www.nokeval.com [email protected] 2051 Panelmeter for pulse sensors • Input frequency range 0,0001 Hz..5 kHz • Sensors: NPN, PNP, Namur, Closing contact or Pickup • 6-digit processor-based LED display, digit height 15 mm • Galvanically isolated output 0/4..20 mA, 0..10V • Two alarm relays • Pulse output for a cumulative counter • Serial output RS-232 or RS-485 • Sensor supply 24 VDC, max. 150 mA • Power supply 85..240VAC or 12..32 VDC/24 VAC The panelmeter 2051 is designed for pulse sensors, whose frequency will be measured. The inputs are NPN-, PNP-, Namur -sensors, closing contact or a pickup-sensor. 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 panelmeter has two optional card slots: one for output 0/ 4-20 mA, 0-10V, and the other for alarms or serial output RS485/232. 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). Separate passwords can be set for access to the configuration menu and alarms. Brightness of the display is selectable. Front panel protection rating is IP65. The panelmeter series 2000 is very flexible and easy to modify by changing input cards for different kinds of sensors, such as temperature sensors, pulse sensors, serial inputs etc. The modification does not require any calibration. The optional cards are the same for all the instruments in this product family. Each panelmeter type has its own datasheet. Separate field enclosures can be supplied for 1 to 3 panelmeters. The 2051 is also available in the field display series, model 2800-2051. Output signals as an option: Pulse output to the counter (a cumulative counter) Adjustable pulse divider Alarm relay, 230V, 2A Output 0/4..20 mA, or 0-5/10V Serial output R

0,0001..5 kHz on the whole display range freely selectable 1 ..2 incoming pulses NPN, PNP, Namur, pick-up or closing contact input pulse 0 = <1V, 1 =5..32V 24 VDC ±5 %, max. 150 mA, isolated from power supply measuring the time interval between incoming pulses 0,01 % of span General: Display Input filter Case material Operating temperature Terminals Power supply Front panel protection Weight Input frequency range: Display scaling: Decimal point selection: Updating time of display: Sensors: Sensor supply: Measuring method: Accuracy: Output signal (optional): Output 0..20 mA, 4..20 mA, max. load...