Yokogawa ADMAG AXR Uživatelský manuál stáhnout pdf (Strana 153)

12-1

IM 01E30D01-01EN

<12. OUTLINE>

n STANDARD SPECIFICATIONS

 Converter

The contents of (*1) and (*2) described in the

converterspecicationsarefollows.

*1: One output can be selected from pulse, alarm, or

status through the parameter setting.

2: For models without an indicator, the con-



gurationtool(Suchashandheldterminalor

FieldMate, etc.) is necessary to set or change

parameters.

Excitation Method:

• Dual frequency excitation: Size 25 to 200 mm (1 to

8 in.)

Output Signals:

Current output and digital output can be carried out

simultaneously.

Refer

to“WIRINGEXAMPLE”.

• Current output: 4 to 20 mA DC, two-wire system

Output range: 3.8 to 20.5 mA (–1.25 to 103.13%)

•

Digital output (*1):

Transistor contact output, open collector

Contact rating: 30 V DC, 120 mA DC

Low level: 0 to 2 V DC (refer to Figure 1)

HIGH level

LOW level

0 V

0 to 2 V

F1201.ai

Figure 1 High and Low levels

(transistor contact output)

Current Output Status at System Alarms (Burnout)

Up-scale: 110%, 21.6 mA DC or more (standard)

Down-scale: –5%, 3.2 mA DC or less

Supply Voltage:

14.7 to 42 V DC for general-purpose use and explo-

sion proof type

14.7 to 32 V DC for lightning protector

(optional code A)

Note 1: Supply voltage means the voltage necessary to pro-

vide between the power terminals of the magnetic

owmeter.

Note 2: Connecting with the commercial AC power supply

willdamagetheowmeter.BesuretousetheDC

power supply in the predetermined range.

Note3:TheADMAGAXRcanbeconnectedwithalmost

all distributors, signal conditioner cards, and I/O

modules except certain devices.

Referring to the following table for Yokogawa’s

devices, choose an appropriate connecting device

and the corresponding length of cable.

For devices other than those in the table, decide

on the connection by referring to the supply volt-

agespecicationsandthedescriptionin“WIRING

EXAMPLE”.

Connecting device

Maximum length of cable

(rough guideline)

Name Model

Cable with

cross section

of 2 mm

Cable with

cross section

of 1.25 mm

Signal

Conditioner

Card

EA1

EA2

2 km 2 km

I/O Module

AAM11

AAM11B

2 km 2 km

Analog I/O

Module

(for FIO)

AAI143 2 km 2 km

AAI141

AAI841

AAI135

AAI835

Not applicable Not applicable

Analog I/O

Module (for

Prosafe-RS)

SAI143 1.4 km 0.8 km

Distributor

SDBT

SDBS

2 km 2 km

JUXTA

VJA1

VJA4

VJA7

2 km 2 km

Communication Requirement:

BRAIN

Communication Signal:

BRAIN or HART communication signal (superim-

posed on 4 to 20 mA DC signals)

Note: HART is a registered trademark of the HART Com-

munication Foundation.

Conditions of Communication Line:

Supply Voltage: 20.6 to 42 V DC

Load

Resistance:250to600Ω(includingcable

resistance)

Refer to Figure 2.

Communication Distance: Up to a distance of 2 km

when a CEV cable is used

Refer

to“WIRINGEXAMPLE”.

LoadCapacitance:0.22μForless

Load Inductance: 3.3 mH or less

Distance from other Power Line: 15 cm (6 in.) or

more (Avoid parallel wiring.)

Input Impedance of Communicating Device:

kΩormoreat2.4kHz

600

250

14.7 20.6 28.9 35

Power supply voltage E (V DC)

0.0236

E−14.7

F1202.ai

Digital

Communication

Range

(BRAIN or HART)

External

Load

Resistance

R (Ω)

Figure 2 Relationship Between Power Supply Voltage

And External Load Resistance

12. OUTLINE

1 2 ... 148 149 150 151 152 153 154 155 156 157 158 ... 193 194

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