2. CENTUM and Explosion Protection Instrumentation
2-6
TI 33Q01J30-01E
Overview of Connecting N-IO Components
O
verview of Connecting A2BN3D adaptor base plate for ATEX, IECEx
, and
UKEX
A2BN3D Base plate for adaptor can be connected to the intrinsic safety devices installed in
Zone 0, Zone 1, and Zone 2 using a barrier and explosion-proof wiring as shown in the following
figures.
They can be connected to Intrinsic safety devices installed in Zone 0, 1, and 2 using Explosion-
proof wiring that is defined in EN/IEC 60079-14 and the rules/standards of each country or
region.
They can be connected to Ex “ec”/Type “n” devices installed in Zone 2 using explosion-proof
wiring that is defined in EN/IEC 60079-14 and the rules/standards of each country or region.
And they can be connected to flame-proof devices using explosion-proof wiring that is defined in
EN/IEC 60079-14 and the rules/standards of each country or region.
N-IO field enclosure A2NN70D is equipped with A2BN3D inside the enclosure, thus the following
figure is also applicable to A2NN70D. In the case of A2NN70D, replace A2BN3D with A2NN70D.
N-IO node unit including A2BN3D and FCS or node unit (24 V DC feeding type) can be installed
in Zone 2 by mounting in a keyed metal cabinet with protection rating of IP54 or higher.
A2BN3D Base plate for adaptor
F020311.ai
Zone1
Zone2
Non-Hazardous Area
Zone0
Safety
Barrier
Safety
Barrier
Safety
Barrier
Flameproof
devices
Intrinsic safety
devices
Type “n”
Ex "ec" device
Intrinsic safety
devices
Intrinsic safety
devices
*1
*1
*1
*1
*1
*1:
Explosion-proof wiring that is defined in EN/IEC 60079-14 and the rules/standards of each country or region.
Figure Connection of A2BN3D for ATEX, IECEx, and UKEX (1)
Dec .3, 2021-00
