3. Explosion Protection Instrumentation in Zone 2/Division 2
3-28
TI 33Q01J30-01E
<Hazardous area Zone 2>
<Non-hazardous area>
F030208.ai
Cabinet
L2SW
ESB Bus Node Unit
ANB10D/A2BE2D
ESB Bus Node Unit
ANB10D/A2BE2D
L2SW
Fieldbus
Cabinet
A2MMM843
or
A2MDV843
A2MMM843
or
A2MDV843
A2EN402
A2BN3D,
A2BN4D,
or A2BN5D
A2BN3D
A2NN30D
A2EN501
EC401
SB401
I/O Adaptors
I/O Adaptors
Ex "ec"/Type “n” device
Ex "ec"/Type “n” device
Communication
Module
Transient
Protection
Transient
Protection
*1
*1
*1
*1
*1
24 V DC
Power
Supply
24 V DC
Power
Supply
24 V DC
Power
Supply
(*2)
Transient
Protection
(*2)
Transient
Protection
(*2)
(*2)
*1
*1: Explosion-proof wiring that is defined in EN/IEC 60079-14, and the rules/standards of each country or region.
*2:
Transient protection shall be provided that is set at a level not exceeding 119 V d. c. at the supply terminal of A2BN3D, A2BN4D,
and A2BN5D to the equipment.
Figure Example of the configuration of Ex “ec”/Type “n” approved products 2
Precautions
Refer to the latest edition of CENTUM VP Explosion Protection (IM 33K01J30-50E) for the
installation and the precaution for Ex “ec”/Type “n” compliant devices.
Refer to the latest edition of CENTUM VP Explosion Protection (IM 33K01J30-50E) for the
installation, the precaution, and maintenance and repair for N-IO field enclosure.
This document can be found at the following web site:
https://partner.yokogawa.com/
June 23, 2022-00
