ABB ACS880 Firmware Manual page 36

36 Program features
Star configuration with fiber optic cables (1)
Master
(ZCU) Control unit
FDCO
T R
T = Transmitter
R = Receiver
Star configuration with fiber optic cables (2)
Master
(ZCU) Control unit
FDCO
T R
T = Transmitter
R = Receiver
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Follower 1
(ZCU) Control unit
FDCO
T R
R T R T R T R T
MSTR CH0 CH1 CH2
NDBU
Follower 1
(ZCU) Control unit
FDCO
T R
R T R T R T R T
CHx CHx CHx CHx
NDBU
X13 = REGEN
Follower 2
(BCU) Control unit
RDCO
CH2
T R
Follower 3
(ZCU) Control unit
Follower 2
(BCU) Control unit
RDCO
CH2
T R
Follower 3
(ZCU) Control unit