Siemens SIMATIC S5 PS 951 Power Supply 6ES5951-7LD21, 120/230V AC, 5 VDC New

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.

Item details

• 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”).

Condition

• 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.

Notes

• 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.