Communications: electrical – Systems – Selsyn type
Patent
1998-12-21
2000-10-17
Crosland, Donnie L.
Communications: electrical
Systems
Selsyn type
34031002, 34031007, 340538, H04B 100
Patent
active
061338222
ABSTRACT:
The transducer supply is configured for supplying a passive transducer arranged in an explosion-hazard zone with electrical energy from a DC voltage source. The electrical energy is transmitted via a two-wire connection, via which in the opposite direction the measured value sensed by the transducer is transmitted by the transducer setting the direct current obtained from the DC voltage source to a value variable between two limit values. As a means of protection a transformer is inserted in the two-wire connection which affects DC decoupling. The direct current is chopped in accordance with the principle of a DC voltage converter at the primary side of the transformer and re-rectified on the secondary side. To permit connection of an active transducer instead of a passive transducer, the active transducer having its own energy supply and furnishing at its output connections a direct current in a quantity representing the measured value, an adapter circuit controlled by the output current of the active transducer is inserted between the output connections of the rectifier circuit and the connecting terminals provided for connecting the active transducer, this adapter circuit loading the rectifier circuit with a direct current which is proportional to the output current of the active transducer.
REFERENCES:
patent: 3757195 (1973-09-01), Sklaroof
patent: 3764880 (1973-10-01), Rose
patent: 4292633 (1981-09-01), Goodwin, Jr. et al.
patent: 5148144 (1992-09-01), Sutterlin
patent: 5539375 (1996-07-01), Atherton
patent: 5742225 (1998-04-01), Wetzel et al.
Burkitt, C.J., "2-Wire Temperature Transmitters Offer DesignBenefits", Feb., 1972, Control & Instrumentation, pp. 34-35.
Pfandler Martin
Strutt Bernd
Crosland Donnie L.
Endress & Hauser GmbH & Co.
LandOfFree
Transducer supply does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transducer supply, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transducer supply will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-473284