PISA-B-812-B1
PISA-B-812-B4
Apr. 2021 / Rev. 0.1 DS-PISA-B-812-Bx-xx-EN www.pulspower.com 16 / 20
All parameters are specified at 24Vdc input voltage, 8x5A output currents, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
18. Environment
Operational temperature -25°C to +70°C (-13°F to 158°F) The operational temperature is the ambient or
surrounding temperature and is defined as the
air temperature 2cm below the device.
Storage temperature -40°C to +85°C (-40°F to 185°F) For storage and transportation
Output derating 1A/°C Between +60°C and +70°C (140°F to 158°F), see
Fig. 18-1
2.5A/1000m or 5°C/1000m For altitudes >2000m (6560ft), see Fig. 18-2
The derating is not hardware controlled. The user has to take this into consideration to
stay below the derated current limits in order not to overload the unit.
Humidity 5 to 95% r.h. According to IEC 60068-2-30
Atmospheric pressure 110-54kPa See Fig. 18-2 for details
Altitude Up to 5000m (16 400ft) See Fig. 18-2 for details
Over-voltage category N/A
Impulse withstand voltages 1.5kV Between input and chassis (according to IEC
60664-1 over-voltage category II)
Degree of pollution 2 According to IEC 60664-1, not conductive
Vibration sinusoidal 2-17.8Hz: ±1.6mm;
17.8-500Hz: 2g
2 hours / axis
According to IEC 60068-2-6
Shock 30g 6ms, 20g 11ms
3 bumps per direction,
18 bumps in total
According to IEC 60068-2-27
Shock and vibration is tested in combination with DIN rails according to EN 60715 with
a height of 15mm and a thickness of 1.3mm.
Fig. 18-1: Output current vs. ambient temp. Fig. 18-2: Output current vs. altitude
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