MI 019-121 Instruction

February 1997

I/A Series® Mass Flowmeter CFT10 Mass Flow Transmitter Installation and Maintenance

PANEL MOUNTED TRANSMITTER FIELD MOUNTED TRANSMITTER

(DIVISION 1 EXPLOSIONPROOF ENCLOSURE NOT SHOWN)

File Name: Foxboro_Transmitter_CFT_instr_D297

MI 019-121 – February 1997

Contents Figures............................................................................................................................... v Tables.............................................................................................................................. vii 1. Introduction ................................................................................................................ 1 General Description ............................................................................................................ 1 Standard Specifications ....................................................................................................... 1 Transmitter Identification ................................................................................................... 9 Reference Documents ......................................................................................................... 9 2. Installation ................................................................................................................

11

Panel-Mounted Transmitter .............................................................................................. 11 Pipe Mounting of Field-Mounted Transmitter ................................................................. 12 Surface Mounting of Field-Mounted Transmitter ............................................................. 12 Flush Mounting of Field Mounting Transmitter ............................................................... 13 Surface Mounting of Division 1 Transmitter .................................................................... 13 Wiring .............................................................................................................................. 14 Pulse Output ..................................................................................................................... 17 Alarm Outputs – Internally and Externally Powered ......................................................... 19 Internally Powered Alarm Outputs ............................................................................... 19 Externally Powered Alarm Outputs .............................................................................. 20 3. Maintenance..............................................................................................................

23

General ............................................................................................................................. 23 Touch Panel and/or Display PWA Replacement ............................................................... 23 Replacement of Touch Panel and/or Display PWA in Panel-Mounted Transmitter .......... 23 Replacement of Touch Panel and/or Display PWA in Field-Mounted Transmitter ........... 24 Terminal PWA Evaluation ................................................................................................ 26 Sensor Imbalance (2BD), Sensor Stalled (2BC) ................................................................. 26 RTD Res Low (320), RTD Res High (321) ...................................................................... 28 Index .............................................................................................................................. 29

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Contents

Figures 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

19 20 21 22 23

CNN Loop Diagram .................................................................................................... FNN Loop Diagram .................................................................................................... FDS Loop Diagram ..................................................................................................... FNS Loop Diagram ..................................................................................................... Transmitter Identification Data Label and Location ..................................................... Panel Mounting Detail ................................................................................................. Pipe Mounting Details ................................................................................................. Surface Mounting Details ............................................................................................ Flush Mounting Details ............................................................................................... Surface Mounting of Division 1 Transmitter ............................................................... Panel-Mounted Transmitter Wiring Connections ........................................................ Field-Mounted Transmitter Wiring Connections ........................................................ Division 1 Flowtube Signal Wiring .............................................................................. I/A Series Communication, Fieldbus Connections to Transmitter(s) .......................... Connections for Externally Powered Pulse Output ....................................................... Connections for Internally Powered Pulse Output ....................................................... Connections for Internally Powered Pulse Output ....................................................... Use of Jumpers on Internally Powered Alarms to Cause Both Alarm 1 and Alarm 2 to Trigger when the Alarm Limit Assigned to Either Alarm Is Surpassed (Wired “OR” Configuration) ......................................................... Use of Resistors to Cause Alarm 1 and Alarm 2 to Operate Independently .................. Connections for Externally Powered Alarms ................................................................. Removal of Touch Panel and/or Display PWA from Panel-Mounted Transmitter ....... Removal of Touch Panel and/or Display PWA from Field-Mounted Transmitter ....................................................................... Resistance between Flowtube Wires Connected to Terminals 1, 2, 3, and 4 .................

4 5 5 6 9 11 12 12 13 13 15 16 17 17 18 18 19

20 21 21 24 25 28

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MI 019-121 – February 1997

vi

Figures

Tables 1 2 3

4 5 6 7

Specifications ............................................................................................................... Transmitter Electrical Safety Specifications .................................................................. Maximum Entity Parameters for Transmitters Certified FDS, FNS, FNN, and ANS for Class I, Division 2, Groups C and D (FNS, FNN) or Group IIB, Zone 2 (ANS) .............................................................................................................. Circuit Requirements for Transmitters Certified EGB, EDB, and ENB, when Connected to Intrinsically Safe Flowtubes Certified EBB ................................... Reference Documents .................................................................................................. Alarm Messages Applicable to Terminal PWA Evaluation ............................................ Flowtube Coil Resistances ............................................................................................

1 3

7 8 9 26 27

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Tables

1. Introduction General Description The CFT10 Mass Flow Transmitter is an instrument that can be mounted to a panel, or field mounted to a surface or DN 50 (2 in) pipe. It uses the signals received from the CFS10/CFS20 Mass Flowtube to provide the user with a direct display reading and a current or frequency transmission signal directly proportional to process fluid mass flow, density, temperature, percent solids, or volume flow. The CFT10 Transmitter also provides communication from a remote location by connection of a Hand-Held Terminal (HHT) to the transmitter or by connection of the transmitter to the I/A Series System Fieldbus or PC10 Configurator. The Transmitter provides a drive signal to the Flowtube electromagnetic drivers. A measurement signal is then received by the transmitter from the flowtube sensors. This sensor signal is processed by the transmitter to provide the mass flow through the flowtube. Since a change in process fluid density causes the natural driving frequency to change, process fluid density can also be measured. The transmitter also receives a Resistance Temperature Detector (RTD) signal from the flowtube that is proportional to process fluid temperature. Volume flow readings are derived from the mass flow and density measurements. Percent solids readings are derived from the mass flow, density, and RTD temperature measurements. The transmitter performs all required calculations relating to the determination of mass flow, density, temperature, percent solids, and volume flow, and provides scaled outputs for direct display in the appropriate measurement units. The transmitter also provides a continually updated total of mass flow from any starting point in time selected by the user. In parallel with the display of measurement, both a current output (0 to 20 mA or 4 to 20 mA), and a frequency output (0 to 10 kHz), proportional to mass or volumetric flow, density, temperature, or % solids are continually transmitted. Additionally, two alarms are provided to alert the user to an out-of-range measurement or system failure.

Standard Specifications Table 1. Specifications Item

Specification

Accuracy — Flow Rate

±0.15% of reading, or ±0.015% of nominal flow range, whichever is greater. NOTE: Stated flow accuracy includes the combined effects of linearity, hysteresis, repeatability, and zero offset.

Accuracy — Density (Includes Flowtube)

±0.25% of reading for specific gravities between 0.5 and 2.5. And ±0.5% of reading for specific gravities from 0.2 and 0.5, and 2.5 and 3.0.

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1. Introduction

Table 1. Specifications (Continued) Item Accuracy — Temperature (Includes Flowtube)

Specification ±1° C (±1.8 °F) for process fluid temperatures between -60 and +100 °C (-76 and +212 °F). Or ±3 °C (±5.4 °F) for process fluid temperatures from -130 to -60 °C (-202 to -76 °F), and from 100 to 180 °C (212 to 356 °F).

Ambient Temperature Limits: Panel-Mounted Field-Mounted

5 and 50°C (41 and 122 °F) -25 and +60°C (-13 and +140 °F)

Relative Humidity Limits

0 and 100%

Supply Voltage

ac or dc as selected when ordered. 120 or 240 V ac +10%, -22%, 50/60 Hz; 24 to 50 V dc.

Power Requirements

15 W (Includes Flowtube)

Current Output

0 to 20 mA dc or 4 to 20 mA dc. Maximum allowable load, 850 Ω.

Pulse Output Proportional to Measurement: As a Total:

11 ±2 V pk to pk. 0 Hz to 10 kHz. (Low cutoff 10 Hz). Maximum Pulse Generation Rate 10 Hz (Style AC). Maximum Pulse Generation Rates 5, 10, and 15 Hz for Style AD.

Used as a solid-state switch

Isolation, 500 V, Maximum Applied Voltage 60 V dc, Maximum Off State Leakage 0.5 mA, Maximum Load Current 500 mA, Shorted Load Duration, Continuous.

Used as a Switched Voltage Source Open Circuit Output Voltage 11 ±2 V pk to pk, Short Circuit Output Current 10 mA, Shorted Output Duration, Continuous. Alarm Output Internally Powered

Externally Powered

Approximate Mass Panel-Mounted Field-Mounted Field-Mounted (Division 1) Electrical Classification

2

When jumpers are used: Open Circuit Voltage 12 V dc, Short Circuit Current 10 mA dc. Maximum applied voltage 60 V dc, maximum off state leakage 0.5 mA, maximum load current 500 mA, indefinite shorted load duration, maximum pull-up current 10 mA, 500 V isolation. 3.5 kg (7.5 lb). 6 kg (13 lb). 96.7 Kg (43.9 lb). Refer to Table 2 for transmitter Electrical Classification. Refer to MI 019-120 for flowtube electrical classification.

1. Introduction

MI 019-121 – February 1997

Table 2. Transmitter Electrical Safety Specifications Testing Laboratory, Types of Protection, and Area Classification

Application Conditions

CENELEC flameproof for Gas Groups IIB, For Transmitter Mounting Code “X” only. Zone 1, intrinsically safe connections [EEx ib] for Intrinsically safe flowtube circuits must conGas Group IIB, Zone 1. nect to Foxboro CFS..-....EBB flowtubes. Circuits to the flowtube must operate within the maximum entity parameters provided in Table 3. CENELEC for use in general purpose (ordinary) Intrinsically safe flowtube circuits must conlocations and also as associated apparatus having nect to Foxboro CFS..-....EBB flowtubes. Cirflowtube circuits intrinsically safe EEx ib for IIB, cuits to the flowtube must operate within the maximum entity parameters provided in Zone 1. Table 3. CENELEC as associated apparatus having flowInstallation of the transmitter must be such tube circuits intrinsically safe EEX ib for IIB, that there is a low risk of mechanical damage. Intrinsically safe flowtube circuits must conZone 1. nect to Foxboro CFS..-....EBB flowtubes. Circuits to the flowtube must operate within DESIGNED TO MEET requirements as Ex N for Group IIC, Zone 2 (for field mounted trans- maximum entity parameters provided in Table 3. mitters "-Q" and "-S" only). CSA for use in general purpose (ordinary) locaConnection to Foxboro CFS..-....CGZ tions. flowtubes. CSA as suitable for use in, and as associated appa- Connection to Foxboro CFS..-....CNN Flowtubes. See Figure 1. ratus having flowtube circuits nonincendive for use in Class I, Division 2, Groups A, B, C, and D hazardous locations.

Electrical Design Safety Code EDB

EGB

ENB

CGZ CNN

FM explosionproof for Class I, Division 1, Groups C and D, Hazardous Locations. Intrinsically safe connections to Class I, Division 1, Groups C and D; nonincendive connection to Class I, Division 2, Groups C and D Hazardous Locations.

For Transmitter Mounting Code “X” only. Devices connected to nonincendive inputoutput circuits must operate within the maximum entity parameters provided in Table 3. Intrinsically safe flowtube circuits must connect to approved Foxboro CFS..-....FBB flowtubes. See Figure 3.

FDS

FM nonincendive for use in Class I, Division 2, Groups A, B, C, and D, and as associated apparatus having flowtube circuits nonincendive for in Class I, Division 2, Groups A, B, C, and D, and input/output circuits nonincendive for Class I, Division 2, Groups C and D hazardous locations.

Connection to Foxboro CFS..-....FNN Flowtubes. Devices connected to nonincendive input/output circuits must operate within the maximum entity parameters provided in Table 3. See Figure 2.

FNN

FM nonincendive for use in Class I, Division 2, Groups C and D; and as associated apparatus having flowtube circuits intrinsically safe for Class I, Division 1, Groups C and D, and input/output circuits nonincendive for Class I, Division 2, Groups C and D.

Devices connected to nonincendive input/output circuits must operate within the maximum entity parameters provided in Table 3. Intrinsically safe flowtube circuits must connect to approved Foxboro CFS..-....FBB flowtubes. See Figure 4.

FNS

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MI 019-121 – February 1997

1. Introduction

Table 2. Transmitter Electrical Safety Specifications (Continued) Testing Laboratory, Types of Protection, and Area Classification

Application Conditions

Electrical Design Safety Code

SAA flameproof, Ex d for Gas Group IIB, Zone 1. Intrinsically safe connections [Ex ib] for Gas Group IIB, Zone 1; nonsparking connections for Gas Group IIB, Zone 2.

For Transmitter Mounting Code “X” only. Devices connected to nonsparking input/output circuits must operate within the maximum entity parameters provided in Table 3. Intrinsically safe flowtube circuits must connect to certified CFS..-....ABB Flowtubes. SAA nonsparking Ex n for Group IIB, Zone 2 Devices connected to nonsparking input/outexplosive atmospheres, and ad associated electrical put circuits must operate within the maximum equipment [Ex ib] for Group IIB, Zone 1, explo- entity parameters provided in Table 3. Intrinsive atmospheres. sically safe flowtubes circuits must connect to certified CFS..-....ABB flowtubes.

ADS

ANS

NOTES: 1. These transmitters have been designed to meet the electrical safety descriptions listed in the table above. For detailed information, or status of testing laboratory approvals/certifications, contact Foxboro. 2. Temperature Codes: T6 @ 40 °C, T5 @ Max. Ambient. For ambient temperature limits, see “Standard Specifications” on page 1.

Class I, Div. 2, Groups A, B, C, D Hazardous Locations

Non-Hazardous Locations ALARM, FREQUENCY, 4 - 20 mA, AND HHT CIRCUITS

CONDUIT OR OTHER CODE APPROVED DIV. 2 WIRING METHOD CUSTOMER-SUPPLIED POWER: 100 - 120 V ac 220 - 240 V ac 24 - 42 V dc

TRANSMITTER CFT10

NONINCENDIVE FLOWTUBE CKTS -RTD -DRIVERS -SENSORS

FLOWTUBE CFS10 OR CFS20

Figure 1. CNN Loop Diagram

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1. Introduction

MI 019-121 – February 1997

Class I, Div. 2, Groups A, B, C, D Hazardous Locations

Non-Hazardous Locations

CONDUIT OR OTHER CODE APPROVED DIV. 2 WIRING METHOD

CFT10

CUSTOMER-SUPPLIED POWER: 100 - 120 V ac 220 - 240 V ac

TRANSMITTER GROUPS C AND D ONLY NONINCENDIVE

24 - 50 V dc

CIRCUITS FOR CLASS 1, DIV 2 ONLY -ALARMS -CURRENT -FREQUENCY -I/A PIO

NONINCENDIVE FLOWTUBE

FLOWTUBE

CIRCUITS

CFS10 OR

-HHT

CFS20

-RTD -DRIVERS -SENSORS

Figure 2. FNN Loop Diagram

Class I, Div. 2, Groups C and D Hazardous Locations

Non-Hazardous Locations CUSTOMER-SUPPLIED POWER:

See Figure 12, TB2 for connections.

100 - 120 V ac 220 - 240 V ac 24 - 50 V dc

NONINCENDIVE I/O CIRCUITS

EXPLOSIONPROOF CONDUIT OR OTHER CODE-APPROVED

CFT10

WIRING METHOD EXPLOSIONPROOF TRANS-MITTER

FLOWTUBE INTRINSICALLY SAFE FLOWTUBE CIRCUITS

CFS10 OR CFS20

(See Figure 12, TB3 for connections.)

Class I, Div. 1, Groups C and D Hazardous Locations Figure 3. FDS Loop Diagram

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MI 019-121 – February 1997

1. Introduction

Class I, Div. 2, Groups C and D Hazardous Locations

Non-Hazardous Locations

CONDUIT OR OTHER CODE ACCEPTED DIV. 2 WIRING METHOD

CFT10

NONINCENDIVE CIRCUITS -ALARMS -CURRENTS -FREQUENCY -RS-485 -HHT

CUSTOMER-SUPPLIED POWER: 100 - 120 V ac 220 - 240 V ac 24 - 50 V dc P.E.

Class I, Div. 1, Groups C and D Hazardous Locations CFS10 OR CFS20

INTRINSICALLY SAFE FLOWTUBE CIRCUITS -RTD -DRIVERS -SENSORS

Figure 4. FNS Loop Diagram

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1. Introduction

MI 019-121 – February 1997

Table 3. Maximum Entity Parameters for Transmitters Certified FDS, FNS, FNN, and ANS for Class I, Division 2, Groups C and D (FNS, FNN) or Group IIB, Zone 2 (ANS) Maximum Entity Parameters (a) Input/Output Circuit 0 to 20 mA dc or 4 to 20 mA dc I/A Series Fieldbus

Model HHT HandHeld Terminal Internally Powered Alarm Internally Powered 0 to 10 kHz Pulse

Input/Output Circuit Externally Powered Alarm Externally Powered 0 to 10 kHz Pulse

(a) Voc Isc Ca La

= = = =

Voc

Isc

Ca

La

26.4 V

309 mA

0.3 µF

3 mH

Must be connected to the I/A Series Communication Network via Foxboro specified 100-ohm twinaxial cable within the following maximum entity parameters: 5.0 V 0.5 A 1000 µF 1 mH The transmitter HHT terminals must be connected to the Foxboro Model HHT Hand-Held Terminal. 13.2 V 13.2 mA 3 µF 1H 13.2 V

13.2 mA

3 µF

1H

Vmax

Imax

Ci

Li

0 µF

0H

0 µF

0H

Vmax and Imax must be below the ignition curve for Group C gases. Vmax = 13.2 V or Vmax (ext.) Imax = 13.2 mA plus Imax (ext.) Resultant Vmax and Imax must be below the ignition curve for Group C gases.

Open circuit voltage Short circuit current Capacitance which may be connected Inductance which may be connected

Vmax Imax Ci Li

= = = =

Maximum safe operating voltage Maximum safe operating current Unprotected internal capacitance Unprotected internal inductance.

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1. Introduction

Table 4. Circuit Requirements for Transmitters Certified EGB, EDB, and ENB, when Connected to Intrinsically Safe Flowtubes Certified EBB Circuits to Flowtube Flowtube Model CFS10

CFS20

Maximum Entity Parameters mm

in

Cc (µF)

Lc (mH)

3 6 15 20 25 40 50 40 80

1/8 1/4 1/2 3/4 1 1-1/2 2 1-1/2 3

1 1 1 1 1 1 1 1 1

0.5 0.5 1.0 1.0 0.2 0.3 0.3 0.2 0.3

Notes to Table 4: 1. Cc = Maximum allowed capacitance per circuit of cable (wire pairs) between transmitter and flowtube. 2. Lc = Maximum allowed inductance per circuit of cable (wire pairs) between transmitter and flowtube. 3. All other circuits may not extend into the hazardous area.

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MI 019-121 – February 1997

Transmitter Identification FIELD-MOUNTED TRANSMITTER

DATA PLATE

MODEL NUMBER STYLE

SUPPLY VOLTAGE MAXIMUM POWER CONSUMED MAX. AMBIENT

C

SUPPLY FREQUENCY

PANEL-MOUNTED TRANSMITTER

Figure 5. Transmitter Identification Data Label and Location

Reference Documents This instruction covers only the installation and maintenance of the CFT10 Mass Flow Transmitter. Refer to the list below for other supporting documents. Table 5. Reference Documents Document Number DP 019-180 DP 019-181 DP 019-360 DP 019-361 DP 019-364 MI 019-120 MI 019-122 MI 019-123 MI 020-350 MI 020-479 PL 008-700 PL 008-701 PL 008-702 PL 008-703

Document Description CFS10 Flowtube Dimensions CFS20 Flowtube Dimensions CFT10 Panel-Mounted Transmitter Dimensions CFT10 Field-Mounted Transmitter Dimensions CFT10 Division 1, Explosionproof Enclosure Dimensions CFS10/CFS20 Flowtube Installation and Maintenance CFT10 Transmitter Configuration and Operation CFT10 Transmitter Configuration and Operation Using HHT Wiring Guidelines for Foxboro Intelligent Transmitters PC10 Intelligent Transmitter Configurator CFT10 Panel-Mounted Transmitter Parts List CFT10 Field-Mounted Transmitter Parts List CFS10 Flowtube Parts List CFS20 Flowtube Parts List

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1. Introduction

2. Installation Panel-Mounted Transmitter If rear of transmitter will be inaccessible after mounting, connect wiring to rear of transmitter before proceeding. Refer to “Wiring” procedure and Figure 11. 1. Refer to Figure 6. Cut out panel to dimensions shown. Refer to DP 019-360.

188 mm 7.4 in

TRANSMITTER SLOTS

TRIM BEZEL

138 mm 5.4 in

PANEL CUTOUT

CLAMPS (4) CLAMPING EDGE

CLAMP SCREWS (4)

PANEL ASSEMBLY SCREWS (4)

Figure 6. Panel Mounting Detail 2. For adjustment of clamps used to secure transmitter to panel, trim bezels must be removed from transmitter front panel. Adjustment of clamps is made through the four non-threaded holes used to secure the trim bezels. Refer to Figure 6. Insert screwdriver (or other suitable tool) into slot near top of bezel and pry out. Then pry out bottom of bezel in same manner. Repeat for other bezel. 3. Insert transmitter into panel. Position transmitter so that panel is between clamping edge of transmitter (Figure 6) and clamps. Turn clamp screws clockwise to clamp transmitter to panel. 4. Reinsert trim bezels into transmitter front panel. NOTE: Prior to being placed into service, the transmitter MUST be programmed with the required configuration information, including flowtube parameters, as read from the flowtube label. For the correct procedures, refer to MI 019-122 and MI 019-123, Configuration and Operation using Integral Keypad, and Model HHT Hand-Held Terminal, respectively.

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2. Installation

Pipe Mounting of Field-Mounted Transmitter Mounting of pipe-mounted transmitter is shown in Figure 7. Securely fasten mounting bracket on a DN 50 or 2 in pipe, as shown.

DN 50 OR 2 IN PIPE (SUPPLIED BY USER)

MOUNTING BRACKET

Figure 7. Pipe Mounting Details

Surface Mounting of Field-Mounted Transmitter Mounting of surface-mounted transmitter is shown in Figure 8. Attach brackets to surface with 4.8 mm (0.19 in) OD screws (supplied by user).

241 mm 9.5 in

130.96 mm 5.156 in 121 mm 4.75 in 83 mm 3.25 in

41 mm 1.62 in MOUNTING BRACKET, TWO HOLES PER BRACKET, 5 mm (0.2 in) DIAMETER

Figure 8. Surface Mounting Details

12

PANEL

MOUNTING BRACKET

2. Installation

MI 019-121 – February 1997

Flush Mounting of Field Mounting Transmitter Flush mounting of a field mounted transmitter on a panel is shown in Figure 9. FLUSH MOUNTING 42.88 mm 1.593 in

PANEL CUTOUT

101.60 mm 4.000 in

228.60 mm 9.000 in PANEL

MOUNTING BRACKET

6.35 mm (0.250 in) MAXIMUM RADIUS

285.75 mm 11.250 in

PANEL THICKNESS 15.88 mm (0.625 in) MAXIMUM

Figure 9. Flush Mounting Details

Surface Mounting of Division 1 Transmitter Mounting of surface-mounted Division 1 transmitter is shown in Figure 10. 330 mm 13 in.

165 mm 6.5 in.

NOTE: RECOMMENDED MOUNTING IS WITH FOUR 127 mm (0.5 in) O.D. BOLTS.

Figure 10. Surface Mounting of Division 1 Transmitter

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2. Installation

Wiring CAUTION: The wiring and installation of the CFT10 Mass Flow Transmitter must conform to local code requirements. Refer to Figure 11 for panel-mounted transmitter connections, and Figure 12 for field-mounted transmitter connections. 1. All wires enter through bottom of transmitter. For panel-mounted transmitter, remove four screws from rear cover and remove rear cover from transmitter. For field-mounted transmitter, open front door of transmitter. 2. Bring cable from flowtube to transmitter and make wiring connections to TB3 as shown in Figure 11 or Figure 12. Colors shown are wire insulation colors. All wires are numbered #1 through #12 and should be connected to TB3 terminals 1 through 12, respectively. Note that Terminal 7 is used for connection of both the #7 sensor wire and the cable shield. 3. Connect user’s external circuits to TB2 current output (I+ and I-) as required. Refer to Figure 11 or Figure 12. 4. Connect user’s external circuits to TB2 pulse output (P+ and P-) as shown in Figure 11 or Figure 12. Refer to “Pulse Output” section. 5. Refer to “Alarm Outputs” section and connect user's external alarm circuits to TB2 alarm terminals and position jumpers or resistors as required. 6. Make Fieldbus cable connections from I/A Series system to transmitter(s) as required. Refer to Figure 11 or Figure 12, and Figure 14. If transmitter is last on communication serial line, place 120 Ω, 1/4 W resistor between terminals F+ and F– of each channel. NOTE: See I/A Series System Equipment Installation Guide for Mass Flowmeter Interface cabling configurations. 7. The HHT is connected across the current output terminals (I+ and I–) at any convenient point on the transmission line. A minimum current loop resistance of 200 Ω is required to avoid excessive attenuation of HHT signals. 8. With power off, bring power wires, ac or dc, to power connection terminals shown in Figure 11 or Figure 12. Proceed as follows: For ac Power: Connect the hot lead (black or brown) to L, the neutral lead (white or light blue) to N, and the safety earth (ground) lead (green or green/yellow) to G. For dc Power: Connect high side (+) to L. Connect low side (–) to N. Connect earth to the G terminal.

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MI 019-121 – February 1997

9. The connection to the potential equalizing ground terminal is determined by whether or not the transmitter is connected to a flowtube certified intrinsically safe. (Refer to model number on data label.) If Transmitter is Connected to an Intrinsically Safe Flowtube: When Electrical Certification Code ADS, ANS, EGB, ENB, EDB, FDS, or FNS is selected, make connection in accordance with “WARNING” statement below. WARNING: Connect the potential equalizing ground terminal on the transmitter (Figure 11 or Figure 12) to the local building signal ground reference point with a dedicated wire meeting all local code requirements. This wire must be No. 12 AWG or larger and the total resistance of the ground path must not exceed one ohm. The intrinsic safety of the flowtube and its interconnecting wiring is dependent on making this connection.

IF HHT IS CONNECTED, A MINIMUM RESISTANCE OF 200 Ω IS REQUIRED IN THE USER’S CURRENT OUTPUT LOOP.

ADD JUMPERS OR RESISTORS FOR INTERNALLY POWERED ALARMS ONLY.

TERMINAL WIRE ENTRY (TYPICAL)

ALM, 1 ALM, 2 (A1 TO AP) (A2 TO AP)

POWER FUSE

1 2 3 4 5 6 7 8 9 10 11 12

BLK (1) BLU (2) BLK (3) GRN (4) RED BLK

RTD

(5) (6)

CORIOLIS SENSOR B

HHT

CURRENT I – I+ OUTPUT

A– A2(+) A1(+) BLK, SHLD (7) CORIOLIS AP SENSOR A (8) PULSE P– YEL OUTPUT P+ BLK S(SHLD) (9) FIELDBUS A BRN F– (10) DRIVER 2 TERMINATIONS F+ S(SHLD) BLK FIELDBUS B (11) F– WHT TERMINATIONS F+ (12) DRIVER 1 ALARMS 1 AND 2

TB3

NOT USED

L

N

G

TB2 ac OR dc POWER

POTENTIAL EQUALIZING GROUND TERMINAL. CONNECTION REQUIRED WHEN FLOWTUBE CERTIFIED INTRINSICALLY SAFE.

Figure 11. Panel-Mounted Transmitter Wiring Connections

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2. Installation

ADD JUMPERS OR RESISTORS FOR INTERNALLY POWERED ALARMS ONLY. ALM.1 (A1 TO AP)

TERMINAL WIRE ENTRY (TYPICAL)

ALM.2 (A2 TO AP)

TB2 FREQUENCY OUTPUT ALARMS 1 AND 2 12 11

10 9

8 7

6

5

4 3 2 1

S(SHLD) P+ FPF+ AP A1(+) S(SHLD) FAF+ A2(+) NOT USED II+

FIELDBUS B TERMINATION FIELDBUS A TERMINATION CURRENT OUTPUT

GRN BLK BLU BLK RTD

(4) (3) (2) (1)

(6) BLK (5) RED CORIOLIS SENSOR B

(8) YEL (7) BLK SHLD SENSOR A

CORIOLIS

(10) BRN (9) BLK DRIVER 2

DRIVER 1

(12) WHT (11) BLK

HHT

POWER FUSE

L

N

G

IF HHT IS CONNECTED, A MINIMUM RESISTANCE OF 200 Ω IS REQUIRED IN THE USER’S CURRENT OUTPUT LOOP.

ac OR dc POWER POTENTIAL EQUALIZING GROUND TERMINAL CONNECTION REQUIRED WHEN FLOWTUBE CERTIFIED INTRINSICALLY SAFE.

Figure 12. Field-Mounted Transmitter Wiring Connections

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MI 019-121 – February 1997

2 1 BLU BLK

4 3

FLOWTUBE SIGNAL TERMINAL BLOCK

RTD

2 1

GRN BLK 4 3

6 5 BLK 6 5 RED CORIOLIS SENSOR B

8 7 YEL 8 7 BLK, SHLD

BRN BLK 10 9 DRIVER 2

DRIVER 1

CORIOLIS SENSOR A

10 9

11

12 WHT BLK 11

12

JUNCTION BOX ASSEMBLY

ENTRANCE HOLE ACCEPTS 3/4-IN CONDUIT FITTING

NOTE: SEE FIGURE 11 FOR ADDITIONAL CONNECTIONS.

Figure 13. Division 1 Flowtube Signal Wiring

TERMINATE EACH FIELDBUS WITH 120 OHM, 1/4 W RESISTOR

F+

F–

S

FIELDBUS A TERMINATIONS

F–

F1

S

FIELDBUS B TERMINATIONS

TRANSMITTER #N

+

+

–

–

SHLD

SHLD

+

+

–

–

SHLD

SHLD

F+

F–

S

FIELDBUS A TERMINATIONS

F–

F1

FIELDBUS A

FIELDBUS B

S

FIELDBUS B TERMINATIONS

TRANSMITTER #1

Figure 14. I/A Series Communication, Fieldbus Connections to Transmitter(s)

Pulse Output The pulse output (P+ and P-) may be used for any one of the following: ♦

To provide a continuous pulse output of frequency proportional to measurement. The minimum frequency is 10 Hz. The maximum frequency is 10 KHz.

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2. Installation

♦

To totalize by generating a pulse output each time the amount of mass having passed through the flowtube reaches a value pre-assigned by the user (pulse trip level). For Style AC transmitters, the maximum pulse output generation rate when totalizing is 10 Hz. For Style AD transmitters, the maximum pulse output rate when totalizing is configurable to 5, 10, or 15 Hz. If these rates are exceeded, a “Pulse Overrun” alarm occurs. Refer to “Standard Specifications” on page 1 for using pulse output as a solid state switch. See Figure 15, Figure 16, and Figure 17. DIODE REQUIRED FOR EXTERNAL POWER SUPPLY