Outputs
Output Data Specification
Parallel Operation
Current Sharing
For n parallel connected devices, the output current can be increased to n x I
rated. A
maximum of five devices can be connected in parallel.
N + 1
If a fault occurs in the primary circuit of the first power supply unit, the second device
automatically takes over the entire power supply, without interruption, and vice versa.
Redundancy Fully redundant with external decoupling Diode module
Performance Requirements
Derating
Refer to the curve in the applicable section, Power Supply Power Boost and Output
Derating Curve or FET-OR Module Output Derating Curve.
Switching Frequency Variable with load – resonant switching
Turn on Delay After Applying Input Power
< 0.5 s (typical)
< 1 s (typical) for P480W48 and P960Wxx
Min Output Load
None
Ripple and Noise (20 MHz Bandwidth)
P120Wxx: < 40 mV pp
P240Wxx: < 50 mV pp
P480W24, P480W28: < 30 mV pp
P480W48, P400W40: < 80 mV pp
P960Wxx: < 100 mV pp
Reliability
Item
Specification
Mean-time-between-failure (MTBF) Power Supply: > 500,000 h, according to IEC61709 (SN29500)
FET-OR Module: > 1,000,000 h at 40°C (104 °F)
Mounting
Item
Phoenix Specification
Mounting Position Horizontally on all DIN-rails, according to EN 60715
Mounting Location
Attention
It is very important that each supply is
mounted in a location with adequate
space for free convective airflow and
away from other heat sources.
Recommended Clearance Around Power
Supply for Full Power Output
25 mm (1 in) on either side, 127 mm (5 in) above and 76 mm (3 in) below
Vertical Stacking of Power Supplies Operating at
Full Power
Not recommended. The convection cooling path is through the bottom and out the top. The
difference between inlet and exhaust air can be as high as 28°C (82 °F) at full power.
Dimensions
Refer to the specific power supply or redundancy module section in this chapter for unit
dimensions.
402 GEH-6855_Vol_II GEH-6855_Vol_II Mark VIeS Functional Safety Systems Volume II
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