XNX Universal Transmitter
Section 2 - Installation and Operation
51
2.3 Options
2.3.1 Local HART Interface
Available with any sensor technology or option, this option
provides an external access to the HART interface in the
transmitter� An IS barrier inside the transmitter allows the user to
attach an external hand-held interrogator for programming and
configuration� The external interface is installed in the lower left
cable/conduit port of the transmitter and is intrinsically safe (IS)�
Figure 56. XNX Universal Transmitter with HART Interface IS Barrier installed
The HART protocol is a communication technology used with
smart process instrumentation, providing two-way digital
communication simultaneously with the 4-20mA analog signaling
used by traditional instrumentation equipment� For more
detailed information on HART, see the
HART Protocol
and
www�
hartcomm�org
�
Implementation of the HART protocol in the XNX transmitter:
• Meets HART 6�0 physical layer specification
• The physical layer is tested according to HART Physical
Layer Test Procedure, HCF_TEST-2�
• Data transfer rate: 1200 bps�
HART devices can operate in point-to-point or multidrop
configurations�
Caution:
Device address changes must be performed only by
qualified service personnel.
Point-to-Point Mode
In point-to-point mode, the 4–20 mA signal is used to
communicate one process variable, while additional process
variables, configuration parameters, and other device data are
transferred digitally via HART protocol (
Figure 57
)� The 4–20 mA
analog signal is not affected by the HART signal�
Control System
or Other Host Application
Multiplexer
Barrier
Handheld Terminal
Field Device
Note:
Instrument power is provided by an interface
or external power source that is not shown.
Figure 57. Point-to-Point Mode of Operation
Summary of Contents for XNX
Page 1: ...Technical Manual XNXTM Universal Transmitter ...
Page 2: ......
Page 6: ...XNX Universal Transmitter Table of Contents 4 Table of Contents ...
Page 11: ...XNX Universal Transmitter XNX Universal Transmitter Technical Manual 9 1 Introduction ...
Page 91: ...XNX Universal Transmitter XNX Universal Transmitter Technical Manual 89 3 Calibration ...
Page 104: ...XNX Universal Transmitter Section 3 Calibration 102 ...
Page 105: ...XNX Universal Transmitter XNX Universal Transmitter Technical Manual 103 4 Maintenance ...
Page 128: ...XNX Universal Transmitter Section 5 Warnings Faults 126 ...
Page 129: ...XNX Universal Transmitter XNX Universal Transmitter Technical Manual 127 6 Specifications ...
Page 152: ...XNX Universal Transmitter Section 6 Specifications 150 Figure 232 XNX BT Configuration ...
Page 161: ...XNX Universal Transmitter XNX Universal Transmitter Technical Manual 159 7 Control Drawings ...
Page 162: ...XNX Universal Transmitter Section 7 Control Drawings 160 7 1 XNX UL INMETRO ...
Page 163: ...XNX Universal Transmitter Section 7 Control Drawings 161 ...
Page 164: ...XNX Universal Transmitter Section 7 Control Drawings 162 ...
Page 165: ...XNX Universal Transmitter Section 7 Control Drawings 163 7 2 XNX UL CSA FM ...
Page 166: ...XNX Universal Transmitter Section 7 Control Drawings 164 ...
Page 167: ...XNX Universal Transmitter Section 7 Control Drawings 165 ...
Page 192: ...XNX Universal Transmitter Appendix B Modbus Protocol 190 ...
Page 193: ...XNX Universal Transmitter XNX Universal Transmitter Technical Manual 191 Appendix C Warranty ...
Page 195: ...XNX Universal Transmitter XNX Universal Transmitter Technical Manual 193 Index ...
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