Yokogawa AXFA14G/C - Manual (Page 18)

IM 01E20C02-01E 4-6
4. WIRING
4.4.5 Grounding
CAUTION
Be sure to connect the protective grounding of
the AXFA14 with a cable of 2mm
2 or larger cross
section in oder to avoid electrical shock to the
operators and maintenance engineers and to
prevent the influence of external noise.
Connect the grounding wire to the
mark.
The grounding should satisfy Class D require-
ments (ground resistance, 100
⍀ or less).
In case of TIIS Flameproof type, the grounding
should satisfy Class C requirements (ground
resistance, 10
⍀ or less) or class A requirements
(ground resistance, 10
⍀ or less).
For explosion proof type except TIIS, follow the
domestic electrical requirements as regulated in
each country.
IMPORTANT
When optional code A (lighting protector) is
selected, the ground should satisfy Class C
requirements (grounding resistance, 10
⍀ or less).
• The protective grounding terminals are located
on the inside and outside of the terminal area.
Either terminal may be used.
• Use 600V vinyl insulation wires as the grounding
wires.
F0412.EPS
Protective grounding terminals
Figure 4.4.4 Protective Grounding Terminal Location
4.4.6 Wiring the Remote Flowtube
with the AXFA14 Converter
WARNING
Before wiring, be sure that the power supply for
AXFA14 converter has been turned off to
prevent an electrical shock.
(1) Connection with the Remote Flowtube
(General-Purpose Use, Submersible Type,
Sanitary Type, Size 2.5 to 400 mm (0.1 to
16 in.))
Connect wiring as shown in the figure below.
AXFC dedicated
signal cable
EX2
EX1
A
B
C
Excitation cable
EX1
EX2
C
SA
A
B
SB
F0413.EPS
Converter
Remote
flowtube
SA
A
B
SB
C
EX1
EX2
Taping*
A
B
Taping*
C
EX1
EX2
* Individually tape and insulate the
shields corresponding to SA and
SB on the remote flowtube side.
AXFA14 Converter
Remote flowtube
Figure 4.4.5 Wiring Diagram