Yokogawa ADMAG AXR Manual de usuario descargar pdf (Pagina 33)

<4. WIRING>

4-9

IM 01E30D01-01EN

IMPORTANT

Precaution for Pulse Output

• As this is a transistor contact (insulated

type), give attention to proper voltage and

polarity when wiring.

• Do not apply a voltage larger than 30 V DC

or a current larger than 120 mA in order to

prevent damage to the instrument.

• Wheninputlterconstantoftheelectronic

counter is large in relation to the pulse width,

the signal will decrease and the count will not

be accurate.

• I

f the input impedance of the electronic

counter is large, an induction noise from

the power supply may result in inaccurate

counts.Useashieldcableorsufciently

reduce the input impedance of the electronic

counterwithintheelectromagneticowmeter

pulseoutputspecicationrange.

• The load resistance for pulse output is

necessary. Refer to Table 4.6.3.

• N

either no load resistance nor too small

value of load resistance for pulse output will

give a damage to the instrument.

IMPORTANT

Precaution for Status Output and Alarm Output

• As this is a transistor contact (insulated

type), give attention to proper voltage and

polarity when wiring.

• Do not apply a voltage larger than 30V DC

or a current larger than 120 mA in order to

prevent damage to the instrument.

• This output cannot switch an AC load. To

switch an AC load, an intermediate relay

must be inserted as shown in Table 4.6.2.

* The alarm output operates from open (normal) to

closed (alarm occurrence) in the default value (as setup

upon plant shipment). Changes can be made via the

parameter settings.

NOTE

Precaution for Pulse Output

For pulse output from the DO terminal,

parameters must be set. Refer to “6. Parameter

Description” in this user’s manual.

NOTE

Precaution for Status Output and Alarm Output

For status output and alarm output from the DO

terminal, parameters must be set. Refer to “6.

Parameter Description” in this user’s manual.

(3) Simultaneous Current-Pulse Output

When simultaneous output of current and pulse

output are used, no communication is possible in

some cases.

Refer to Table 4.6.3 as wiring examples.

eferto(2)forspecicationsandprecautionsofthe

pulse output.

(4) The Wiring of Digital External Indicator

Using Current Output

Refer to Table 4.6.4 as wiring examples.

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 193 194

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Yokogawa ADMAG AXR Manual de usuario Pagina 33

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