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Most orders ship within 1–2 business days via UPS. Larger equipment ships via freight carrier, and customers can use the shipping estimator on the product page for a location-specific quote. Local pickup is also available at the Fairfield, IL facility, typically ready within 4 hours.

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MRO Exchange accepts all major credit cards, PayPal, and Shop Pay. Purchase order and wire transfer payment is also available, with payment due prior to shipment. Custom terms are available for established accounts.

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Siemens 6SN1121-0BA12-0AA0 SIMODRIVE 611-A Closed-Loop Plug-In Control Unit

$649.99 USD

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✓ 30-day returns on every item — return policy

ConditionSurplus - Untested MPN6SN1121-0BA12-0AA0 Stock #0226-00389

30-day returns on every item. Photos reflect the actual item’s current condition — see our return policy and condition guide.

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Siemens 6SN1121-0BA12-0AA0 SIMODRIVE 611-A Closed-Loop Plug-In Control Unit for main spindle drive, Version A. Designation on label: REG.EINSCH.HSA-ANALOG (Regelungseinschub HSA-Analog). Internal drawing number GWE-566008901601. Part of the Siemens SIMODRIVE 611-A series of analog spindle drive control modules. Designed for use with Siemens 1PH series main spindle motors with a direct TTL measuring system interface. Plug-in regulation card that mounts into a compatible SIMODRIVE 611 power module such as the 6SN1123 series. Features onboard processor, daughter card expansion connectors, fan cooling, NAS relay, and multi-axis interface connectors including X211, X431, and JX5 visible on the PCB. 32.0000 MHz oscillator crystal dated 07/94 visible on control board. Made in Germany by Siemens. CE marked. Discontinued model; replaced in current product lines by the 6SN1121-0BA11-0AA1. Compatible with Siemens SINUMERIK CNC systems including Series 0C, 810, 820, and related platforms using the SIMODRIVE 611-A analog drive architecture. Suitable for CNC machining centers, lathes, and milling machines requiring precise closed-loop spindle speed and position control.

Stock # 0226-389

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Shipping & Handling

Most orders ship within 1–2 business days via UPS, but expedited same-day handling is available as an add-on to orders in cart. Larger equipment ships via freight carrier. Use the shipping estimator above for a location-specific quote. Local pickup is also available at our Fairfield, IL facility, typically ready within 4 hours.

Returns & Condition

All items are sold as-described based on the photos and condition listed. If an item arrives differing from its description, it may be eligible for return or refund. See our full condition guide for details on our grading terms.

Payment Options

We accept all major credit cards, PayPal, and Shop Pay. Purchase order and wire transfer payment is also available by selecting "Purchase Order / Wire Transfer" at checkout. Payment is due prior to shipment. Contact us for custom terms on established accounts. Tax exemptions are honored if proper documentation is provided.