Siemens SIMATIC S5 PS 951 power supply module, model 6ES5951-7LD21, for S5‑115U/H PLC racks, new old stock in original Siemens box.
Unit appears never installed or used; only the packaging shows light storage wear.
Brand: Siemens
Series: SIMATIC S5 / S5‑115
Model: PS 951
MPN: 6ES5951-7LD21 (also written 6ES5 951-7LD21)
Type: PLC rack power supply module
Compatible system: Siemens SIMATIC S5‑115U/H programmable controllers
Input voltage: 120/230 V AC (selectable), 50/60 Hz
Input current: approx. 1.4/0.8 A at 120/230 V AC
Output voltage: 5 V DC
Output current: 7 A without fan, up to 15 A with fan-assisted rack cooling
Backup: Version without internal backup battery; external backup arrangements per Siemens documentation.
Application: Provides regulated 5 V logic supply for S5‑115U/H CPU and I/O modules.
Country of manufacture: Austria (label “Made in Austria”).
New, never used; module remains clean with no rack wear on housing or mounting edges.
Supplied in original Siemens SIMATIC S5 box with matching 6ES5951‑7LD21 label; carton has marks, small dents and label wear from long-term storage.
No signs of wiring on terminals or scratches on the metal cover beyond minor handling traces.
No additional accessories, manuals, or mounting hardware included beyond the module and box.
Suitable as a replacement or spare PS 951 power supply for existing S5‑115U/H installations needing higher 5 V current (7/15 A).
Ensure correct mains voltage selection (120 or 230 V AC) and proper rack cooling if operating at higher load.
For wiring diagrams and backup options, refer to Siemens S5‑115U manuals and PS 951 technical data.
