Romilly's HART® and Fieldbus Web Site


Where can I get a HART modem?

Copyright © Romilly Bowden 1997 - 2015.


Well, that depends on what you mean by "a HART modem" ...

You may want


HART modem integrated circuits

These are what you need to embed in a HART-speaking field device or host, if you are designing from scratch. They operate at extremely low power, so can be used within two-wire 4-to-20mA loop-powered instruments.

Symbios Logic SYM20C12 and SYM20C15

These were originally the NCR 20C12 and 20C15. The 20C15 is a newer design and includes much more and better circuitry for filtering, carrier detection and waveform shaping.

Symbios has recently been acquired by LSI Logic Corporation. Initially, LSI planned to make these devices obsolete. However, in the face of continuing demand, they now plan to keep the 20C15 in production, for at least 2 years. Supplies have been short, but more should be available from a new fabrication plant (in October 1999). Ask your local LSI sales office (see www.lsilogic.com/contacts/index.html) for latest delivery information, or call Tom Kodet at +1 (612) 921 8363.

LSI's website has no information about this product. However, a full 20C15 data sheet is available on the Analog Services website.

LSI Logic Corporation
Corporate Headquarters
1551 McCarthy Blvd.
Milpitas, CA 95035
USA
Web site: www.lsilogic.com
Telephone: +1 (408) 433 8000
Fax: +1 (408) 433 8989

American Microsystems, Inc. (AMI) A5191HRT
Now part of ON Semiconductor

A drop-in replacement for the 20C15.

Information is here.

Application notes are here and here (Acrobat PDF format).

ON Semiconductor Headquarters
5005 East McDowell Road
Phoenix, AZ 85008
USA
Telephone: +1 (602)-244-6600
Customer Inquiries: (888)-743-7826
Web site: www.onsemi.com
E-mail via the website.

ONSemi NCN5192

This HART modem includes the Digital-to-Analogue converter.

Information is here.

Application notes are here and here (Acrobat PDF format).

Smar HT2012

A clone of the NCR 20C12.

Brief data sheet is here.

Smar Equipamentos Industriais Ltda.
Av. Dr. Antonio Furlan Jr., 1028
Sertãozinho, SP
Brazil 14160-000
Web sites: www.smar.com and www.smaruk.co.uk.
E-mail: smarinfo@smar.com or info@smaruk.co.uk
Telephone: +55 16 642 3466
Fax: +55 16 642 3661

Smar HT3012

The HT2012 HART modem core, plus an LCD driver, floating point unit and 15-bit D/A converter.

Brief information is here.

Brief data sheet is here (Acrobat PDF format).

Spring Technology HT2012 and HT2015

These are produced by Springfield Research Group, a renamed (after the recent sale) SMAR Research Corporation.

See their HART semiconductor products here.

NEW UK sales and support also available from HART Expert Ltd, see www.hart-expert.co.uk/, who have an online shop here.

Spring Technology
3350 NW 22nd Ter Suite 500
Pompano Beach
FL - 33069
USA
Tel: +1 (954) 657 8849
Fax: +1 (954) 657 8895
E-mail: sales@springres.us
Web site: www.springres.com.

Schoppe & Faeser H&B 0743849

A well-specified chip from this subsidiary of Hartmann & Braun (now part of ABB.)
Schoppe & Faeser GmbH
Schillerstrasse 72
D-32425 Minden
Germany
Telephone: +49 571 830 0
Fax: +49 571 830 1846

CML FX614

A Bell 202 modem chip (may not be strictly HART-compatible).

Data sheet (Acrobat PDF format).

Consumer Microcircuits Ltd
1 Wheaton Road
Witham
Essex CM8 3TD
England
Web site: www.cmlmicro.com
E-mail: sales@cmlmicro.com
Telephone: +44 1376 513833
Fax: +44 1376 518247

SDIC SD2015

HART modem chip, said to be lower current consumption than others.

Information and data sheet (Acrobat PDF format).

Hangzhou SDIC Microelectronics Co., Ltd.
5/F, Bldg 4, Tuosen Technology Park
351 Changhe Road, Binjiang Dist, Hangzhou, Zhejiang, P.R. China 310052
Web site: www.sdicmicro.com
Telephone: +86 (571) 8667 3060,8667 3061,8667 3068
Fax: +86 (571) 8667 3072
E-mail: info@sdicmicro.com
Marketing E-mail:sales@sdicmicro.cn
Contacts also in Hong Kong and USA.

Analog Devices AD422, AD424, AD434

These devices have been withdrawn.
Analog Devices, Inc.
3 Technology Way
Norwood, MA 02062
USA
Web site: www.analog.com
Telephone: +1 781 329 4700
Regional Offices, Sales Offices and Distributors.

Analog Devices AD5700/AD5700-1

HART modem chips, with very low power consumption. The -1 version includes a high-precision oscillator.

Information, circuit note and data sheet (Acrobat PDF format).

Maxim DS8500

HART modem chip, with very low power consumption. Needs only a few external components.

Information and data sheet (Acrobat PDF format).

Maxim Integrated Products, Inc.
160 Rio Robles
San Jose, CA 95134
USA
Telephone: +1 408 601 1000
Web site: www.maxim-ic.com
E-mail: sales@maxim-ic.com

Texas Instruments TCM3105 and AMD AM7910

These are now obsolete. They were general-purpose communication modems operating with Bell 202, but not specifically-designed for HART. Their power consumption was too high to be used in a two-wire loop-powered field instrument.
 
 

RS-232 to HART converters

These provide a convenient interface for HART host devices which already have a conventional RS-232 serial port (such as a PC). Typically, the converter has a 9- or 25-pin D type connector for the RS-232 side, and some form of terminals for the HART side. Usually, power for the converter can be taken automatically from the host's RS-232 port.

Hosts having only an RS-422 or RS-485 port will need an additional converter to RS-232. (Unfortunately, no direct converter sems to be available from these signals to HART.) Note the requirement to generate an RTS signal at the RS-232 interface (see below).

Because HART is a half-duplex protocol, the HART transmission from the host has to be switched off to listen for a reply from the field device. The converters listed provide this function via the RS-232 RTS control line. Host software must control this line correctly for the system to work. (This is nothing new - many RS-232 to RS-485 converters work in the same way, for the same reason.)

If you need to connect to more than one HART loop, consider using a HART multiplexer, containing one or more HART modems and also switching between multiple HART networks.

Viator® 010001

This converter is now also available in an intrinsically safe [EEx ia] IIC version, model 010005.

Information, data sheets and user manuals for both these and other products here.

Buy direct from MACTek's online store.

MACTek Corporation
7380 Stoneham Road
Gates Mills, OH 44040
USA
Web site: www.mactekcorp.com
E-mail: tholmes@mactekcorp.com
Telephone: +1 (440) 423 0955
Fax: +1 (440) 423 0967

Contrans P FSK Modem II

Certified for connection to intrinsically-safe hazardous area circuits.

PDF data sheet here.

(Since 1999, Hartmann & Braun is part of ABB.)

Hartmann & Braun GmbH & Co. KG
Schoppe & Faeser
Schillerstrasse 72
D-32425 Minden
Germany
Web site: www.hub.de
Telephone: +49 571 830 0
Fax: +49 571 830 1846

Smar HI311

Information here.

A brief data sheet here.

Smar Equipamentos Industriais Ltda.
Av. Dr. Antonio Furlan Jr., 1028
Sertãozinho, SP
Brazil 14160-000
Web sites: www.smar.com and www.smaruk.co.uk.
E-mail: smarinfo@smar.com or info@smaruk.co.uk
Telephone: +55 16 642 3466
Fax: + 55 16 642 3661

Endress & Hauser COMMUBOX FXA191

Certified for connection to intrinsically-safe hazardous area circuits.

Information and documentation from here (select FXA191 in left pane).

Endress & Hauser Messtechnik GmbH & Co.
Colmarer Strasse 6
D-79576 Weil am Rhein
Germany
Web sites: www.endress.com and www.de.endress.com (German).
Telephone: +49 7621 9 7501
Fax: +49 7621 9 75 555

Microflex MicroLink 101-0005 RS-232 HART modem

Information here.

Information on all Microflex HART modems is here.
Manuals on all products are available here.
 

Microflex, LLC
35900 Royal Road
Pattison, TX 77423
USA
Web site: www.microflx.com
E-mail: sales@microflx.com
Telephone: +1 (281) 855 9639
Fax: +1 (832) 422 4391

Microflex Inlink modems 101-0015 and 101-0016

Small modules to build into your own product or development prototype. The host-side interface is logic levels, not RS-232. Two models: one non-isolated (-CC), and one with transformer isolation (-TC).
 

Ansco PRIMM

("Process Instrument Miniature Modem")

Sadly, Analog Services seems to have competely disappeared. (Does anyone know differently?)

Ansco Inc.
PO Box 24069
Minneapolis, MN 55424
USA
Telephone: +1 (612) 587 1006
Fax: +1 (612) 587 0809
 
or:
 
Analog Services, Inc.
4512 Oak Drive
Edina, MN 55424
USA
Web site: www.analogservices.com
E-mail: stevea@analogservices.com
Tel: +1 612-927-7112
Fax: +1 612-929-7503

NEW ProComSol HM-RS232-ISO

Information here.

Datasheet here and user manual here to download.

Buy direct from ProComSol's online store, or in the UK from HART-Expert Ltd, online shop here.

ProComSol, Ltd.
13001 Athens Ave
Suite 220
Lakewood, OH 44107
USA
Website: www.procomsol.com
Email: sales@procomsol.com
Telephone: +1 (216) 221 1550
Fax: +1 (216) 221 1554
 

USB to HART converters

This update to the RS-232 serial port devices above, provides an interface for HART host devices (such as a PC) using a USB port. Power for the converter can be taken automatically from the host's USB port.

A "virtual serial port" software driver makes the USB port appear to Windows programs as a conventional COM port. The notes on RS-232 applications above may also apply.

ProComSol HM-USB

Information here.

Datasheet here and user manual here to download.

Buy direct from ProComSol's online store, or in the UK from HART-Expert Ltd, online shop here.

ProComSol, Ltd.
13001 Athens Ave
Suite 220
Lakewood, OH 44107
USA
Website: www.procomsol.com
Email: sales@procomsol.com
Telephone: +1 (216) 221 1550
Fax: +1 (216) 221 1554

Smar HI321

Fully isolated from HART loop to USB.
 
Information here.

Smar Equipamentos Industriais Ltda.
Av. Dr. Antonio Furlan Jr., 1028
Sertãozinho, SP
Brazil 14160-000
Web sites: www.smar.com and www.smaruk.co.uk.
E-mail: smarinfo@smar.com or info@smaruk.co.uk
Telephone: +55 16 642 3466
Fax: + 55 16 642 3661

Viator® 010031

Information, data sheets and user manuals for this and other products here.

Buy direct from MACTek's online store.

MACTek Corporation
7380 Stoneham Road
Gates Mills, OH 44040
USA
Web site: www.mactekcorp.com
E-mail: tholmes@mactekcorp.com
Telephone: +1 (440) 423 0955
Fax: +1 (440) 423 0967

Endress & Hauser Commubox FXA195

Certified for connection to intrinsically-safe hazardous area circuits.

Information and documentation here.

Endress & Hauser Messtechnik GmbH & Co. KG
Colmarer Strasse 6
79576 Weil am Rhein
Germany.
Web sites: www.endress.com and www.de.endress.com (German).
E-mail: info@de.endress.com
Telephone: +49 (7621) 9 75 01
Fax: +49 (7621) 9 75 55 5

Ifak HART Stick

USB modem providing a virtual COM port for applications providing their own master software.

Information here.

Ifak isHRT USB

USB modem, includes optional support for FDT (Fieldbus Device Tool) device manager applications. Also available as isHRT USBEx, certified for connection to intrinsically-safe hazardous area circuits.

Information here.

ifak system GmbH
Oststraße 18
39114 Magdeburg
Germany.
Web sites: www.ifak-system.com.
and www.ifak-system.de (German)
E-mail: kontakt@ifak-system.com
Telephone: Tel.: +49 391 544 563 0
Fax: +49 391 544 563 99

 
ifak-system GmbH also supply similar products for Profibus, CAN and DeviceNet protocols.

Smart HART Modem

A two-channel HART modem including built-in HART master functionality, with fully-compliant HART timing. USB port offers 2 virtual COM ports for legacy applications, but also HART-IP (HART over ethernet) and connection to HCF's HART OPC Server. Provides two independent HART masters, multiplexed on to the same HART-IP host bus.

Information here.

Exalon Delft B.V.
Radex Innovation Centre
Rotterdamseweg 183C
2629 HD Delft
The Netherlands
Web site: www.exalondelft.nl
E-mail: info@exalondelft.nl
Telephone: +31 (15) 2682554
Fax: +31 (84) 833 7893

Microflex 101-0027 and 101-0032 USB HART modems

Information on the 101-0027 is here. The 101-0032 version is DIN-rail mounted. Information here.

Information on all Microflex HART modems is here.
Manuals on all products are available here.

Microflex, LLC
35900 Royal Road
Pattison, TX 77423
USA
Web site: www.microflx.com
E-mail: sales@microflx.com
Telephone: +1 (281) 855 9639
Fax: +1 (832) 422 4391
 

Bluetooth to HART converters

This update to the RS-232 serial port devices above, provides a wireless interface for HART host devices (such as a Pocket PC or PDA) with bluetooth connectivity, or any PC with a bluetooth adapter. No extra software is needed.

ProComSol HM-BT-BAT

Information here on this battery-powered device.

Datasheet here and user manual here to download.

Buy direct from ProComSol's online store, or in the UK from HART-Expert Ltd, online shop here.

ProComSol, Ltd.
13001 Athens Ave
Suite 220
Lakewood, OH 44107
USA
Website: www.procomsol.com
Email: sales@procomsol.com
Telephone: +1 (216) 221 1550
Fax: +1 (216) 221 1554

PC HART interface cards

These provide a combined serial port and HART modem, built as a PC card. For programming, they appear identical to a standard PC serial port. Remember, host software must use RTS to control signal direction (see above), even though it does not appear externally.

PCSMART

ISA-bus PC serial port with HART output.
Eurotech Ltd. (was Arcom Ltd.)
3 Clifton Court
Cambridge CB1 7BN
England.
Web site: www.eurotech-ltd.co.uk
Telephone: +44 1223 403410
Fax: +44 1223 410457


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