NMTU/F - AC VOLTAGE AND FREQUENCY TRANSDUCERS
The NMTU/F device is an AC voltage and frequency transducer with two independent analogous outputs. The A output measures AC voltage, the B output measures the frequency of input voltage. That´s why one single NMTU/F transducer is able to replace two customary transducers, thus making it possible to achieve significant savings in installation space.
ENGINEERING PARAMETERS
- power supply voltage 20V to 300V DC or 24V to 260VAC/50 Hz (60Hz)
- power consumption 3 VA at full load at the outputs
- frequency of the measured voltage 45 to 65 Hz
- accuracy of frequency measurement ± 0.025 Hz
± 0.05 Hz for output quantity rated values of I<10mA, U<5V
- accuracy of voltage measurement ± 0.2 % Un (rated voltage)
± 0.5 % Un for output quantity rated values of I<10mA, U<5V
- number of voltage measuring inputs 1
- rated input voltage selectable within 57.7V to 500 V
- overload capacity of voltage inputs
constant operation 120% of rated Un voltage
short-time 200% Un during 1 s
- number of analogous outputs 2
current outputs 0...20mA; 4...20 mA, or 0…x mA (x= 5 mA to 20 mA)
voltage outputs 0...10 V or 0…x V (x= 1V to 10 V)
- rated load at the output
voltage output Run = Uan / 2mA
current output Rin = 5 V/ Ian (Ian = rated output current)
- permitted output load range
voltage output Ru > than 0.25 Run
current output Ri loop resistance < than 2xRin
- highest output voltage ±18V DC
- settling time after connecting the power supply 1 minute
- dielectric strength (to ČSN EN 61010-1 standard)
between inputs and outputs, between inputs and the power source, between inputs and the auxiliary
power source, terminals against the cover 3700V, 50Hz/1min
between the inputs 1000 V, 50 Hz/min
- material of the case PC/ABS
- weight max. 200g
- dimensions 101x114x35 mm
- operating temperature range -25° C to +70°C
- operating position any desired
- protection degree IP 20
- electromagnetic compatibility radiation: in accordance with ČSN EN 55011-B standard
immunity: in acc. with ČSN EN 6100-6-2, ed.3 standard
- safety corresponding to ČSN EN 61010 – 1 standard: equipment of the protection class II, overvoltage category III in the installation (highest voltage of 300Vrms against the earth), pollution degree 2
Order code
The parameters of the input and output are defined by a four-digit code. It is essential to accurately specify the X parameters in the purchase order.
Example of an order code:
NMTU/F 3 2 2 1
3………………….… rated input voltage of 100 V
2 ……………… frequency measuring range 45…50…55Hz
2 ………… output A 4…12…20 mA
1 …… output B 0…10…20 mA
|
Ordering |
NMTU/F |
* |
* |
* |
* |
|
Rated input voltage [V] |
100/ √3 |
1 |
|
|
|
|
110/ √3 |
2 |
|
|
||
|
100 |
3 |
|
|
||
|
110 |
4 |
|
|
||
|
230 |
5 |
|
|
||
|
400 |
6 |
|
|
||
|
other value |
X |
|
|
||
|
Frequency measuring range [Hz] |
48…50…52 Hz |
|
1 |
|
|
|
45…50…55 Hz |
|
2 |
|
|
|
|
58…60…62 Hz |
|
3 |
|
|
|
|
55…60…65 Hz |
|
4 |
|
|
|
|
other value |
|
X |
|
|
|
|
Output A voltage |
0…20 mA |
|
|
1 |
|
|
4…20 mA |
|
|
2 |
|
|
|
0…10 V |
|
|
3 |
|
|
|
other value |
|
|
X |
|
|
|
Output B voltage frequency |
0…20 mA |
|
|
|
1 |
|
4…20 mA |
|
|
|
2 |
|
|
0…10 V |
|
|
|
3 |
|
|
other value |
|
|
|
X |
MANUFACTURED BY:
METRA BLANSKO s.r.o. Company ID No.: 023 56 180
Pražská 2536/7 Tax reg. No.: CZ02356180
67801 Blansko, Czech Republic Web: www.metra.cz