YOKOGAWA AXFA14C User Manual

<4. Wiring>
43
IM 01E20A01-01EN
WARNING
• Ensure that the power supply is OFF in order to
prevent electric shocks.
• Ensure the protective grounding terminal is
grounded before turning the power on.
• Use insulating sleeve crimp terminals (for 4-mm
screws) for the power supply wiring and protective
grounding wiring.
• Install an external switch or circuit breaker as a
means to turn the power off (capacitance; 15A,
conforming to IEC60947-1 and IEC60947-3).
Locate this switch either near the instrument or
inotherplacesfacilitatingeasyoperation.Afxa
“PowerOffEquipment”labeltothisexternalswitch
or circuit breaker.
Wiring Procedure for AXFA14
1. Turn the instrument’s power off.
2. Wire the power supply cable and the functional
grounding cable to the power supply terminals.
F0439.ai
Functional grounding cable
Power supply
cable
Figure 4.3.7 Electric Cable Wiring for AXFA14 Remote
Converter
(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specication
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.
0
20.4 22 24 26 28.8
200 ( 660)
446 (1460)
600 (1970)
796 (2610)
F0440.ai
Cable cross section area: 1.25 mm
2
Cable cross section area: 2 mm
2
Allowable cable length m(ft)
Usable range E (V)
Figure 4.3.8 Supply Voltage and Cable Length for AXFA14
Remote Converter
3) Setting Power Supply Frequency
IMPORTANT
Set the local commercial power frequency in order to
eliminate the effect of induction noise from the power
supply.
Referto“ParameterDescription”intheuser’smanual
of the AXFA14G/C Magnetic Flowmeter Remote
Converter [Hardware Edition/ Software Edition] (IM
01E20C02-01E).
Parameter No.: J30 and J31
(5) Grounding
CAUTION
Be sure to connect the protective grounding of the
AXFA14 Remote Converter with a cable of 2mm
2
or
larger cross section in order to avoid electrical shock
to the operators and maintenance engineers and to
preventtheinuenceofexternalnoise.
Connect the grounding wire to the
mark.
The grounding should satisfy Class D requirements
(groundingresistance,100Ωorless).
In case of TIIS Flameproof type, the grounding should
satisfy Class C requirements (grounding resistance,
10Ωorless)orclassArequirements(grounding
resistance,10Ωorless).
For explosion proof type except TIIS, follow the
domestic electrical requirements as regulated in each
country.
Wiring
4

YOKOGAWA AXFA14C Specifications

General

Brand	YOKOGAWA
Model	AXFA14C
Category	Measuring Instruments
Language	English