3. Explosion Protection Instrumentation in Zone 2/Division 2
3-16
TI 33Q01J30-01E
Power Supply Wiring
When field control unit (for Vnet/IP), node unit for FIO, power distribution unit and power supply
module are installed in a hazardous area in Class I, Division 2, wire a power supply cable from a
non-hazardous area by explosion-proof wiring (including metal conduit wiring).
When AED5D and A1BD5D are combined with ADV151, ADV161, ADV551 and ADV561, install
an explosion-proof wiring defined in the relevant country for the wiring outside of the external
power supply cable cabinet.
The power cable of N-IO field enclosure must be wired in accordance with the instructions
provided in the related GS (General Specifications), TI (Installation Guidance) and IM (User’s
Manuals).
Signal Wiring
When an optical cable is installed in Class I, Division 2, general wiring defined in the relevant
country is available. Optical cable does not emit energy to cause air explosion.
Install explosion-proof wiring defined in the relevant country for the following signal wiring:
• Wiring contact output terminals of field control unit outside of a cabinet
• Wiring Vnet/IP cable and ESB bus cable outside of a cabinet
• Wiring AAP135 outside of a cabinet when it is used as the source device (*1)
General wiring defined in the relevant country can be installed according to the indicated
electrical parameters for signal wiring of AAP135 outside of a cabinet when it is used as the
load device (*1).
• Use DC power supply compliant with the Standard for Explosion Protection for combination
of ADV151 and AED5D or A1BD5D, or that of ADV161 and AED5D or A1BD5D in contact
input mode and voltage input mode. Connection according to the parameters of this power
supply makes signal wiring outside of the cabinet compliant with the local standard. Please
read the instruction on contact input mode wiring and the instruction on voltage input mode
when you actually install wiring.
• Wiring outside of a cabinet in voltage output mode by a combination of ADV551 and AED5D
or A1BD5D, or ADV561 and AED5D or A1BD5D.
Wiring contact output mode outside of a cabinet according to the indicated electrical
parameters is compliant with the local standard.
• Wiring outside of a cabinet to ALR111, ALR121 or ALE111.
• Wiring outside of a cabinet to ALF111
When a barrier for field bus available in Class I, Division 2 is mounted in the same cabinet
and connected, wiring to the field devices outside of the cabinet can be a general wiring
defined in the relevant country.
• The signal cable of N-IO field enclosure must be wired in accordance with the instructions
provided in the related GS (General Specifications), TI (Installation Guidance) and IM
(User’s Manuals).
*1:
AAP135 is “the source device” in case of voltage-free contact input and voltage pulse input (when connected to signal names
IN
B and IN
C). In other connections, it is “the load device.”
Dec. 3, 2021-00
