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Daisy chaining is a set up by which the output of one VFD is tied to the input of the next VFD downstream.
This allows for a master/follower configuration. The “master” fan remains in LOCAL mode, while all the
“followers” are set to REMOTE. The followers will then rotate at the same speed as the master fan.
Note:
Any fan in the daisy chain can be set to LOCAL (LOC) mode for local control.
However, all of the fans
downstream will begin to rotate at the speed of that fan, NOT the designated master.
Each follower must be wired according to the diagram below. The VFD designated as the master will be
wired in exactly the same manner, but
without wiring ANYTHING into terminals 2 and 3 on the VFD.
KEY POINTS FOR DAISY CHAINING:
1)
Wire for daisy chaining must be: 2-conductor with ground,
18 AWG
, double shielded.
2)
Based on the wiring diagram, please note that only the “speed output to downstream drive” end of the
daisy chain wire shield is connected to the drive at terminal 1. The shield on the input side (terminals 2 and
3) is
not
connected.
