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.
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.
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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.
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.
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.
