The RDCO-03 module includes the connectors for fiber optic DDCS channels CH0, CH1, CH2 and CH3. The usage of these channels is determined by the application but are normally assigned to the following: CH0 – overriding system (e.g. fieldbus adapter) - 5 MBd. CH1 – I/O extensions - 5MBd. CH2 – Master/Follower link - 5 MBd. CH3 – PC tools (such as DriveWare) - 5 MBd.