NV6A Datasheet, PDF (1/2 Pages) List of Unclassifed Manufacturers – Filtering signal conditioner for sensor signal matching to a 4-20mA, 2-wire interface

NV6a
Filtering signal conditioner
for sensor signal matching
to a 4…20mA, 2-wire inter-
face
Features
• low noise and low drift
• 2-wire connection – power supplied by
current loop
• loop current limitation
• integrated reverse polarity protection
• highly stable sensor supply voltage
• protection against reverse polarity of
sensor connection
• zero position and gain adjustable via poten-
tiometers
• electronic components hermetically sealed
• optionally frequency programmable, active
3^rd order low pass filter
• optional high pass filter
• different connector options
Description
The NV6a amplifies, filters and normalizes the output signals of SEIKA sensors. The symmetrical output
signal enables unproblematic subsequent signal processing on the basis of 4…20mA current loop technol-
ogy.
The NV6a does not require a separate supply voltage, as the internal operating voltage feeds off the current
loop. The NV6a furthermore provides a highly stable 5V sensor supply voltage with short circuit current limi-
tation.
Multiple internal switching variants allow for optimal adaptation of signal processing parameters, such as
settling time, filter cut-off frequencies and amplification and zero point adjustment, to the measuring task.
Application
The NV6a has its application anywhere a SEIKA sensor is, without much expenditure and under optimal
compatibility, to be connected to measuring equipment operating on 4…20mA, 2-wire current loop basis and
subsequent adjustment of amplification and zero position are necessary.
Typical applications are the coupling with memory programmable control systems and the signal transmis-
sion over long distances with little transmission line setup.
Technical Specifications
Dimensions excluding connector
Terminal voltage
Minimum loop current excluding sensor
Maximum loop current
Operating temperature
Internally generated sensor supply voltage
Temperature drift of sensor supply voltage
Maximum allowable sensor current
Signal loop current range
Zero current
Compensation range of sensor offset voltage
U_{S_offset}
Amplification range with respect to a loop cur-
see dimension drawing
+8…+30 Volt (reverse polarity protected to -70Volt)
approx. 2mA
approx. 24mA
-40...+85°C
+5,00 Volt
20 ppm/Kelvin
approx. 1,5mA
4...20mA
12mA
2,3...2,7 Volt (larger ranges, e.g. for B1 in Z direc-
tion on request)
U_{S_offset}±100mV, U_{S_offset}±300mV (on request)
SEIKA Mikrosystemtechnik GmbH * Ellharter Str.10 * D-87435 Kempten * Tel: [phone] Fax: [phone]
Tope Co., Ltd. Tel: [phone] Fax: [phone] httrp://www.sensor.com.tw e-mail: [e-mail]
(7/2001) - NV 3 -