The NV6a is used for excitation, for filtering, and for standardization of the different SEIKA sensors output signals. The 4..20mA output signal permits a problem-free signal transfer to measurement equipment such as an oscilloscope, AD-cards in PCs, or to other OEM equipment.
Even with large changes at the unit power supply, the NV6a will act very stable both for offsetting the sensors zero point and on supplying a stable 4..20mA current output linear to the sensors working range.
The NV6a is used everywhere where a SEIKA sensor should be combined with a user-specific demand for high voltage output / special wishes for filtering of the sensor signal, plus where a non-stabilized 8 .30VDC supply can be an advantage for the system.
For 0..5VDC output please have a look at NV8a
For +/-4VDC output the NV4a is the correct solution.
|Dimensions||Please se drawing|
|Supply voltage||+8...+30Volt (protected against polarity reversal to -70Volt)|
|Current consumption without Sensor||app.2mA|
|Sensor supply||+5,00 Volt|
|Sensor supply-temp. drift||2ppm / Kelvin|
|Max. Loop current||App. 24m|
|Active measuring range equal to sensor range||4 20mA|
|Signal zero point||12mA|
|Off-set range US_offset||2,3 ...2,7 Volt (larger for e.g. B1 in Z-direction)|
|Excitation area with ref. to a loop current of 12+/-8mA||US_offset+/-100mV, US_offset+/-300mV ( on request)|
|Max. Load impedance at nominal 24VDc supply||app.500 W|
|Noise value on power supply||30µVs.s.|
|Signal audio-frequency noise at standard sensor||>65dB|
|Frequency range||0...10Hz, 0...200Hz, 0...1kHz + others as custom wishes|
connectors 2,54mm, length 5,7mm, Ø 0,63mm gold plated
optional: Soldering pads
Caution ! Sensor-GND and NV6a-GND (both
on same potential) must be isolated from the current-loop
! In case of multiple axes (e.g. in SW3) all sensors
grounds/housings must be isolated from each other.
Especially consider in the case of an order: Sensor
internally isolated for combination with NV6a" !
Since the supply voltages for the NV6a and the sensor are obtained from the current loop and both together require max. 3mA, an input voltage of min. 8Volt must be supplied to the NV6a. This is also required in order to guarantee correct operation when the highest loop current of approx. 24mA is used.
print out .pdf brochure on NV6a
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Last modified: maj 27, 2015