Plug connection

• US 6,476,520 B1
• Filed: 11/09/1999
• Issued: 11/05/2002
• Est. Priority Date: 05/09/1997
• Status: Expired due to Term

• Current Assignee: Knick Elektronische Messgeraete GmbH & Co. KG
• Original Assignee: Bartec Componenten Und Systeme GmbH
• Inventors: Böhm, Alfred, Barlian, Reihhold A., Lang, Rainer
• Primary Examiner(s): Fleming, Fritz
• Assistant Examiner(s): RIOS CUEVAS, ROBERTO JOSE
• Application Number:
  US09/423,438
• Time in Patent Office: 1,092 Days
• Field of Search: 307/104, 340/310.01, 340/572--57, 340/568--56, 340/310-6-3, 439/38, 439/620, 439/950, 361/58
• US Class Current: 307/104
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02H 9/008 Intrinsically safe circuits
• CPC Class Codes: H04L 25/0266 Arrangements for providing Galvanic isolation, e.g. by means of magnetic or capacitive coupling
• CPC Class Codes: Y10S 439/95 Electrical connector adapted to transmit electricity to mating connector without physical contact, e.g. by induction, magnetism, or electrostatic field

Abstract

A plug connection for a hazardous location for energy and data transmission by means of electrical quantities in a bus system has a primary part and a secondary part constructed as transmitters, as well as limiting means for the electrical quantities to be transmitted. The limiting means are located in the primary part and are designed for limiting the electrical quantities to be transmitted to the secondary part to values allowed for the particular type of protection.

Claims

1. Plug connection for a hazardous location for energy and data transmission between at least one electrical load and a bus system,

said plug connection having a primary part and secondary part constructed as transmitters,

said primary part and said secondary part being separable and connectable;

and

said primary part being associated with a converter, wherein

said bus system is connected to said plug connection in each case via separate energy and data supply lines,

at least in the primary part are provided limiting means for the electrical quantities to be transmitted, and

at least the secondary part is associatable with the hazardous location.

2. Plug connection according to claim 1,

wherein the transmitter is designed inductively with “ safe galvanic separation”

.

3. Plug connection according to claim 1,

wherein the primary part and optionally also the secondary part in each case have a transceiver and that at least one of the primary part and the secondary part have a microprocessor and an addressable memory, particularly an EEPROM.

4. Plug connection according to claim 1,

wherein the primary part has a device for monitoring the load connected to the secondary part and the limiting means for limiting the electrical quantities to be transmitted to the secondary part are limited to values that meet the requirements for at least one of International Electrotechnical Commission, IEC protection methods “

e”

, “

i”

, “

m”

, “

d”

, “

p”

, and “

q”

, Verband Deutscher Elektrotechniker, VDE protection method “

s”

, and International Electrotechnical Commission, IEC protection method “

o”

.

5. Plug connection according to claim 4,

wherein the load monitoring device only activates the energy transmission of the primary part when a signal is received from the secondary part ensuring that the connected load operates correctly.

6. Plug connection according to claim 1,

wherein between said primary part and said secondary part an air gap is formed which meets the requirements of International Electrotechnical Commission, IEC protection method “

d” and

a protective device for monitoring the air gap is provided.

7. Plug connection according to claim 1,

wherein said secondary part has a non-volatile memory for storing at least one of address and further characteristics of at least one of the plug connection and the connected load, said secondary part contains a monitoring device for data supplied by the bus system and the monitoring device, on receiving from the bus system data addressed to said secondary part of the plug connection, activates the electronic components of the secondary part.

8. Plug connection according to claim 6,

wherein said primary part has a coil provided in a primary-side ferrite core with an insulation, said secondary part has a coil wound around a mandrel-like ferrite core and surrounded by insulation and said mandrel-like ferrite core, when the plug connection is plugged together, is introduced into a recess of the primary-side ferrite core in such a way that the coil of the primary-side ferrite core and the coil of the mandrel-like ferrite core of the secondary part are arranged coaxially and in the same axial segment.

9. Plug connection according to claim 8,

wherein said primary part has an end face with an annular attachment, which is constructed as a centering device and spacing part, made from a magnetically poorly conducting material and the mandrel-like, secondary-side ferrite core has a base segment also made from a magnetically poorly conducting material.

10. Plug connection according to claim 6,

wherein said primary part comprises a primary-side ferrite core and said secondary part comprises a secondary-side ferrite core,

said primary-side ferrite core and said secondary-side ferrite core are in each case in the form of a cup with a cup core and around the particular cup core in each case is wound a coil, which is insulated and in the assembled state of the plug connection oriented coaxially with their faces against one another.

11. Plug connection according to claim 1,

wherein there is an optical device for data transmission between said primary part and said secondary part.

12. Plug connection according to claim 11,

wherein the optical device in the primary part has a light-conducting rod coupled to a light-conducting rod in the secondary part and that on both sides there are transmitters and receivers for opto-electronic data conversion.

13. Plug connection according to claim 1,

wherein there is a device, provided with electrical contacts, for the transmission of electrical quantities between primary part and secondary part.

14. Plug connection according to claim 1,

wherein the bus system has at least two electrical lines for energy transmission, at least two electrical lines for information transmission and a shield.

15. Plug connection according to claim 1,

wherein the bus system is constructed in the nodal point arrangement and the nodal points are terminals that meet the requirements of International Electrotechnical Commission, IEC protection method “

increased safety e”

.

16. Energy and data transmission method for hazardous locations, in which energy and data can be transmitted by means of a bus system to a primary part of at least one plug connection according to claim 1 and which energy and data are transmittable from a secondary part of the plug connection to at least one load,

wherein the primary part the type of protection of the connected load is determined and that the electrical quantities to be transmitted are limited to maximum values corresponding to the determined type of protection.

17. Energy and data transmission method according to claim 16,

wherein the maximum values of the electrical quantities to be transmitted, with the secondary part removed, are limited to values that meet the requirements of International Electrotechnical Commission, IEC protection method “

intrinsically safe i”

or to values that meet the requirements for “

protection method simple equipment”

.

18. Plug connection according to claim 15,

wherein the nodal points are rigid connections.

19. Plug connection according to claim 15,

wherein the nodal points are soldered joints that meet the requirements of Electrotechnical Commission, IEC increased safety protection method “

e”

.

26. Plug connection according to claim 18,

wherein the locking mechanism is a bayonet closure.

20. Plug connection for a hazardous location for energy and data transmission between at least one electrical load and a bus system,

said plug connection having a primary part and secondary part constructed as transmitters,

said primary part and said secondary part being separable and connectable;

and

said primary part being associated with a converter, wherein said bus system is connected to said plug connection in each case via separate energy and data supply lines,

at least in the primary part are provided limiting means for the electrical quantities to be transmitted, and

at least the secondary part is associatable with the hazardous location,

wherein the primary-side casing of the plug connection is designed to meet the requirements of at least one of International Electrotechnical Commission, IEC protection method “

pressure-tight enclosure d” and

International Electrotechnical Commission, IEC protection method “

sealed enclosure m”

or to meet the requirements of one of International Electrotechnical Commission, IEC protection methods “

p” and

“

q”

, Verband Deutscher Elektrotechniker, VDE protection method “

s”

, and Electrotechnical Commission, IEC protection method “

o”

, the supply lines of the bus system are constructed as three or four-wire lines, the plug connection is designed for bidirectional data transmission and the primary part and secondary part in each case have a modulator-demodulator-device for data.

21. Plug connection for a hazardous location for energy and data transmission between at least one electrical load and a bus system,

said plug connection having a primary part and secondary part constructed as transmitters,

said primary part and said secondary part being separable and connectable;

and

said primary part being associated with a converter, wherein said bus system is connected to said plug connection in each case via separate energy and data supply lines,

at least in the primary part are provided limiting means for the electrical quantities to be transmitted, and

at least the secondary part is associatable with the hazardous location,

wherein between said primary part and said secondary part an air gap is formed which is adapted to meet the requirements of Electrotechnical Commission, IEC protection methods protection method “

d” and

a protective device for monitoring the air gap is provided,

wherein said primary part has a coil provided in a primary-side ferrite core with an insulation, said secondary part has a coil wound around a mandrel-like ferrite core and surrounded by insulation and that said mandrel-like ferrite core, when the plug connection is plugged together, is introduced into a recess of the primary-side ferrite core in such a way that the coil of the primary-side ferrite core and the coil of the mandrel-like ferrite core of the secondary part are arranged coaxially and in the same axial segment,

wherein the air gap extends from a space between the primary-side ferrite core and the secondary-side ferrite core to a locking mechanism between a box nut and the primary-side plug casing, as well as a space between the box nut and a secondary-side plug casing.

22. Plug connection according to claim 21,

wherein the locking mechanism is a threaded connection.

23. Plug connection according to claim 21,

wherein the locking mechanism is a bayonet closure.

24. Plug connection for a hazardous location for energy and data transmission between at least one electrical load and a bus system,

said plug connection having a primary part and secondary part constructed as transmitters,

said primary part and said secondary part being separable and connectable;

and

said primary part being associated with a converter, wherein said bus system is connected to said plug connection in each case via separate energy and data supply lines,

at least in the primary part are provided limiting means for the electrical quantities to be transmitted, and

at least the secondary part is associatable with the hazardous location,

wherein between said primary part and said secondary part an air gap is formed which is adapted to meet the requirements of Electrotechnical Commission, IEC protection method “

d” and

a protective device for monitoring the air gap is provided,

wherein said primary part comprises a primary-side ferrite core and said secondary part comprises a secondary-side ferrite core,

said primary-side ferrite core and said secondary-side ferrite core are in each case in the form of a cup with a cup core and that around the particular cup core in each case is wound a coil, which is insulated and in the assembled state of the plug connection oriented coaxially with their faces against one another,

wherein the air gap extends from a space between the primary-side ferrite core and the secondary-side ferrite core to a locking mechanism between a box nut and the primary-side plug casing, as well as a space between the box nut and a secondary-side plug casing.

25. Plug connection according to claim 24,

wherein the locking mechanism is a threaded connection.