Micro Motion Model 3700 Transmitter 9-Wire or Model 3350 Peripheral for Field-Mount Installation Instructions

Quick Reference Guide

P/N 3300996, Rev. C
April 2003

Model 3700 Transmitter
(9-Wire) or
Model 3350 Peripheral

Installation Instructions for
Field-Mount

For online technical support, use the EXPERT2™ system
at www.expert2.com. To speak to a customer service

representative, call the support center nearest you:

• In the U.S.A., phone [phone]-MASS
(1-800-522-6277)

• In Canada and Latin America, phone
[phone]

• In Asia, phone [phone]

• In the U.K., phone 0800 - 966 180 (toll-free)

• Outside the U.K., phone [phone]

Micro Motion

TM

BEFORE YOU BEGIN

This quick reference guide explains basic installation guidelines for

®

mounting the Micro Motion

Model 3350/3700 applications platform on

an instrument pole or flat surface.

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

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

WARNING

Improper installation in a hazardous area can cause
an explosion.

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

WARNING

Hazardous voltage can cause severe injury or death.

Install transmitter and complete all wiring before
supplying power.

CAUTION

Improper installation could cause measurement error
or flowmeter failure.

Follow all instructions to ensure transmitter will operate
correctly.

©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
owners.

1

European installations

This Micro Motion product complies 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 this 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.

Installation kit

The Model 3350/3700 installation kit includes the parts shown in
Figure 1.

Figure 1. Field-mount installation kit

Mounting bracket

4 x Lock washer

Transmitter can be oriented
on bracket. See Step 3, page 5.

4 x Flat washer

4 x M8x16 Bolt assemblies

2

STEP 1. Choosing a location

Choose a location for the transmitter based on the requirements described
below.

WARNING

Improper installation in a hazardous area could cause
an explosion.

Install the transmitter in an area that is compatible with
the rating on the approvals tag. See Figure 3, page 4.

Environmental requirements

Install the Model 3350/3700 according to specified limits:

• Ambient temperature: –4 to +140 °F (–20 to +60 °C)

• Humidity: SAMA PMC 31.3, Section 5.2, Environmental NEMA 4X
(IP 65)

• Vibration: Per IEC 68-2-6 at 1,0 g, 15 to 2000 Hz, 50 sweep cycles

Dimensions

See Figures 2 and 3, page 4, for Model 3350/3700 dimensions.

Visibility of tags

To ensure personal and system safety, all tags attached to the housing
must remain visible. Clean them as often as necessary. Replace tags that
are damaged, missing, or worn. See Figure 3, page 4, for location of
approvals tag.

Flowmeter cable lengths

Maximum cable length from the sensor to the Model 3700 transmitter is
1000 feet (300 meters).

If you are installing the Model 3350 applications peripheral in
combination with a transmitter, the maximum cable length from the
transmitter’s frequency output to the Model 3300’s frequency input is
500 feet (150 meters).

3

Figure 2. Dimensions – face view

inches

(mm)

4 x 5/16-inch

(9 mm)

diameter

2 13/16

(71)

Mounting bracket can
be rotated as needed

11

(279)

12

(305)

4

(102)

9 3/16

(234)

Display cover can be

rotated as needed

Figure 3. Dimensions – top view

inches

(mm)

6 1/8
(158)

8 11/16

(221)

3 5/8

(92)

6

(152)

5 1/16-inch (129 mm)

clearance for removal of

circuit boards

Approvals tag

15 1/2

(394)

11 5/16

(288)

4

STEP 2. Preparing conduit openings for ATEX Zone 1

If the Model 3350/3700 carries an ATEX Zone 1 approval:

1. Remove thread protectors from conduit openings (see Figure 4).

2. Install factory-supplied cable glands or user-supplied EExe cable
entry devices in conduit openings that are in use.

3. Install EExe plugs in conduit openings that are not in use.

STEP 3. Orienting the Model 3350/3700 (optional)

The Model 3350/3700 can be oriented on the mounting bracket as
needed, and the display cover can be rotated on the applications platform.
Figure 4 provides orientation examples.

To orient the Model 3350/3700:

1. Use the four supplied mounting bolt assemblies.

2. Using a 13 mm hex wrench, install the bolt assemblies to 12 ft-lb
(16 Nm) of torque.

To rotate the display cover, if needed, see the transmitter installation
manual.

Figure 4. Orientation examples

Conduit openings for

intrinsically safe

sensor wiring

Conduit openings for

non-intrinsically safe

input/output wiring

Display cover

5

STEP 4. Mounting the applications platform

For flat-surface mounting, see Figure 5.

For pole mounting, see Figure 6.

Figure 5. Mounting to a flat surface

• Mount all four bolts to the same surface.

• If mounting surface is not flat, use
washers to shim the bracket.

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

Figure 6. Mounting to a pole

4 x 5/16-inch or M8 bolt
(user-supplied)

4 x 5/16 inch nut

(user-supplied)

2 x 5/16-inch U bolt for
2-inch pipe (user-supplied)

6

STEP 5. Connecting input and output wiring

Figure 7 shows the location of the wiring terminals on the Model
3350/3700.

Figure 7. Wiring terminals

(not supplied with all units)

wiring terminals (see

Lockout device

Intrinsically safe

sensor wiring terminals

(blue terminal block)

Wiring compartment

Should remain closed

while power is on

Label for sensor

Figure 8, page 8)

Display cover

1. Use 22 to 16 AWG (0,35 to 1,5 mm

2

) twisted-pair shielded wire.

Circuit board
compartment

Non-intrinsically safe
input/output wiring
terminals
(gray terminal block)

Power supply
ground

Label for input/output
wiring terminals

2. Using a flat-head screwdriver, loosen the four captive screws that
secure the display cover to the housing.

3. Connect input/output wiring to the gray terminal strip. Refer to
Table 1, page 8, and to the label attached to the back of the display
cover (shown in Figure 8, page 8).

• Ground the cable shields at a single point only.

• If more than two wires must be connected to a single terminal, use

a butt splice or spade lug to connect the wires.

7

Table 1. Input/output wiring terminals

Terminal number Designation

1 – 2 + Primary 4–20 mA output

3 – 4 + Secondary 4–20 mA output

5 – 6 + Frequency input

5 – 7 + Discrete input 1

5 – 8 + Discrete input 2

11 (B line) 12 (A line) RS-485 output

20 – 16 + Discrete output 3

20 – 17 + Discrete output 2

20 – 18 + Discrete output 1

20 – 19 + Frequency output

Figure 8. Wiring terminal labels

Model 3350/3700 with AC

power supply

Model 3350/3700 with DC

power supply

Terminal 9:

line

(L or L2)

Terminal 10:

neutral

(N or L1)

Terminal 9:

positive

Terminal 10:

negative

8

STEP 6. Connecting the Model 3700 to the sensor

If you are installing the Model 3350 applications peripheral, this step is
not required. To connect the Model 3700 transmitter to a Micro Motion
sensor, follow the steps below.

1. Identify the components shown in Figure 9.

Figure 9. Sensor cable to Model 3700

9-wire cable from sensor Model 3700

black (drain wires
from all wire sets)

brown
red

green
white

blue
gray

orange
yellow
violet

Sensor wiring terminals

(blue terminal block)

red

brown

yellow

black (drains)

violet

orange

green

white

blue

gray

2. Prepare the cable according to the instructions in Micro Motion’s
9-Wire Flowmeter Cable Preparation and Installation Guide.

3. Ensure that the cable has 360° shielding, continuous from the
transmitter to the sensor’s junction box. Two methods can be used:

• Metallic conduit

• Shielded or armored cable

Refer to Micro Motion’s 9-Wire Flowmeter Cable Preparation and
Installation Guide for specific instructions.

4. At the sensor:

a. Clip the cable drain wires.

b. Connect wiring inside the junction box housing and tighten the

screws to hold the wires in place.

9

For information on your sensor’s junction box terminals, see the
sensor installation manual or Micro Motion’s 9-Wire Flowmeter
Cable Preparation and Installation Guide.

5. At the transmitter:

a. Connect the color-coded wires to the appropriate terminals. To

identify the terminals, refer to Figure 9, page 9. No bare wires
should remain exposed.

b. If using shielded or armored cable, terminate the cable braid in the

cable gland, as described in Micro Motion’s 9-Wire Flowmeter
Cable Preparation and Installation Guide.

STEP 7. Connecting power supply wiring

CAUTION

Improper wiring installation can cause device failure
or measurement error.

• To avoid device failure or measurement error, do not
install power supply wiring in the same cable tray or
conduit as input/output wiring.

• Shut off power supply before installing the applications
platform.

• Make sure power supply voltage matches voltage that
is indicated on power supply wiring terminals. See
Figure 8, page 8.

Connect the Model 3350/3700 to a power supply as follows:

2

1. Use 18 to 12 AWG (0,75 to 4,0 mm

) wire.

2. Ground the power supply wiring:

• Connect the ground wire to the green screw. See Figure 7, page 7.

• Connect the other end of the ground wire directly to earth ground.

• Keep all ground leads as short as possible.

• Ground wiring must have less than 1 ohm impedance.

10

3. Connect wires to terminals 9 and 10 on the gray terminal strip. See
Figure 8, page 8.

A user-supplied switch may be installed in the power supply line. For
compliance with low-voltage directive 73/23/EEC (European
installations), a switch in close proximity to the Model 3350/3700 is
required.

4. Close the display cover and tighten the screws.

11

©2003, Micro Motion, Inc. All rights reserved. P/N 3300996, Rev. C

*3300996*

Visit us on the Internet at www.micromotion.com

Micro Motion Inc. USA

Worldwide Headquarters

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[phone]

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Micro Motion United Kingdom

Emerson Process Management Limited
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Bredbury Industrial Estate
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Micro Motion

TM

Micro Motion Asia

Emerson Process Management
1 Pandan Crescent
Singapore 128461
Republic of Singapore
T (65) 6777-8211
F (65) 6770-8003

Micro Motion Japan

Emerson Process Management
Shinagawa NF Bldg. 5F
1-2-5, Higashi Shinagawa
Shinagawa-ku
Tokyo 140-0002 Japan
T (81) 3 5769-6803
F (81) 3 5769-6843