IT982957B - ELECTRONIC PROCESS CONTROL EQUIPMENT FOR DANGEROUS AREAS - Google Patents

ELECTRONIC PROCESS CONTROL EQUIPMENT FOR DANGEROUS AREAS

Info

Publication number
IT982957B
IT982957B IT4923073A IT4923073A IT982957B IT 982957 B IT982957 B IT 982957B IT 4923073 A IT4923073 A IT 4923073A IT 4923073 A IT4923073 A IT 4923073A IT 982957 B IT982957 B IT 982957B
Authority
IT
Italy
Prior art keywords
process control
control equipment
dangerous areas
electronic process
dangerous
Prior art date
Application number
IT4923073A
Other languages
Italian (it)
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
Application granted granted Critical
Publication of IT982957B publication Critical patent/IT982957B/en

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
IT4923073A 1972-04-06 1973-04-04 ELECTRONIC PROCESS CONTROL EQUIPMENT FOR DANGEROUS AREAS IT982957B (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
IT982957B true IT982957B (en) 1974-10-21

Family

ID=22911132

Family Applications (1)

Application Number Title Priority Date Filing Date
IT4923073A IT982957B (en) 1972-04-06 1973-04-04 ELECTRONIC PROCESS CONTROL EQUIPMENT FOR DANGEROUS AREAS

Country Status (7)

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

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2359532A1 (en) * 1976-07-20 1978-02-17 Cit Alcatel Balanced load protection circuit - is controlled from pilot network and parallel nominal load connected across supply
SE414357B (en) * 1978-08-17 1980-07-21 Asea Ab OVERVOLTAGE PROTECTION FOR PROTECTION OF SEMICONDUCTOR COMPONENTS OF LOW EFFECT TYPE
US4807081A (en) * 1986-09-05 1989-02-21 Raychem Limited Circuit protection arrangement
US4954923A (en) * 1988-08-19 1990-09-04 Cooper Industries, Inc. Intrinsic safety module interface
DE3832068A1 (en) * 1988-09-21 1990-03-22 Stahl R Schaltgeraete Gmbh EXPLOSION PROTECTED ELECTRICAL SAFETY BARRIERS
DE3906621C2 (en) * 1989-03-02 1995-05-04 Hemscheidt Maschf Hermann Intrinsically safe power supply unit
DE4033313A1 (en) * 1989-10-19 1991-06-13 Drexelbrook Controls Intrinsic security system
WO2016141974A1 (en) * 2015-03-10 2016-09-15 Hewlett-Packard Development Company, L.P. Safety protection circuit
US10942499B2 (en) * 2017-08-16 2021-03-09 Honeywell International Inc. Intrinsic safety (IS) barrier with associated energy limiting apparatus

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

Also Published As

Publication number Publication date
FR2179151B1 (en) 1977-08-05
GB1412036A (en) 1975-10-29
DE2316039C2 (en) 1984-01-26
DE2316039A1 (en) 1973-10-18
JPS4914881A (en) 1974-02-08
CA983569A (en) 1976-02-10
AU5251773A (en) 1974-08-22
FR2179151A1 (en) 1973-11-16
NL7304743A (en) 1973-10-09

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