YOKOGAWA ProSafe-RS

2. Explosion Protection Instrumentation in Zone 2/Division 2
2-13
TI 32S01J30-01E
 Ex “ec”/Type “n” Compliant Products
The gure below is an example of the conguration of Ex “ec”/Type “n” compliant products
that can be installed in hazardous areas. See the table “the list of Ex “ec”/Type “n” compliant
products” described in Appendix for detail.
F020205E.ai
<Hazardous area Zone 2>
<Non-Hazardous area>
Cabinet
Cabinet
*1 *1
Vnet/IP
Bus1
Bus2
Unit for Optical Bus
Repeater Module
Fiber-optic cable
SNT501/L1NT501
SNT401/L1NT401
L2SW for Bus1
L2SW: Layer 2 switch
SCU: Safety Control Unit
SNU: Safety Node Unit
SNU
SEA4D
AEP7D
SEA4D
SSB401/L1SB401
+T Branch
SSB401/L1SB401
+T Branch
SEC401/L1EC401
SCU
SNU
L2SW for Bus2
*1
24 V DC Power supply
*1*1
Ex "ec"/Type “n” device
Ex "ec"/Type “n” device
AEP7D
*1: Explosion-proof wiring that is dened in IEC/EN 60079-14 and the rules/standards of each country or region.
Figure Example of Ex “ec” Conguration
Dec. 3, 2021-00