Configured for fiber optic data exchange in ACS800 drive architectures, the ABB RDCO-02C (RDCO-02C DDCS Communication Adapter) provides direct physical execution of high-speed optical signal transmission between control units and external interface modules.

Component Identification

• Model: RDCO-02C

• Module Type: DDCS Fiber Optic Communication Adapter

• System Family: ACS800 Series

Hardware Specifications

Industrial Control & Drive Integration

The RDCO-02C supports backplane bus communication velocity settings compatible with ACS800 RMIO and BCU control units. Firmware flash compatibility is maintained through the DDCS protocol, ensuring that optical communication parameters remain aligned with drive firmware versions. The module enables I/O density scaling by allowing multiple expansion and follower units to be synchronized over the fiber optic network without degrading signal integrity.

Ordering Information

• One (1) RDCO-02C Communication Adapter Module.

• Mounting hardware for RMIO/BCU board integration.

• Technical interface documentation.

Field Installation Guidelines

• Mounting: Attach the module to the 20-pin header on the host RMIO or BCU control board; ensure all pins are aligned before applying pressure to seat the connector.

• Fiber Routing: Observe minimum bend radii for fiber optic cables to prevent attenuation; ensure optical connectors are clean and free of dust before insertion.

• Grounding: While the fiber optic link provides inherent isolation, ensure the host drive control board is properly grounded to the cabinet chassis to prevent static accumulation.

• Channel Assignment: Adhere to defined channel allocations (CH0-CH3) according to the specific application requirements for Master/Follower or Fieldbus coordination.

Frequently Asked Questions

• Is the RDCO-02C hot-swappable? No. All power to the drive control unit must be removed before installing or removing the adapter to prevent short-circuiting the 5 V DC supply.

• What protocols are supported? The module implements the ABB DDCS (Distributed Drives Communication System) protocol over fiber optic physical layers.

• Can I mix data rates on different channels? The adapter supports 1, 2, or 4 Mbit/s; ensure the baud rate settings match the configuration of the connected slave devices.

• How are communication errors diagnosed? System status is reported through the drive control unit's diagnostic interface; check for link-loss or data-timeout faults in the drive logs.

• What is the purpose of the coated circuit board? The conformal coating provides enhanced chemical and moisture resistance for operation in harsh industrial environments.

• Does the module require external power? No, it operates on the +5 V DC power supplied through the 20-pin header from the host drive control board.

• How many devices can be connected? The module provides 4 independent optical channels (CH0-CH3), each supporting specific drive-to-drive or control-to-drive links.

• Is fiber optic isolation maintained? Yes, the optical components provide full galvanic isolation, effectively eliminating ground loop interference in high-voltage drive cabinets.