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R911256154 (RAC 2.3-250-460-A0S-W1)

RAC Spindle Drive Controllers

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The Bosch Rexroth MPN R911256154 (RAC 2.3-250-460-A0S-W1) is a main spindle AC drive controller engineered for precise spindle positioning in numerically controlled machinery. It features an internal control loop, supporting resolution up to 1/4,000,000 revolutions, and high-resolution feedback for accurate low-speed operation. The device connects directly to three-phase mains at 400 V, 50 Hz ±15%, or 460 V, 60 Hz. It accommodates a rated current of 250 A and provides an analogue speed command interface (+/-10 V) as well as an RS 232-C serial interface. Integrated functions include an emergency stop for safe operation and a DC brake for spindle containment during power loss. Cooling is achieved via an internal blower. Electrical connections should align with the supplied manual instructions.

Technical Specifications

Internal Control Loop
Yes

Maximum Resolution
1/4 000 000 revolutions

High-resolution Feedback Feature
Yes

Controlled by
Motor feedback or 1:1 gears or a direct drive

Emergency Stop Switch
Yes

Energy Regeneration
Yes

Stopping Method
Direct current braking

Power Connections
Independent

CNC Connections
Independent

Delivery Note
Included in shipping container

Product Identification
Barcode stickers on packaging

Global Shipping
Yes

Common Misspellings

1620 Old Apex Road
Cary, NC 27513, USA

Toll Free: 1-888-551-3082
International: 1-919-443-0207

Fax: 1-919-867-6204

[email protected]

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Warranty

Indramat USA 1 Year Warranty

Repair

We offer a repair service for the RAC 2.3-250-460-A0S-W1.

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North Carolina Office

Indramat USA
1620 Old Apex Road
Cary, NC 27513
USA

Phone

Toll Free: 1-888-551-3082
International: 1-919-443-0207

Indramat USA sells factory new and pre-owned surplus products and maintains channels to procure supply. Indramat USA is not affiliated with nor an authorized distributor or representative of any manufacturers, brands or products listed. Designated trademarks, brand names, and brands appearing herein are the property of their respective owners.