The RDCO-0x DDCS Communication options are add-on modules for the
• RMIO Motor Control and I/O board (also part of RDCU control units)
• BCU control units.
RDCO modules are available factory-installed as well as retrofit kits.
The RDCO module includes the connectors for fiber optic DDCS channels CH0, CH1, CH2 and CH3. The usage of these channels is determined by the application program; see the Firmware Manual of the drive. However, the channels arenormally assigned as follows:
CH0 – overriding system (eg. fieldbus adapter)
CH1 – I/O options and supply unit
CH2 – Master/Follower link
CH3 – PC tool (ACS800 only).
There are several types of the RDCO. The difference between the types is the optical components. In addition, each type is available with a coated Circuit Board, this being indicated by a “C” suffix, eg. RDCO-03C.

The optical components at both ends of a fiber optic link mustbe of the same type for the light intensity and receiversensitivity levels to match. Plastic optical fiber (POF) cablescan be used with both 5 MBd and 10 MBd optical components.10 MBd components also enable the use of Hard Clad Silica(HCS) cables, which allow longer connection distances thanksto their lower attenuation.

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