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Wiring external devices in an intrinsically safe area (multiple barriers)

Figure 3-12:

Hazardous Area

Non-Hazardous Area

24 VDC

M

Barrier 3

Barrier 1

Barrier 2

3

4

1

2

A

B

C

E

Bus

Bar

mA1+ HART

D

A.

HART Device 1

B.

HART Device 2

C.

HART Device 3

D.

Meter (mA+/HART output)

E.

HART/Field Communicator

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.

•

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

Wiring

Installation Manual

37

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Содержание CDM100M

Страница 1: ...Installation Manual MMI 20020974 Rev AC May 2015 Micro Motion Compact Density Meters Peak performance precision density meter installation ...

Страница 2: ...en 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 www micromotion com or by phoning the Micro M...

Страница 3: ...onal 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 o...

Страница 4: ...Contents ii Micro Motion Compact Density Meter ...

Страница 5: ...or 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 orientatio...

Страница 6: ...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 met...

Страница 7: ...Bypass installation Pressure bend Figure 1 2 Bypass installation Laminar flow Figure 1 3 Important The laminar flow installation is only recommended for processes using refined clean fluids with low viscosity Planning Installation Manual 3 ...

Страница 8: ...Bypass installation Pitot tube Figure 1 4 A A Vent Bypass installation Orifice plate Figure 1 5 A A Orifice plate Planning 4 Micro Motion Compact Density Meter ...

Страница 9: ...igures 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 www micromotion com Planning Installation Manual 5 ...

Страница 10: ... 800 kg m3 Viscosity 2 cP 7835 7845 Sample pressure drop calculations fluid viscosity equals 10 cP Figure 1 8 0 60 0 70 0 40 0 50 0 20 0 30 0 10 CDM100 0 00 0 2 4 6 8 10 12 14 16 Flow Rate m3 hr Pressure Drop Bar Density 800 kg m3 Viscosity 10 cP 7835 7845 1 4 Power requirements Following are the DC power requirements to operate the meter Planning 6 Micro Motion Compact Density Meter ...

Страница 11: ...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 mm2 power supply cable Power cable recommendations for explosion proof flameproof meters Minimum wire gauge AWG per feet Figure 1 9 300ft 600ft 900ft 1200ft 1500ft 1800ft 2100ft 2400ft 2700ft 3000ft Distance of installation 21 6V 24V 14 15 16 17 18 19 20 21 2...

Страница 12: ...m 2 328 084 ft 656 168ft 984 253ft 1312 34ft 1640 42ft 1968 5ft 2296 59ft 2624 67ft 2952 76ft 3280 84ft Power cable recommendations for intrinsically safe meters Minimum wire gauge AWG per feet Figure 1 11 300 600 900 1200 1500 1800 2100 2400 2700 3000 Distance of Installation ft 22 8V 24V 14 15 16 17 18 19 20 21 22 23 24 25 26 AWG Minimum Wire Gauge Planning 8 Micro Motion Compact Density Meter ...

Страница 13: ...e 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 flow support emerson com 3 Position and secure the meter in a vertical position with the flow arrow pointing upwar...

Страница 14: ...tion 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 Planning 10 Micro Motion Compact Density Meter ...

Страница 15: ...imize 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 Mounting Installation Manual...

Страница 16: ...eter in any orientation All pipework joints and couplings must be airtight to minimize the presence of gas bubbles in the fluid 2 2 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 Mounting 12 Micro Motion Compact Density Meter ...

Страница 17: ...mitter 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 2 3 Rotate the display on the transmitter optional The display on the transmitter electronics module can be rotated 90 or 180 from the original position Mounting Installation Manual 13 ...

Страница 18: ...ub 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 th...

Страница 19: ... 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 mm2 Important Output wiring requirements depend on whether the meter wil...

Страница 20: ... 3 2 Explosion proof flameproof or non hazardous output wiring 3 2 1 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 Wiring 16 Micro Motion Com...

Страница 21: ...irective 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 m...

Страница 22: ...meproof 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 2 Wiring 18 Micro Motion Compact Density Meter ...

Страница 23: ...tput 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 ear...

Страница 24: ...r meter Safety instructions are available on the Micro Motion Product Documentation DVD and accessible on the Micro Motion website at www micromotion com 3 3 1 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 explosi...

Страница 25: ...apacitance Co 85 nF External inductance Lo 154 µH External inductance resistance ratio Lo Ro 31 1 µH Ω Cable parameters for Group IIB External capacitance Co 660 nF External inductance Lo 610 µH External inductance resistance ratio Lo Ro 124 4 µH Ω Hazardous area voltage The meter entity parameters require the selected barrier s open circuit voltage to be limited to less than 30 VDC Vmax 30 VDC Ha...

Страница 26: ...ormation on ordering a barrier kit CAUTION Meter installation and wiring should be performed by suitably trained personnel only in accordance with the applicable code of practice 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...

Страница 27: ...UTION 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 36...

Страница 28: ...ance with the applicable code of practice 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 The galvanic isolator kit Analog version provides isolators for connecting the following outputs Use the provided isolators with the des...

Страница 29: ...he 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 en...

Страница 30: ...nly in accordance with the applicable code of practice 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 The galvanic isolator kit TPS Discrete version provides isolators for connecting the following outputs Use the provided iso...

Страница 31: ...o 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 contr...

Страница 32: ... MTL5532 switch location plus ON OFF switch position Figure 3 6 1 2 3 4 OFF ON MTL5532 switch settings Table 3 4 Switch ON OFF 1 ON 2 OFF 3 OFF 4 OFF 3 4 Processor wiring for remote mount 2700 FOUNDATION fieldbus option 3 4 1 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 voltag...

Страница 33: ... Internal resistance Ri 19 8 Ω Cable parameters for Group IIC Maximum external capacitance Co 85 nF Maximum external inductance Lo 25 µH Maximum external inductance resistance ratio Lo Ro 31 1 µH Ω Cable parameters for Group IIB Maximum external capacitance Co 660 nF Maximum external inductance Lo 260 µH Maximum external inductance resistance ratio Lo Ro 124 4 µH Ω 3 4 2 Prepare the 4 wire cable I...

Страница 34: ...Done do not perform the shielding procedure Gland supplier User supplied cable gland Lay cable in conduit Drain wires wrapped around shield Gland type Pass the wires through the gland nut and clamping insert Clamping insert Gland nut 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 j...

Страница 35: ... Braided armored cable Foil shielded cable Done Terminate the shield and drain wires in the gland Assemble the gland according to vendor instructions Gland supplier Micro Motion cable gland User supplied cable gland From the preparation procedure After heat applied Shield folded back Gland body Gland type M20 Trim 7 mm from the shielded heat shrink Shielded heat shrink Trim NPT 4 wire cable types ...

Страница 36: ...remote mount 2700 FF transmitter Figure 3 9 A B C D A White wire to RS 485 A terminal B Green wire to RS 485 B terminal C Red wire to Power supply terminal D 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...

Страница 37: ...the meter The following information provides wiring diagrams for making those connections in safe and hazardous environments 3 5 1 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 Wiring Installation Manual 33 ...

Страница 38: ...er 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 ...

Страница 39: ...ng to determine your cable parameters for each device Sum the Ci and Li parameters for each device connected Subtract the sum from the Co and Lo for the barrier Configure all devices to be operating at a fixed 4 mA output Wiring Installation Manual 35 ...

Страница 40: ...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...

Страница 41: ...omagnetic 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 termin...

Страница 42: ...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 Wiring 38 Micro Motion Compact Density Meter ...

Страница 43: ...e 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...

Страница 44: ... 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 con...

Страница 45: ... standards are applicable follow these guidelines to ground the meter Use copper wire 18 AWG 0 75 mm2 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 ...

Страница 46: ...ingapore 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 Emerson Process Management 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 i...

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