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12. OUTLINE
12.1 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.
Read Section 4.6.
• 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 (Read Figure 12.1)
HIGH level
LOW level
Figure 12.1 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: T he ADMAG AXR can be connected with almost
all distributors, signal conditioner cards, and I/O
modules except certain devices.
Read 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 reading the supply voltage specifi-
cations and the description in Section 4.6.
Connecting device
Name
Signal
Conditioner
Card
I/O Module
Analog I/O
Module
(for FIO)
Analog I/O
Module (for
Prosafe-RS)
Distributor
JUXTA
Communication Requirement:
BRAIN
Communication Signal:
BRAIN communication signal (superimposed on 4 to
20 mA DC signals)
Conditions of Communication Line:
0 to 2 V
Supply Voltage: 20.6 to 42 V DC
0 V
Load Resistance: 250 to 600 Ω (including cable
F1201.ai
resistance)
Read Figure 12.2.
Communication Distance: Up to a distance of 2 km
when a CEV cable is used
Read Section 4.6.
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
External
Load
Resistance
R (Ω)
Figure 12.2 Relationship Between Power Supply Volt-
<12. OUTLINE>
Maximum length of cable
(rough guideline)
Cable with
Model
cross section
of 2 mm
EA1
2 km
EA2
AAM11
2 km
AAM11B
AAI143
2 km
AAI141
AAI841
Not applicable Not applicable
AAI135
AAI835
SAI143
1.4 km
SDBT
2 km
SDBS
VJA1
VJA4
2 km
VJA7
600
E−14.7
R=
0.0236
250
14.7
20.6
Power supply voltage E (V DC)
age And External Load Resistance
12-1
Cable with
cross section
of 1.25 mm
2
2
2 km
2 km
2 km
0.8 km
2 km
2 km
Digital
Communication
Range
(BRAIN or HART)
28.9
42
F1202.ai
IM 01E30D01-01EN
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