Micro Motion 3700 Fieldmount Installation Instruction Installation Instructions

Installation Manual

20001008, Rev BC

March 2021

Micro Motion® Model 3700 Transmitter
(MVD) or Model 3350 Peripheral

Installation manual for field mount

Safety and approval information

This Micro Motion product complies with all applicable European directives when properly installed in accordance with the
instructions in this manual. 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, in addition to the

IECEx Installation Instructions for installations outside of the European Union and the CSA Installation Instructions for installations in
North America a

Information affixed to equipment that complies with the Pressure Equipment Directive can be found on the internet at

www.micromotion.com/documentation.

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

Other information

Full product specifications can be found in the product data sheet. Troubleshooting information can be found in the transmitter
configuration manual. Product data sheets and manuals are available from the Micro Motion web site at www.micromotion.com/

documentation.

Return policy

Micro Motion procedures must be followed when returning equipment. These procedures ensure legal compliance with government
transportation agencies and help provide a safe working environment for Micro Motion employees. Failure to follow Micro Motion
procedures will result in your equipment being refused delivery.

Information on return procedures and forms are available on our web support system at www.micromotion.com, or by phoning the
Micro Motion Customer Service department.

Emerson Flow customer service

Email:

• Worldwide: [e-mail]

• Asia-Pacific: [e-mail]

re available on the internet at www.micromotion.com or through your local Micro Motion support center.

Telephone:

North and South America Europe and Middle East Asia Pacific

United States 800-522-6277 U.K. 0870 240 1978 Australia 800 158 727

Canada [phone] The Netherlands [phone] New Zealand 099 128 804

Mexico [phone] France 0800917901 India 800 440 1468

Argentina [phone] Germany 0800 182 5347 Pakistan 888 550 2682

Brazil [phone] Italy 8008 77334 China [phone]

Venezuela [phone] Central & Eastern [phone] Japan [phone]

Russia/CIS [phone] South Korea [phone]

Egypt 0800 000 0015 Singapore [phone]

Oman 800 70101 Thailand 001 800 441 6426

Qatar 431 0044 Malaysia 800 814 008

Kuwait 663 299 01

South Africa 800 991 390

Saudia Arabia 800 844 9564

UAE 800 0444 0684

Contents

Contents

Chapter 1 Planning....................................................................................................................... 5

1.1 Installation kit ........................................................................................................................ 5

1.2 Choose a location................................................................................................................... 6

1.3 Cable lengths ......................................................................................................................... 8

1.4 Prepare conduit openings for ATEX Zone 1 or IECEx Zone 1...................................................... 9

1.5 (Optional) Orient the Model 3350 or Model 3700 .................................................................. 9

Chapter 2 Mounting..................................................................................................................... 11

2.1 Mount the applications platform............................................................................................ 11

2.2 Mount the core processor ...................................................................................................... 13

Chapter 3 Wiring ......................................................................................................................... 15

3.1 Connect input and output wiring ........................................................................................... 15

3.2 Connect the Model 3700 to the sensor .................................................................................. 17

3.3 Wire the sensor to the remote core processor........................................................................ 22

3.4 Connect the power supply wiring........................................................................................... 24

Installation Manual 3

4 Model 3700 Transmitters or Model 3350 Peripherals - Field Mount

1 Planning

4 x flat washer

4 x Lock washer

4 x M8x16 bolt assemblies

Mounting bracket

You can orient the transmitter on
the bracket. See Section 1.5.

This installation manual explains basic installation guidelines for installing the Micro Motion
Model 3350 or Model 3700 MVD applications platform.

For information on I.S. applications, refer to Micro Motion approval documentation.
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 the appropriate Micro Motion approval
documentation, shipped with the meter 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 can cause measurement error or meter failure.

Follow all instructions.

Planning

1.1 Installation kit

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

Figure 1-1: Field-mount installation kit

Installation Manual 5

Planning

inches (mm)

Rotate display cover as needed

Rotate mounting bracket as

needed

2 13/16

(71)

4 x 5/16-inch

(9 mm) diameter

9 3/16

(234)

4

(102)

3 5/8

(92)

6

(152)

11

(279)

12

(305)

1.2 Choose a location

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

WARNING!

Improper installation in a hazardous area can cause an explosion.

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

1-3.

1.2.1 Environmental requirements

Install the Model 3350 or Model 3700 where the ambient temperature is between –4 to
+140 °F (–20 to +60 °C).

1.2.2 Dimensions

Figure 1-2: Face view dimensions

6 Model 3700 Transmitters or Model 3350 Peripherals - Field Mount

Figure 1-3: Top view dimensions

Approvals tag

5 1/16-inch (129 mm) clearance for

removal of circuit boards

inches

(mm)

11 5/16

(288)

6 1/8
(158)

15 1/2

(394)

8 11/16

(221)

5 x 3/4-14 NPT or
5 x M20 x 1.5- 6H

Case ground

Mounting surface

inches

(mm)

2 x 15/16

(24)

1 7/8

(48)

2 x 2 13/17

(71)

10 3/8

(265)

7 1/2
(191)

5 3/4
(147)

Planning

Figure 1-4: Conduit openings view dimensions

Installation Manual 7

Planning

Model 3700

4-wire cable

Sensor

Core processor
(standard or enhanced)

1.3 Cable lengths

Maximum cable length from the sensor to the Model 3700 transmitter depends on the
installation type and cable type.

Installation type Maximum cable length

4-wire remote transmitter See Figure 1-5, and Table 1-1 for maximum length of the

Remote core processor with remote
transmitter

If you are installing the Model 3350 controller in combination with a transmitter, the
maximum cable length between the transmitter frequency output and the Model 3350
frequency input is 500 feet (150 meters).

Figure 1-5: 4-wire remote transmitter

4-wire cable

See Figure 1-6, and Table 1-1 for maximum length of the
4-wire cable and the 9-wire cable

Figure 1-6: Remote core processor with remote transmitter

Model 3700

Sensor

4-wire cable

Junction box

8 Model 3700 Transmitters or Model 3350 Peripherals - Field Mount

9-wire cable

Core processor

Planning

Table 1-1: Maximum cable lengths between sensor and transmitter

Cable type Wire gauge Maximum length

Micro Motion 4-wire Not applicable • 1000 ft (300 m) without

Ex-approval

• 500 ft (150 m) with

IIC-rated sensors

• 1000 ft (300 m) with

IIB-rated sensors

Micro Motion 9-wire Not applicable 60 ft (20 m)

User-supplied 4-wire VDC 22 AWG (0.35 mm

VDC 20 AWG (0.5 mm2) 500 ft (150 m)

VDC 18 AWG (0.8 mm

RS-485 22 AWG (0.35 mm
larger

2

) 300 ft (90 m)

2

) 1000 ft (300 m)

2

) or

1000 ft (300 m)

1.4 Prepare conduit openings for ATEX Zone 1 or IECEx Zone 1

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

1. Remove thread protectors from conduit openings. See Figure 1-7.

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

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

1.5 (Optional) Orient the Model 3350 or Model 3700

The Model 3350 or Model 3700 can be oriented on the mounting bracket as needed, and
the display cover can be rotated on the applications platform. Figure 1-7 provides
orientation examples.

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.

3. Rotate the display cover, if needed.

See the transmitter installation manual.

Installation Manual 9

Planning

Conduit openings for

non-intrinsically safe input/output wiring

Conduit openings for intrinsically safe

sensor wiring

Display cover

Conduit openings right Conduit openings down

Conduit openings left

Figure 1-7: Orientation examples

10 Model 3700 Transmitters or Model 3350 Peripherals - Field Mount

2Mounting

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

2.1 Mount the applications platform

• For flat-surface mounting, see Section 2.1.1.

• For pole mounting, see Section 2.1.2.

2.1.1 Mount to a flat surface

1. Mount all four bolts to the same surface.

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

3. Do not secure bolts to any separate beams, girders, wall studs, etc. that can move

independently.

Figure 2-1: Flat surface mounting example

Mounting

Installation Manual 11

Mounting

4 x 5/16 inch nut

(user-supplied)

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

2.1.2 Mount to a pole

Figure 2-2: Pole mounting example

12 Model 3700 Transmitters or Model 3350 Peripherals - Field Mount

2.2 Mount the core processor

Core processor lid

Upper conduit ring

Core processor

Lower conduit ring

End-cap

Mounting bracket

Remote core processor

Remote enhanced core processor

Use this section only if you are installing a remote transmitter using a remote core
processor or a remote enhanced core processor. See Figure 1-6. If you have a 4-wire remote
installation, go to Section 3.1.

Figure 2-3 shows both types of core processors and mounting bracket. Using the mounting

bracket, mount the core processor in a location compatible with the cable length
requirements discussed in Section 1.2.

Figure 2-3: Remote core processor and remote enhanced core processor components

Mounting

Installation Manual 13

Mounting

14 Model 3700 Transmitters or Model 3350 Peripherals - Field Mount

3 Wiring

Intrinsically safe sensor wiring terminals

(blue terminal block)

Circuit board compartment

Wiring compartment

Should remain closed while power is on

Label for sensor wiring terminals

See Figure 3-2

Lockout device

(not supplied with all units)

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

Power supply ground

Label for input/output wiring terminals

Display cover

3.1 Connect input and output wiring

Figure 3-1 shows the location of the wiring terminals on the Model 3350 or Model 3700.

1. Using a flat-head screwdriver, loosen the four captive screws that secure the display

cover to the housing.

2. Connect input/output wiring to the appropriate terminals on the gray terminal block.

Refer to Table 3-1 and to the label attached to the back of the display cover (shown in

Figure 3-1).

2

• Use 22 to 16 AWG (0,35 to 1,5 mm

• 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.

Figure 3-1: Wiring terminals

) twisted-pair shielded wire.

Wiring

Installation Manual 15

Wiring

AC power supply

Terminal 9:

positive

Terminal 10:

negative

Terminal 9: line

(L or L2)

Terminal 10: neutral

(N or L1)

DC power supply

Table 3-1: Input/output wiring terminals

Terminal number Designation

1 – 2 + Primary 4–20 mA output / HART

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 3-2: Wiring terminal labels for Model 3350 or Model 3700

16 Model 3700 Transmitters or Model 3350 Peripherals - Field Mount

3.2 Connect the Model 3700 to the sensor

• If you are installing the Model 3350 controller, this step is not required. Go to Section

3.4.

• To connect the Model 3700 transmitter to a Micro Motion sensor, follow the

instructions in this section.

3.2.1 Installation options

The Model 3700 can be wired to the sensor in either of the following configurations:

• 4-wire remote transmitter (requires a 4-wire cable). See Figure 1-5 and Section 3.2.2.

• Remote core processor with remote transmitter (requires both a 4-wire and a 9-wire

cable). See Figure 1-6 and Section 3.2.3.

3.2.2 Wiring instructions for 4-wire remote installations

1. Prepare the cable as described in the sensor documentation.

2. Connect the cable to the core processor as described in the sensor documentation.

3. To connect the cable to the transmitter:

Wiring

a. Identify the wires in the 4-wire cable.

Use the 4-wire cable supplied by Micro Motion. This cable consists of one pair of 18
AWG (0,75 mm
AWG (0,35 mm

2

) wires (red and black) for the VDC connection, and one pair of 22

2

) wire (green and white) for the RS-485 connection.

b. Connect the four wires from the core processor to the appropriate terminals on the

transmitter.

See Table 3-2 and Figure 3-3 (standard core processor) or Figure 3-3 (enhanced core
processor).

• Do not leave bare wires exposed.

• Do not ground the shield or drain wires at the transmitter.

Table 3-2: Transmitter terminals for 4-wire cable

Terminal Wire color

13 Red VDC+

14 Black VDC–

15 White RS-485A

16 Green RS-485B

(1)

Function

(1) Wire colors apply to only 4-wire cable supplied by Micro Motion.

Installation Manual 17

Wiring

Core processor terminals 4-wire cable Model 3700 terminals

Blue terminal block

See Figure 3-1

Maximum cable length:

See Table 1-1

User-supplied or

factory-supplied cable

16 RS-485B (Green)
15 RS-485A (White)

14 VDC– (Black)

13 VDC+ (Red)

RS-485B (Green)

RS-485A (White)

VDC+ (Red)

VDC– (Black)

Core processor terminals

4-wire cable Model 3700 terminals

Blue terminal block

See Figure 3-1

VDC+ (Red)

RS-485B (Green)

RS-485A (White)

Maximum cable length:

See Table 1-1

User-supplied or

factory-supplied cable

16 RS-485B (Green)
15 RS-485A (White)

14 VDC– (Black)

13 VDC+ (Red)

VDC– (Black)

Figure 3-3: 4-wire cable to Model 3700 standard and remote core processors

Figure 3-4: 4-wire cable to Model 3700 enhanced and remote enhanced core
processors

3.2.3 Wiring instructions for remote core processor with
remote transmitter

There are two phases to this procedure:

• Wiring the remote core processor to the transmitter

• Wiring the sensor to the remote core processor

18 Model 3700 Transmitters or Model 3350 Peripherals - Field Mount

To wire the remote core processor to the transmitter:

1. Use one of the following methods to shield the wiring:

Installation method Procedure

Unshielded wiring in continuous metallic conduit that provides 360°
termination shielding for the enclosed wiring

A user-supplied cable gland with shielded cable or armored cable,
terminate the shields in the cable gland. Terminate both the armored
braid and the shield drain wires in the cable gland

A Micro Motion-supplied cable gland at the core processor housing Go to Step 2

Go to Step 8

Go to Step 8

2. Do one of the following:

• If you are using shielded cable, prepare the cable and apply shielded heat shrink

as described in Step 6. The shielded heat shrink provides a shield termination
suitable for use in the gland when using cable whose shield consists of foil and not
a braid.

• If you are using armored cable, prepare the cable as described in Step 6, but do

not apply heat shrink – omit Steps 6d, e, f, and g.

3. Identify the components shown in Figure 2-3.

4. Remove the core processor lid.

5. Slide the gland nut and the clamping insert over the cable. See Figure 3-5.

Wiring

Installation Manual 19

Wiring

Shielded heat shrink

Gland body

4 1/2 in

(114 mm)

3/4 in

(19 mm)

7/8 in

(22 mm)

7/8 in

(22 mm)

Gland nut

Gland clamping

insert

Figure 3-5: Gland nut and clamping insert

6. For connection at the core processor housing, prepare shielded cable as follows (for
armored cable, omit steps d, e, f, g):

a. Strip 4 1/2 inches (114 mm) of cable jacket.

b. Remove the clear wrap that is inside the cable jacket, and remove the filler material

between the wires.

c. Remove the foil shield that is around the insulated wires, leaving 3/4 inch (19 mm)

of foil or braid and drain wires exposed, and separate the wires.

d. Wrap the shield drain wires around the exposed foil twice. See Figure 3-6. Cut off

the excess wire.

Figure 3-6: Shield drain wires wrapped twice around exposed shield foil

e. Place the shielded heat shrink over the exposed shield drain wires. The tubing

should completely cover the drain wires.

f. Without burning the cable, apply heat (250 °F or 120 °C) to shrink the tubing. See

Figure 3-7.

20 Model 3700 Transmitters or Model 3350 Peripherals - Field Mount

Figure 3-7: Shielded heat shrink covering exposed drain wires

g. Position gland clamping insert so the interior end is flush with the heat shrink.

h. Fold the cloth shield or braid and drain wires over the clamping insert and

approximately 1/8 inch (3 mm) past the O-ring. See Figure 3-8.

Figure 3-8: Folded cloth

Wiring

i. Install the gland body into the core processor housing conduit opening. See Figure

3-9.

Figure 3-9: Installing the gland body

7. Insert the wires through the gland body and assemble the gland by tightening the
gland nut.

8. Identify the wires in the 4-wire cable.
Use the 4-wire cable supplied by Micro Motion. This cable consists of one pair of 18

AWG (0,75 mm
AWG (0,35 mm

2

) wires (red and black) for the VDC connection, and one pair of 22

2

) wire (green and white) for the RS-485 connection.

9. Connect the four wires to the numbered slots on the core processor. See Figure 3-10.

Installation Manual 21

Wiring

Power supply +

(Red wire)

Power supply –

(Black wire)

RS-485A
(White wire)

RS-485B
(Green wire)

Core processor housing internal ground screw

Figure 3-10: Connect the four wires to the numbered slots

10. Connect the core processor housing internal ground screw if earth ground is required.
Earth ground is required if the core processor cannot be grounded via sensor piping,

and local codes require internal ground connections.
Do not connect shield drain wires to this terminal.

11. Reinstall and tighten the core processor lid.

WARNING!

Do not twist the core processor, as this will damage the sensor.

12. To connect the cable to the transmitter, connect the four wires from the core
processor to the appropriate terminals on the transmitter.

See Table 3-2 and Figure 3-3.

• Do not leave bare wires exposed.

• Do not ground the shield or drain wires at the transmitter.

3.3 Wire the sensor to the remote core processor

CAUTION!

Do not allow the shield drain wires to contact the sensor junction box, as this can cause meter
errors.

22 Model 3700 Transmitters or Model 3350 Peripherals - Field Mount

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

Brown
Red
Green
White

Blue
Gray

Orange
Violet
Yellow

Black
(Drains from
all wire sets)

Plug and

socket

Mounting screw

Blue
Gray
Orange

Red
Green
White

Brown

Violet

Yellow

Ground screw

Black

9-wire cable from sensor Core processor

instructions on cable shielding and preparation:

• At the sensor end, follow the instructions for your cable type.

• At t he core processor end, follow the instructions for your cable type with an MVD

transmitter.

2. To connect the wires, refer to Micro Motion’s 9-Wire Flowmeter Cable Preparation and
Installation Guide and follow the instructions for your sensor with an MVD transmitter.
Additional information for connecting the wires at the core processor is provided
below:

a. Identify the components shown in Figure 2-3.

b. Remove the core processor’s end-cap.

c. Insert the 9-wire cable through the conduit opening.

d. Connect the wires to the plugs supplied with the core processor.

e. Insert the plugs into the sockets inside the lower conduit ring. See Figure 3-11.

Figure 3-11:9-wire cable to core processor

Wiring

3. Ground the cable.

Installation Manual 23

Wiring

Cable type Procedure

Jacketed cable Ground the shield drain wires (the black wire) only on the

core processor end, by connecting it to the ground screw
inside the lower conduit ring. Do not ground to the core
processor’s mounting screw. Do not ground the cable at the
sensor junction box.

Shielded or armored cable Ground the shield drain wires (the black wire) only on the

core processor end, by connecting it to the ground screw
inside the lower conduit ring. Do not ground to the core
processor’s mounting screw. Do not ground the cable at the
sensor junction box.

Ground the cable braid on both ends, by terminating it inside
the cable glands.

4. Ensure the integrity of the gaskets, grease all O-rings, then close the junction box
housing and core processor end-cap, and tighten all screws.

CAUTION!

Make sure that the wires are not caught or pinched when you close the housing to reduce the
risk of measurement error or meter failure.

3.4 Connect the power supply wiring

CAUTION!

• Do not install power supply wiring in the same cable tray or conduit as the input/output

wiring to avoid device failure or measurement error.

• Shut off the power supply before installing the applications platform.

• Make sure the power supply voltage matches the voltage that is indicated on the power

supply wiring terminals. See Figure 3-2.

Connect the Model 3350 or Model 3700 to a power supply using the following steps:

2

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

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

3. Ground the transmitter as follows:

a. Connect the ground wire to the green power supply ground screw. See Figure 3-1.

b. Connect the power supply ground wire directly to earth ground.

c. Keep all ground leads as short as possible.

d. Ground wiring must have less than 1 ohm impedance.

4. Connect wires to terminals 9 and 10 on the gray terminal block. See Figure 3-1 and

Figure 3-2.

5. Close the display cover and tighten the screws.

6. (Optional). Install a user-supplied switch in the power supply line.
In Europe, install the switch close to the Model 3350 or Model 3700 in order to comply

with low-voltage directive 2006/95/EC. For details, see standard EN 61010-1:2010
clause 5.4.3.d.

) wire.

24 Model 3700 Transmitters or Model 3350 Peripherals - Field Mount

*20001008*

20001008

Rev BC

2021

For more information: www.emerson.com

©2021 Micro Motion, Inc. All rights reserved.

The Emerson logo is a trademark and service mark of Emerson
Electric Co. Micro Motion, ELITE, ProLink, MVD and MVD Direct
Connect marks are marks of one of the Emerson Process
Management family of companies. All other marks are property of
their respective owners.