Ramp Generator - PR Electronics 2281

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.

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.

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