$ 96.54
Description Product Introduction The ABB RDCO-02C is an encoder interface module for ABB’s ACS800 and ACS880 drive families—the ones running precision applications like cranes, hoists, winders, and positioning systems. This board plugs into the drive’s option slot, reads encoder feedback (HTL or TTL), and sends the position and speed data to the drive’s control board via a DDCS fiber-optic link. Without it, the drive runs open-loop (scalar or vector without feedback). With it, you get full closed-loop torque and speed control. What distinguishes the ABB RDCO-02C from the earlier RDCO-02 is the expanded encoder support and improved noise immunity. The “C” revision adds support for TTL encoders (5 V differential) alongside the HTL (24 V) inputs. It also includes a more robust 12 V encoder supply—the earlier version sometimes sagged under load. In my experience, the RDCO-02C is the one to use if you’re retrofitting an older drive or replacing a failed encoder board. It works in both ACS800 (legacy) and ACS880 (current) drives, so it’s a single spare for mixed fleets. Key Technical Specifications Parameter Specification Model ABB RDCO-02C Series ACS800 / ACS880 Module Type Encoder Interface Encoder Types HTL (24 V, push-pull), TTL (5 V differential) Encoder Supply 12 VDC, 0.2 A (for HTL encoders) Input Frequency 500 kHz maximum Channel Types A, B, Z (incremental) Communication DDCS fiber-optic link (to drive control board) Isolation Optically isolated encoder inputs Status Indication LEDs for power, communication, encoder activity Mounting Drive option slot (ACS800/ACS880) Power Consumption 5 W (from drive backplane) Operating Temp 0°C to 55°C Dimensions Standard option module size Compatibility ACS800 (all frames), ACS880 (all frames) Firmware / Software Versions & Upgrade Notes The ABB RDCO-02C contains firmware that is pre-installed and not field-upgradable. The module is recognized automatically by the drive when installed. Minimum drive firmware: ACS800: Firmware version 5.0 or later for full TTL encoder support. ACS880: All firmware versions support the RDCO-02C. Drive software: The module is configured through the drive’s control panel or DriveStudio (ACS800) or Drive Composer (ACS880). No separate software for the module. Parameter settings: In ACS800, set parameters 50.01–50.06 for encoder type, pulses per revolution, and feedback configuration. In ACS880, use parameters 90.01–90.20. Hardware note: The ABB RDCO-02C uses a different connector pinout than the RDCO-01. If you’re replacing an RDCO-01, check your encoder wiring. The pinout changed. ⚠️ Field note: The ABB RDCO-02C communicates with the drive via a fiber-optic cable (DDCS). If the fiber is damaged or the connectors are dirty, the drive will show a “COMM LOSS” fault. I’ve seen people replace the module three times only to find a dirty fiber connector. Clean the fiber ends with a lint-free wipe and inspect for cracks before swapping hardware. Compatibility & Replacement Matrix Original Model Replacement Model Compatibility Level Key Notes ABB RDCO-01 ABB RDCO-02C Drop-in (with wiring check) RDCO-01 supported only HTL encoders. RDCO-02C adds TTL support. Check encoder wiring—the pinout changed. ABB RDCO-02 (original) ABB RDCO-02C Drop-in Same pinout. The C revision has improved encoder supply and noise immunity. Direct swap. ABB RDCO-02C (same) ABB RDCO-02C Drop-in Direct replacement. Any C revision is interchangeable. ABB RDCO-03 ABB RDCO-02C Needs adaptation RDCO-03 is for absolute encoders (EnDat, SSI). Not a direct replacement. Third-party encoder interface ABB RDCO-02C Incompatible No substitute. The DDCS fiber-optic link is proprietary to ABB drives. Frequently Asked Questions Q: What drives does this module work with? The ABB RDCO-02C works with ACS800 (all frame sizes) and ACS880 (all frame sizes) drives. It does not work with ACS550, ACS355, or ACSM1 drives—those use different option boards. Q: How do I wire an HTL encoder to this module? The ABB RDCO-02C has a 15-pin D-sub connector. For HTL encoders (24 V push-pull), connect: Pin 1: Encoder supply (12 V output) Pin 2: Supply ground Pin 3: A channel Pin 4: B channel Pin 5: Z channel (zero pulse) Pin 6: A inverted (if available) Pin 7: B inverted Pin 8: Z inverted The module provides 12 V for the encoder. Most HTL encoders run on 12–24 V, so 12 V is sufficient. Q: What’s the difference between HTL and TTL encoders? HTL (High Threshold Logic) uses 24 V signals and is more noise-immune, suitable for long cable runs. TTL (Transistor-Transistor Logic) uses 5 V differential signals and is better for high-speed, high-resolution applications. The ABB RDCO-02C supports both—configure the encoder type in the drive parameters. Q: My drive shows “ENCODER FAULT.” What should I check? First, check the encoder wiring. The ABB RDCO-02C has status LEDs. If the “ENCODER OK” LED is off, the module isn’t seeing pulses. Verify the encoder supply voltage (12 V on pin 1). If the supply is present, check the A and B channels with an oscilloscope. If the signals are present but the LED is off, the module may be configured for the wrong encoder type. Check drive parameters 50.01 (ACS800) or 90.01 (ACS880). Q: Can I use this module with a resolver? No. The ABB RDCO-02C is for incremental encoders only. For resolver feedback, you need the RDCO-04 or an external resolver-to-encoder converter. Q: Does this module support encoder emulation? No. The ABB RDCO-02C reads encoder signals into the drive. It does not output encoder signals to external devices. If you need encoder output (to a PLC or controller), you need the RTAC-01 or a similar encoder output module. Q: How long can the encoder cable be? For HTL encoders (24 V), the cable can be up to 300 meters if shielded. For TTL encoders (5 V differential), keep the cable under 50 meters to maintain signal integrity. The ABB RDCO-02C has a 12 V supply for HTL encoders, which helps with longer cable runs. Q: What does the “DDCS” fiber-optic link do? DDCS (Distributed Drive Control System) is ABB’s proprietary fiber-optic communication protocol. The ABB RDCO-02C sends the encoder data to the drive’s main control board via this link. The fiber is immune to electrical noise, which is critical in high-power drive environments. If the fiber is disconnected or damaged, the drive will fault immediately. _cuva Email: [email protected] Phone: 86 15340683922 Sales:Wu Jiedong Our products are guaranteed for 1 year, with new and original production stopped and imported spare parts. All prices listed on the official website are subject to confirmation by contact: Wu Jiedong (manager). Our product: brand new original packaging Our warranty: All new or repaired parts have a 12 month warranty period beginning Our payment: 100% telegraphic transfer of inventory items before shipment, conditions can be proposed! If you have any downtime spare parts that you cannot find, please feel free to call or use email to contact me. If there are issues that the product cannot solve, please contact me. Product prices can be negotiated. Please do not consider contacting me!
