YOKOGAWA ProSafe-RS

2. Explosion Protection Instrumentation in Zone 2/Division 2
2-16
TI 32S01J30-01E
 Installing ProSafe-RS/ProSafe-RS Lite equipment and Associated Field
Devices in Zone 2
<Hazardous area Zone 2>
<Non-Hazardous area>
F020206E.ai
Cabinet
Fiber-optic cable
Cabinet
Vnet/IP
Bus1
Bus2
Unit for Optical Bus
Repeater Module
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
*1 *1
AEP7DAEP7D
*1
24 V DC Power supply
*1
Ex “ec”/Type “n” device
*1
Ex “ec”/Type “n” device
L2SW: Layer 2 switch
SCU: Safety Control Unit
SNU: Safety Node Unit
*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 Connection (Installation in Zone 2)
Dec. 3, 2021-00