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Siemens SIMATIC S5 PS 3A Power Supply 6ES5951-7LB14, 115/230V AC, 5 VDC 3A, Used
Siemens SIMATIC S5 PS 3A power supply module, model 6ES5951-7LB14 (PS 951), for S5-115U/H PLC racks, in good working used condition. Front panel includes battery compartment, status LEDs and 115/220 V AC voltage selector.
Item details
Brand: Siemens
Series: SIMATIC S5
Model: PS 3A / PS 951
MPN: 6ES5951-7LB14 (also written 6ES5 951-7LB14)
Type: PLC rack power supply module
Compatible system: Siemens SIMATIC S5-115U / S5-115H PLC systems
Input voltage: 115/230 V AC selectable, 50/60 Hz
Output: 5 V DC, 3 A (main logic supply) plus auxiliary 5.2 V DC and 24 V DC outputs indicated on front panel; see datasheet for exact ratings.
Front indicators/controls:
Battery compartment (3.4 V / 5 Ah “C” size backup battery, not included)
Terminals/LEDs for 5 V DC, 5.2 V DC, 24 V DC, INT DC POWER, EXT BATT 3.4…9 V, BATT LOW and RESET
Voltage selector window for 115/220 V AC input
Mounting: Standard S5-115U/H rack module format with rear edge connector and side ejector handles (not visible in photos but standard for this type).
For complete electrical data and wiring, refer to Siemens S5-115U manuals and PS 951 datasheet.
Condition
Used, tested and in good working condition as stated.
Cosmetic wear includes discoloration/yellowing of plastic, light scuffs and marks on housing and metal cover.
Factory “Siemens Tested” sticker present; labels remain intact and legible.
Front terminals and battery door appear complete; mains leads currently wired to L1/N/earth terminals as shown.
Backup battery is not supplied and should be replaced before use if buffer operation is required.
No original box, manuals, or additional accessories included.
Notes
Suitable as a replacement power supply for existing S5-115U/H installations needing a PS 951 3 A module.
Ensure input selector is correctly set for your mains voltage (115 V or 220 V AC) before energizing.
Buyer should confirm rack compatibility and load requirements against Siemens documentation.
