APC AXFA11G user manual Precautions for Wiring of Power Supply Cables, DC Power Connection

IMPORTANT

Do not wire the terminal without terminal sym- bols in terminal layout labels.

4.4.3Precautions for Wiring of Power Supply Cables

When connecting to the power supply, observe the points below. Failure to comply with these warnings may result in an electric shock or damage to the instrument.

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 protec- tive grounding wiring.

•To prevent electric shocks, ensure the electrical wiring cover (transparent) is attached.

•Install an external switch or circuit breaker as a means to turn the powe off (capacitance; 15A, conforming to IEC947-1 and IEC947-3). Locate this switch either near the instrument or in other places facilitating easy operation. Affix a “Power Off Equipment” label to this external switch or circuit breaker.

Wiring Procedure

1.Turn the instrument's power off, and remove the wiring cover (transparent).

2.Wire the power supply cable and the functional grounding cable to the power supply terminals.

I+ I–	SO1+ SO2+ COM		AL+	AL–	C	SA	A	B SB
CUR OUT	STATUS OUT		ALARM OUT				SIGNAL
	N/– L/+	EX1	EX2	P+	P–	SI1+	SI2+	COM
POWER SUPPLY		EXCITER		PULSE OUT			STATUS IN
Functional
grounding cable			Power supply cable

4. WIRING

4.4.4DC 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

m(ft)	420	(1380)
length
	280	(	920)
cable
	200 (		660)
Allowable	100	(	330)
			0	22	24	26	28.8
			20.4

Usable range E (V)

Cable cross section area: 1.25 mm2

Cable cross section area: 2 mm2

F0411-2.EPS

(3) Setting Power Supply Frequency

IMPORTANT

F0411.EPS

Figure 4.4.3 Electric Cable Wiring

3. Reattach the electrical wiring cover (transparent).

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.

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