YOKOGAWA Models AFV40S AFV40D Field Control Unit
l Memory Protection During Power Failure
Battery
Battery Backup for Main Memory: Max. 72 hours
Battery Recharge Time: Min. 48 hours
l
READY Contact Output
3 terminals (NC, NO and C)
Contact Points open or close during FCU failure
Contact Rating:
Rated voltage: 250 V AC, max. 30 V DC
Rated current: Max. 2 A
Rated power supply: Max. 125 VA
Module Configuration in FCU
Processor Module (CP471 or CP461):
2 modules for dual-redundant
configuration.
A dual-redundant configuration is enabled
by using 2 identical modules with same
model code (CP471 or CP461)
Installation Restrictions
To install Optical ESB Bus Node Units (ANB11)
or ESB Bus Node Units (ANB10) in a remote
location, use the Optical ESB Bus Repeater Master
Module (ANT401 or ANT411) to connect them with
an optical fiber cable. To install Optical ESB Bus
Repeater Master Modules in the FCU, install a pair
of modules in slots 1 to 6 from right to left according
to the number of branches. In a single configuration,
install the individual modules in slots 1, 3, and 5 in
order from right to left. For details, see “Optical ESB
Bus Repeater Module” (GS 33J60F51-01EN/GS
33J60F52-01EN).
For the restrictions and notes for installing I/O
modules, see “FIO System Overview” (GS 33J60A10-
01EN).
