PR Electronics 2255 F/I-F/F Converter

Features

  • Programmable f/I converter
  • Programmable decimal divider / decimal multiplier
  • Programmable frequency generator
  • Relay output as option
  • Supply voltage 24 VDC
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PR Electronics 2255 F/I-F/F Converter is a versatile device designed for frequency to current/voltage conversion and pulse processing. It features a user-programmable interface with three pushbuttons and a 3-digit LED display, making it suitable for various industrial applications involving pulse generators, flow meters, tacho-generators, and inductive sensors.

Advanced Features

  • Multifunction User Interface: The user-programmable version includes three pushbuttons and a 3-digit LED display for easy configuration and monitoring.
  • Configurable Outputs: Analog current output configurable within the 0…20 mA range and a selectable voltage output range between 0…10 VDC using internal jumpers.
  • Input and Contact Filters: Features an input filter, contact filter, and an auxiliary supply for sensors such as NAMUR and S0.
  • Frequency Generator Function: Can be used as a time base or clock generator.

Applications

  • Frequency to Current/Voltage Conversion (f/I): Converts frequency signals from pulse generators, flow meters, tacho-generators, or inductive sensors to current or voltage outputs.
  • Pulse Division/Multiplication (f/f): Used for division or multiplication of pulses and as a buffer for fast pulse trains.
  • Frequency Generation: Functions as a frequency generator for time base or clock generation applications.

Technical Characteristics

  • Front LED Indicators: Three front LEDs indicating active input (not NPN), active output (NPN or relay 1), and NAMUR input error signal.
  • Configurable Analog Output: Analog current output configurable within the 0…20 mA range.
  • Selectable Voltage Output Range: Voltage output range selectable between 0…10 VDC using internal jumpers.
  • Auxiliary Sensor Supply: Provides an auxiliary supply for sensors such as NAMUR and S0.

Mounting / Installation

  • Standard 11-Pole Socket: Mounts using a standard 11-pole socket, adaptable for DIN rail or plate use with PR’s 7023 adaptor and 7024 mounting keying.

The PR Electronics 2255 F/I-F/F Converter is an ideal solution for industries requiring precise frequency to current/voltage conversion, pulse processing, and reliable signal handling. Its user-friendly interface and versatile configuration options make it suitable for a wide range of industrial applications.

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. 125 g
COMMON SPECIFICATIONS
Supply
Supply voltage 19.2…28.8 VDC
Internal power dissipation 2.4 W
Isolation voltage
Isolation voltage, test / working 1.4 kVAC / 150 VAC
Response time
Response time (programmable) 60 ms to 999 s + period time
Warm-up time 1 min.
Signal / noise ratio Min. 60 dB
Accuracy Better than 0.1% of sel. range
Signal dynamics, output 16 bit
Effect of supply voltage change < 0.005% of span / VDC
Temperature coefficient < ±0.01% of span / °C
Linearity error < 0.1% of span
S0 supply 15 VDC / 25 mA
Special supply (programmable) 5…15 VDC / 30 mA (acc. to order)
EMC immunity influence < ±0.5%
INPUT SPECIFICATIONS
Common input specifications
Max. offset 90% of selec. max. value
Measurement range 0…20 kHz
Min. measurement range 0.001 Hz
Low cut-off frequency 0.001 Hz
Min. pulse length 25 μs
Input types NAMUR acc. to DIN 19234 Tacho
NPN / PNP
TTL
S0 acc. to DIN 43864
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
Common output specifications
Updating time 20 ms
Relay output
Max. switching frequency 20 Hz
Max. voltage 150 VRMS
Max. current 2 AAC
Max. AC power 300 VA
Max. load at 24 VDC 1:00 AM
Voltage output through internal shunt See manual for details
Max. current, NPN output 130 mA
Max. voltage, NPN output 28 VDC
Frequency output range 0…1000 Hz
Min. pulse length 500 μs
Max. pulse length 999 ms
Max. duty cycle 50%
Frequency generator: Pulse length f < 50 Hz Min. 10 ms Max. 999 s
Pulse length f ≥ 50 Hz 50% duty cycle
of span = of the presently selected range
OBSERVED AUTHORITY REQUIREMENTS
EMC 2014/30/EU
LVD 2014/35/EU
EAC TR-CU 020/2011

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