Yokogawa ADMAG AXR - Manual (Page 153)

12-1
IM 01E30D01-01EN
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n STANDARD SPECIFICATIONS
 Converter
The contents of (*1) and (*2) described in the
converter specifications 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-
figuration 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
flowmeter.
Note 2: Connecting with the commercial AC power supply
will damage the flowmeter. 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 specifications and the description in “WIRING
EXAMPLE”.
Connecting device
Maximum length of cable
(rough guideline)
Name Model
Cable with
cross section
of 2 mm 2
Cable with
cross section
of 1.25 mm 2
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:
10 kΩ or more at 2.4 kHz
600
250
14.7 20.6 28.9 35
Power supply voltage E (V DC)
R= 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
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