Yokogawa ADMAG AXF - Manual (Page 48)

IM 01E20D01-01E 4-14
4. WIRING
(5) Wiring the Remote Flowtube (General-
Purpose Use, Submersible Type, Size 500
to 1000 mm (20 to 40 in.)) with Converters
1) Connection with the AXFA11 converter
Connect wiring as shown in the figure below.
I+
4-20mA out
Shortbar
I–
CURRENT OUT
AL+ AL– C SA A B SB
ALARM OUT
N/– L/+
POWER SUPPLY
EX2 EX1
EXCIT ATION
P– SI1+ SI2+ COM P+
PULSE OUT STATUS IN
SIGNAL
SO1+ COM SO2+
STATUS OUT
FUSE
2.5A 250V
AXFA11 converter
Converter
Remote
flowtube
F040217.EPS
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.
Remote flowtube
EX2
Excitation
cable
EX1
A
B
C
AXFC dedicated
signal cable
Figure 4.2.17 Wiring Diagram
IMPORTANT
A remote flowtube (size 500 to 1000 mm) cannot
be combined with AXFA14 converter.
(6) Wiring the Remote Flowtube (General-
Purpose Use, Submersible Type, Size 1100
to 2600 mm (44 to 104 in.)) with Convert-
ers
1) Connection with the AXFA11 converter
Connect wiring as shown in the figure below.
I+
4-20mA out
I–
CURRENT OUT
AL+ AL– C SA A B SB
ALARM OUT
N/– L/+
POWER SUPPLY
EX2 EX1
EXCIT ATION
P– SI1+ SI2+ COM P+
PULSE OUT STATUS IN
SIGNAL
SO1+ COM SO2+
STATUS OUT
FUSE
2.5A 250V
Shortbar
F040218.EPS
AXFA11 converter
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.
Remote flowtube
AXFC dedicated
signal cable
EX2
EX1
A
B
C
Excitation
cable
Figure 4.2.18 Wiring Diagram
IMPORTANT
A remote flowtube (size 1100 to 2600 mm)
cannot be combined with AXFA14 converter.
(7) Grounding
CAUTION
Be sure to connect the protective grounding of
the AXF remote flowtube with a cable of 2mm
2
or larger cross section in order to avoid electrical
shock to the operators and maintenance engi-
neers 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
Improper grounding can have an adverse affect
on the flow measurement. Ensure that the
instrument is properly grounded.