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