Switching Power Supply 75PS (75W)

75ps
  • Power – up to 75 W
  • Mounting – DIN rail or screw mounting
  • Regulated output voltage
  • Output voltage range from 4.2 V to 55.2 V
  • Input – terminal block
  • Output – terminal block
  • IP20 protection rating
  • Terminal protection rating IP00

The power supplies are designed for general-purpose use to power electrical and electronic devices with DC voltage in indoor environments without explosive hazards. The output voltage range is from 4.2 V to 55.2 V. The unit is designed for DIN rail mounting, but can also be secured with screws using a flange (flange must be ordered separately).

The nominal output voltages and corresponding maximum output currents are listed in the table. The power supply is protected against output short circuits. Input and output wiring is connected via screw terminals. The input and output terminals are not protected against contact with hazardous voltage. Protection of the input terminals must be ensured by the customer.

Table 1: Technical parameters
Input Voltage 195 - 255 V AC
Operating temperature -15°C to +40 °C
Operating Relative Humidity Max. 75% non-condensing
Efficiency (typical) 85%
Output short-circuit protection Yes – self-resetting
Surge protection Yes, max. 135% of output voltage
Dielectric Strength Output – PE min. 500 V DC
Option to connect the output negative pole to PE Yes
Option for series connection Yes
Option for parallel connection Yes
Operating frequency 25 - 60 kHz
Dimensions 120 × 102 × 48 mm
Weight 540 g

Table 2: Documents
Ikona Brochure
Ikona Declaration of Conformity

Table 4: 75PS Power Supply Models

Model Name Output Voltage Output Current Stability Ripple Noise
75PS04V2/7A.x 4,2 V 7 A <2 % <20 mV <50 mV šš
75PS05V/7A.x 5 V 7 A <2 % <20 mV <50 mV šš
75PS06V/7A.x 6 V 7 A <2 % <20 mV <50 mV šš
75PS06V9/7A.x 6.9 V 7 A <2 % <20 mV <50 mV šš
75PS09V/7A.x 9 V 7 A <2 % <20 mV <50 mV šš
75PS10V/7A.x 10 V 7 A <2 % <20 mV <50 mV šš
75PS12V/6A.x 12 V 6 A <2 % <20 mV <50 mV šš
75PS13V8/5A.x 13.8 V 5 A <2 % <20 mV <50 mV šš
75PS15V/5A.x 15 V 5 A <2 % <20 mV <50 mV šš
75PS16V/4A5.x 16 V 4,5 A <2 % <20 mV <50 mV šš
75PS17V/4A.x 17 V 4 A <2 % <20 mV <50 mV šš
75PS18V/4A.x 18 V 4 A <2 % <20 mV <50 mV šš
75PS20V7/3A5.x 20,7 V 3,5 A <2 % <20 mV <50 mV šš
75PS24V/3A.x 24 V 3 A <2 % <20 mV <50 mV šš
75PS27V6/2A5.x 27.6 V 2.5 A <2 % <20 mV <50 mV šš
75PS48V/1A5.x 48 V 1,5 A <2 % <20 mV <50 mV šš
75PS55V2/1A3.x 55,2 V 1,3 A <2 % <20 mV <50 mV šš

.x – the digit specifies the type of added functions (see below)

Additional Power Supply Functions (Designation .x):

Description of Additional Functions:

Disconnect function

- The disconnector serves as protection against deep discharge of the battery. This means that when the voltage at its output terminals drops below 10.5 V (21 V), it disconnects the battery from the circuit (galvanically disconnecting the positive pole). Any further drop would cause irreversible damage to the battery, requiring its replacement, while the energy it can still deliver at this voltage is very low and the voltage drops rapidly.

- The disconnector connects the voltage to the battery terminals only if a battery with the correct polarity and a voltage of at least 30% of the nominal value is connected.

- If the battery is disconnected during operation, the circuit between the output terminals and the battery (AKU) terminals will not be interrupted.

- The disconnector connects the battery (AKU) terminals to the output terminals only after the power supply is switched on.

- When the power supply is switched off and the battery is connected, the power consumption from the battery is approximately 10 µA.

- In the event of a mains failure, the disconnector keeps the battery (AKU) and output terminals connected until the voltage drops below 10.5 V for a 13.8 V supply or 21 V for a 27.6 V supply – then the circuit is disconnected.

- A power supply restart (start-up) is required for reconnection.

When the total current consumption – i.e., the current drawn from the output plus the current required for battery charging – is exceeded, the output voltage decreases, a process known as voltage limiting. The battery then begins to act as a current source, and the total possible current draw is determined by the sum of the power supply's maximum output current and the battery current, which is limited only by the fuse rating. Unless the fuse blows due to an enormous overload, this state is time-limited only by the battery capacity. As the battery discharges, its output voltage drops, and it will be disconnected at the values specified in the previous text. Reconnection of the battery to the circuit occurs only when the load decreases to a level that allows the output voltage to rise to at least 12 V for a 13.8 V supply and 24 V for a 27.6 V supply.

In the case of the battery-equipped version of the power supply, a red LED lights up when the unit is switched on if the battery is not connected or is connected with reverse polarity. The battery can be connected even while the power supply is running; however, replacing it during operation is risky. This is because disconnecting the battery does not break the connection between the battery (AKU) and output terminals, and a reverse polarity connection would result in short-term high current spikes, leading to damage to the power supply or the powered device.

Battery Charging Current Setting

- This function is used to set the maximum charging current for the battery in five steps by inserting a jumper into the corresponding position. Note that this circuit does not limit the current the battery can deliver to the load. For 13.8 V units: 1 A, 2 A, 3 A, 4 A, and 4.5 A. For 27.6 V units: 0.5 A, 1 A, 1.5 A, 2 A, and 2.25 A. The last value represents the maximum current if the jumper is not inserted or is damaged. When setting the maximum charging current, it is recommended to consider the battery manufacturer's maximum charging current specifications and the circuit’s current ratings.

Status Signaling

- Galvanically connected: During operation, a voltage of approximately 10 V is present at the output terminals. The negative pole is connected to the negative pole of the output voltage.

- Galvanically separated: Provided via a relay change-over contact with a maximum load of 1 A / 125 V AC or 1 A / 24 V DC.

External Shutdown

Applying a voltage of 10–15 V to the terminals will shut down the power supply without the need to disconnect the AC input. The input is galvanically isolated by an optocoupler with a dielectric strength of 5 kV.

- This function serves to simulate a mains power failure and to verify the operation of the entire system in this mode (e.g., measuring battery voltage). If supported by the control unit, such measurements can be performed remotely at selected intervals.

Blown Fuse Signaling

- If the fuse is blown while the power supply is switched on, a red LED will light up.