Two Drive Systems In 12 - Pulse Serial / Sequential Configuration; With Master / Follower Link - ABB DCS 600 MultiDrive Series Manual

Chapter 4 – Twelve–Pulse Serial / Sequential Configurations with DCS 600
Two drive systems in 12 – pulse serial / sequential configuration (s. Fig. 4/1)

with master / follower link

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In this configuration the master-follower link transmits the torque reference.
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DCS 600 Manual for 12 – Pulse Operation
Figure 4/2