2. Explosion Protection Instrumentation in Zone 2/Division 2
2-4
TI 32S01J30-01E
NI approved Products and Their Configuration Example
The figure below is an example of the configuration of NI approved products which can be
installed in hazardous areas.
For details, refer to Appendix for NI approved products.
F020106E.ai
<Hazardous area Class I, Division 2>
<Non-Hazardous area>
Cabinet
Cabinet
Vnet/IP
Bus1
Bus2
Unit for Optical Bus
Repeater Module
Fiber-optic cable
SNT501/L1NT501
SNT401/L1NT401
L2SW for Bus1
SSB401/L1SB401
+T Branch
SNU
SEA4D
SEA4D
SSB401/L1SB401
+T Branch
SEC401/L1EC401
SCU
SNU
L2SW for Bus2
L2SW: Layer 2 switch
SCU:
Safety Control Unit
SNU:
Safety Node Unit
Figure Example of the Configuration of NI
Dec. 3, 2021-00
