Siemens SIMATIC S5 PS 951 modular power supply for S5‑115U/H PLC racks, part number 6ES5951‑7LD12 (also written 6ES5 951‑7LD12). Unit is in used, fully working condition and comes in a Siemens S5‑115 carton with front voltage selector and terminals intact.
Brand: Siemens
Series: SIMATIC S5‑115U/H
Model: PS 951 power supply module
Part no.: 6ES5951‑7LD12 / 6ES5 951‑7LD12
Input: 115/230 V AC, 50/60 Hz selectable via front voltage selector window
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Output:
5 V DC, 7 A without fan subassembly or up to 15 A with external fan unit installed
Additional internal 24 V DC / 0.35 A auxiliary output for rack electronics.
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Front panel features:
Battery compartment for 3.4 V memory battery (battery not included; age unknown).
LED indicators for 5 V DC, 5.2 V DC, 24 V DC and internal DC power OK.
Terminals for L1, N and protective earth plus DC distribution posts.
Application: Primary power supply for S5‑115U/H CPU racks and I/O backplane.
Used, removed from a working S5‑115 installation and Siemens‑tested labels present on metal chassis.
Module shows light cosmetic wear, scuffs and some marks on housing and carton from storage, but no damaged terminals or broken plastic.
Voltage selector is intact and moves correctly; terminals are clean with screw heads in good shape.
Battery compartment is present; back‑up battery should be replaced by the buyer before critical use.
No cables, manuals or mounting hardware included beyond what is shown.
Compatible only with SIMATIC S5‑115U/H racks that use PS 951 modules; verify your rack and CPU type before ordering.
Must be wired by qualified personnel according to Siemens S5‑115U installation guidelines (earth connection, fusing and load sharing when used with fan units).
Ideal as a spare or replacement PSU for maintaining legacy S5‑115 systems where new Siemens parts are no longer available.
