Micro Motion Remote Flow Transmitter - Model RFT9729 Owner's manual

March 1991

Rosemount, SMART FAMIL~ and HART are trademarks of Rosemount Inc.. Eden Prairie. MN.

Hastelloy is the trademark of Gabot Gorp.. Kokomo. IN.

Teflon is the trademark of E.I. Du Pont de Nemours Go. Inc.. Wilmington. DL.

1991. Micro Motion. Inc

Tables

3

16

Table 1

Table 2

Specifications AFT 9729 to OMS Wiring,

Figures

Mounting Dimensions 8

Back Panel Connections 10

Wiring Diagram for the D6 through D300 14

Wiring Diagram for the D600 15

RS-485 Wiring 17

HART Network Wiring 18

Location of Jumpers and Test Points on the Processor Board 20

Changing the Jumper Settings 20

Figure 1-1

Figure 2-1

Figure 2-2

Figure 2-3

Figure 2-4

Figure 2-5

Figure 3-1

Figure 3-2

Table of Contents

1

2

3

1

1.1

1.2

1.2:1

1.2.2

1.2.3

1.3

1.4

1.5

1.5.1

The Remote Flow Transmitter General Description Theory of Operation Communication Fault Detection and Diagnostics Meter Zeroing Independent Exchange of Flow Sensors and Transmitters.

Modular Electronics Display Totalizer Reset Button

2

2.1

2.2

2.3

2.4

2.4.1

2.4.2

2.4.3

2.5

2.5.1

2.5.2

2.5.3

2.5.4

2.5.5

2.5.6

Transmitter Installation 9

General 9

Installing the Transmitter 9

Power Connections 10

Signal Wiring; Sensor to the Transmitter 11

Cable Connections 11

Sensor Conduit Connections 12

Intrinsically Safe Wiring Requirements 12

Transmitter Output Wiring 12

Analog Output Wiring 12

Frequency Output Wiring 13

Flow Direction Wiring 13

DMS Wiring 13

RS-485 Wiring 16

Multidrop Wiring for the Milliamp Output 16

3

3.1

3.2

3.3

3.4

3.5

3.5.1

3.6

3.6.1

3.6.1.1

3.6.1.2

3.7

Start-Up 19

Jumper Configuration on the Processor Board 19

Power. 21

Transmitter Auto Zeroing 21

Using the LED 21

General Guidelines 21

Symptom Definitions 22

Trouble-shooting 22

Trouble-shooting the RFT 9729 23

Wiring 23

Internal Test Points 23

Customer Service 24

Appendix I

Appendix II

Appendix III

Exploded Drawing of the RFT9729 25

RFT9729 Configuration Record 26

Model 268 SMART FAMILY@ Interface Flow Diagram 28

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The Remote Flow lrransmitter

1.1 General Description

The Micro Motion@ Remote Flow Transmitter (RFT9729) is a microprocessor-based

mass flow transmitter. The transmitter, in conjunction with a Micro Motion flow sensor,

forms a complete mass flowmeter system.

The transmitter converts the low-Ievel signals from the sensor to 4-20 mA and frequency

outputs. The 4-20 mA signal can be configured to transmit a flow rate, temperature, or

density signal. The frequency output is always a flow rate signal. The transmitter also pro-

duces digital signals for flow rate, flow total, density, and temperature that can be read by

a Rosemount@ Model 268 SMART FAMILY Interface or a HART-compatible controlsys-

tern. Optionally, RS-485 can be selected as a digital communications medium.

1.2 Theory of Operation

Circuitry in the transmitter compensates for individual flow sensor characteristics,

allowing interchange with any Micro Motion Model D flow sensor.

The RFf9729 interfaces with Model D Mass Flowmeters. The input circuit measures the

signals from the left and right velocity detectors on the sensor tube(s). The input data is

digitally filtered to reduce noise and increase the measurement resolution. This input data

is then converted into flow rate data using the flow calibration factor and the sensed

temperature.

The drive circuit generates an oscillatory voltage to vibrate the tubes. The frequency of

oscillation is at the natural frequency of the sensor, and therefore, a process fluid density

measurement can be calculated from the measured natural frequency of the sensor.

A temperature amplifier converts the resistance of the sensor-mounted platinum RTD to a

linearized voltage (i.e., 5 mV per OC) for digitization, temperature compensation of the

sensor, and the Density Monitoring System (DMS) output. The temperature compensa-

tion has a resolution of 0.1°C and a range of -240° to 450°C (-400° to 842°F).

The transmitter can be easily used with another Micro Motion sensor simply by entering

the correct calibration data.

1.2.1 Communication

The transmitter is programmed to communicate with other digital equipment using the

HART protocol. For more information on transmitter protocol, please refer to the Remote

Flow Transmitter Digital Communications Instruction Manual, July, 1989, PIN 1002798.

Device interconnection is accomplished by using the transmitter mA output terminals.

As an alternative, an RS-485 interface is also available through jumper configuration on

the processor board and is compatible with the transmitter protocol.

1.2.2 Fault Detection and

Diagnostics

The SMART FAMILY Interface (268) allows direct digital configuration and access to

diagnostics of the transmitter. The 268 connects to the transmitter via the 4-20 mA

current output loop and communicates with the transmitter at the transmitter site, from the

control room, or from any other wiring termination point in the loop. The 268 is generic

and can be used with any RFT9729 transmitter. The same 268 can also be used with any

Rosemount SMART FAMILY transmitter. For more information on the 268, see the

instruction manual entitled Using the SMART FAMILY Interface 268 with the Micro

Motion Remote Flow Transmitter, Section 1.

The digital communications protocol is designed to assist in fault detection and

diagnostics. Fault detection is designed to ensure the functional integrity of the meter and

electronics including the velocity transducers, drive coil, and RTD. During start-up, the

RFT9729 microprocessor checks its RAM and EPROM. A watchdog timer monitors the

operation of the microprocessor to ensure recovery from software malfunctions.

Detected faults, which could cause an error exceeding the accuracy specification, can be

displayed on the 268. Within the RFT9729 itself, if a fault is detected that may indicate

malfunc.'tion of the flowmeter, the mA and frequency outputs are set to an upscale or

downscale level (see Section 3.1, Jumper Configuration on the Processor Board) as an

indication that a failure has occurred. Also, the LED on the front panel flashes on at 4 Hz if

a fault condition occurs. The LED flashes on at 1 Hz during normal operation.

1.2.3 Meter Zeroing

Zero flow adjustment (i.e., sensor offset adjustment) is accomplished with the Set Zero

Flow key switch on the front panel, an externally wired set zero switch, or with the

communications protocol auto zero command. During zero flow adjustment, the LED on

the front panel remains on indicating that a zero flow calibration is in progress. The

transmitter will not allow an excessive sensor offset during meter zeroing, protecting

against zeroing while excessive fluid flow exists. See Section 3.3, Transmitter Auto

Zeroing.

1.3 Independent Exchange of

Flow Sensors and

Transmitters

Transmitters and flow sensors may be replaced separately since each sensor is

calibrated at the factory and marked with flow calibration and density calibration factors.

Sensors and transmitters calibrated at the factory have matching serial numbers on their

respective nameplates. To match different transmitters and flow sensors, the calibration

factors are simply entered into the transmitter using the communications protocol. No ad-

ditional calibration or equipment is necessary. For sensors manufactured before calibra-

tion factors were put on each unit, contact Micro Motion at 1-800/522-MASS (522-6277)

in Boulder, Colorado for the U.S., or 31-08385-63911 in Veenendaal, the Netherlands, for

Europe. Also, your local service/sales office can assist you.

1.4 Modular Electronics

The electronics in the transmitter can be removed from the housing and replaced

separately, This is facilitated by modular construction and plug-in cable connectors (See

Appendix I, Exploded Drawing). Interchangeability allows one electronics module to

serve as a spare for many transmitters.

1.5 Display

A 4 line, 20 character display is incorporated in the RFT9729 front panel. This display

shows the following information:

Flowrate (*)

Density (*)

Temperature (*:

Totalizer

(*) denotes which process variable is the mA output (one only).

2

1.5.1 Totalizer Reset Button

The totalizer reset button has 2 functions. If the button is depressed and kept in position,

the totalizer value is stopped. When released the totalizer value is reset to zero.

Table 1 Specifications

Flow Sensor Compatibility

Functional Specifications

Compatible with all Model D sensors with either 7 -wire or 9-wire feedthroughs and 3-wire

platinum RTD (temperature sensor).

Compatible with all Model DL sensors with either 7-wire or 9-wire feedthrough or Camloc

connector and 3-wire platinum RTD.

Compatible with all Model D sensors with 2-wire copper RTD when rewired as 3-wire at

sensor cable interconnection. Temperature and density measurement accuracy will be

somewhat degraded.

Rangeability

Flow: Minimum span equal to 4.0 microsec. of time difference between velocity sensor

signals. Maximum span equal to 240.0 microsec. of time difference between velocity

sensor signals. Range limits from -120.0 microsec. to +120 microsec. time difference

between velocity signals. Zero may be suppressed or elevated. The 50:1 electronics

rangeability encompasses the range limits of the flow sensor. See sensor specifications

for min. and max. spans of individual sensors.

Density: Minimum span of 0.1 g/cc.

Maximum span of 5.0 g/cc.

Range limits from 0.0 to 5.0 g/cc

Temperature: Lower limit of -240°C (-400°F)

Upper limit of 450°C (840°F)

Minimum span of 20°C

Maximum span of 690°C

Power Supply

Standard: 12 to 30 VDC, 6.5 watts typical, 14 watts maximum. 1 amp minimum start-up

current. Fuse rating: 2 amp. Fuse located on back panel.

Optional: 115 VAG :t25%, 48 to 62 Hz, 9 watts typical, 14 watts maximum or 230 VAG

:t25%, 48 to 62 Hz, 9 watts typical, 14 watts maximum. Fuse rating: 0.25 amp. Fuse

located on back panel.

Humidity Limits

Meets SAMA PMC 31.3, Section 5.2

Ambient Temperature Limits

Operating

0 to 50°C (32 to 122°F)

Storage

-20 to 70°C (-4 to 158°F)

3

Output Signals

* 4 to 20 mA, internally powered, galvanically isolated to :t50 VDC, 0 to 1000 ohm load.

The mA output can represent flow rate, temperature, or density (user-configurable). Maxi-

mum ripple of 1.5% of span at greater than 20 kHz.

* 0 to 15 volt frequency representing flow rate, 2.2k ohm pull-up, galvanically isolated to

:t50 VDC. Sinking capability 0.10 amps in the .'on" condition (0 V level), 30 VDC compli-

ance with the internal pull-up removed in the '.off" condition. Maximum "on" pulse width

of 6, 12, or 24 milliseconds, depending on configuration.

* Bell 202 digital communications signal superimposed on 4-20 mA signal, available for

host control system interface. Frequency 1.2 and 2.2 kHz, amplitude 1.0 to 2.0 mA peak-

to-peak, baud rate 1200 bits-per-second. Load resistance between 250 and 1000 ohms

required. HART protocol compatible.

Optional: RS-485 digital communication signal referenced ~o sensor ground. Amplitude

:t5 V square wave, baud rate 1200 bits-per-second. HARr protocol compatible.

* 0 to 15 volt flow direction, 2.2k ohm pull-up, referenced to frequency output return line.

Sinking capability 0.10 amps in the "on" condition (reverse flow) 30 VDC compliance

with the internal pull-up removed in the "off" condition (forward flow).

* 2.5 VAG at sensor natural frequency, referenced to sensor ground, 10k ohm output

impedance. Used for interface to Micro Motion Density Monitoring System.

* 5 mVrC sensor temperature, referenced to sensor ground, 10k ohm output

impedance. Used for interface to Micro Motion Density Monitoring System.

ScaJeabJe mA Output Adjustment

Engineering units and range points user-selectable between rangeability limits for either

flow rate, temperature, or density.

Scaleable Frequency Output Adjustment

* Frequency set point scaleable from 1 to 10,000 Hz in 1 Hz increments.

* Flow rate set-point scaleable from minimum span to upper range limit. Zero flow rate

always equals zero Hz, frequency linear to flow rate.

Frequency output replaced by 2ND mA output

The secondary milliamp output replaces the frequency output. This has consequences for the

hardware as well as the software.

Hardware

The connection terminal points for the secondary milliamp output are:

-48-pin connector (24b) 4-20mA-

(28b) 4-20mA+

Software. (Programming)

Standardwise both mA-outputs will be adjusted to meet in our factory the desired range unless

otherwise specified.

In case the secondary mA-output must be (re)adjusted one will have to do this through the fre-

quency function key with a SFI268 interface.

The 10.000 Hz point corresponds with the 20 mA output.

For example: -desired range 0-500 kg/h

-secondary mA-output 4-20 mA over the above mentioned rate.

Frequency must be programmed to be 10.000 Hz at 500 kg/h. Automatically

the 20 mA will correspond with 500 kg/h.

4

Slug Flow Inhibit

Transmitter senses density outside of user-selectable density limits and drives the flow

outputs to indicate zero flow.

Scaleable Low Flow Cutoff

Engineering units and low-ftow cutoff value user-selectable. Below selected value, digital,

milliamp and frequency outputs are driven to zero.

Damping

User-selectable: 0.2, 0.4, 0.8, 1.6, 3.2, 6.4, or 12.8 seconds time constant.

Over Range Capability

* Milliamp output 2 mA (-12.5% of span) to 22 mA (+112.5% of span)

* Frequency output 11 ,520 Hz

Diagnostics

User-selectable downscale (2 mA and a Hz) or upscale (22 mA and 11520 Hz) when

failure of auto zero, sensor, temperature sensor, or electronics is detected.

Output Testing

* Current source:

Transmitter may be commanded to supply a specified current between 2 and 22 mA.

* Frequency source:

Transmitter may be commanded to supply a specified frequency between 1 and 10,000

Hz.

Turn-On Time

Less than 10 seconds

Warm-Up Time

Transmitter reaches stable operation in less than 30 minutes.

Sensor Compensation

Sensors are flow and density calibrated and assigned calibration factors at the factory.

The calibration factors are entered into the transmitter enabling interchangeability of sen-

sors within 0.1% of reading on flow accuracy, 0.001 g/cc on density accuracy and 0.5°C

:to.25% of reading in °C on temperature accuracy.

Hazardous Location Certification

CENELEC

[EEx ib] lIB* or [EEx ib] IIC*

* with approved sensor

5

Performance Specifications

(Reference operating conditions unless otherwise specified. Definitions per AN81/18A

851.1 -1979 unless otherwise specified.)

Accuracy (sensor included):

(includes effects of linearity, hysteresis, and repeatability)

Flow: :to.2010 of rate :to.O1010 of sensor upp~r range limit.

Density: .:to.001 g/cc; DL 100, DL200, D300, and D600

:to.002 g/cc; D65, D100 and D150

:to.004 g/cc; D40, D25, D12, ~nd D6

Temperature: :t1 °G :to.5% of reading expr~ssed in "G

Repeatability (sensor included):

Flow: :!=0.05% of rate :!=0.005% of sensor upper range limit

Density:

:to.OOO5 g/cc; OL 100, OL200, 0300, and 0600

:to.OO10 g/cc; 065, 0100 and 0150

:to.OO2 a g/cc; 040, 025, 01 ~, and 06

:to.2°C

Temperature:

Ambient Temperature Effect (transmitter on/~)

Flow: Zero effect :to.OO2% of sensor upper range limit tC.

Span effect :to.OO2% of span tC.

Density:

:to.00005 g/cc/"F; OL 100, OL200, 0300, and 0600

:to.0001 g/ccrF; 065, 0100 and 0150

:to.0002 g/ccrF; 040, 025, 012, and 06

Temperature:

Analog :to.O1 "Ct'C

Digital :to.10''Ct'C

RFI Effect (sensor excluded)

Level 1, :to.8% of span at 1 Vim per IEC 8d1.3 -1984

Level 2, :t4.00% of span at 3 Vim per IEC 801.3 -1984

Class 3, A, B, C, :to.8% of span at 1 Vim pftr SAMA PMC 33.1

Class 1, A, B, C, :t4.00% of span at 3 Vim per SAMA PMC 33.1

Class 2, A, B, C, :t15% of span at 10 Vim per SAMA PMC 33.1

Conductive conduit for sensor cable, which is earth grounded at both ends, is required

for RFI protection within this specification.

Vibration Effect (transmitter only)

Meets SAMA PMC 31.1, Level

6

Supply Voltage Effect (sensor included)

Meets supply voltage effect requirements of SAMA PMC 31

5.10.5

section 5.10.1 through

Physical Specifications

Electronics Housing

Half 19" cassette. 42TEx 3HE; gray PVC-coated panels

Dimensions: 213 W by 128 H by 235 mm D (8.4 W by 5 H by 9.3 in D)

Weight: 2,6 kg (5.7 Ib)

Electrical Connections

Din 41612 Type F 48 pole connector for sensor and output signals. Separate main

supply connector is available.

Cable from Sensor to Transmitter

3 individually shielded twisted pairs, ,minimum 20 AWG, for 7 wire sensors. Less than 30

pF-per-foot interwire capacitance u~ to 500 ft (150 meters) total cable length.

4 individually shielded twisted pairs,: minimum 22 AWG, minimum 18 AWG for drive pair

for 9 wire sensors. Less than 30 pF-li>er-foot interwire capacitance up to 1000 ft (300 me-

ters) total cable length.

7

Figure 1.1

Mounting Dimensions

RFT9729

37 TE

(188 mm)

~

~ ~ RFT 9729 Remote Flow T"c,m,l!e,

~

6'

E

...

"'

~

E

UJ E

I "

M aj

N

I~ ~~-~

0

42 TE

(213 mm)

FRONT

SIDE

8

2

Transmitter Installation

2.1 General

For information regarding installation of the flow sensor, please refer to the Micro Motion

Sensor Instruction Manual. This instruction manual is included with the sensor when

shipped from the factory.

The transmitter should be placed in an easily accessible place in a safe area.

Use separate conduits or cable trays for power and signal wiring. Cable tray installation

requires Micro Motion supplied Teflon@ wiring or equivalent cable tray compatible wiring.

Transmitter wiring connections are located on the back panel of the unit.

Wiring connections to the 025 through 0300 sensors are made within the supplied

juction box. The juction box is not attached to the sensor when shipped. Attach and posi-

tion the junction box on the sensor manifold as desired. Unscrew the junction box cover

to access the 9-position terminal strip. Wiring instructions are placed in the juction box

when it is shipped from the factory with a sensor. Refer to these directions when making

connections to the transmitter.

For applications in which cable temperatures are above 150°F (65°C) or below 32°F

(0°C), the light blue, Teflon-jacketed cable should be used. For applications in which

temperatures stay between 32° to 150°F (0° to 65°C), the medium blue, PVC-jacketed

cable can be used. The standard cable supplied is 10 feet (3 meters) long. Up to 1000

feet (300 meters) of cable can be used between the transmitter and sensor. Cable lengths

between 10 and 1000 feet are available from the factory.

~ Note: Operation of the meter may be detrimentally affected if cable other than Micro Mo-

tion color-coded cable is used.

WARNING: To maintain intrinsic safety and performance, only low power signal

cables can be routed through the conduit alongside the sensor wiring.

2.2 Installing the Transmitter

When mounting the transmitter, Micro Motion recommends following the practices

described below.

1. Mount the transmitter in an environment which protects it from ambient temperatures

below 00 or above 50°C (below 32°F or above 122°F).

2. Accessibility is important when mounting the transmitter. Be sure to mount the unit so

that it is accessible for calibration, reconfiguration, reading data or servicing.

9

2.3 Power Connections

'k / DANGER: POWER MUST BE OFF WHEN MAKING WIRING CONNECTIONS.

The transmitter comes set up for either 12 to 30 VDG, 100/115 VAG, or 220/230 VAG.

CAUTION: Power supply voltage must agree with the voltage stated on the

selector switch mounted on the back panel.

AC input power connections are made at seperate terminals of the transmitter indicated

with P, N, and the ground symbol. The individual terminal blocks may be disconnected

and removed from the housing for ease of wiring and service. When the meter is used

with a OC power supply, terminal 20 is positive and terminal 28 is negative. Earth ground

is established at the ground lug at the back panel and must be connected (See Fig. 2-1 ).

CAUTION: Failure to connect earth ground to the ground lug in the terminal

compartment will nullify the meter's intrinsically safe rating.

Figure 2-1

Back Panel

Connections

i 13TE

1!66MM>

-..

w

F: MAINS SELECTOR

(S) ON

Dp

EARTH

O,25A O ZER~

ZERO +

2A O Mb

MA+

~ D '-'NU I

LED +

BACKPLANE BOARD RFT9729 = D

W.O96.B.443 REV 1 LED -

S.O97.B.203 REV 1 D

~

@1

H

~

("\

I I

I

U

A

230V

J1

188 BI

1%:

O

(/)

z

w

(/)

~

.:1

A

~

BACK

10

2.4 Signal Wiring; Sensor to

the Transmitter

2.4.1 Cable Connections

Signal connections are made via the interconnect cable between the sensor unit and

terminals 8 through 26 of the transmitter. Refer to Figures 2-2 for Models 06 through

0300 and Figure 2-3 for the Model 0600. Only low power signal cables may be routed

through conduit alongside the sensor wiring if intrinsic safety requirements must be

maintained.

The transmitter end of the cable must be prepared in the field. Micro Motion, Inc. supplies

the necessary butt-splices, sp'ade-Iugs, shrink-tubing, solder-sleeve connection wire, and

instructions with each meter. Individual wires are color-coded for easy identification.

Refer to Figure 2-2 or 2-3 to connect cable to the transmitter.

Wiring connections to the 025 through 0300 sensors are made within the supplied junc-

tion box. The junction box is not attached to the sensor when shipped. Attach and posi-

tion the junction box on the sensor manifold as desired. Unscrew the junction box cover

to access the 9-position terminal strip. Wiring instructions are placed in the junction box

when it is shipped from the factory with a sensor. Refer to these directions when making

connections to the transmitter.

~ Note: For 7-wire feedthrough sensors, the wires must be paired exactly as shown below.

~ If the cable is not supplied by Micro Motion, Inc., make certain each pair is individually

shielded and that 20 gauge or larger diameter wire is used. The ground shield for the wire

pair connected to terminal 14 and 16 must be connected to the yellow wire at the sensor

junction box and to terminal 12 at the transmitter. Be sure that the bare shields are insu-

lated against potential shorting, such as to the meter case.

-Wires connected to transmitter terminals 10d (brown) and 8d (red) must be paired to-

gether.

-Wires connected to terminals 14d (orange) and 16d (violet) must be paired together.

-Wires connected to terminals 20d (green) and 24d (blue) must be paired together.

-Ground shield for the pair connected to terminals 14d and 16d must connect to terminal

12d (yellow)

-Ground shields for the other wire pairs connect to terminal 26d at the transmitter and are

not connected at the sensor.

For 9-wire feedthrough sensors, the pairing is as follows:

-Wires connected to transmitter terminals 10d (brown) and Bd (red) must be paired to-

gether.

11

Wires connected to terminals 14d (orange) and 16d (violet) must be paired together.

Wires connected to terminals 20d (green) and 18d (white) must be paired together.

Wires connected to terminals 24d (blue) and 22d (gray) must be paired together.

-Ground shield for the pair connected to terminals 14d and 16d must connect to terminal

12d (yellow)

-Ground shields for the other wire pairs connect to terminal 26d at the transmitter and are

not connected at the sensor.

2.4.2 Sensor Conduit

Connections

Flexible conduit shou!d be UL listed as explosion-proof. Explosion-proof conduit is not

required with the sensor wiring for intrinsic safety on sensors up to and including the

D300. The connection must, however, be sealed.

2.4.3 Intrinsically Safe Wiring

Requirements

The terminal area of the transmitter is partitioned to separate intrinsically safe wiring from

non-intrinsically safe wiring. Intrinsically safe wiring to the sensor is labeled "Intrinsically

Safe Terminals." Only sensor wiring should enter this connector.

2.5 Transmitter Output Wiring

Wiring to output devices should be separated from input power wiring to avoid possible

electrical interference. Therefore, separate connectors are provided for output devices.

Outputs are not intrinsically safe.

2.5.1 Analog Output Wiring

When connecting a receiver to the RFT9729 milliamp output circuit, terminals 14b and

16b are used. Terminal 16b is the signal line (+) and terminal 14b is the return (-). The

negative signal (terminal 14) may be grounded or left ungrounded since it is galvanically

isolated up to :t50 VDC. Twisted pair, shielded cable should be used for long runs.

The 4-20 mA signal output can power loop-powered process indicators, such as the Mi-

cro Motion Model PI 4-20 Process Indicator. A minimum loop resistance of 250 ohms is

required for SMART FAMILY communication. The maximum loop resistance cannot ex-

ceed 1000 ohms. Shields for the output signals should be connected to ground only at

the transmitter end (terminal 2z, 4 b d z).

12

2.5.2 Frequency Output Wiring

(Optionally replacable

by 2nd current output)

The frequency output is galvanically isolated up to :f:50 VDC. The output circuit is rated to

30 VDC, 0.1 ampere maximum sinking capability. The output from the transmitter is a

nominal 15 volt logic level square wave, unloaded. The output impedance is 2.2k ohms at

the 15 volt logic level. If receivers other than Micro Motion products are used, please refer

to their instruction or operating manuals their input voltage and current requirements.

To connect a frequency output receiver, use terminal 28b (+) as the signal line and

terminal 24 (-) as the return. The frequency output wiring should be twisted pair and no

smaller than 22 gauge shielded cable. Shields for the output signals should be

connected to ground only at the transmitter end (terminal 2z, 4 b d z).

2.5.3 Flow Direction Wiring

To connect the transmitter for flow direction indication, use terminal 26b (+) as the signal

line and terminal 24b (-) as the return. The output circuit is rated to 30 VDC, 0.1 ampere

maximum sinking capability. The output from the transmitter is a nominal 0 to 15 volt

logic level, unloaded. The output impedance is 2.2k ohms at the 15 volt logic level. With

forward flow, the output is high (+15 V); with reverse flow, the output is low (0 V). Near

zero flow, this output could be in either state due to zero stability. The flow direction out-

put can be used as an input to directional totalizers such as the Micro Motion DRT.

2.5.4 OMS Wiring

To connect the RFT9729 to a Density Monitoring System (DMS), use three-wire shielded

cable. Use of a DMS barrier is not necessary with the RFT9729. No more than 500 feet of

shielded cable should be used between the RFT9729 and the DMS. Wire size should be

22 gauge or larger diameter.

13

Figure 2-2

Wiring Diagram for

the D6 through D300

Installation Instructions

Type Cenelec

Intrinsically safe outputs

CNc ad drive- -red

10d drive+ -brn

12d temp gnd -yel

14d temp- -or

16d temp+ -viol

18d LPO- -whc

20d LPO+ -grn

22d RPO- -grey

24d RPO+ -blue

2ad shield -shield

Non Intrinsically safe outputs

CN2 2d see terminal connection

2b on page 16

2z

4bdzL

6b zero-

8b zero+

1Ob 485A

12b 4858

14b mA-

16b mA+

18b DMS gnd

2Ob DMS temp

22b DMS period

24b Freq FIR-

26b FIR+

28b Freq.+

3Ob Led+

32b Led-

Non-h.z.rdou. Art.

(~ution

1 10 malnt~ln Intrlnsl(1

sale1 y, sale wlrin!,

must be separatec

Ifrom all other

wlrln(j

d b

2

W'

o

~

[8]

0=0

*

110/11SV ...

.

p

N

Intrinsi(~l(y s~fe

output termin~(s

e>

I

220/230V p N

/ Potential Equalizer

/

Caution: power supply must agree with the

voltage stited on selectorswitch.

-+

32

I Transmitter I

I RFT9729 I

/

~ Bro",ni

Red

Orange

2

or Gry "nd Vlht

(for 9 vlir"" only) 3

Shield Gnd (Yel)

Green

[Jlue

Violet

/'"7

,'-~,,- /)~

'~-;;i~-~~..-':;;'

Malch wire color

~ ov,;recOIOrw;lh , the 7 or 9 butl spl;ces

al sensor

,CL-.-f '--'-' c

!c L-! ~

:, "~LI c

e

7 WIRES

Brov/n

-Red

-Orange

-Shield Gnd (Yell

-Green

= Blue

-Violet

or 9 WiRES

Brown

-Red

-Orange

-While -

-Shield Gnd (Yell

-Gray

~ Green

Blue

-V,olel

',',cro Mo:iOn mass flowmc!cr

sys:cm Conncc!;on lor

in"insically sa!e ODCra'ion

For use """ '"oce's

DC ','" D3C-) ," ,ers'crs SuD"ti"c

"S c:"S'CJ"1 so"'

--

Model D25D300

'oGol DG/u'2

*

See page 16

14

Installation Instructions

Type Cenelec

Figure 2-3

Wiring Diagram for

the D600

Non Intrinsically safe outputs

CN2 2d see terminal connection

2b on page 16

2z

4bdz-,

6b zero-

8b zero+

10b 485A

12b 485B

14b mA-

16b mA+

18b DMS gnd

20b DMS temp

22b DMS period

24b Freq FIR-

26b FIR+

28b Freq+

3Ob Led+

32b Led-

Intrinsically safe outputs

CN1 8d drive- -red

1Od drive+ -brn

12d temp gnd -yec

14d temp- -or

16d temp+ -vioc

18d LPo- -whL

20d LPO+ -grn

22d RPo- -grey

24d RPO+ -blue

26d shield -shield

Ciution

I To milntiln Intrinsic sitety. site ~iring I

2 must be sepirited

Itrom ill other

.~Irlno

d b' z

o

~

[8]

0:0

110/115V I p I N I.

0

I

*

Intrinsically safe

output terminals

220/23~~j p I N I.

I !J 32

Potential Equalizer

Caution: power supply must agree with the

voltage stated on selectorswitch.

132

I Tr~nsmitter I

I RFT9729 I

~

(

safe

{for 9 WIRE only)

I ~I

/

r

CAUTION Power supply vollagc

musl agrcc w;th the vollagc stalcd

on Ihc vollagc labcl ;ns;dc Ihc

explos;on.proof hous;ng

100/115 VAC 50160 Hz G N H

220/230 VAC 60160 Hz G L2 L,

E

ID

.to be sealed

afterw;r;ng

123456789

eeeee~eeee

Power -~

To d,;ve co;1

k)cated ;n

mass flow

meter Idr;ve

co;1 ;s

prool also)

~

,0

M"ro Mol;on mass Ilowmeter

sY"em connection lor

;n"ins"ally safe operation

I Cablejunclion

I box

~~~

e

For use w;'h modo'

D600 ;n vers;ons suPp';od as

;nlr;ns;cally salel

explos;on proof

/ Explosion-proof housing

Voltage label -

Explo5;On-proof I lnlr;n5;cally sale

Model DSOO

* See page 16

15

FAST.ON I SOLDERING TERMINAL

d b z

d,-,z

J~I~g~ ~~earth

ie-d ,-~p

-~~I~ C)N

; ,

04 mm2-J I .

earth

p

N

r-,--c -

P'N:...

L-:--L~-

h

J:~Q:~- --,"

; red :

:;f~!-*-i : -:~~~==~~

L-L-L-' J ; :

l-~~-=-:~-::'~ 0,4 mm2

BACK VIEW RFT9729

---

BACK VIEW RFT9729

~~

CN2

BACK VIEW

CN2

BACK VIEW

CN1

NOTES 1. CN1 IS USED FOR SENSOR CONNECTION, ONLY ON ROW "d" SEE IOM

CN2 IS USED FOR OUTPUT CONNECTION, ONLY ON ROW "b" SEE I.OM

2. FOR SUPPLY VOLTAGE CONNECTION 3 POSSIBILITIES

a AC VOLTAGE DIRECTLY TO 3-POLE CONNECTOR OF AFT

b AC VOLTAGE TO CN2 "P" TO 6z OR 2d

"N" TO 2b

"+"TO2zOR4zOR4bOR4d

AFT MUST BE WIRED AS .

c DC VOLTAGE TO CN2 "+" TO 6z OR 2d

"-,, TO 2b

NOTES 1, CNI IS USED FOR SENSOR CONNECTION, ONLY ON ROW "d" SEE IOM

CN2 IS USED FOR OUTPUT CONNECTION, ONLY ON ROW "b" SEE IOM

2, FOR SUPPLY VOLTAGE CONNECTION 3 POSSIBILITIES

a AC VOLTAGE DIRECTLY TO 3-POLE CONNECTOR OF RFT

b AC VOLTAGE TO CN2 "P" TO 6z

"N" TO 2b

" " " TO 2z OR 4z OR 4b

RFT MUST BE WIRED AS '.

C DC VOLTAGE TO CN2 " + " TO 6z

"-" TO 2b

Table 2

RFT9729 to OMS Wiring

RFT91729

Terminal #

Signal

Description

DMS

Terminal #

18b to

2Ob to

22b to

18b to

7 and 10

8

9

None

Signal Ground

Temperature

Period

Ground shield

2.5.5 RS-485 Wiring

To connect the RFT9729 to an RS-485 network, use terminal 10b as the "A" line and

terminal12b as the "8" line. RS-485 wiring should not exceed 4000 feet (1200 meters) of

twisted pair cable. Cable should consist of 24 gauge or larger diameter wire. Twisted pair,

shielded cabl~ should be used if the cable passes through any area which might produce

electromagnetic interference.

A 120 ohm, V2 watt resistor should be installed at each end of the network cable. These

termination resistors ensure proper communications by reducing electrical reflections in

the cable. See Figure 2-4, RS-485 Wiring.

As many as 15 RFT9729 units can be connected to a single network. Using the RFT9729

in a networking (multidrop) mode requires each transmitter to be assigned a unique ad-

dress in order to prevent contention on the line. In the RS-485 networking mode, it may

be desirable to engage the "485 mA Live" jumper selection (see Section 3.1, Jumper

Configuration on the Processor Board) in order to preserve active milliamp outputs on

each transmitter. For further information on the communications protocol requirements

needed to implement an RS-485 network, refer to the Remote Flow Transmitter Digital

Communications Instruction Manual, July, 1 1989, PIN 1002789, or contact Micro Mo-

tion, Inc. at 1-8001322-JUMP, in the U.S. or at 31-08385-63312 in Europe.

2.5.6 Multidrop Wiring for

the Milliamp Output

To connect the RFT9729 in a HART compatible network, the milliamp outputs from each

transmitter in the network need to be connected together feeding into a common load re-

sistor of approximately 250 ohms. Before connecting each transmitter into the network,

the transmitter must be assigned a unique multidrop address using the numbers 1

through 15. Doing this will default the milliamp output to a constant 4 mA level. The "485

mA Live" jumper (see Section 3.1) should not be engaged in this mode of operation to

limit the overall current into the common load resistor.

A maximum of 10 transmitters may be connected in a HART multidrop network. Other

Rosemount SMART FAMILY transmitters may participate in a HART compatible network.

See Figure 2-5, HART Network Wiring. A single 268 or HART compatible control system

can communicate with any of the transmitters in the network over the same two wire pair.

16

SCREW TERMINAL

y~~~~ ---", earth

~ , !~~---;. p

ipiN!..: : -:-~~---; N

LC~~~~~-: :,-~:;j 0.4 mm2

BACK VIEW RFT9729

~

CN2

BACK VIEW

NOTES 1. CNI IS USED FOR SENSOR CONNECTION, ONLY ON ROW "d" SEE I.OM

CN2 IS USED FOR OUTPUT CONNECTION, ONLY ON ROW "b" SEE I.OM

2, FOR SUPPLY VOLTAGE CONNECTION 3 POSSIBILITIES

a AC VOLTAGE DIRECTLY TO 3-POLE CONNECTOR OF RFT

b AC VOLTAGE TO CN2 "P" TO 6z OR 2d

"N" TO 2b

" + " TO 2z OR 4z OR 4b OR 4d

RFT MUST BE WIRED AS .

c DC VOLTAGE TO CN2 "+" TO 6z OR 2d

"-" TO 2b

NOTES 1" CN1 IS USED FOR SENSOR CONNECTION" ONLY ON ROW ""d"" SEE IOM

CN2 IS USED FOR OUTPUT CONNECTION, ONLY ON ROW "b" SEE IOM

2" FOR SUPPLY VOLTAGE CONNECTION 3 POSSIBILITIES

a AC VOLTAGE DIRECTLY TO 3-POLE CONNECTOR OF RFT

b AC VOLTAGE TO CN2 ""P"" TO 6z

"N"" TO 2b

" b " TO 2z OR 4z OR 4b

RFT MUST BE WIRED AS -.

c DC VOLTAGE TO CN2 "+" TO 6z

"-" TO 2b

Table 2

RFT9729 to DMS Wiring

RFT9729

Terminal #

Signal

Description

OMS

Terminal #

18b to

2Ob to

22b to

18b to

7 and 10

8

9

None

Signal Ground

Temperature

Period

Ground shield

2.5.5 RS.485 Wiring

To connect the RFT9729 to an RS-485 network, use terminal 10b as the "A" line and

terminal12b as the "8" line. RS-485 wiring should not exceed 4000 feet (1200 meters) of

twisted pair cable. Cable should consist of 24 gauge or larger diameter wire. Twisted pair,

shielded cabl~ should be used if the cable passes through any area which might produce

electromagnetic interference.

A 120 ohm, 112 watt resistor should be installed at each end of the network cable. These