YOKOGAWA Centum ANT421, Manual, Page: 6 / 11

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GS 33J60F55-01EN
n
EXAMPLE OF CONNECTION STRUCTURE
l
Example of Chain and Star Connection
In the case of FCU (for N-IO) or FCU (for RIO System Upgrade) (*2)
TM1
READY
FUSE RL1 CN1 (PSU-L) TM2 100-120V AC
CN2 (PSU-R)
EC401 EC401 ANT421
ANT421 ANT421
ANT421
ANT421 ANT421
Optical ESB Bus Node Unit
(for dual-redundant Optical ESB Bus)
ALF111 ALF111 ALR121 ALR121 ANT522 ANT522
Optical ESB Bus Node Unit
(for dual-redundant Optical ESB Bus)
ALF111 ALF111 ALR121 ALR121 ANT522 ANT522
N-IO
A2EN501 A2PW50

A2PW50

A2EN501
A2NN

0D (*1)
N-IO
A2EN501 A2PW50

A2PW50

A2EN501
A2NN

0D (*1)
ANT421 （ IO1, 2 ） ： + A2EE2A-T (Connector unit with
terminator for ESB Bus)
ANT421
（
IO3, 4
） ：
+ A2EE2A-N (Connector unit for ESB Bus)
ANT421 （ IO5, 6 ） ： + A2EE2A-N (Connector unit for ESB Bus)
FCU
(for N-IO / for RIO System Upgrade)
Max. length of
optical cable
4 km or less
ANT522: + A2EE3A-TN (Connector unit with
terminator for ESB Bus)
ANT522: + A2EE3A-TN (Connector unit with
terminator for ESB Bus)
Max. length of
optical cable
4 km or less
Optical ESB Bus Node Unit
(for dual-redundant Optical ESB Bus)
ALF111 ALF111 ALR121 ALR121 ANT522 ANT522
Optical ESB Bus Node Unit
(for dual-redundant Optical ESB Bus)
ALF111 ALF111 ALR121 ALR121 ANT522 ANT522 ANT421 ANT421
ANT522: + A2EE3A-TN (Connector unit with terminator for ESB Bus)
ANT522 ： + A2EE3A-NN (Connector unit for ESB Bus)
ANT421
：
+ A2EE2A-T (Connector unit with terminator for ESB Bus)
Total max.
length of optical cable;
8 km or less
F04E.ai
N-IO node N-IO node
Total max.
length of optical cable;
8 km or less
Max. length of
optical cable
4 km or less
Max. length of
optical cable
4 km or less
Max. length of
optical cable
4 km or less
Total max.
length of optical cable;
8 km or less
Max. length of
optical cable 4 km or less
A2EN501:
optical ESB bus (0 ～ 5 km)
for uplink
optical ESB bus ((0 ～ 5 km)
for downlink
（ A2EN501-S11

0 ）
A2EN501: optical ESB bus (0
～ 5 km)
for uplink
optical ESB bus (0 ～ 5 km)
for downlink
（ A2EN501-S11

0 ）
*1: Connectable Node Interface Unit
A2NN30D for FCU (for N-IO)
A2NN10D or A2NN20D for FCU (for RIO System Upgrade)
*2: For detail about each FCU, refer to “N-IO System Overview” (GS 33J62A10-01EN), and “Field Control Unit, Cabinet Utility
Kit (for RIO System Upgrade)” (GS 33J64E10-01EN)
Figure Example of Chain and Star Connection (In the case of FCU for N-IO or FCU for RIO System Upgrade)
Aug. 6, 2021-00