Micro Motion, ELITE, and ProLink are registered trademarks of Micro Motion, Inc.,
Boulder, Colorado. Rosemount and SMART FAMILY are registered tradema r k s of
Rosemount, Inc., Eden Prair i e, Minn eso ta . Fis her -Rosemount is a trademark o f
Fisher-Rosemount, C layton, Missouri. HART is a registered trademar k of the HART
Communication Foundation, Austin, Texas. Modbus is a registered tra dem ark of
Modicon, Inc., North Andover, Massachusetts. Tefzel is a registered trademark of E.I.
Du Pont de Nemours Co., Inc., Wilmington, Delaware.
Rack-Mount Transmitter
Instruction Manual
Version 3 Transmitters
For technical assistance, phone the Micro Motion Customer
Service Department:
• In the U.S.A., phone 1-800-522-6277, 24 hours
• Outside the U.S.A., phone 30 3-530-8400, 24 hours
Figure 5-6Frequency/pulse output wiring for increased
Figure 5-7Frequency/pulse output wiring for constan t
Figure 5-8Frequency/pulse output wiring for open
RFT9739 Rack-Mount Transmitter Instruct ion M anual
1Before You Begin
1.1About this manual
1.2About the transmitter
This instruction manual explains how to:
• Install the Micro Motion
use with Micro Motion Coriolis flow sensors, including instructions for:
-
Power-supply and sensor wiring
-
Output wiring
• Initialize the transmitter
• Diagnose and troubleshoot problems with the transmitter
For more information about the Micro Motion sensors, see the
appropriate sensor instruction manual.
Instructions in this manual pertain to Version 3 transmitters. Do not use
this manual for transmitters shipped before January 1996. To identify the
transmitter version, see
Micro Motion rack-mount transmitters have enhanced EMI immunity that
complies with EMC directive 89/336/EEC and low-voltage directive
73/23/EEC, when properly installed in accordance with the guidelines
and instructions in this manual.
The Model RFT9739 transmitter is a microprocessor-based transmitter
for fluid process measurement. The transmitter works with Micro Motion
sensors to measure mass or volume flow, density, and temperature.
The rack-mount RFT9739 is for control-room mounting. The housing is a
1/3 rack cassette for 19-inch enclosure-dense packaging. Components
of the transmitter are shown in
®
Model RFT9739 rack-mount transmitter for
Appendix E
, page 101.
Figure 1-1
, page 2.
Pow er-Supply and
Sensor Wiring
Output WiringStartupTroubleshootingBefore You BeginGetting StartedMounting
The RFT9739 front panel has a two-line, 16-character, alphanumeric
liquid crystal display (LCD). Scroll and Reset buttons enable the user to
perform the following operations. Use of the display is described in
Section 6.2
• View the flow rate, density, temperature, mass and volume totals and
inventory levels, and status messages
• Set the transmitter's flow totalizers
• Reset communication paramete rs
• Zero the flowmeter
RFT9739 Rack-Moun t Transmitter Instruction Manu al
, page 60.
1
continued
Before You Begin
Figure 1-1. RFT9739 exploded view
Module cassette
Top cover
Control board
Back pane l
Side panel
Front panel
Power board
Side panel
Bottom cover
2
RFT9739 Rack-Mount Transmitter Instruct ion M anual
2Getting Started
Hazardous area
approvals tag
2.1Hazardous area
installations
WARNING
If the sensor is installed in a hazar do us area, fail ure to
comply with requirements for intrinsic safety could
result in an explosion.
• Install the transmitter in a non-hazardous area.
• For intrinsically safe sensor inst allations, use this
document with Micro Motion UL or CSA installation
instructions.
• For hazardous area installations in Europe, refer to
standard EN 60079-14 if nation al standards do not apply.
• Read the approvals tag before installing the RFT9739. The approvals
tag is attached to the side of the transmitter. See
• For a complete list of UL, CSA, and European approvals, see page 88.
• For an intrinsically safe installation of the sensor, use this manual with
the appropriate Micro Motion intrinsically safe installation instructions:
-
UL-D-IS Installation Instructions
-
CSA-D-IS Installation Instructions
• In Europe, refer to standard EN60079-14 if national standards do not
apply. To comply with CENELEC standards, see page 4.
The RFT9739 rack-mount transmitter is classified as a Class A product.
When used in a residential area or in an adjacent area thereto, radio
interference may be caused by radios, television receivers, and like
devices.
Figure 2-1
.
Pow er-Supply and
Sensor Wiring
Output WiringStartupTroubleshootingBefore You BeginGetting StartedMounting
Figure 2-1.
Hazardous area approvals
tag
RFT9739 Rack-Moun t Transmitter Instruction Manu al
3
Getting Started
continued
Hazardous area
installations in Europe
2.2Configuration, calibration,
and characterization
To comply with CENELEC standards for hazardous area installations in
Europe, adhere to the following CENELEC conditions for safe use.
Location
The RFT9739 must be installed outside the hazardous area. The
transmitter installation must meet (at least) IP20 safety requirements,
per IEC 529.
Potential equalization
To achiev e potential equalization, the RFT9739 ground conductor should
be connected to the appropriate ground terminals within the hazardous
area, using a potential equalizing line.
Output wiring
Nonintrinsically-safe connections between the RFT9739 and other
devices may be made
or equal to 250 V.
The following information explains the differences among configuration,
calibration, and characterization. Certain parameters might require
configuration
even when
Configuration parameters
measurement units, flow direction, damping values, slug flow
parameters, and span values for the milliamp and frequency outputs. If
requested at time of order, the transmitter is configured at the factory
according to customer specifications.
only
to devices that maintain a voltage less than
calibration
include items such as transmitter tag,
is not necessary.
Calibration
density, and temperature. Field calibration is optional.
Characterization
density, and temperature directly into transmitter memory. Calibration
factors can be found on the sensor serial number tag and on the
certificate that is shipped with the sensor.
For configuration, calibration, or characterization procedures, see one of
the following communications manuals:
Using the HART Communicator with Micro Motion Transmitters
•
Using ProLink Software with Micro Motion Transmitters
•
Using Modbus Protocol with Micro Motion Transmitters
•
You can also use Fisher-Rosemount™ Asset Management Solutions
(AMS) software for configuration, calibration, and characterization. For
more information, see the AMS on-line help.
A basic software tree for the HART Communicator is shown in
Appendix D
accounts for an individual sensor’s sensitivity to flow,
is the process of entering calibration factors for flow,
, page 97.
4
RFT9739 Rack-Mount Transmitter Instruct ion M anual
Getting Started
Switches 1 through 10 at left
are shown in the OFF position.
continued
2.3Switch settings
Figure 2-2.
Switches
Switches 1 through 10, located inside the transmitter on the control
board, control the following transmitter functions (see
Figure 1-1
,
page 2, for the location of the control board):
• Communications settings, including baud rate, stop bits and parity,
data bits, communication protocol, and physical layer
• mA outputs
• Zeroing method
• Write-protection of transmitter configuration
Switches are shown in
Figure 2-2
, and described in the following
sections. To access switches, remove the bottom cover of the transmitter
housing. Normally, switch settings do not require adjustment.
Pow er-Supply and
Sensor Wiring
RFT9739 Rack-Moun t Transmitter Instruction Manu al
Output WiringStartupTroubleshootingBefore You BeginGetting StartedMounting
5
Getting Started
continued
Security modes
Table 2-1. Security modes
Switch settings
Switch 1
Switch 2
Switch 3
Mode
1
OFF
OFF
OFF
Switches 1, 2, and 3 are security switches, which enable the user to
disable flowmeter zeroing, disable resetting of totalizers, and writeprotect all configuration and calibration parameters.
Switch settings enable any of eight possible security modes. Different
modes determine which functions are disabled and whether
configuration and calibration parameters are write-protected. The
following functions can be disabled:
• Flowmeter zeroing using digital communications
• Flowmeter zeroing using the Scroll and Reset buttons
• Totalizer control, with flow, using digital communications
• Totalizer control, with flow, using the Scroll and Reset buttons
• Totalizer control, with zero flow, using digital communications
• Totalizer control, with zero flow, using the Scroll and Reset buttons
Table 2-1
lists the parameters that are write-protected and functions that
are disabled for each security mode. Security modes 1 through 7 are
entered immediately when switches are set.
For information about security mode 8, see pages 7 through 8.
Mode
2
OFF
OFF
ON
Mode
3
OFF
ON
OFF
Mode
4
OFF
ON
ON
Mode
5
ON
OFF
OFF
Mode
6
ON
OFF
ON
Mode
7
ON
ON
OFF
Mode
8*
ON
ON
ON
Function/
parameter
Flowmeter
zeroing
Totalize r
control,
no flow
Totalize r
control,
with flow
Configuration and
calibration parameters
* C hanging the settings of switches 1, 2, and 3 does not immediately impl em ent security mode 8. For more information about
RFT9739 Rack-Mount Transmitter Instruct ion M anual
Getting Started
continued
Security mode 8
When transmitter security is set for mode 8, the transmitter meets
security requirements for custody transfer described in National Institute
of Standards and Technology (NIST) Handbook 44.
Once the transmitter is configured for security mode 8, the security
mode cannot be changed unless a master reset is performed. A master
reset causes all configuration parameters to return to their default
values, and
requires complete characterization and reconfiguration
of the trans m i tt e r.
If the user attempts to enter a new security mode or change the
transmitter configuration after entering security mode 8:
• Internal totalizers stop counting
• The frequency/pulse output goes to 0 Hz
• mA outputs go to 4 mA
• The display reads "SECURITY BREACH; SENSOR OK"
• Custody transfer event registers record each change made to defined
configuration and calibration parameters. (For a list of these
parameters, see
Table 6-2
, page 64.)
The security breach continues, and totalizers and outputs remain
inactive, until the transmitter is reconfigured for security mode 8, or until
a master reset has been performed. Custody transfer ev ent registers are
not affected by a master reset.
• For information about event registers, see
• To perform a master reset, see
Section 7.7
Section 6.3
, page 79.
, page 64.
Pow er-Supply and
Sensor Wiring
Milliamp output trim, milliamp output test, and frequency/pulse output
test procedures cannot be performed after security mode 8 is entered.
Before entering security mode 8,
perform milliamp trim and/or test
procedures, if necessary , as described in any of the following manuals or
in AMS on-line help:
Using the HART Communicator with Micro Motion Transmitters
•
Using ProLink Software with Micro Motion Transmitters
•
Using Modbus Protocol with Micro Motion Transmitters
•
To enter security mode 8:
1. Note the position of switch 5.
2. Set switches 1, 2, 3, and 10 to the ON position.
3. Set switches 4, 5, and 6 to the OFF position.
4. Locate the Reset button on the transmitter front panel.
5. Press and hold the Reset button for ten seconds.
6. Reset switch 5 to the desired position (as noted in Step 1).
7. Reset switch 10 to the OFF (OPERATE) position.
8. To verify the transmitter is in security mode 8, use the Scroll button to
scroll through the display screens. The transmitter is in security
mode 8 if the CONFIG REG and CALIBRATE REG screens appear.
9. Leave switches 1, 2 and 3 in the ON position to maintain security
mode 8.
Output WiringStartupTroubleshootingBefore You BeginGetting StartedMounting
RFT9739 Rack-Moun t Transmitter Instruction Manu al
7
Getting Started
continued
To verify the transmitter is in security mode 8:
Use the Scroll button to scroll through process variable screens to event
register screens. If event register screens appear, the transmitter is in
security mode8. For more information about us ing the Scr oll b u tt on an d
transmitter display, see
Section 6.2
, page 60.
To make changes to configuration or calibration parameters once
security mode 8 is entered:
1. Set switches 1, 2, and 3 to the OFF position.
2. Make changes through digital communication or with the Scroll and
Reset buttons (see "Communication configuration mode", page 61).
Custody transfer event registers record changes made to defined
configuration and calibration parameters. For more information about
digital communications, see the following instruction manuals or use
AMS on-line help:
Using the HART Communicator with Micro Motion Transmitters
•
Using ProLink Software with Micro Motion Transmitters
•
Using Modbus Protocol with Micro Motion Transmitters
•
3. Set switches 1, 2, and 3 to the ON position.
To reenter security mode 8:
If security mode 8 has been established previously, and the security
mode has been temporarily changed, it is not necessary to use the
Reset button to reenter security mode 8. In such a case, resetting
switches 1, 2, and 3 to the ON position will reenter security mode 8
immediately.
If a master reset has been performed, it is necessary to use the Reset
button method to reenter security mode 8. See the procedure, above.
To change to a security mode other than mode 8:
1. Perform a master reset (see
Section 7.7
, page 79, for master reset
procedure).
2. Perform characterization and re-configuration procedures as
described in any of the following instruction manuals or AMS on-line
help:
Using the HART Communicator with Micro Motion Transmitters
•
Using ProLink Software with Micro Motion Transmitters
•
Using Modbus Protocol with Micro Motion Transmitters
•
3. Set switches 1, 2, and 3 to the desired positions. See
Table 2-1
,
page 6.
8
RFT9739 Rack-Mount Transmitter Instruct ion M anual
Getting Started
continued
Communication settings
Switch 5 enables the user to choose the standard communication
configuration or user-defined parameters. With switch 10 in the ON
(CONFIG) position, switches 1 through 6 can be used for setting userdefined communication parameters.
Standard communication setting
To use the standard communication configuration, set switch 5 to the
STD COMM position. Setting the switch in this position establishes the
following parameters:
• HART protocol on the Bell 202 standard, at 1200 baud, on the primary
mA output
• Modbus protocol in RTU mode, at 9600 baud, on the RS-485 output
• 1 stop bit, odd parity
For RFT9739 software versions 3.6 and later, if switch 5 is in the STD
COMM position, an error message will appear on the RFT9739 display
when an attempt is made to change the communication configuration
using the RFT9739 display controls.
User-defined communication settings
To establish user-defined settings, set switch 5 to the USER-DEFINED
position, then use the buttons on the front panel to set baud rate; stop
bits and parity; data bits, protocol, and physical layer.
• When the transmitter is shipped from the factory, the default settings
are HART protocol, over RS-485, at 1200 baud, with 1 stop bit and odd
parity .
• For more information on using the display, see
Section 6.2
, page 60.
Pow er-Supply and
Sensor Wiring
Milliamp output scaling
Switches 7, 8, and 9 allow the user to choose 0-20 mA or 4-20 mA
scaling for mA outputs, and upscale or downscale fault outputs.
Switch 7 defines the primary mA output scaling. Switch 8 defines the
secondary mA output scaling. Either switch may be set in the 0-20
position or the 4-20 position.
• The mA outputs are NAMUR compliant when switches 7 and 8 are in
the 4-20 position. See
Section 5.3
, page 27.
• Communication using the HART protocol over the primary mA output
requires switch 7 to be set in the 4-20 position.
• If switch 7 is in the 0-20 mA position, communication may be lost if
output is less than 2 mA. T o re-establish communication, move s witch 7
to the 4-20mA position.
Switch 9 defines the RFT9739 fault outputs. Fault outputs can be set for
downscale or upscale levels.
• If switch 9 is set to the DWNSCALE position, mA outputs go to 0 mA if
they produce a 0-20 mA current, or to 0-2 mA if they produce a
4-20 mA current; the frequency/pulse output goes to 0 Hz.
• If switch 9 is set to the UPSCALE position, mA outputs go to 22-24 mA;
the frequency/pulse output goes to 15-19 kHz.
• For more information, see "Fault outputs", page 69.
Output WiringStartupTroubleshootingBefore You BeginGetting StartedMounting
RFT9739 Rack-Moun t Transmitter Instruction Manu al
9
10
RFT9739 Rack-Mount Transmitter Instruct ion M anual
3 Transmitter Mounting
3.1 General guidelines
Follow these guidelines when installing the rack-mount RFT9739
transmitter:
•Locate the transmitter where it is accessible for service and calibration.
•Install the transmitter in a location that is compliant with the area
specified on the RFT9739 approvals tag (see
•To comply with CENELEC standards for hazardous area installations in
Europe, the RFT9739 must be installed outside the hazardous area.
The transmitter installation must meet (at least) IP20 safety
requirements, per IEC 529.
•Total length of cable from the sensor to the transmitter must not exceed
1000 feet (300 meters).
•Locate the transmitter where the ambient temperature remains
between 32 and 122°F (0 and 50°C).
The rack-mount RFT9739 meets DIN standard 41494, 19-inch
configuration for control-room equipment.
•Transmitter dimensions are shown in
•Three transmitters fit into one 19-inch enclosure with a Eurocard
220mm depth, as indicated in
•When installing multiple transmitters in a single rack, 15 watts of
forced-air cooling, per transmitter, is required. Minimum spacing is
shown in
Figure3-3
, page14.
Figure3-1
Figure3-2
Figure2-1
, page12.
, page13.
, page3).
CAUTION
Failure to maintain an ambient temperature below
maximum temperature rating could result in
operational failure and product damage.
Pow er-Supply and
Sensor Wiring
Output WiringStartupTroubleshootingBefore You BeginGetting StartedMounting
Install transmitter in an area with sufficient air flow to keep
the ambient temperature below 122°F (50°C).
The back panel of the transmitter housing has two 32-pin connectors for
sensor wiring and output wiring. These connectors meet DIN standard
41612, Model F (male). For more information, see
RFT9739 Rack-Moun t Transmitter Instruction Manu al
Section3.2
, page15.
11
continued
Transmitter Mounting
Figure 3-1. RFT9739 dimensions
Dimensions in
5 37/64
(141.7)
(127)
inches
(mm)
5 17/32
(140.4)
5
28TE
25TE
4X M2.5 x 11
Back panel with
DIN 41612 male
Y-shaped screw terminals
2 19/32
(66)
13TE
With Y-shaped
screw terminals
10 5/16
(281.9)
9 15/64
(234.6)
8 23/64
(212.3)
Back panel with
DIN 41612 male
fast-on/solder terminals
2 19/32
(66)
13TE
With fast-on/solder
terminals
10 1/16
(255.6)
12
4 13/16
(122.4)
5 3/64
(128.4)
3HE
4 3/8
(111.1)
3/16
(4.7)
47/64
(18.7)
RFT9739 Rack-Mount Transmitter Instruct ion M anual
continued
Transmitter Mounting
Figure 3-2. Rack-mount connector locations
Dimensions in
1 TE ≈ 5.08 mm
inches
(mm)
8 13/32
(213.5)
0TE
6TE – CN1
19
(483)
19TE – CN2
34TE – CN1
47TE – CN2
62TE – CN1
5 3/64
(128.4)
3HE
75TE – CN2
84TE
Pow er-Supply and
Sensor Wiring
5 37/64
(141.7)
28TE
Output WiringStartupTroubleshootingBefore You BeginGetting StartedMounting
RFT9739 Rack-Moun t Transmitter Instruction Manu al
13
continued
Transmitter Mounting
Figure 3-3. Space requirements for proper ventilation
Dimensions in
inches
(mm)
5 3/64
(128.4)
3HE
5 3/64
(128.4)
3HE
1 22/32
(42.8)
1HE
1 22/32
(42.8)
1HE
When installing multiple transm i t te rs in a sin gl e rack, 15 watts of forced-air co ol i ng, per transm i t te r, is
required. Maintain sufficient air flow to keep the ambient temperature be l ow 122 °F ( 50° C ).
5 3/64
(128.4)
3HE
14
RFT9739 Rack-Mount Transmitter Instruct ion M anual
Transmitter Mounting
continued
3.2Connectors
The back panel of the transmitter housing has two 32-pin connectors,
labeled CN1 and CN2, and a 2-pin connector, labeled CN3. Mating
terminal strips, shipped with the transmitter, plug into the connectors.
The detachable terminal strips enable wiring to remain connected when
the transmitter is removed from the rack.
• AC power-supply wiring connects to CN3
• DC power-supply wiring connects to CN2
• Sensor wiring connects to CN1
• Output wiring connects to CN2
Connectors CN1 and CN2 are available in two types, illustrated in
Figure 3-4
, page 15.
• The standard rectangular configuration accommodates fast-on (wire-
pin) or soldered connections.
• The optional Y-shaped connectors have screw terminals, which
accommodate wires as large as 14 AWG (2.5 mm²).
• For fast-on/solder connectors, on connector CN1, pin row D is not
used; on connector CN2, pin row B is not used.
Connectors CN1 and CN2 meet DIN standard 41612, Model F (male).
• The positions of connectors CN1 and CN2 in a 19" rack are indicated in
Figure 3-2
•See
, page 13.
Chapter 4
, page 17, for power-supply and sensor wiring
instructions.
Chapter 5
•See
, page 25, for output wiring instructions.
Pow er-Supply and
Sensor Wiring
Figure 3-4. Types of connectors
Fast-on/solder
connecter
CN1 or CN2
FrontSide
Y-Type
connector
CN2CN1
Top
Front
Output WiringStartupTroubleshootingBefore You BeginGetting StartedMounting
RFT9739 Rack-Moun t Transmitter Instruction Manu al
15
16
RFT9739 Rack-Mount Transmitter Instruct ion M anual
4Power-Supply and Sensor
Wiring
4.1General guidelines
WARNING
Failure to comply with requirements for
intrinsic safety if the sensor is installed in a hazardou s
area could result in an explosion.
Sensor wiring is intrinsically safe.
• Install the transmitter in a non-hazardous area.
• For intrinsically safe sensor inst allations, use this
document with Micro Motion UL or CSA installation
instructions.
• For hazardous area installations in Europe, refer to
standard EN 60079-14 if nation al standards do not apply.
• Terminal blocks may be unplugged from the transmitter back panel for
easier installation of wiring.
• Install cable and wiring to meet local code requirements.
• A switch may be installed in the power-supply line. For compliance with
low-voltage directive 73/23/EEC, a switch in close proximity to the
transmitter is required for AC-powered transmitters.
• Do not install AC power cable or unfiltered DC power cable in the same
conduit or cable tray as sensor cable or output wires.
Pow er-Supply and
Sensor Wiring
4.2Power supply and
grounding
Incorrect vol tage, or install ation with po wer s upply on,
will cause transmitter damage or failure.
• Match power-supply voltage with voltage indicated on
transmitter back panel. See
• Turn off power before installing transmitter.
Power-supply options
RFT9739 Rack-Moun t Transmitter Instruction Manu al
• The transmitter is configured at the factory for a 110/115 or
220/230 VAC pow er supply. A label in the upper corner on the
transmitter's back panel indicates the configured power-supply voltage.
See
• Any RFT9739 rack-mount transmitter can accept a DC power supply,
whether or not the back panel indicates the transmitter has been
configured for AC power.
• To change power-supply voltage from the configured voltage, see
Section 4.3
Figure 4-1
, page 21.
CAUTION
, page 18.
Figure 4-1
Output WiringStartupTroubleshootingBefore You BeginGetting StartedMounting
, page 18.
17
Power-Supply and Sensor Wiring
continued
Power-supply wiring
Some European applications require installation of AC power-supply
wiring to connector CN2, terminals D2 (AC+), D6 (AC–), and Z2 (GND).
In Europe, before making AC power-supply wiring connections at
CN2,
Europe, phone +31 (0) 318 549 443.
To install power-supply wiring, refer to
steps:
1. Match power-supply voltage to voltage indicated on the label in the
upper corner of the transmitter back panel.
2. Connect AC power-supply wiring at connector CN3 and the ground
lug directly above connector CN3; or connect DC power-supply wiring
at connector CN2, to terminals Z32 (DC+) and D32 (DC–).
3. Ground the transmitter as instructed below.
Figure 4-1. Power-supply wiring terminals
Power-supply
voltage label
AC power
ground
contact the Micro Motion Customer Service Department. In
Figure 4-1
and follow these
RFT9739
back panel
AC power -supply
DC power-supply
terminals
terminals
18
RFT9739 Rack-Mount Transmitter Instruct ion M anual
Power-Supply and Sensor Wiring
continued
Grounding
Table 4-1.
Selecting the proper
grounding scheme
CAUTION
Failure to comply with requirements for intrinsic
safety if the sensor is installed in a hazardous area
could result in an explosion.
The transmitter must be properly grounded. Follow the
instructions below to gr ound the transmitter.
To ensure proper grounding:
• If the sensor installation must comply with UL or CSA standards, refer
to the instructions in one of the following Micro Motion documents:
-
UL-D-IS Installation Instructions
-
CSA-D-IS Installation Instructions
• To determine which grounding instructions to use, refer to
ConditionFigurePage
Sensor is installed in a non-hazardous area4-2a19
Sensor is installed in hazardous area,
plant does
installations in Europe onl y
Sensor is installed in a hazardous area,
any area except Europe
Plant uses a separate, high-integri t y, I.S. ground scheme4-2c20
have a separate intrinsically safe ground system ,
not
Table 4-1
4-2a19
4-2b20
.
Pow er-Supply and
Sensor Wiring
Figure 4-2a. Grounding detail — typical
Earth
ground
Ground wire
Output WiringStartupTroubleshootingBefore You BeginGetting StartedMounting
If national standards are no t in effect, adhe re
to these guidelines for grounding:
• Use copper wire, 14 AWG (2.5 mm²) or
larger wire size.
• Keep all ground leads as short as pos si ble,
less than 1 ohm impedan ce.
• A factory-installed ground wire, connecting
the I.S. ground and power-supply ground
terminals , must remain in place.
• Connect power-supply ground direc tly to
earth.
• For hazardous area installation in Europ e,
use standard EN 60079 -1 4 as a guideline.
• To achieve potential equalization and comply
with CENELEC standards for hazardous
area installations in Eur ope, co nnect powerground terminal to the appropriate ground
terminals within the hazardous area, using a
potential equalizing line.
RFT9739 Rack-Moun t Transmitter Instruction Manu al
If national standards are no t in effect, adhe re
to these guidelines for grounding:
• Use copper wire, 14 AWG (2.5 mm²) or
larger wire size.
• Keep all ground leads as short as pos si ble,
less than 1 ohm impedan ce.
• A factory-installed ground wire, connecting
the I.S. ground and power-supply ground
terminals, must be removed.
• Connect ground lead from power-supply
ground terminal directly to earth ground.
• To achieve potential equalization, connect
the I.S. ground terminal to the ap propriate
ground terminals w i thi n th e hazardous area,
using a potential equalizing line.
• I.S. ground wire must not be routed with
other wires.
20
RFT9739 Rack-Mount Transmitter Instruct ion M anual
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