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Technical Specifications
Power Supply Module PS 951 24 V DC; 5 V, 7/15 A
SIEMENS
SIMATIC S5
PS
7A/15A
BATT1-BATT2
3.4V/2Ah
Replace by
trained
personnel
only!
+
-
EXT BATT
3.4...9V
BATT LOW
RESET
5V DC
5.2V DC
24V DC
INT DC
POWER
L+
M
24 V DC
Battery
BATT LOW
RESET
5 V
6
5.2 V
24 V
EXT. BATT
L+
5
4
M
POWER
PE
4
1
Chopper controller
4
Control electronics
2
Chopper controller
5
Radio interference suppression filter
3
Linear controller
6
Monitoring electronics
Block diagram
15-12
Technical specifications
Input voltage L+
- Rated value
- Permissible range
Input current at 24 V
- Rated value
- Inrush current
2
- I
t
Power consumption
Output voltage
- Rated value
- Tolerance
Output current
- Rated value without fan
- Rated value with fan
- Permissible range
Output voltage (PG/OP)
- Rated value
- Tolerance
Output current
Backup battery
- Backup time
Mains buffering
(at L+
)
min
Output voltage (auxiliary voltage)
- Rated value
- Tolerance
Output current
Short-circuit protection
Fault indicator
Fuse (primary circuit)
Signals to CPU
Class of protection
Galvanic isolation
5 V
1
5.2 V
2
RI specifications according to VDE
24 V
3
M
Power losses of the module
Weight
S5-115U Manual
(6ES5 951-7ND51)
24 V DC
19.2 to 30 V
5.04 A
max.
15×I
N
2
16 A
s
120.5 W
5 V
±1.5%
7 A
15 A
0.3 to 15 A
5.2 V
±1.5%
max. 2.5 A
2 lithium
batteries, size AA
(3.6 V/ 2×1.75Ah)
min.
1 year (at 0.3 mA,
25°C and
uninterrupted
backup)
min.
20 ms
24 V
±5%
max. 0.35 A
Electronic
No
Integral
Class 1
No
A according to
VDE 0871
typ.
24.1 W
approx. 1.7 kg (3.75 lb.)
EWA 4NEB 811 6130-02b
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