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
- An integrated circuit HART modem chip
- An RS-232 to HART converter
- A USB to HART converter
- A Bluetooth to HART converter
- A PC HART serial port
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 SYM20C15These 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
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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 NCN5192This HART modem includes the Digital-to-Analogue converter. Information is here. | |
Smar HT2012A 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 HT3012The 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). |
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Spring Technology HT2012 and HT2015These are produced by Springfield Research Group, a renamed (after the recent sale) SMAR Research Corporation. See their HART semiconductor products here.
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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 0743849A 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 FX614A 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 (pin compatible with A5191HRT and HT2015 - PLCC and LQFP packages), SD2017 (pin compatible with SD2015, simplified external circuit - LQFP32), SD2057 (pin compatible with AD5700 - QFN24), SD2085 (pin compatible with DS8500 - QFN20)A range of HART modem chips, said to be lower current consumption than others. The new ICs integrate all necessary filtering, signal detection, modulating, demodulating,and HART signal wave shaping functions. |
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, AD434These 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/AD5700-1HART 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 DS8500HART 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 AM7910These 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. |
UK sales and support also available from HART Expert Ltd, see 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® 010001This 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 IICertified 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 HI311Information 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 FXA191Certified 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 modemInformation here. Information on all Microflex HART modems is 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 101-0016Small 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 |
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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-USBInformation 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 HI321Fully isolated from HART loop to USB. |
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® 010031Information, 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 FXA195Certified 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 StickUSB modem providing a virtual COM port for applications providing their own master software. Information here. Ifak isHRT USBUSB 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 ModemA 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 modemsInformation on the 101-0027 is here. The 101-0032 version is DIN-rail mounted. Information here. Information on all Microflex HART modems is 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-BATInformation 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.
PCSMARTISA-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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