Micro Motion Installation Instructions: RFT9739 Installation Instruction | Micro Motion Manuals & Guides

Quick Reference Guide

P/N 20000794, Rev. D
February 2003

Model RFT9739
Transmitter
Installation Instructions

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Micro Motion

TM

BEFORE YOU BEGIN

About these instructions

This quick reference guide explains basic installation guidelines for
Micro Motion

®

RFT9739 transmitters.

For more information on I.S. applications, refer to Micro Motion UL,
CSA, SAA, or ATEX installation instructions.

For complete transmitter instructions about configuration,
maintenance, and service, refer to the instruction manual shipped with
the transmitter.

European installations

Micro Motion products comply with all applicable European
directives when properly installed in accordance with the instructions
in this quick reference guide. Refer to the EC declaration of
conformity for directives that apply to a specific product.

The EC declaration of conformity, with all applicable European
directives, and the complete ATEX Installation Drawings and
Instructions are available on the internet at
www.micromotion.com/atex or through your local Micro Motion
support center.

WARNING

Improper installation in a hazardous area can cause
an explosion.

For information about hazardous applications, refer to the
Micro Motion UL, CSA, SAA, or ATEX installation
instructions, shipped with the transmitter or available from
the Micro Motion website.

©2003, Micro Motion, Inc. All rights reserved. Micro Motion is a registered trademark of Micro Motion, Inc. The
Micro Motion and Emerson logos are trademarks of Emerson Electric Co. All other trademarks are property of their
respective owner s.

1

Hazardous voltage can cause severe injury or death.

Install transmitter and complete all wiring before
supplying power.

Improper installation could cause measurement error
or flowmeter failure.

Follow all instructions to ensure transmitter will operate
correctly.

Installation options

WARNING

WARNING

RFT9739 rack-mount and field-mount transmitters may be connected
to Micro Motion

®

Model D, DL, DT, ELITE, and F-Series sensors

with a Micro Motion 9-wire cable.

STEP 1. Determining a location

Choose a location for the transmitter based on the requirements
described on page 2.

Environmental requirements

For rack-mount and field-mount transmitters with local displays,
install the transmitter where ambient temperature is between +32 and
+122°F (0 and +50°C). For field-mount transmitters without local
displays, install the transmitter where ambient temperature remains
between –22 and +131°F (–30 and +55°C).

2

Power source

The transmitter must be connected to an AC or DC voltage source.

• Rack-mount transmitter

The AC transmitter accepts an 110/115 or 220/230 VAC power
supply. The DC transmitter accepts a 12-30 VDC power supply.

• Field-mount transmitter

The AC transmitter accepts a 85 to 250 VAC power supply. The
DC transmitter accepts a 12-30 VDC power supply.

Flowmeter cable lengths

The maximum cable length between the sensor and the transmitter is
1000 feet (300 meters).

STEP 2. Mounting the transmitter

Rack-mount transmitter

The rack-mount RFT9739 meets DIN standard 41494, 19-inch
configuration for control-room equipment. The 19" cassette fits in a
19" rack with a Eurocard 220mm depth. Transmitter dimensions are
shown in Figure 1.

When installing multiple transmitters in a single rack, 15 watts of
forced-air cooling, per transmitter, is required. Refer to the manual
that was shipped with the transmitter for details on spacing
requirements.

CAUTION

Failure to maintain an ambient temperature below
maximum temperature rating could result in
operational failure and product damage.

Install transmitter in an area with sufficient air flow to keep
the ambient temperature below +122

3

o

F (+500C).

Connectors CN1 and CN2 are available in two types.

• The standard rectangular configuration accommodates fast-on
(wire-pin) or soldered connections.

• The optional Y-shaped connectors have screw terminals, which

2

accommodate wires as large as 14 AWG (2,5 mm

).

Figure 1. Rack-mount RFT9739 dimensions

Inches

(mm)

5 17/32
(140.4)

Back panel with DIN 41612 male

Y-shaped screw terminals

2 19/32

(66)

13TE

Back panel with DIN
41612 male fast­on/solder terminals

2 19/32

(66)

13TE

5 37/64
(141.7)

5

(127)

28TE

25TE

4x M2.5x11

4 13/16
(122.4)

47/64 (18.7)

5 3/64

(128.4)

3HE

With Y-shaped screw

3/16 (4.7)

9 15/64
(234.6)

terminals

10 5/16
(281.9)

8 23/64
(212.3)

4

With fast-on/solder
terminals

10 1/16
(255.6)

4 3/8

(111.1)

Field-mount transmitter

To install a field-mount transmitter, follow the guidelines below.

• Install conduit that allows a complete seal with the conduit
openings.

• If possible, orient the transmitter with its conduit openings pointed
downward. If this is not possible, seal the conduit to prevent
condensation and other moisture from entering the housing.

• If the transmitter has a display, the display will be right-side-up
only if the transmitter is oriented with its conduit openings pointed
downward.

To wall mount the field-mount transmitter, refer to Figure 2 and the
following guidelines:

• Use four 5/16-inch diameter (M8) bolts (not included).

• Do not secure bolts to separate girders, beams, wall studs, etc.,
which can move independently.

To pole mount the field-mount model, refer to Figure 2 and the
following guidelines:

• Pole must extend at least 1 foot (300 mm) from an immobile base,
and be no more than 2 inches (50 mm) in diameter.

• Use two 5/16-inch (M8) U-bolts for 2-inch pipe, and four 5/16­inch (M8) nuts (not included), suitable for the environment.

5

Figure 2. Field-mount RFT9739 dimensions

Inches

(mm)

Minimum clearance for
removal of cover:

without display

11 1/2 (292)

with display

13 3/16 (355)

4X Ø

Optional

display

9 1/8
(232)

23/64

(9)

7 19/64

(185)

3/16

(5)

2 13/16

(71)

7 15/64

(184)

2 3/8

(60)

2 3/8

(60)

4 33/64

(115)

8 3/8
(213)

9 11/64

(233)

Optional
display

3/4"-14 NPT

3X

conduit opening

1 17/32

(39)

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STEP 3. Wiring the transmitter to the sensor

WARNING

Failure to comply with requirements for intrinsic
safety in a hazardous area could result in an
explosion.

Sensor wiring is intrinsically safe.

• Keep intrinsically safe sensor wiring separated from
power supply wiring and output wiring.

• For intrinsically safe sensor installations, use this
document with Micro Motion UL, CSA, SAA, or ATEX
installation instructions.

• For hazardous area installations in Europe, refer to
standard EN 60079-14 if national standards do not
apply.

• For field-mount transmitters, make sure the safety
barrier partition is in place before operating the
transmitter. See Figure 5.

CAUTION

Improper installation of cable or conduit could cause
measurement error or flowmeter failure.

Keep cable away from devices such as transformers,
motors, and power lines, which produce large magnetic
fields.

• Terminal blocks may be unplugged 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 is required.

• Do not install power cable in the same conduit or cable tray as
flowmeter cable or output wires.

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