Siemens SIMATIC S5-110A 6ES5 900-7AD11 CPU Central Module ZB/CPU EPROM Used

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Siemens SIMATIC S5-110A CPU central module, type ZB/CPU, model 6ES5 900-7AD11, in good used working condition. This legacy PLC processor is suitable as a replacement CPU for SIMATIC S5-110A systems where an EPROM-based central unit is required.

Item details

• Brand: Siemens​​

• Series: SIMATIC S5-110A​​

• Type: CPU / central module (Zentralbaugruppe, ZB/CPU)​​

• MPN: 6ES5 900-7AD11 (also written 6ES5900-7AD11)​

• Function: Main CPU/processor module for S5-110A PLC racks

• Memory: Uses plug-in EPROM memory submodule (orange EPROM carrier on front)​​

• Front controls/indicators:

  • Stop/Cycle mode switch​

  • NR/R selector switch​

  • Status LED on front panel​

• System compatibility: SIMATIC S5-110A PLC systems designed for CPU 900 / CPU 110 central modules

• Country of manufacture: Made in Germany (label on side)​​

• See photos/label for full technical specifications and exact configuration.

Condition

• Used module in good overall cosmetic and working condition.

• Typical signs of previous use: dust, surface marks and light scratches on housing; label edges show some discoloration.

• Front panel text and switch legends remain clear and readable; EPROM carrier and switches move freely.​

• Supplied as module only, without backplane, manuals, cables, or original packaging.