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3. Explosion Protection Instrumentation in Zone 2/Division 2
3-21
TI 33Q01J30-01E
Example of a Connection
Connecting ESB Bus Node Unit and a Device Installed in Class I, Division 2
<Hazardous area Class I, Division 2>
<Non-hazardous area>
F030116.ai
FCU with a cabinet
AEA4D
CSA NI equipment
Conduit wiring
Figure Connecting ESB Bus Node Unit and a Device Installed 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 (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.
Dec. 3, 2021-00