Yokogawa AXFA14G/C - Manual (Page 12)

IM 01E20C02-01E 4-6
4. WIRING
4.4.4 DC Power Connection
When using DC power as the power supply for the
converter, give attention to the following points.
(1) Connecting Power Supply
IMPORTANT
Do not connect power supply with reversed
polarities.
L/+ terminal: connect +
N/– terminal: connect –
IMPORTANT
Do not connect power supply with 100 to 240 V
AC or 100 to 120 V DC in the case of a 24 V
power supply version (power supply code 2).
It will give a damage to the converter.
(2) Required Power Supply Voltages
IMPORTANT
When using a 24 V power supply, the specifica-
tion for the supply voltage is 24 V (–15% to
+20%), but the input voltage of the converter
drops due to cable resistance therefore it must
be used within the following ranges.
Supply Voltage and Cable Length
0
20.4 22 24 26 28.8
200 ( 660)
446 (1460)
600 (1970)
796 (2610)
F0411.EPS
Cable cross section area: 1.25 mm 2
Cable cross section area: 2 mm 2
Allo
w
a
b
le cab
le length m(ft)
Usable range E (V)
(3) Setting Power Supply Frequency
IMPORTANT
Set the local Commercial power frequency in
order to eliminate the effect of induction noise
from the Commercial power supply.
Refer to “Chapter 6: Parameter Description” in
this manual.
Parameter No.: J30 and J31
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