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Kiepe Pulse Transducer DG contactless
APPLICATION
The DG type proximity switches are contactless pulse transducers. They are especially designed to meet operating conditions, where high switching accuracy, durability, corrosion and wear resistance are required. The pulse transducers generate pulses, the frequencies of which is proportional to the rational speed. The evaluation of the generated pulses is assesed and monitored by either of the Kiepe speed monitors EDO or JMNC.
OPERATING PRINCIPLES
2-Wire Pulse Transducer according to NAMUR-EN 50227
Essentially, these pulse transducers consists of an electronic oscillator, the high-frequency stray field of which makes up the response zone. When a metallic object is immersed into the effective area of the stray zone, the resonant circuit is short- circuited and its internal resistance becomes high-impedance. The oscillations stop and the current consumption of the pulse generator degreases. This current change is analysed by the Kiepe speed monitors.
3-Wire Pulse Transducer, PNP-switching
These pulse transducers differ from the NAMUR types by an additional downstream flip-flop, which effects a change of the output potential from GND to +Ub when the active zone is damped. These pulse transducers can also be directly connected to a PLC.
INSTALLATION
The pulse transducers are to be installed in such a way that within the sensing zone one or several metal parts (Fe metals, if possible) can rotate passing the transducer´s head within the response distance. One pulse is generated per metal part. Pulse multiplication via several metal parts is recommended for low rational speeds. the metal parts should at least have the dimensions of the transducer´s head and the distance between any two parts should not be below twice the diameter of the transducer´s head.
The pulse transducer is fastened with two fixing nuts or by means of the enclosed plastic mounting clips c / w welding plate. Since the pulse transducers are suitable for a flush mounting they can be screwed directly in a thread. In order not to influence the sensitivity of the pulse transducer, the distance between the pulse transducer´s head and any metal machine parts has to be at least 24 mm for M 18 and 30 mm for M 30 pulse transducers.
TECHNICAL DATA
2-Wire-Pulse Transducer according to NAMUR-EN 50227
Rated operational voltage: UO DC 8,2 V
Internal resistance:
Ri 1000 Ω
Iactivated ^ 1,2 mA
Inon-activated 6 2,1 mA
3-Wire-Pulse Transducer, PNP-switching
Rated operational voltage: UB DC 10 … 30 V, completely polarized
Rated operational current: Ie 200 mA
GENERAL DATA
Standards: EN 60947-5-2; EN 50227 (only NAMUR-types); EN 50081-2; EN 50082-2; VDE 0110 – pollution degree 3
Protection: IP 67 according to EN 60529
Housing: Chrome-plated brass PA 12-GF 30 for temperature resistant types
Ambient temperature:
Standard :- 25 °C … + 70 °C
TN-Type : – 40 °C … + 70 °C
TH-Type: – 25 °C … +100 °C
Connecting cable:
2 x 0,5 mm2, length 2 m for NAMUR-types
3 x 0,34 mm2, length 2 m for PNP-types
