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3. Explosion Protection Instrumentation in Zone 2/Division 2
3-23
TI 33Q01J30-01E
Installing a FCS or ESB Bus Node Unit in Class I, Division 2
FCU
AFV30D/A2BE1D
ESB Bus Node Unit
ANB10D/A2BE2D
AEA4D
AEA4D
AEP7D
L2-switch
L2-switch
FCU
AFV30D/A2BE1D
L2-switch
L2-switch
Cabinet
Conduit wiring
Grounding for explosion protection
(based on NEC or laws defined in each country)
<Non-hazardous Area>
Conduit wiring
FM NI equipment
<Hazardous area Class I, Division 2>
F030114.ai
100 V AC Power supply
220 V AC Power supply
or
24 V DC Power supply
Figure Installing a FCS or ESB Bus Node Unit in Class I, Division 2
• To connect with a field device, electrical parameters of each device should be met.
• To wire the devices that do not indicate electrical parameters, apply an explosion-proof
wiring (including threaded conduit wiring) defined in NEC (National Electrical Code:
ANSI/NFPA-70) or in each country. In addition, wiring the devices that indicate electrical
parameters with the compliant devices can be a general wiring defined in each country.
• Use L2 switch (Network Devices) which can be installed in a hazardous area in Class I,
Division 2.
Dec. 3, 2021-00