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)
Namur, NPN, Pickup, pulse sensors, closing contact
0.01% full scale
24 VDC, max. 150 mA
300, 600, 1200, 2400, 4800, 9600 and 19200
number of digits
alarm levels 1-4, min and max
230 VAC: 85...240 VAC, 24 VDC: 12...32 VDC
180 x 130 x 80 mm (LWD)
minimum ambient temperature
polycarbonate, light gray
maximum ambient temperature