Micro Motion CDM100M Installation manual

Installation Manual

MMI-20020974, Rev AC

May 2015

Micro Motion

®

Compact Density Meters

Peak performance precision density meter installation

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 are available on the internet at

www.micromotion.com

or through your local Micro Motion support center.

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 is available on our web support system at


, or by phoning the

Micro Motion Customer Service department.

Emerson Flow customer service

Email:

•

•

Worldwide:

[email protected]

Asia-Pacific:

[email protected]

Telephone:

North and South America

United States 800-522-6277

Canada

Mexico

Argentina

Brazil

Venezuela

+1 303-527-5200

Europe and Middle East

U.K.

The Netherlands

+41 (0) 41 7686 111 France

+54 11 4837 7000

+55 15 3413 8000

+58 26 1731 3446

Germany

Italy

Central & Eastern

Russia/CIS

0870 240 1978

+31 (0) 704 136 666 New Zealand

0800 917 901

0800 182 5347

8008 77334

+7 495 981 9811

Asia Pacific

Australia

India

Pakistan

China

+41 (0) 41 7686 111 Japan

South Korea

Egypt

Oman

Qatar

Kuwait

South Africa

Saudi Arabia

UAE

0800 000 0015

800 70101

431 0044

663 299 01

800 991 390

800 844 9564

800 0444 0684

Singapore

Thailand

Malaysia

800 158 727

099 128 804

800 440 1468

888 550 2682

+86 21 2892 9000

+81 3 5769 6803

+82 2 3438 4600

+65 6 777 8211

001 800 441 6426

800 814 008

Contents

Contents

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

1.1

Installation checklist .......................................................................................................................1

1.2

Best practices .................................................................................................................................2

1.3

Pressure drop in the meter ............................................................................................................. 5

1.4

Power requirements .......................................................................................................................6

1.5

Perform a pre-installation meter check ...........................................................................................9

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

2.1

Mount the meter ..........................................................................................................................11

2.2

Rotate the electronics on the meter (optional) .............................................................................12

2.3

Rotate the display on the transmitter (optional) ...........................................................................13

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

3.1

Available output terminals and wiring requirements .................................................................... 15

3.2

Explosion-proof/flameproof or non-hazardous output wiring .......................................................16

3.3

Hazardous area output wiring ...................................................................................................... 20

3.4

Processor wiring for remote-mount 2700 FOUNDATION fieldbus

™

option ....................................28

3.5

Wiring to external devices (HART multidrop) ................................................................................33

3.6

Wiring to signal converters and/or flow computers ...................................................................... 38

Chapter 4 Grounding ......................................................................................................................41

Installation Manual

i

Contents ii

Micro Motion Compact Density Meter

1

1.1

Planning

Planning

Topics covered in this chapter:

•

Installation checklist

•

Best practices

•

Pressure drop in the meter

•

Power requirements

•

Perform a pre-installation meter check

Installation checklist

□

Make sure that the hazardous area specified on the approval tag is suitable for the environment in which the meter will be installed.

□

Verify that the local ambient and process temperatures are within the limits of the meter.

□

If your meter will be wired to a remote-mount 2700 FOUNDATION fieldbus

™ transmitter:

Refer to the instructions in this manual for preparing the 4-wire cable and wiring to the processor connections.

Refer to the instructions in the transmitter installation manual for mounting and wiring the 2700 FOUNDATION fieldbus

™

transmitter. See Micro Motion

Model 1700 and Model 2700 Transmitters: Installation Manual.

Consider the maximum cable length between the meter and transmitter. The maximum recommended distance between the two devices is 1000 ft (300 m).

Micro Motion recommends using Micro Motion cable.

□

For optimal performance, install the meter in the preferred orientation.

The meter will work in any orientation as long as the vibrating tubes remain full of the process fluid. However, you should validate the meter performance prior to operation if you have installed it in a non-preferred orientation.

Table 1-1: Preferred meter orientation

Liquids and slurries


□

Install the meter so that the flow direction arrow on the meter case matches the actual forward flow of the process. (Flow direction is also software-selectable.)

1

2

Planning

1.2

1.2.1

Best practices

The following information can help you get the most from your meter.

• Handle the meter with care. Follow local practices for lifting or moving the meter.

• Perform a Known Density Verification (KDV) check of the meter prior to installing the meter in your system.

• Install the meter in the preferred orientation in a vertical pipeline with liquids and slurries flowing upward.

Important

If you do not install the meter in the preferred orientation, you may need to apply a field offset to ensure optimal performance. Refer to your organizational standards for sampling and reference measurement to determine what the offset may be.

• Do not apply a compression force greater than 200 lbs (90.7 kg) when installing the meter.

• Thermally insulate the meter and the inlet and bypass-loop pipeline to maintain stable temperatures.

• There are no pipe run requirements for Micro Motion meters. Straight runs of pipe upstream or downstream are unnecessary.

• Keep the meter tubes full of process fluid.

• For halting flow through the meter with a single valve, install the valve downstream from the meter.

• Minimize bending and torsional stress on the meter. Do not use the meter to align misaligned piping.

• The meter does not require external supports. The flanges will support the meter in any orientation.

• Installing the meter in a bypass configuration allows you to remove the meter for servicing or calibration without affecting the main pipeline

(

Recommended installations for bypass configurations

).

Recommended installations for bypass configurations

The following figures illustrate typical bypass configurations for installing the meter.


Figure 1-1: Bypass installation: S-Bend

Figure 1-2: Bypass installation: Pressure bend

Planning

Figure 1-3: Bypass installation: Laminar flow


Important

The laminar flow installation is only recommended for processes using refined, clean fluids with low viscosity.

3

Planning

Figure 1-4: Bypass installation: Pitot tube

A

A.

Vent

Figure 1-5: Bypass installation: Orifice plate

A

A.

Orifice plate

4


Planning

Figure 1-6: Bypass installation: Pump

A

C

B

1.3

A.

B.

C.

Vent

Sample point

Pump

Pressure drop in the meter

The pressure drop in the meter depends on the process conditions. The following figures illustrate the pressure drop for the meter at varying fluid density and viscosity. In addition, these charts show how the meter compares to the Micro Motion 7835/7845 liquid density meters.

Important

For the most accurate pressure drop calculations using your process variables, use the Micro Motion product selector available at


.


5

Planning

6

1.4

Figure 1-7: Sample pressure drop calculations (fluid viscosity equals 2 cP)

Density = 800 kg/m

3

Viscosity = 2 cP

0.40

0.35

0.30

0.25

0.20

0.15

0.10

0.05

0.00

0 2 4 6 8 10

Flow Rate (m 3 /hr)

12 14 16

7835

CDM

/

7845

Figure 1-8: Sample pressure drop calculations (fluid viscosity equals 10 cP)

Density = 800 kg/m

3

Viscosity = 10 cP

0.70

0.60

0.50

0.40

0.30

0.20

0.10

0.00

0 2 4 6 8 10

Flow Rate ( m

3 /hr)

12 14 16

7835

/

7845

CDM100

Power requirements

Following are the DC power requirements to operate the meter:



Planning

•

Explosion-proof/flameproof meters:

24 VDC, 0.65 W typical, 1.1 W maximum

•

Minimum recommended voltage: 21.6 VDC with 1000 ft of 24 AWG (300 m of

0.20 mm

2

) power-supply cable

At startup, power source must provide a minimum of 0.5 A of short-term current at a minimum of 19.6 V at the power-input terminals.

Intrinsically safe meters:

24 VDC, 0.7 W typical with 250 Ω barrier, 0.96 W maximum with 250 Ω barrier

Minimum recommended voltage: 22.8 VDC with 1000 ft of 22 AWG (300 m of

0.25 mm

2

) power-supply cable

Power cable recommendations for explosion-proof/flameproof meters

Figure 1-9: Minimum wire gauge (AWG per feet )

26

25

24

23

20

19

18

17

22

21

16

15

14

300ft 600ft 900ft 1200ft 1500ft 1800ft 2100ft 2400ft 2700ft 3000ft

91.44m 182.88m 274.32m 365.76m 457.2m 548.64m 640.08m 731.52m 822.96m 914.4m

Distance of installation

2

24

1 .

6V

V

7

Planning

Figure 1-10: Minimum wire area (mm

2

per meter)

0.700

0.600

0.500

0.400

0.300

0.200

0.100

0 .

00 0

10 0m 20 0m 30 0m 40 0m 50 0m 60 0m 70 0m 80 0m 90 0m 100 0m

328.084 ft 656.168ft 984.253ft 1312.34ft 1640.42ft

1968.5ft

2296.59ft

2624.67ft 2952.76ft 3280.84ft

Distance of installation

2 1 .

6V

24 V

Power cable recommendations for intrinsically safe meters

Figure 1-11: Minimum wire gauge (AWG per feet)

Minimum Wire Gauge

26

25

24

23

22

21

20

19

18

17

16

15

14

300 600 900 1200 1500 1800 2100 2400 2700 3000

Distance of Installation (ft)

22.8V

24V

8


Figure 1-12: Minimum wire area (mm

2

per meter)

Minimum Wire Area (mm

2

)

0.900

0.850

0.800

0.750

0.700

0.650

0.600

0.550

0.500

0.450

0.400

0.350

0.300

0.250

0.200

0.150

0.100

0.050

0.000

100 200 300 400 500 600 700

Distance of Installation (m)

800 900 1000

22.8V

24V

Planning

1.5

Perform a pre-installation meter check

1.

Remove the meter from the box.

CAUTION!

Handle the meter with care. Follow all corporate, local, and national safety regulations for lifting and moving the meter.

2.

Visually inspect the meter for any physical damage.

If you notice any physical damage to the meter, immediately contact Micro Motion

Customer Support at

[email protected]

.

3.

Position and secure the meter in a vertical position with the flow arrow pointing upward.

4.

Connect the power wiring, and power up the meter.

Remove the back transmitter housing cover to access the PWR terminals.


9

Planning

Figure 1-13: Power supply wiring terminals

3

1

MTL7728P+

4

2

A

A. Barrier wiring is applicable to intrinsically safe installations only

5.

Perform a Known Density Verification (KDV) check.

Use the Known Density Verification procedure to match the current meter calibration with the factory calibration. If the meter passes the test, then it has not drifted or changed during shipment.

For more information on performing a KDV check, see the configuration and use manual that shipped with the product.

10


2

2.1

Mounting

Mounting


•

Mount the meter

•

Rotate the electronics on the meter (optional)

•

Rotate the display on the transmitter (optional)

Mount the meter

Use your common practices to minimize torque and bending load on process connections.

Tip

To reduce the risk of condensation or excessive moisture, the transmitter conduit opening should not point upward (if possible). The conduit opening of the transmitter can be rotated freely to facilitate wiring.

CAUTION!

Do not lift the meter by the electronics. Lifting the meter by the electronics can damage the device.


11

Mounting

Figure 2-1: Mounting the sensor

2.2

Notes

•

•

•

Do not use the meter to support the piping.

The meter does not require external supports. The flanges will support the meter in any orientation.

All pipework joints and couplings must be airtight to minimize the presence of gas bubbles in the fluid.

Rotate the electronics on the meter (optional)

You can rotate the transmitter on the meter up to 90°.

1.

Using a 4 mm hex key, loosen the cap screw that holds the transmitter in place.

12


Figure 2-2: Component to secure transmitter in place

Mounting

2.3

A

A. M5 socket-head cap screw

2.

Rotate the transmitter clockwise to the desired orientation up to 90°.

3.

Secure the cap screw in place and tighten to 60 lb·in (6.8 N·m).

Rotate the display on the transmitter

(optional)

The display on the transmitter electronics module can be rotated 90° or 180° from the original position.


13

Mounting

Figure 2-3: Display components

A

B

C

D

E

14

D

A.

B.

C.

D.

E.

Transmitter housing

Sub-bezel

Display module

Display screws

Display cover

Procedure

1.

If the meter is powered up, power it down.

2.

Turn the display cover counterclockwise to remove it from the main enclosure.

3.

Carefully loosen (and remove if necessary) the semi-captive display screws while holding the display module in place.

4.

Carefully pull the display module out of the main enclosure until the sub-bezel pin terminals are disengaged from the display module.

Note

If the display pins come out of the board stack with the display module, remove the pins and reinstall them.

5.

Rotate the display module to the desired position.

6.

Insert the sub-bezel pin terminals into the display module pin holes to secure the display in its new position.

7.

If you have removed the display screws, line them up with the matching holes on the sub-bezel, then reinsert and tighten them.

8.

Place the display cover onto the main enclosure.

9.

Turn the display cover clockwise until it is snug.

10.

If appropriate, power up the meter.


3

3.1


Wiring

Wiring


•

Available output terminals and wiring requirements

•

Explosion-proof/flameproof or non-hazardous output wiring

•

Hazardous area output wiring

•

Processor wiring for remote-mount 2700 FOUNDATION fieldbus

™

option

•

Wiring to external devices (HART multidrop)

•

Wiring to signal converters and/or flow computers

Available output terminals and wiring requirements

Three pairs of wiring terminals are available for transmitter outputs. These outputs vary depending on your transmitter output option ordered. The Analog (mA), Time Period

Signal (TPS), and Discrete (DO) outputs require external power, and must be connected to an independent 24 VDC power supply.

For meters connecting to a remote-mount 2700 FOUNDATION fieldbus

™

transmitter, you must wire the meter to the remote-mount 2700 transmitter using a 4-wire cable connection. See the processor wiring content in this manual for information on how to wire the meter. Refer to the transmitter installation manual for information on wiring the remote-mount 2700 FOUNDATION fieldbus

™

transmitter.

The screw connectors for each output terminal accept a maximum wire size of 14 AWG

(2.5 mm

2

).

Important

• Output wiring requirements depend on whether the meter will be installed in a safe area or a hazardous area. It is your responsibility to verify that this installation meets all corporate, local, and national safety requirements and electrical codes.

• If you will configure the meter to poll an external temperature or pressure device, you must wire the mA output to support HART communications. You may use either HART/mA singleloop wiring or HART multi-drop wiring.

Table 3-1: Transmitter outputs

Transmitter version

Analog

Time period signal (TPS)

Output channels

A B

4–20 mA + HART 4–20 mA

4–20 mA + HART Time Period Signal (TPS)

C

Modbus/RS-485

Modbus/RS-485

15

Wiring

3.2

3.2.1

Table 3-1: Transmitter outputs

(continued)

Transmitter version

Discrete

Processor for remote-mount 2700

FOUNDATION fieldbus

™

Output channels

A B

4–20 mA + HART Discrete output

Disabled Disabled

C

Modbus/RS-485

Modbus/RS-485

Explosion-proof/flameproof or non-hazardous output wiring

Wire the Analog outputs version in an explosion-proof/ flameproof or non-hazardous area

CAUTION!

Meter installation and wiring should be performed by suitably trained personnel only in accordance with the applicable code of practice.

Procedure

Wire to the appropriate output terminal and pins (see

Figure 3-1

).

16



Wiring

Figure 3-1: Wiring the Analog outputs

mA1+

HART mA2

RS-485

A

B

PWR

A

A

B

B

C

D

RS-485 A

RS-485 B

A

A. 24 VDC

B. R load

(250 Ω resistance)

C. HART-compatible host or controller; and/or signal device

D. Signal device

Note

For operating the milliamp outputs with a 24V supply, a maximum total loop resistance of 657 allowed.

Ω

is

CAUTION!

• To meet the EC Directive for Electromagnetic Compatibility (EMC), use a suitable instrumentation cable to connect the meter. The instrumentation cable should have individual screens, foil or braid over each twisted pair, and an overall screen to cover all cores. Where permissible, connect the overall screen to earth at both ends (360° bonded at both ends).

Connect the inner individual screens at only the controller end.

• Use metal cable glands where the cables enter the meter amplifier box. Fit unused cable ports with metal blanking plugs.

17

Wiring

3.2.2

Wire the Time Period Signal (TPS) or Discrete output version in an explosion-proof/flameproof or nonhazardous area

CAUTION!


Procedure

Wire to the appropriate output terminal and pins (see

Figure 3-2

).

18



Figure 3-2: Wiring the TPS or Discrete output version

mA1+

HART

TPS/DO

RS-485

A

B

PWR

A

A

B

D

C

E

RS-485 A

RS-485 B

A

Wiring

A. 24 VDC

B. R load

(250 Ω resistance)

C. HART-compatible host or controller; and/or signal device

D. R load

(500

Ω

resistance recommended)

E. Signal converter/flow computer or discrete input device

Note

• For operating the milliamp output with a 24V supply, a maximum total loop resistance of 657 allowed.

Ω

is

• When operating the TPS or Discrete output with a 24 VDC power supply, a maximum total loop resistance of 1300

Ω

is allowed.

CAUTION!

• To meet the EC Directive for Electromagnetic Compatibility (EMC), use a suitable instrumentation cable to connect the meter. The instrumentation cable should have individual screens, foil or braid over each twisted pair, and an overall screen to cover all cores. Where permissible, connect the overall screen to earth at both ends (360° bonded at both ends).

Connect the inner individual screens at only the controller end.


19

Wiring

3.3

3.3.1

Hazardous area output wiring

Micro Motion provides safety barrier and galvanic isolator installation kits for wiring the meter in a hazardous environment. These kits provide the appropriate barriers or isolators depending on the outputs available and approvals required.

Information provided about wiring the safety barriers and galvanic isolators is intended as an overview. You should wire the meter according to the standards that are applicable at your site.

•

•

CAUTION!


Refer to the hazardous area approvals documentation shipped with your meter. Safety instructions are available on the Micro Motion Product Documentation DVD and accessible on the Micro Motion website at

www.micromotion.com

.

Hazardous area entity parameters

DANGER!

Hazardous voltage can cause severe injury or death. To reduce the risk of hazardous voltage, shut off power before wiring the meter.

DANGER!

Improper wiring in a hazardous environment can cause an explosion. Install the meter only in an area that complies with the hazardous classification tag on the meter.

Input entity parameters

Table 3-2: Input entity parameters: all connections

Parameter Power supply

Voltage (U i

)

Current (I i

)

Power (P i

)

30 VDC

484 mA

2.05 W

Internal capacitance

(C i

)

0.0 pF

Internal inductance (L i

) 0.0 H

4–20 mA /Discrete

Output/Time Period

Signal

30 VDC

484 mA

2.05 W

0.0 pF

0.0 H

RS-485

18 VDC

484 mA

2.05 W

0.0011 pF

0.0 H

20



Wiring

RS-485 output and cable parameters

All connections to the meter receive their power from the connected intrinsically safe barrier. All cable parameters are derived from the output parameters of these devices. The

RS-485 connection also receives power from the connected barrier (MTL7761AC), although this connection has specific output and cable parameters.

Table 3-3: RS-485 output and cable entity parameters (MTL7761AC)

Input parameters

Voltage (U i

)

Current (I i

)

Internal capacitance (C i

)

Internal inductance (L i

)

Output parameters

Voltage (U o

)

Current (instantaneous) (I o

)

Current (steady state) (I)

Power (P o

)

Internal resistance (R i

)

Cable parameters for Group IIC

External capacitance (C o

)

External inductance (L o

)

External inductance/resistance ratio (L o

/R o

)

Cable parameters for Group IIB

External capacitance (C o

)

External inductance (L o

)

External inductance/resistance ratio (L o

/R o

)

18 VDC

100 mA

1 nF

0.0 H

9.51 VDC

480 mA

106 mA

786 mW

19.8

Ω

85 nF

154 µH

31.1 µH/

Ω

660 nF

610 µH

124.4 µH/

Ω

Hazardous area voltage

Hazardous area current

Hazardous area capacitance

The meter entity parameters require the selected barrier’s opencircuit voltage to be limited to less than 30 VDC (Vmax = 30 VDC).

The meter entity parameters require the selected barrier’s shortcircuit currents to sum to less than 484 mA (Imax = 484 mA) for all outputs.

The capacitance (Ci) of the meter is 0.0011 μF. This value added to the wire capacitance (Ccable) must be lower than the maximum allowable capacitance (Ca) specified by the safety barrier. Use the following equation to calculate the maximum length of the cable between the meter and the barrier: Ci + Ccable ≤ Ca

21

Wiring

3.3.2

Hazardous area inductance

The inductance (Li) of the meter is 0.0 μH. This value plus the field wiring inductance (Lcable), must be lower than the maximum allowable inductance (La) specified by the safety barrier. The following equation can then be used to calculate the maximum cable length between the meter and the barrier: Li + Lcable ≤ La

Wire all intrinsically safe using safety barriers

Micro Motion provides a safety barrier installation kit for wiring the meter in a hazardous area. Contact your local sales representative or Micro Motion Customer Support at

[email protected]

for more information on ordering a barrier kit.

•

•

CAUTION!




.

The safety barrier kit provides barriers for connecting all of the available meter outputs.

Use the provided barriers with the designated output.

Output(s)

4–20 mA

• 4–20 mA

• Time Period Signal (TPS)

• Discrete

Modbus/RS-485

Power

Barrier

MTL7728P+

MTL7728P+

MTL7761AC

MTL7728P+

Procedure

Wire the barriers to the appropriate output terminal and pins (see

Figure 3-3

).

22


Figure 3-3: Intrinsically safe mA/DO/TPS output wiring using safety barriers

Hazardous Area Non-Hazardous Area

Bus

Bar mA1+

HART mA2/

TPS/DO

RS-485

PWR

A

B

3 1

MTL7728P+

4

2

3 1

MTL7728P+

4

2

3

1

MTL7761AC

4

2

3

1

MTL7728P+

4

2

24 VDC

24 VDC

250 Ω

A

C

B

RS-485 A

RS-485 B

24 VDC

Wiring

A. HART/Field Communicator device

B. Signal device

C. The recommended resistance will vary depending on your Channel B output. For mA outputs, 250

Ω is the recommended resistance. For TPS or Discrete outputs, 500–1000 Ω is the recommended resistance.

CAUTION!

• In an electrically noisy environment, screen the cable in a safe area.

• To meet the EC Directive for Electromagnetic Compatibility (EMC), use a suitable instrumentation cable to connect the meter. The instrumentation cable should have individual screens, foil or braid over each twisted pair, and an overall screen to cover all cores. Where permissible, connect the overall screen to earth at both ends (360° bonded at both ends). Connect the inner individual screens at only the controller end.

• For safety, do not terminate the inner individual screens to earth in a hazardous area.



23

Wiring

3.3.3

Wire the intrinsically safe Analog outputs version using galvanic isolators

Micro Motion provides a galvanic isolator installation kit specific to wiring the Analog version of the meter in a hazardous area. Contact your local sales representative or

Micro Motion Customer Support at

[email protected]

for more information on ordering an isolator kit for your meter.

•

•

CAUTION!




.

The galvanic isolator kit (Analog version) provides isolators for connecting the following outputs. Use the provided isolators with the designated output.

Note

The RS-485 barrier is not isolated.

Output(s)

4–20 mA + HART

4–20 mA

Modbus/RS-485

Power

Isolator

MTL5541

MTL5541

MTL7761AC

MTL5523

Procedure

Wire the isolators to the appropriate output terminal and pins (see

Figure 3-4

).

24


Wiring

Figure 3-4: Intrinsically safe output wiring using galvanic isolators (mA outputs option)

Hazardous Area Non-Hazardous Area mA1+

HART

2

1

14

13

12

11

24 VDC

250 Ω

A mA2

RS-485

A

B

2

1

14

13

12

11

3

4

1

2

24 VDC

250 Ω

B

RS-485 A

RS-485 B

PWR

2

1

14

13

12

11

LINK

24 VDC

A. HART/Field Communicator device

B. Signal device

CAUTION!






25

Wiring

3.3.4

Wire the intrinsically safe Time Period Signal (TPS) or

Discrete output version using galvanic isolators

Micro Motion provides a galvanic isolator installation kit specific to wiring the Time Period

Signal (TPS) and Discrete versions of the meter in a hazardous area. Contact your local sales representative or Micro Motion Customer Support at

[email protected]

for more information on ordering an isolator kit for your meter.

•

•

CAUTION!




.

The galvanic isolator kit (TPS/Discrete version) provides isolators for connecting the following outputs. Use the provided isolators with the designated output.

Note

The RS-485 barrier is not isolated.

Output(s)

4–20 mA + HART

• Time Period Signal (TPS)

• Discrete

Modbus/RS-485

Power

Isolator

MTL5541

MTL5532

MTL7761AC

MTL5523

Procedure

1.

Wire the isolators to the appropriate output terminal and pins (see

Figure 3-5

).

26


Wiring

Figure 3-5: Hazardous area output wiring using galvanic isolators (TPS and Discrete output options)


HART

TPS/DO

RS-485

A

B

2

1

14

13

12

11

1 kΩ

1

4

SIG

11

12

5

13

14

3

4

1

2

24 VDC

250 Ω

A

1 kΩ

24 VDC

B

RS-485 A

RS-485 B

PWR

2

1

14

13

12

11

LINK

24 VDC

A. HART/Field Communicator

B. Signal device

CAUTION!






27

Wiring

2.

Set the isolator switch settings for the TPS/DO connection (MTL5532 isolator). You

must set the isolator switches appropriately for Pins 1 through 5 (see

Table 3-4

).

The switches are located on the side of the isolator, and must be set to either Off (the up position) or On (the down position).

Figure 3-6: MTL5532 switch location (plus ON/OFF switch position)

1 2 3 4

OFF

ON

3.4

3.4.1

Table 3-4: MTL5532 switch settings

2

3

4

Switch

1

ON/OFF?

ON

OFF

OFF

OFF

Processor wiring for remote-mount 2700

FOUNDATION fieldbus

™

option

RS-485 entity parameters for the remote-mount 2700

FOUNDATION fieldbus

™

option

DANGER!

Hazardous voltage can cause severe injury or death. To reduce the risk of hazardous voltage, shut off power before wiring the meter.

28


3.4.2

Wiring

DANGER!

Improper wiring in a hazardous environment can cause an explosion. Install the meter only in an area that complies with the hazardous classification tag on the meter.

Table 3-5: RS-485 output and cable entity parameters

Cable parameters for intrinsically safe circuit (linear)

Voltage (U i

)

Current (I i

)

Maximum capacitance (C i

)

Maximum inductance (L i

)

17.22 VDC

484 mA

1 nF

Negligible

Cable parameters for Ex ib IIB, Ex ib IIC

Voltage (U o

)

Current (instantaneous) (I o

)

Current (steady state) (I)

Power (P o

)

Internal resistance (R i

)

9.51 VDC

480 mA

106 mA

786 mW

19.8

Ω

Cable parameters for Group IIC

Maximum external capacitance (C o

)

Maximum external inductance (L o

)

Maximum external inductance/resistance ratio

(L o

/R o

)

Cable parameters for Group IIB

Maximum external capacitance (C o

)

Maximum external inductance (L o

)

Maximum external inductance/resistance ratio

(L o

/R o

)

85 nF

25 µH

31.1 µH/

Ω

660 nF

260 µH

124.4 µH/

Ω

Prepare the 4-wire cable

Important

For user-supplied cable glands, the gland must be capable of terminating the drain wires.

Note

If you are installing unshielded cable in continuous metallic conduit with 360º termination shielding, you only need to prepare the cable – you do not need to perform the shielding procedure.


29

Wiring

Figure 3-7: 4-wire cable preparation

Remove the integral processor cover

Cable glands

Cable layout

Metal conduit

Micro Motion cable gland

Gland supplier

Pass the wires through the gland nut and clamping insert.

Gland nut

Clamping insert

User-supplied cable gland

Run conduit to sensor

NPT

Gland type M20

1. Strip 4-1/2 inch (115 mm) of cable jacket.

2. Remove the clear wrap and filler material.

3. Strip all but 3/4 inch (19 mm) of shielding.

1. Strip 4-1/4 inch (108 mm) of cable jacket.

2. Remove the clear wrap and filler material.

3. Strip all but 1/2 inch (12 mm) of shielding.

Pass the wires through the gland.

Terminate the drain wires inside the gland.

Lay cable in conduit

Done

(do not perform the shielding procedure)

Wrap the drain wires twice around the shield and cut off the excess drain wires.

Drain wires wrapped around shield

Go to the shielding procedure

30


Figure 3-8: 4-wire cable shielding

From the preparation procedure

Cable shield type

Micro Motion cable gland

Foil

(shielded cable)

Gland supplier

User-supplied cable gland

Braided

(armored cable)

NPT Gland type

Apply the Heat Shrink

1. Slide the shielded heat shrink over the drain wires. Ensure that the wires are completely covered.

2. Apply heat (250 °F or 120 °C) to shrink the tubing. Do not burn the cable.

3. Position the clamping insert so the interior end is flush with the braid of the heat shrink.

Shielded heat shrink

After heat applied

M20

Trim 7 mm from the shielded heat shrink

Trim

Assemble the Gland

1. Fold the shield or braid back over the clamping insert and 1/8 inch

(3 mm) past the O-ring.

2. Install the gland body into the conduit opening on the core processor housing.

3. Insert the wires through gland body and tighten the gland nut onto the gland body.

Shield folded back

Gland body

Terminate the shield and drain wires in the gland

Assemble the gland according to vendor instructions

Wiring


Done

4-wire cable types and usage

Micro Motion offers two types of 4-wire cable: shielded and armored. Both types contain shield drain wires.

The 4-wire cable supplied by Micro Motion consists of one pair of red and black 18 AWG

(0.75 mm

2

) wires for the VDC connection, and one pair of white and green 22 AWG

(0.35 mm

2

) wires for the RS-485 connection.

User-supplied 4-wire cable must meet the following requirements:

31

Wiring

3.4.3

• Twisted pair construction.

• Applicable hazardous area requirements, if the core processor is installed in a hazardous area.

• Wire gauge appropriate for the cable length between the core processor and the transmitter.

• Wire gauge of 22 AWG or larger, with a maximum cable length of 1000 feet.

Processor wiring for the remote-mount 2700

FOUNDATION fieldbus

™

option

The following figure illustrates how to connect the individual wires of a 4-wire cable to the processor terminals. For detailed information on mounting and wiring to the remotemount 2700 FOUNDATION fieldbus transmitter, see the transmitter installation manual.

Figure 3-9: Processor (Modbus/RS-485) connections to the remote-mount 2700 FF transmitter

A

B

C

D

32

A.

B.

C.

D.

White wire to RS-485/A terminal

Green wire to RS-485/B terminal

Red wire to Power supply (+) terminal

Black wire to Power supply (–) terminal

Important

•

•

To meet the EC Directive for EMC (Electromagnetic Compatibility), it is recommended that the meter be connected using a suitable instrumentation cable. The instrumentation cable should have individual screen(s), foil or braid over each twisted pair and an overall screen to cover all cores.

Where permissible, the overall screen should be connected to earth at both ends (360° bonded at both ends). The inner individual screen(s) should be connected at only one end, the controller end.

Metal cable glands should be used where the cables enter the meter amplifier box. Unused cable ports should be fitted with metal blanking plugs.


3.5

3.5.1

Wiring

Wiring to external devices (HART multidrop)

You can wire up to three external HART devices with the meter. The following information provides wiring diagrams for making those connections in safe and hazardous environments.

Wire mA1 in a HART multi-drop environment

Important

To wire power and outputs, see

Wire power and outputs in a HART single-loop environment

.


33

Wiring

Figure 3-10: Wire mA1 in a HART multi-drop environment

A

24 VDC

B

250 Ω E

C

D mA1+ HART

A.

B.

C.

D.

E.

HART Device 1

HART Device 2

HART Device 3

Meter (mA+/HART output)

HART/Field Communicator

•

•

CAUTION!

To meet the EC Directive for Electromagnetic Compatibility (EMC), use a suitable instrumentation cable to connect the meter. The instrumentation cable should have individual screens, foil or braid over each twisted pair, and an overall screen to cover all cores. Where permissible, connect the overall screen to earth at both ends (360° bonded at both ends). Connect the inner individual screens at only the controller end.

Use metal cable glands where the cables enter the meter amplifier box. Fit unused cable ports with metal blanking plugs.

3.5.2

Wire external HART devices in an intrinsically safe area

You can wire up to three external HART devices in an intrinsically safe environment.

Following are diagrams showing a HART multidrop connection using a single barrier

connection (see

Figure 3-11

) and multiple barrier connections (see

Figure 3-12

).

34


Wiring

When connecting to a single barrier, do the following to determine your cable parameters

(for each device):

• Sum the C i

and L i

parameters for each device connected.

• Subtract the sum from the C o

and L o

for the barrier.

• Configure all devices to be operating at a fixed 4 mA output.


35

Wiring

Figure 3-11: Wiring external devices in an intrinsically safe area (single barrier)


A

B

C

Bus

Bar

3

MTL7728P+

1

4

2

24 VDC

E

D

A.

B.

C.

D.

E.

mA1+ HART

HART Device 1

HART Device 2

HART Device 3



•

•

•

•

CAUTION!

In an electrically noisy environment, screen the cable in a safe area.


For safety, do not terminate the inner individual screens to earth in a hazardous area.


36


Wiring

Figure 3-12: Wiring external devices in an intrinsically safe area (multiple barriers)


Bus

Bar

A

Barrier 1

B

C

D mA1+ HART

Barrier 2

Barrier 3

3 1

MTL7728P+

4 2

E

24 VDC

A.

B.

C.

D.

E.

HART Device 1

HART Device 2

HART Device 3



•

•

•

•

CAUTION!






37

Wiring

3.6

Wiring to signal converters and/or flow computers

For meters with a Time Period Signal (TPS) output, you can wire the meter to an signal converter or flow computer directly. The following information provides wiring diagrams for making those connections in safe and hazardous environments.

When wiring the meter to an active HART host or signal converter/flow computer, you are not required to provide external power to the output connections. These active devices provide the 24 VDC necessary for these connections.

38


3.6.1

Wire to a signal converter/flow computer in an explosion-proof/flameproof or non-hazardous area

Figure 3-13: Wiring to a signal converter/flow computer in an explosion-proof/ flameproof or non-hazardous area

mA1+

HART

A

Wiring

B

TPS

RS-485

A

B

PWR

RS-485 A

RS-485 B

24 VDC

A.

B.

Active HART host

Active signal converter/flow computer

•

•

CAUTION!




39

Wiring

3.6.2

Wire to a signal converter/flow computer in an intrinsically safe area

Figure 3-14: Wiring to a signal converter/flow computer in an intrinsically safe area


HART

TPS

RS-485

A

B

PWR

3

4

2

1

3

4

2

1

3

4 2

1

3

4

1

2

A

B

RS-485 A

RS-485 B

24 VDC

A.

B.

Active HART host

Active signal converter/flow computer

•

•

•

•

CAUTION!





40


4

Grounding

Grounding

The meter must be grounded according to the standards that are applicable at the site.

The customer is responsible for knowing and complying with all applicable standards.

Prerequisites

Micro Motion suggests the following guides for grounding practices:

• In Europe, EN 60079-14 is applicable to most installations, in particular Sections

12.2.2.3 and 12.2.2.4.

• In the U.S.A. and Canada, ISA 12.06.01 Part 1 provides examples with associated applications and requirements.

• For IECEx installations, IEC 60079-14 is applicable.

If no external standards are applicable, follow these guidelines to ground the meter:

• Use copper wire, 18 AWG (0.75 mm

2

) or larger wire size.

• Keep all ground leads as short as possible, less than 1 Ω impedance.

• Connect ground leads directly to earth, or follow plant standards.

CAUTION!

Ground the meter to earth, or follow ground network requirements for the facility. Improper grounding can cause measurement error.

Procedure

Check the joints in the pipeline.

If the joints in the pipeline are ground-bonded, the sensor is automatically grounded and no further action is necessary (unless required by local code).

If the joints in the pipeline are not grounded, connect a ground wire to the grounding screw located on the sensor electronics.


41

*MMI-20020974*

MMI-20020974

Rev AC

2015

Micro Motion Inc. USA

Worldwide Headquarters

7070 Winchester Circle

Boulder, Colorado 80301

T +1 303-527-5200

T +1 800-522-6277

F +1 303-530-8459

www.micromotion.com

Micro Motion Europe

Emerson Process Management

Neonstraat 1

6718 WX Ede

The Netherlands

T +31 (0) 70 413 6666

F +31 (0) 318 495 556

www.micromotion.nl

Micro Motion Asia


1 Pandan Crescent

Singapore 128461

Republic of Singapore

T +65 6777-8211

F +65 6770-8003

Micro Motion United Kingdom

Emerson Process Management Limited

Horsfield Way

Bredbury Industrial Estate

Stockport SK6 2SU U.K.

T +44 0870 240 1978

F +44 0800 966 181

Micro Motion Japan


1-2-5, Higashi Shinagawa

Shinagawa-ku

Tokyo 140-0002 Japan

T +81 3 5769-6803

F +81 3 5769-6844

©

2015 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.

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