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Table 4.6.1
Connecting device and Applicable
maximum cable length (guideline)
Connecting device
Name
Model
Signal
EA1
Conditioner
EA2
Card
AAM11
I/O Module
AAM11B
AAI143
Analog I/O
AAI141
Module
AAI841
Not applicable
(for FIO)
AAI135
AAI835
Analog I/O
Module (for
SAI143
Prosafe-RS)
SDBT
Distributor
SDBS
VJA1
JUXTA
VJA4
VJA7
Communication Requirement:
BRAIN
Communication signal:
BRAIN communication signal
(superimposed on 4 to 20 mA DC signals)
Conditions of Communication Line:
Supply Voltage: 20.6 to 42 V DC
Load Resistance: 2 50 to 600 Ω
(including cable resistance)
Read Figure 4.6.3.
Communication Distance:
Up to a distance of 2km when a CEV cable is
used (Read Table 4.6.2 to Table 4.6.7)
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
Maximum length of cable
(rough guideline)
Cable
Cable
with cross
with cross
section of
section of
2 mm
1.25 mm
2
2
2 km
2 km
2 km
2 km
2 km
2 km
Not applicable
1.4 km
0.8 km
2 km
2 km
2 km
2 km
<4. WIRING>
600
E−14.7
R=
0.0236
External
Load
Resistance
250
R (Ω)
14.7
Power supply voltage E (V DC)
Figure 4.6.3 Relationship between Power supply
voltage and external load resistance
HART
Communication signal:
HART communication signal (superimposed
on 4 to 20 mA DC signals)
Note: HART is a registered trademark of the FieldComm
Group. Use the setting tool that has the same
protocol revision as AXR. It is not possible to
communicate with HART7 AXR in using HART 5 or
HART 6 setting tool.
Conditions of Communication Line:
Supply Voltage: 20.6 to 42 V DC
Load Resistance: 2 50 to 600 Ω
(including cable resistance)
Read Figure 4.6.3.
HART Protocol Revision
HART protocol revision can be selected from 5 or
7 when ordering. ("-J" only)
The protocol revision can be changed by user
configuration.
The HART protocol revision at the time of
shipment is shown by the last number at the
serial number column of the name plate.
Note: Protocol revision supported by HART configura-
tion tool must be the same or higher than that of
AXR.
4-8
Digital
Communication
Range
(BRAIN or HART)
20.6
28.9
42
F0416.ai
IM 01E30D01-01EN
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