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Temperature and process input





The field display 2800-2021 is designed specially for temperature sensors and for common process inputs. The display has large 20-mm-high red LED digits, the readability of which is about 10 metres.

Selection of the sensor type and display scaling is easy via front panel keys. As an option you can choose to have a galvanically isolated output, 2 to 4 alarm relays or the serial output RS-232/485. Alarm limits and hysteresis are freely selectable via front panel keys. The display can be damped by a digital filter if necessary.The number of decimals can be selected. Brightness of the digits is selectable as well.

There are two power supply alternatives: one for line voltage 85..240 VAC and the other 12..32 VDC or 24 VAC, galvanically  isolated from input and output. The display provides a voltage supply of 24 V, max. 150 mA for sensors.  Case protection rating is IP65. The displaycan be mounted onto a wall with or without the mountingbrackets at the corners (removable).

Load manuals (pdf)
Load datasheets (pdf)
Load technical drawings

Input details


mA, mV, Ohm, Pt100, Pt1000, Thermocouples, V

supply for transmitter

24 VDC, max. 150 mA

input channels


special functions

min and max memory, square root (mV and V inputs)

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

Pt100, thermocouples, mV, 0/4..20 mA, 0-5, 0-10 V, potentiometer