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2800-2021 Field display for temperature sensors and process inputs

2800-2021 Field display for temperature sensors and process inputs
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2800-2021 Field display for temperature sensors and process inputs - 1

www.nokeval.com mail@nokeval.com 2800-2021 Field display for temperature sensors and process inputs • Thermocouples B, C, D, E, G, J, K, L, N, R, S and T Pt100/1000, Ni100, 0/4..20 mA, 0..5/10 V, -10..+10 V, potentiometer • 6-digit LED display, digit height 20 mm • Sensor selection and scaling via front panel keys • Galvanically isolated output 0/4..20 mA, 0..10V • 2 to 4 adjustable alarm relays • Serial output RS-485 and RS-232 • Linearity for process inputs < 0,007% FS • Power supply range 85..240 VAC or 12..32 VDC/ 24 VAC • Case protection rating IP65 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. Analog conversion is done by a 16-bit AD-converter (resolution 1/64000) and the number of measurements is 15 per second. Separate passwords can be set for access to the configuration menu and alarms. Case protection rating is IP65. The display can be mounted onto a wall with or without the mounting brackets at the corners (removable). The field display is part of the wide and flexible indicator series 2000 and is 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. All the input and output cards of series 2000 are available. Each display type has its own datasheet. The display is also available as panelmeter, model 2021. Modular field display 2800-2021 6-digit bright red LED display Configuration and display scaling via front panel keys (4). Inputs: Pt100 3-wire Pt100 4-wire Pt1000, Ni100 Thermocouples 0..20 mA 4..20 mA 0..5/10 V -10..+10 V Potentiometer 25, 55, 100, 1000 and 2500 mV Optional cards Alarms: 2 relays, change-over 2 relay cards, 4 alarms 3 relays NC/NO 4 I/O-ports Alarm relays Serial communication Analog output DAC Optional card slots B-C Internal bus: - 3 card slots A-C - A for input signal - B for optional cards - C for optional cards Digit. filter Input card A: - µProcessor - bus control - linearisation - panel key reading - display control - alarms and output

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2800-2021 Field display for temperature sensors and process inputs - 2

Process input: Display scaling Input resistance Accuracy Linearity Transmitter supply RTD-sensors: Measuring range Measuring current Accuracy Linearity error Thermocouples: Accuracy Cold junction error Line resitance effect Technical specifications: 0/4..20 mA, 0..5/10 V, -10..+10 V on whole display range current input 50 ohm, voltage input >1 Mohm 0.02% FS 0.007% FS 24 VDC, max. 150 mA P100 3- and 4-wire, (Pt1000, Ni100) -200..+700 °C (Pt100) 0.3 mA 0.05 % FS < 0.07°C (-200..+700 °C) types specified below 0.1 % FS 0.05°C /°C <10kohm, no effect Input resistance <10 kohm, no effect...

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