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In English Suomeksi


Frequency input





The field display is designed for pulse sensors, whose frequency will be measured. The inputs are NPN-, PNP-, Namur -sensors, closing contact or a pickup-sensor. The front panel has large 20-mm-high red LED digits, the readability of which is about 10 metres.

The input frequency range 0,0001Hz..5 kHz is exceptionally wide starting with extremely low frequencies. The display is scaleable on the whole frequency range, e.g. 0-1,23 Hz can correspond to the range 0-5000 on the display . Output is freely scaleable on the basis of the display, e.g. 4-20 mA. The measuring method applied for low frequencies is to measure the time interval between two incoming pulses and for higher frequencies to measure the frequency.

The display also provides a power supply of 24VDC, max. 150 mA for a sensor. The display has two optional card slots: one for output 0/4-20 mA, 0-10V, and the other for alarms relay or serial output RS-485/232. Optional cards can easily be added on afterwards as well.

The alarm relay card (or I/O -card) may also be used as an output for a pulse divider. The pulse divider transmits a pulse for instance to an external counter when the pulse rate set in the divider is reached (e.g. 1 pulse/ 1000 litres).  Case protection rating is IP65.

 The display is also available as a panelmeter, model 2051.

Load manuals (pdf)
Load datasheets (pdf)

Input details


Namur, NPN, Pickup, pulse sensors, closing contact


0.01% full scale

sensor supply

24 VDC, max. 150 mA

Connection details

baud rates

300, 600, 1200, 2400, 4800, 9600 and 19200

bus protocol

Nokeval SCL

Display details

display color


number of digits


indicator lights

alarm levels 1-4, min and max


7-segment LED

digit size

20 mm

Power supply

power consumption

12 W

supply voltage

230 VAC: 85...240 VAC, 24 VDC: 12...32 VDC

General information

protection class



180 x 130 x 80 mm (LWD)


wall mount

minimum ambient temperature

-10 °C

case material

polycarbonate, light gray

maximum ambient temperature

60 °C

Scalable speed display for pulse sensors (pulse/sec.)