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Power supply unit

PS-303

Power supply unit

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The PS-303 power supply unit operates with 220VAC or 24/12 VDC and converts the input voltage into a regulated voltage of 12/24 VDC. The unit has an input for a standby power source of 12/24 VDC, which switches over automatically in the event of a power supply failure.

The PS-303 has a galvanic isolation of input and output feed circuit, overvoltage, current overload and reverse polarity protection. For a dry environment installation (IP22).
Characteristics PS-303-А2-2 (4.2 А) PS-303-А2-2 (6.5 А) PS-303-А2-2 (12.5 А) PS-303-А2-1 (8.5 А) PS-303-А1-1 (12.5 А) PS-303-А1-1 (18.5 А) PS-303-22-1 (8.5 А) PS-303-22-2 (4.2 А) PS-303-22-2 (14.6 А) PS-303-21-1 (12.5 А) PS-303-21-1 (27.5 А) PS-303-11-1(8.5 А)
Input voltage (main), V 220 (198…242)*, AC, frequency 50 (60) Hz 24 (19…36)*, DC
Input voltage (standby), V DC 24 (19…36)* 12 (9…18)* 24 (19…36)* 12 (9…18)*
Output voltage, V DC 24 24 24 12 12 12 12 24 24 12 12 12
Subtype А B B А B B C C D D D D
Pulses, mV 150 200 150 120 150 150 120 150 150 120 120 120
Output power, W 100.8 156.0 300.0 102.0 150.0 222.0 102.0 100.8 350.4 150.0 330.0 102.0
Efficiency, % ≈ 66.2 ≈ 89.0 ≈ 88.0 ≈ 66.7 ≈ 87.5 ≈ 85.0 ≈ 57.7 ≈ 51.3 ≈ 80.0 ≈ 75.0 ≈ 80.0 ≈ 80.0
Galvanic isolation from power mains + + + + + + + + + + + +
Galvanic isolation from standby mains + - - + - - + + - - - -
Switchover to standby power automatic (automatic restoration in case of power recovery)
Built-in protection
  • load SC
  • current overload (fuses)
  • reverse polarity (fuses)
LEDs
  • main power
  • power from standby source
Overall dimensions, mm 288.0 × 278.5 × 100.3
Operating temperature, °C –15…+55
Limiting temperature, °C –60…+70
Weight, kg 4.2 3.5 3.7 4.4 3.5 3.8 4.5 4.3 4.2 4.2 3.9 3.6
Protection degree IP22

Notes

  1. If external alarm unit AU-106 (AU-206) is connected, it ensures sound and light signaling in case of main-standby power transfer. Arrange external alarm unit AU-106 (AU-206) at order (it is not included in the scope of delivery)
  2. «*» - power voltage range is given in parenthesis