GB1412036A - Interface assembly in a process control system for use where there is a fire hazard - Google Patents

Interface assembly in a process control system for use where there is a fire hazard

Info

Publication number
GB1412036A
GB1412036A GB1101673A GB1101673A GB1412036A GB 1412036 A GB1412036 A GB 1412036A GB 1101673 A GB1101673 A GB 1101673A GB 1101673 A GB1101673 A GB 1101673A GB 1412036 A GB1412036 A GB 1412036A
Authority
GB
United Kingdom
Prior art keywords
interface
signal
process control
supply
control system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1101673A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schneider Electric Systems USA Inc
Original Assignee
Foxboro Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Foxboro Co filed Critical Foxboro Co
Publication of GB1412036A publication Critical patent/GB1412036A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/008—Intrinsically safe circuits

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Safety Devices In Control Systems (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
GB1101673A 1972-04-06 1973-03-07 Interface assembly in a process control system for use where there is a fire hazard Expired GB1412036A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US24154572A 1972-04-06 1972-04-06

Publications (1)

Publication Number Publication Date
GB1412036A true GB1412036A (en) 1975-10-29

Family

ID=22911132

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1101673A Expired GB1412036A (en) 1972-04-06 1973-03-07 Interface assembly in a process control system for use where there is a fire hazard

Country Status (7)

Country Link
JP (1) JPS4914881A (enrdf_load_stackoverflow)
CA (1) CA983569A (enrdf_load_stackoverflow)
DE (1) DE2316039C2 (enrdf_load_stackoverflow)
FR (1) FR2179151B1 (enrdf_load_stackoverflow)
GB (1) GB1412036A (enrdf_load_stackoverflow)
IT (1) IT982957B (enrdf_load_stackoverflow)
NL (1) NL7304743A (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4799125A (en) * 1986-09-05 1989-01-17 Raychem Limited Circuit protection arrangement
GB2222037A (en) * 1988-08-19 1990-02-21 Cooper Ind Inc Intrinsic safety module interface
GB2232021A (en) * 1989-03-02 1990-11-28 Hemscheidt Maschf Hermann An intrinsically safe power supply
GB2238191A (en) * 1989-10-19 1991-05-22 Drexelbrook Controls Intrinsically safe system
WO2016141974A1 (en) * 2015-03-10 2016-09-15 Hewlett-Packard Development Company, L.P. Safety protection circuit
EP3444912A1 (en) * 2017-08-16 2019-02-20 Honeywell International Inc. Intrinsic safety (is) barrier with separat circuits for voltage clamping and energy limiting

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2359532A1 (fr) * 1976-07-20 1978-02-17 Cit Alcatel Dispositif de limitation des variations de potentiel des bornes d'une charge alimentee par une source de courant continu a masse flottante
SE414357B (sv) * 1978-08-17 1980-07-21 Asea Ab Overspenningsskydd for skydd av halvledarkomponenter av lageffekttyp
DE3832068A1 (de) * 1988-09-21 1990-03-22 Stahl R Schaltgeraete Gmbh Explosionsgeschuetzte elektrische sicherheitsbarriere

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1133750A (en) * 1966-12-02 1968-11-13 Foxboro Yoxall Ltd Electrical barrier device
US3631264A (en) * 1970-02-11 1971-12-28 Sybron Corp Intrinsically safe electrical barrier system and improvements therein

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4799125A (en) * 1986-09-05 1989-01-17 Raychem Limited Circuit protection arrangement
US4807081A (en) * 1986-09-05 1989-02-21 Raychem Limited Circuit protection arrangement
GB2222037A (en) * 1988-08-19 1990-02-21 Cooper Ind Inc Intrinsic safety module interface
US4954923A (en) * 1988-08-19 1990-09-04 Cooper Industries, Inc. Intrinsic safety module interface
GB2232021A (en) * 1989-03-02 1990-11-28 Hemscheidt Maschf Hermann An intrinsically safe power supply
GB2232021B (en) * 1989-03-02 1993-07-28 Hemscheidt Maschf Hermann An intrinsically safe power supply unit
GB2238191A (en) * 1989-10-19 1991-05-22 Drexelbrook Controls Intrinsically safe system
WO2016141974A1 (en) * 2015-03-10 2016-09-15 Hewlett-Packard Development Company, L.P. Safety protection circuit
US10418806B2 (en) 2015-03-10 2019-09-17 Hewlett-Packard Development Company, L.P. Safety protection circuit
EP3444912A1 (en) * 2017-08-16 2019-02-20 Honeywell International Inc. Intrinsic safety (is) barrier with separat circuits for voltage clamping and energy limiting

Also Published As

Publication number Publication date
DE2316039C2 (de) 1984-01-26
IT982957B (it) 1974-10-21
FR2179151A1 (enrdf_load_stackoverflow) 1973-11-16
NL7304743A (enrdf_load_stackoverflow) 1973-10-09
AU5251773A (en) 1974-08-22
FR2179151B1 (enrdf_load_stackoverflow) 1977-08-05
CA983569A (en) 1976-02-10
JPS4914881A (enrdf_load_stackoverflow) 1974-02-08
DE2316039A1 (de) 1973-10-18

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Legal Events

Date Code Title Description
PS Patent sealed
433D Application made for revocation (sect. 33/1949)
433C Case decided by the comptroller ** specification amended (sect. 33/1949)
SP Amendment (slips) printed