Yokogawa YFGW710 - Manual (Page 111)

B1-47
IM 01W01F01-01EN
n Example of a System Configuration Considering Cost and Conven-
ience
Convenience reduces and the system cost increases in reverse proportion to strengthened secu-
rity. It is also important to conduct risk analysis and consider balance to some degree.
For example, when the system is small and the security risk for field wireless devices that are
connected locally is considered to be low, it is possible to select a configuration as follows. How-
ever, the security strength of this configuration is lower than that of the configuration described
above.
▪ Firewall between YFGW710 and FCS is not required.
▪ The OPC server and GSGW coexist on a single PC.
▪ All PRM components coexist on a single PC.
▪ Field Wireless Configurator and Field Wireless Management Tool coexist on a single PC.
Level 4
Level 3
Level 2
Level 1
Level 0
EJX YTA
OUT
IN
Firewall
Process Information Network
(Ethernet or Vnet/IP BUS2)
Control Network
for Field Wireless (Ethernet)
CENTUM VP
ISA100 Gateway
(YFGW710)
Wireless Network
(ISA100.11a)
UTP or Optical cable
HIS/ENG
PRM Client &
PRM Server &
Field Comm. Server
GSGW
+
OPC Server
Firewall
OUT
IN
OUT
IN
FWC & FWMT
Firewall
FCS
ACL
L3 Switch
Local Field Network
(Ethernet)
Control Network
(Vnet or Vnet/IP)
ALE111
Wide-area Universal
Field Network
IP-VPN
EJX YTA
ISA100 Gateway
(YFGW710)
Wireless Network
(ISA100.11a)
FB0114.ai
Figure B1-14 Example of a System Considering Securty, Cost, and Availability