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Product description
The Siemens 6ES5946-3UR21 belongs to the SIMATIC S5 product range and is marked as CPU 946R. Siemens and the exact repair catalogue assign the module to the S5-155H automation system and describe it as a redundant processor unit. The complete order number 6ES5 946-3UR21 distinguishes this version from the CPU-946 variants of the S5-155U and from other revision levels. The bound stock item is expressly designated as Version 4 in the eBay title. The Siemens manual for S5-155U and S5-155H describes the CPU 946R as a central processing module requiring two slots. The documentation lists slots 11, 19 and 27 as CPU positions in the S5-155H central controller. The mechanical design is a rack-mounted plug-in module with a populated circuit board and metal front panel. A RUN/STOP selector and several status indicators are located on the front. The rear connectors provide the connection to the rack. The exact product record lists the device class CPU/Control Board and the SIMATIC S5-155H series. Mechanical data are 210 mm height, 40 mm width and 260 mm depth. An exact product record states a weight of 1,076 kg. CPU designation 946R, the S5-155H system, redundant design, revision level and complete order number form the identity characteristics. The front panel extends over the full module height. An upper and a lower extraction handle are part of the visible mechanical design. The populated circuit board is open behind the front panel. The visible front labelling shows the RUN/STOP selector and status indicators. The item nameplate states the complete number 6ES5946-3UR21 and the identified Version 4.
Example image – The item supplied will have the stated manufacturer or type number and the stated condition category. Serial number, manufacturing date, labels, colour, packaging and normal signs of use or storage may differ. Specifications
| Manufacturer | Siemens |
|---|---|
| Product series | SIMATIC S5 |
| Manufacturer/order/identification number | 6ES5946-3UR21 |
| Device type | CPU/central processing module |
| CPU designation | CPU 946R |
| System assignment | S5-155H |
| Processor version | Redundant processor unit |
| Revision level | Version 4 |
| Design | Rack-mounted plug-in module with front panel |
| Slot requirement | 2 slots |
| Documented CPU slots | 11, 19 or 27 |
| Front controls | RUN/STOP mode selector |
| Diagnostic display | Several front status LEDs |
| OB1 basic load | 30 ms |
| Interrupt reaction time | 300 µs |
| Timers | 256 |
| Counters | 256 |
| Flags | 2,048 flags + 32,768 S flags |
| Dimensions | 210 × 40 × 260 mm (H × W × D) |
| Weight | 1,076 kg |
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Which CPU and system designation does the Siemens 6ES5946-3UR21 have?
The exact module is documented as a CPU 946R from the SIMATIC S5 range for the redundant S5-155H central control system; the bound item has Version 4.
Which mechanical data are documented for the 6ES5946-3UR21?
The product record states 210 × 40 × 260 mm for height, width and depth and a weight of 1,076 kg. The Siemens manual describes a requirement of two slots.
What applies if an item develops a defect within 14 days?
For the condition categories “Used, removed from an installation” and “New, old stock”, the contractual 14-day right of return in the event of a defect applies. The defect must occur within 14 calendar days after delivery and be reported in text form within the same period.
In particular, the REHA tamper-evident seal must remain fully intact and our RMA approval is required before return. In an accepted case, we decide between replacement and refund. Details in Section 11 of the Terms.
Which shipping methods and delivery times are available?
The shipping method, shipping cost and estimated delivery time are confirmed for the specific order. Depending on the item, destination and urgency, we can check parcel, express or freight shipping as well as collection.
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Can I return an item ordered incorrectly or found incompatible?
No. There is no general B2B right of return, exchange, cancellation or withdrawal. Incorrect or duplicate orders and a lack of suitability or compatibility with the customer’s installation are not covered by the contractual 14-day right of return in the event of a defect. Details in Section 12 of the Terms.
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