Ramp Generator – PR Electronics 2281

Features

  • Multiple functions
  • Programmable from front
  • 3-digit LED display
  • NPN and PNP inputs
  • Internal ramp time or external pulses
  • Reset or preset function
Enquiry
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Advanced features

  • The user interface consists of a 3-digit display and 3 function keys in the front to change a function, ramp time or an output signal range.

Application

  • To convert digital signals to a time-controlled analog signal with either internally entered up/down time or with external pulses for up/down function.
  • 2-phase encoder.
  • Ramp generator with internal time measurement.
  • Ramp generator with external pulses.

Technical characteristics

  • LED’s for up, reset and down.
  • 6 digital inputs make it possible to choose reset and up/down functions as either NPN or PNP input (+24 VDC).
  • Via an analog switch the up and down inputs can be switched between input filters for a pulse length > 10 ms or > 0.5 ms. The 10 ms filter is used for elimination of contact-bounce.
  • Analog standard current output of 0/4…20 mA or jumper selectable 0/2…10 mA, and standard voltages of 0/0.2…1 VDC, 0/2…10 VDC or special.
  • Mounting for a standard 11-pole socket which can be adapted for DIN rail or plate use with PR’s 7023 adaptor and 7024 mounting keying.

Specification

ENVIRONMENTAL CONDITIONS
Operating temperature -20°C to +60°C
Calibration temperature 20…28°C
Relative humidity < 95% RH (non-cond.)
Protection degree IP50
MECHANICAL SPECIFICATIONS
Dimensions (HxWxD) 80.5 x 35.5 x 84.5 mm (D is without pins)
Weight approx. 120 g
COMMON SPECIFICATIONS
Supply
Supply voltage 19.2…28.8 VDC
Max. required power 2.7 W
Internal power dissipation 2.4 W
Response time
Response time < 60 ms
Signal / noise ratio Min. 60 dB
Signal dynamics, output 16 bit
Up ramp time 0.1…999999 s
Down ramp time 0.1…999999 s
External pulses 1…15,615,744
Effect of supply voltage change < 0.005% of span / VDC
Temperature coefficient < ±0.01% of span / °C
Linearity error < 0.1% of span
EMC immunity influence < ±0.5%
INPUT SPECIFICATIONS
Digital input Up / down inputs Reset inputs
NPN, digital input Pull up 24 VDC / 6.9 mA
PNP, digital input Pull down 0 VDC / 6.9 mA
Pulse length >10 ms / > 0.5 ms (programmable) > 30 ms
Input frequency 50 Hz / 1 kHz (max.) 16 Hz
OUTPUT SPECIFICATIONS
Current output
Signal range 0…20 mA
Min. signal range 5 mA
Load (@ current output) ≤ 600 Ω
Load stability ≤ 0.01% of span / 100 Ω
Current limit 20.5 mA
Voltage output through internal shunt See manual for details
of span = of the presently selected range
OBSERVED AUTHORITY REQUIREMENTS
EMC 2014/30/EU
EAC TR-CU 020/2011

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PR Electronic 2281 Ramp generator-DpstarGroup

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