Siemens SIMATIC S5-115F - Power Supply Module

Technical Specifications S5-115F Manual
8.2.2 Power Supply Module
PS 951 Power Supply Module 24 V DC; 5 V, 7 A (6ES5 951-7ND21)
Technical Specifications
Input voltage L+
- rated value 24 V DC
- permissible range 19.2 to 30 V
Input current at 24 V
- rated value 5.4 A
- inrush current max. 132 A
- I
2
t 16 A
2
s
Power consumption 130 W
Output voltage
- rated value 5 V
- tolerance ±2%
Output current
- rated value 7 A
- permissible range 0.3 to 7 A
Backup battery Li battery,
size C
(3.6 V/5 Ah)
- Backup time min. 1 year (at 0.3 mA,
25 °C and
uninterrupted
backup supply)
Short-circuit protection electronic
Fault indicator no
Fuse (primary circuit) integral
Class of protection class 1
Floating no
Insulation rating electrical separation
to VDE 0160
- tested with 500 V DC
RI specification A+14 dB to VDE 0871
Power loss of the
module typ. 34 W
Weight approx.1.9 kg (4.2 lbs.)
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Block diagram
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Battery
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PE
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RESET
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5 V
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5.2 V
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24 V
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L+
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5 V
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24 V
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Signals
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POWER
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1 Chopper controller 4 Control electronics
2 Chopper controller 5 RI filter
3 Linear controller 6 Monitoring electronics
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SIEMENS
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SIMATIC S5
PS
7A/15A
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EXT BATT
3.4...9V
BATT LOW
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RESET
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5V DC
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5.2V DC
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24V DC
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INT DC
POWER
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24 V DC
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Batt.
3.4V/5Ah
Replace by
trained
personnel
only!
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5.2 V
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EXT.BATT
8-6 EWA 4NEB 811 6148-02