ABB RDCO-01C – Resolver Feedback Interface Module for ABB ACS800 Drives

The ABB RDCO-01C is a resolver feedback option board designed to bring robust, noise‑tolerant position and speed feedback to ABB ACS800 variable-speed drives. The “-C” suffix indicates the conformal-coated variant, which typically performs better in humid, dust-prone, or chemically challenging environments. If you’re running heavy-duty applications—cranes, winches, steel processing, extruders, test stands—resolver feedback often seems to hold up better against electrical noise and vibration than many incremental encoders. That’s where this module fits neatly.

Company’s Order Placement Process and Guarantees

• Warranty: 365 days from delivery.
• Lead time: 1 week if in stock; no more than 1 month at the latest.
• Payment terms: 50% advance payment; full payment prior to delivery.
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Key Features

• Resolver feedback interface – Accepts resolver signals (SIN, COS, reference) and provides excitation for precise motor speed/position control.
• Conformal-coated (-C) board – Added protection in environments with moisture, dust, or corrosive vapors; in many cases it extends service life.
• Seamless drive integration – Plugs into supported ACS800 control units; parameters are configured directly from the drive panel or via software.
• High noise immunity – From my experience, resolver feedback is typically more tolerant of EMI compared with some incremental encoders in long-cable installations.
• Field-wiring friendly – Clearly labeled screw terminals for resolver connections and shield bonding.
• Diagnostics through the drive – You might notice that commissioning is straightforward: status and feedback scaling are visible through standard drive parameters.
• Designed for industrial duty – Suits cranes, winders, mixers, and test benches where steady feedback under shock and vibration is critical.

Technical Specifications

Related or Supporting Products

• ABB RDCO-01 – Same resolver interface without conformal coating; suitable for clean, controlled panels.
• ABB RDCO-02C – Incremental encoder interface (TTL/HTL) for drives that prefer pulse encoder feedback rather than resolver.
• ABB RDCO-03C – Absolute encoder interface (e.g., SSI/EnDat) where absolute position at power-up is needed.
• ABB RMIO-02 – I/O extension module; often paired when extra digital/analog I/O is required alongside feedback.
• ABB RDCU-12C / RDCU-15C – Control units used in ACS800 frames; compatibility typically determines which option slots are available.
• Shielded resolver cable – Low-capacitance, twisted pairs with 360° shield termination; helps maintain signal integrity over distance.

Installation & Maintenance

From my experience, the smoothest installs start with strict ESD handling and a clean cabinet layout. Power the drive fully down and wait for DC bus discharge before opening. The RDCO-01C plugs into the designated option slot; secure the board and route the resolver cable well away from motor leads and contactor wiring.

• Panel standards: Use a sealed, ventilated cabinet; maintain ambient within the drive’s rating. Avoid condensation even with the coated board.
• Wiring: Twisted pairs for SIN/COS and reference; 360° shield termination at the drive end. Grounding and bonding should be low impedance.
• Parameter setup: Select resolver as the feedback type, set poles, scale/speed filtering, and verify feedback direction before enabling closed-loop control.
• Safety: Lockout/tagout, verify absence of voltage, and follow ABB’s service guidance. Improper wiring may damage the resolver or the option board.
• Routine maintenance: Re-torque terminals after thermal cycles, check shield terminations, and keep the drive firmware current when recommended by ABB.
• Troubleshooting tip: If speed is unstable, reduce EMI coupling—separate cabling, improve shielding, and confirm the resolver is mechanically tight.

Quality & Certifications

• Compliance: ABB products of this class are typically CE-marked and UL/cUL recognized; RoHS conformity in most regions.
• Conformal coating: The “-C” variant is coated for added environmental protection, helpful in many industrial sites.
• Warranty: 365-day warranty provided by us; ABB’s standard manufacturer terms apply as per region and drive family.

One thing I appreciate is how forgiving resolver feedback can be in harsh settings. If you’re unsure whether RDCO-01C is the right fit for your ACS800 frame or control unit, share the drive type code and installed options—I can typically confirm slot availability and provide the exact wiring notes before you place the order.