Mode" can be selected again to restart the data communication. The
red LED reports an active IR-mode and a disabled communication on the yellow AS-Interface cable.
The device is equipped with a ground fault detection system, which monitors the AS-Interface network.
Detected ground faults are stored and displayed via the red LED and signaled by a relay contact.
Pushing the reset button longer than 2s will clear the fault signal. Pushing the reset button shorter than
2s will initiate a ground fault to test the ground fault. It is essential to connect the shield terminal to PE
or machine ground. The AS-Interface network must not contain any other ground fault detectors or
insulation monitoring devices. The ground-fault relay contact (NO-contact) opens with a recognized
ground-fault. The contact ratings are max. 25Vac or 60Vdc, 0.5A.
®
system is a field bus technology, where power and
Technical Data
All values are typical figures specified at 230Vac 50Hz input voltage, 30.6V
4A output load, 25°C ambient temperature and after a 5 minutes run-in
time unless otherwise noted.
Output voltage
DC 30.6V
Adjustment range
Not adjustable
Output current
4A
3A
Derate linearly between +60°C and +70°C
For use on AS-Interface
>4.4A
Current limitation
AC 100-120V /
Input voltage AC
220-240V
Mains frequency
50 – 60Hz
Input current AC
2.0 / 1.15A
Power factor
0.58 / 0.53
Input inrush current
45 / 50A pk
Efficiency
89.0 / 90.0%
Power losses
15.1 / 13.6W
Hold-up time
56 / 60ms
Temperature range
-10 to +70°C
Max. wire size (litz wire)
4mm²
Wire size AWG
AWG 20-10
Max. wire diameter
2.8mm
Wire stripping length
7mm / 0.28inch
Tightening torque
1Nm / 9lb.inch
Size (wxhxd)
73x124x102mm
Weight
650g / 1.43lb
Functional Diagram
L
Input
Input
Rectifier
Fuse
Power
Output
N
&
&
Converter
Input
Inrush
Filter
Limiter
Output
115/230V
Manual
Overvoltage
Switch
230
Protection
Output Characteristic
Output voltage
30.6V
A: min.
B: typ.
C: max.
15V
0V
0A
1A
2A
3A
Temperature Range
Allowed output current
4A
3A
A: continuous
B: short term (max. 60s)
0A
-10
Nominal
Factory setting 30.6V
Below +60°C ambient
At +70°C ambient
®
networks only
-15% / +10%
manual select
±6%
At 120 / 230Vac
At 120 / 230Vac
At 120 / 230Vac, 40°C,
cold start
At 120 / 230Vac
At 120 / 230Vac
At 120 / 230Vac
All terminals
All terminals
All terminals
All terminals
All terminals
Without DIN-rail
AS-i-ok
(green)
AS-i +
AS-i +
AS-i
Shield
Decoupling
Filter
Unit
AS-i -
AS-i -
Communication/
IR Mode
IR Mode (red)
Ground Fault
(red)
Ground
Ground
Fault
Fault
Monitor
Test /
Reset
A
B
C
4A
5A
6A
7A
Output current
B
A
+60
+70°C
Ambient temperature
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