HF200 HART Filter Instruction Manual

HF200 Series March 2001 Errata Sheet for

If the Voltage Available is insufficient, then adjust the switches on the filter. However, make sure the control system compliance voltage is adequate to supply the calculated voltage drops. See also the procedure under Installed Adjustment.

3. File this errata with the instruction manual.

1

ON

2

3

4

FIELDVUE R HF200 Series HARTR Filters Instruction Manual, Form 5380, February 1996

15 VOLTS DC COMPLIANCE VOLTAGE

W6522/IL

Figure 1. Filter Switch Settings as Shipped from the Factory

Filters are now shipped from the factory adjusted for a control system compliance voltage of 15 volts. Make the following changes to the filter instruction manual.

1. On page 5, add the following note next to figure 6: “See figure 1 in errata dated April 2001.”

2. On page 5, replace the first paragraph under the heading Filter Adjustment with the following: The filters are factory adjusted for a control system compliance voltage of 15 volts at 22 mA. If the system compliance voltage is not known, perform the procedure described under Bench Adjustment. If the control system compliance voltage is greater than 15 volts and the Voltage Available at the instrument terminals is greater than 12 volts dc, the filter does not need to be readjusted. Use the guidelines given in the “Installation” section of the FIELDVUE DVC5000 Series Digital Valve Controllers Instruction Manual Form 5335 to calculate the Voltage Available at the digital valve controller.

EFisher Controls International, Inc. 2001; All Rights Reserved FIELDVUE, Fisher and Fisher-Rosemount are marks owned by Fisher Controls International, Inc. or Fisher-Rosemount Systems, Inc. HART is a mark owned by the HART Communications Foundation.

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. We reserve the right to modify or improve the designs or specifications of such products at any time without notice.

For information, contact Fisher: Marshalltown, Iowa 50158 USA Cernay 68700 France Sao Paulo 05424 Brazil Singapore 128461 Printed in U.S.A.

Instruction Manual Form 5380 February 1996

HF200 Series

FIELDVUE HF200 Series HART Filters Scope of Manual This instruction manual includes installation and maintenance information for the FIELDVUE HF200 Series HART filters. Refer to separate manuals for additional information on other FIELDVUE products used with the HART filters, such as the Type DT4000 digital transducer, DVC5000 Series digital valve controllers, and the Type 2530H1 HART interchange multiplexer.

Control system refers to a distributed control system (DCS), programmable logic controller (PLC), or a stand-alone controller that provides a control signal to the FIELDVUE instrument.

Only personnel qualified through training or experience should install, adjust, and maintain the HF200 Series HART filters. If you have any questions concerning these instructions contact your Fisher Controls sales office or sales representative before proceeding.

Description The HF200 Series HART filters are used with HARTbased FIELDVUE instrumentation, such as the Type DT4000 digital transducer or the DVC5000 Series digital valve controllers. These filters are used when this instrumentation is connected to a 4 to 20 mA dc control system output that was not designed for use with the HART (Highway Addressable Remote Transducer) communication protocol.

The HF200 Series HART filters are active devices that are inserted in-line with both wires of a HART 4 to 20 mA dc output loop. The purpose of the filter is to effectively isolate the control system analog output from modulated HART communication signals. The filter receives a 4 to 20 mA dc current signal from the control system and drives the loop as a high impedance current source. The filter output current is a filtered

FIELDVUE, Fisher, Fisher-Rosemount, and Managing The Process Better are marks owned by Fisher Controls International, Inc. or Fisher-Rosemount Systems, Inc. HART is a trademark of the HART Communication Foundation All other marks are the property of their respective owners.

This product may be covered by one or more of the following patents (5,434,774 and 5,451,923 ) or under pending patents.

Fisher Controls International, Inc. 1996, All Rights Reserved

replica of the input current. The current drive stage of the filter prevents the voltage modulation in the HART loop from being seen by, or having an affect on, the control system output. The filter also prevents the control system output from interfering with the HART communication. To perform the intended function, the filter requires a small amount of operating current (40 to 60 microamps) and an input-to-output voltage drop of 2.3 volts.

The filter is normally installed near the field wiring terminals of the control system I/O. HART communication is only possible between the filter and the field instrument, not on the control system side of the filter.

The filter is not designed for or intended for use in the process environment. Neither the filter nor its outputs are approved for hazardous areas. However, a recommended intrinsic safety barrier can be connected between the FIELDVUE instrument and the filter in intrinsically safe installations.

A Type HJ200 HART junction box can be used with the HART filters. The junction box permits using a single multi-wire cable to interconnect with the Type 2530H1 HART Interchange multiplexer. The junction box provides a common collection point for individual HART communication signals and multiplexes those signals into a 37-pin D-shell connector output, which can be cabled directly to the HART Interchange multiplexer. For more information on connecting the filters to a Type 2530H1 HART interchange multiplexer, see the Type 2530H1 HART Interchange Multiplexer Instruction Manual.

The junction box is normally installed near the filters and control system output. The standard multi-wire cable allows the HART Interchange multiplexer to be located remotely from the filters and control system outputs.

Specifications Typical specifications for the HF200 Series HART filters are shown in Table 1.

D102232X012

Introduction

HF200 Series Table 1. HF200 Series HART Filter Specifications

Mounting Type HF210: directly on standard single-row screw terminal barrier strip of control system Type HF220: directly on cage clamp style barrier strip of control system Type HF230: directly on two tier (staggered) screw terminal barrier strip of control system Type HF240: Type 32 or 35 DIN rail Available as J filter or J no filter (Provides straight through connection between control system output and field wiring. Can be used as tap for HART communication) Control System Connections Type HF210 and HF220: Two 16 AWG solid wires 2 inches (50 mm) long J Normal polarity orientation (+ connection on top or to the right), or J Reverse polarity orientation (+ connection below – connection or left of the – connection), see figure 2 Type HF230: Two stamped metal fingers (spade lugs) Type HF240: 2-pin cage-clamp style connector

Type HF220: Terminal assembly with two cageclamp style connections Type HF240: 2-pin cage clamp style connector HART Communication Connections Type HF210, HF220, and HF230: One pair of 22 AWG wires, 10 feet (3 meters) long, terminated with 2-conductor plug (Weidmuller part number 152646) Type HF240: 2-pin cage-clamp style connector Power Requirements Input Current: 40 to 60 microamps drawn from the loop Input Voltage: Adjustment range of 12 to 20 volts dc at 20 mA Ambient Operating Temperature –40 to 150_F (–40 to 65_C) Ambient Relative Humidity 5 to 95% Approximate Weight

Field Instrument Connections Type HF210 and HF230: Terminal assembly with two screw-terminal style connections

Installing Type HF210 and HF220 Cage Clamp, Conventional Screw Terminal Filters

Installation Filter Installation Four types of filters are available. The Type HF210, HF220, and HF230 filters are connected in line with the existing wiring. They are held in place by the wiring to the control system output terminals, or by stamped contacts to the control system output terminals. The Type HF240 filter mounts to a DIN rail, either Type 32 or Type 35.To install the filters, refer to Figure 1.

WARNING

To avoid personal injury or property damage from an uncontrolled process, provide a temporary means of process control before taking the loop out of service.

2

Type HF210 and HF220: 3 oz. (0.1 kg) Type HF230: 4 oz. (0.1 kg) Type HF240: 5 oz. (0.1 kg)

The Type HF210 and HF220 filters mount on a control system output terminal strip that has a single row of screw terminals. These filters are available with normal or reverse polarity orientation. Figure 2 shows a Type HF210 filter with the normal polarity orientation, the input and output negative (–) connections are to the left of the positive (+) connections. The reverse polarity orientation has the connections reversed; the negative (–) connections are to the right of the positive (+) connections, rather than to the left as shown. The polarity is indicated on the filter. Be sure to use the filter with the correct polarity.

To install the filters, provide a temporary means of process control, then take the loop out of service.

Remove the field wiring from the control system 4 to 20 mA current output terminals. Connect the field wiring to the filter output terminals, taking care to maintain correct polarity. Cut and strip the solid wires on the filter input to the correct length and connect these wires to the control system 4 to 20 mA output termi-

HF200 Series RS485 NETWORK

RS232-RS485 CONVERTER

– - - UP TO 29 MORE MULTIPLEXERS

PERSONAL COMPUTER WITH VALVELINKt TYPE VL2030 SOFTWARE

2-CONDUCTOR PLUGS

TYPE 2530H1 HART INTERCHANGE MULTIPLEXERS

OUTPUT TERMINALS

37-PIN D-SHELL CONNECTOR INTERCONNECTING CABLE

TYPE HJ200 JUNCTION BOX

FIELD DEVICES

HF200 SERIES HART FILTERS

INTRINSIC SAFETY BARRIER

NOTE: INTRINSIC SAFETY BARRIERS REQUIRED FOR FILED DEVICES IN HAZARDOUS AREAS ONLY A6791 / IL

Figure 1. Typical HF200 Series HARTR Filter Installation with Type HJ200 HART Junction Box

nals, again taking care to maintain correct polarity. If the installation requires crossed wires to obtain the correct polarity, the wrong filter is being used.

To install the filters, provide a temporary means of process control, then take the loop out of service.

Installing Type HF230 Staggered Screw Terminal Filters

Remove the field wiring from the control system 4 to 20 mA current output terminals. Connect the field wiring to the filter output terminals, taking care to maintain correct polarity. Place the stamped metal fingers under the control system output terminals and fasten securely.

The Type HF230 filter mounts on a control system terminal strip with two tiers (staggered) of screw terminals.

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HF200 Series CONTROL SYSTEM CONNECTION APPLY PRESSURE TO WALLS OF MOUNTING TRACK TO REMOVE PRINTED WIRING BOARD

HART COMMUNICATION CABLE

– +

FILTER

–+

FIELD INSTRUMENT CONNECTION W6495*/IL

W6492*/IL

HART COMMUNICATION CABLE TERMINATED WITH 2-CONDUCTOR PLUG

Figure 2. Type HF210 HART Filter Showing Normal Polarity Orientation

CONTROL SYSTEM CONNECTION

HART COMMUNICATION CONNECTION

FIELD INSTRUMENT CONNECTION

Figure 4. Type HJ200 Junction Box Printed Wiring Board Removal

or snapped to a DIN Rail using the available mounting foot. Mounting holes are available on the back of the mounting track for screws, rivets, or other fasteners. In addition, the mounting track could be fastened with Velcro or some other means.

In all cases, except the DIN-foot, remove the printed wiring board from the mounting track before fastening the track to some item. Remove the printed wiring board by applying pressure to the walls of the mounting track, as shown in figure 4. After the mounting track is installed, re-install the printed wiring board in the mounting track.

Shields W6493*/IL

Figure 3. Type HF240 HART Filter (DIN Rail Mount)

Installing Type HF240 DIN Rail Mount Filters The Type HF240 filter, shown in figure 3, mounts on a type 32 or 35 DIN rail.

To install this filter, provide a temporary means of process control, then take the loop out of service.

Remove the DIN interconnect blocks from the rail without disconnecting existing wiring. Install the DIN-rail filter on the rail. Disconnect the wires from the control system output side of the interconnect blocks and connect them to the filter input connectors, taking care to maintain correct polarity. Disconnect the wires from the field side of the interconnect blocks and connect them to the filter output connectors, taking care to maintain correct polarity.

Junction Box Installation The junction box is built on Augat SnapTrack mounting track. The mounting track can be mounted to a panel,

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If using shielded wiring on both sides of the filter, the shield should connect across the filter. If the filter connects directly to the control system output and shielded loop wiring is being used, connect the shield to system ground on the instrument side of the filter.

HART Wiring Connections In all filter cases, the communications channel wires can be connected to a HART Interchange multiplexer, either directly or through a Type HJ200 junction box.

The communication channel wires also may be temporarily connected to a handheld communicator or left unconnected. The Type HF210, HF220, and HF230 filters are supplied with a pre-wired cable. The DIN-rail mount filter has a terminal block to allow for user installed wiring.

As illustrated in Figure 5, the junction box printed wiring board has two connectors (J1 and J2) for connecting the 2-conductor plugs from the individual filters.

The silk screen on the printed wiring board indicates two channel numbers for each filter connection. Channel numbers 1 through 16 designate the channel number if the interconnecting cable between the junction box and the multiplexer is connected to the 37-pin connector on the multiplexer labeled LOOPS 1-16.

HF200 Series

ÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ Table 2. Filter Switch Settings

A6792 / IL

Figure 5. Junction Box Printed Wiring Board Showing HART Communication Channel Identification

CONTROL SYSTEM COMPLIANCE VOLTAGE

1

2

3

4

20.0 19.7 19.3 19.0

off on off on

off off on on

off off off off

off off off off

18.7 18.3 18.0 17.7

off on off on

off off on on

on on on on

off off off off

17.3 17.0 16.7 16.3

off on off on

off off on on

off off off off

on on on on

16.0 15.7 15.3 15.0

off on off on

off off on on

on on on on

on on on on

SWITCH SETTING

1

ON

2

3

4

Bench Adjustment

19 VOLTS DC COMPLIANCE VOLTAGE

Set the switch on the filter to a setting that is closest to, but less than, the control system compliance voltage, as indicated in Table 2. Figure 6 shows the factory switch settings for the filter.

The control system compliance voltage is the maximum voltage the control system can provide at maximum current. If unsure of the control system compliance voltage, perform the following compliance voltage test.

1. Connect equipment as shown in Figure 7.

W6522/IL

Figure 6. Filter Switch Settings as Shipped from the Factory

Channel numbers 17 through 32 designate the channel number if the interconnecting cable between the junction box and the multiplexer is connected to the 37-pin connector on the multiplexer labeled LOOPS 17-32. The HART communications cable from the filter can be plugged into any channel connector.

A standard, straight through, 37-pin D-shell male-tomale cable connects between the junction box and the HART Interchange multiplexer. This cable is available in standard lengths up to 100 feet.

2. Set the control system to provide maximum output current.

3. Increase the resistance of the 1 kilohm potentiometer, shown in Figure 7, until the current observed on the milliammeter begins to drop quickly.

4. Record the voltage shown on the voltmeter. This is the control system compliance voltage.

Installed Adjustment After installing the filter and setting it for the proper voltage, if it appears not to be working properly, this procedure may be used to adjust the filter for proper operation with the actual control system, wiring, and instrument connected.

1. Connect the equipment as shown in Figure 8.

Filter Adjustment The filters are factory adjusted for a control system compliance voltage of 19 volts at 22 mA. If the control system compliance voltage is greater than 19 volts and the terminal voltage (available) at the instrument is 12 volts dc, minimum, the filter does not need to be readjusted. Use the guidelines given in PS Sheet 62.1:FIELDVUE(A) to calculate the terminal voltage (available).

2. Set the control system to the maximum current output.

3. Adjust the switch on the filter to obtain a voltmeter reading that is 0.5 volts below the compliance voltage of the control system. Record this reading.

4. Connect the voltmeter to the output of the filter and verify the voltage read is at least 2.3 volts below the voltage recorded in step 3. If the voltage difference is not 2.3 volts, you may have inadequate control system compliance voltage for the filter to operate properly.

5

HF200 Series

WARNING Personal injury or property damage caused by fire or explosion may occur if this test is attempted in an area which contains a potentially explosive atmosphere or has been classified as hazardous.

A6192/ IL

Figure 7. Control System Compliance Voltage Test Schematic

2-CONDUCTOR PLUG CONTROL SYSTEM FIELD WIRINGTERMINATION

–

+ HART COMMUNICATION CABLE

FILTER

+

+

–

–

VOLTMETER

A6793 / IL

6

Figure 8. Installed Adjustment Setup

TO INSTRUMENT OR INTRINSIC SAFETY BARRIER

HF200 Series Corrective Maintenance The most likely malfunction of an HF200 Series HART filter is reverse polarity installation. If the filter appears to be shorting out the loop current rather than delivering it to the instrument, check the polarity of the voltage at the inputs and outputs of the filter and at the inputs of the instrument. If the polarities are correct and there is still a problem, follow the adjustment procedure in this manual.

If a filter’s input is adjusted higher than the control system output compliance voltage, the symptom is no output from the filter. In this case, the filter requires more voltage than the control system can produce.

The control system will not be putting out the desired current and may exhibit a readback failure and generate an alarm.

If a filter’s input is adjusted too low, it will supply the proper DC current, but will not support communications in all circumstances. A low input adjustment produces a low filter output compliance voltage. Any time the load (the instrument and all other series resistance) requires more voltage to reach maximum current than the output compliance of the filter, the filter will not exhibit the required high impedance to communications and communications will fail.

Inadequate loop voltage will not support filter operation. This is an installation problem that may appear initially to be a filter malfunction. For the filter to operate properly, the control system must have a compliance voltage that is at least 2.3 volts higher than the voltage required to drive the loop to maximum current.

7

HF200 Series

For information, contact Fisher Controls: Marshalltown, Iowa 50158 USA Cernay 68700 France Sao Paulo 05424 Brazil Singapore 0512 8 Printed in U.S.A.