Description
2255 f/I-f/f Converter – PR Electronics is basically a frequency converter.
Advanced features -2255 f/I-f/f Converter
- The user-programmable version has a multifunction user interface consisting of three pushbuttons and a 3-digit LED displays.
Application – 2255 f/I-f/f Converter
- Typical signalling devices may be pulse generators, for instance flow meters, tacho-generators or inductive sensors.
- The f/I function is used for frequency to current / voltage conversion.
- The f/f function is used for division or multiplication of pulses and as a buffer for fast pulse trains.
- A frequency generator function e.g. used as a time base or a clock generator.
Technical characteristics
- 3 front LEDs, indicating f.in active input (not NPN), Dig.out (NPN or relay 1) active output and a NAMUR input error signal.
- Analog current output can be configured within 0…20 mA range.
- Voltage output range is selectable between 0…10 VDC by use of internal jumpers.
- Feature include input filter, contact filter and an auxiliary supply for sensor such as NAMUR and S0.
- 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.
Product is Obsolete.
Click below to view replacements: – PR 2255 f/I-f/f Converter – Obsolete Product
Manual:
2255 – f/I-f/f converter
Specifications of – 2255 f/I-f/f Converter
Electrical specifications
Environmental conditions
Operating temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -20 to +60°C
Calibration temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20…28°C
Relative air humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < 95% RH (non-cond.)
Protection degree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IP50
Mechanical specifications
Dimensions (HxWxD) (D is excl. pins) . . . . . . . . . . . . . . . . . . . . . . . . 80.5 x 35.5 x 84.5 mm
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 g
Common specifications
Supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19.2…28.8 VDC
Internal consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.4 W
Isolation, test / operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1400 VAC / 150 VAC
Warm-up time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 min.
Signal / noise ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Min. 60 dB
Signal dynamics, output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 bit
Response time (programmable) . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 ms to 999 s + period time
Temperature coeffici ent. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < ±0.01% of span / °C
Linearity error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≤ ±0.1% of span
Effect of supply voltage change. . . . . . . . . . . . . . . . . . . . . . . . . . . < 0.005% of span / VDC
Auxiliary voltages:
NAMUR supply 8 VDC ±0.5 VDC / 8 mA
S0 supply 15 VDC / 25 mA
Special (acc. to order) 5…15 VDC / 30 mA
Immunity influence < ±0.5%
Input
General
Measurement range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0…20 kHz
Min. measurement range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.001 Hz
Low cut off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.001 Hz
Max. offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90% of selec. max. value
Min. pulse width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 μs
NAMUR input
Trig-level LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≤ 1.2 mA
Trig-level HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≥ 2.1 mA
Input impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000 Ω
Sensor error detection
Short-circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≥ 7.0 mA
Breakage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≤ 0.2 mA
Response time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≤ 400 ms
acho input
Trig-level LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≤ 100 mV
Trig-level HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≥ 200 mV
Input impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≥ 100 kΩ
Max. input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 VAC pp
NPN / PNP input
Trig-level LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≤ 4.0 V
Trig-level HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≥ 7.0 V
Input impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Typ. 3.48 kΩ
TTL input
Trig-level LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≤ 1.2 VDC
Trig-level HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≥ 1.7 VDC
Input impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 kΩ
S0 input
Trig-level LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≤ 4.5 mA
Trig-level HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≤ 6.2 mA
Analog output
Current output
Signal range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0…20 mA
Min. signal range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 mA
Max. offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50% of selec. max. value
Updating time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 ms
Load (max.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA / 600 Ω / 12 VDC
Load stability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < ±0.01% of span/100 Ω
Voltage output through internal shunt
Signal range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0…10 VDC
Min. signal range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250 mV
Max. offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50% of selec. max. value
Load (min.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 kΩ
NPN output
Max. current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 mA
Max. voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 VD
f/f converter output
Signal range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0…1000 Hz
Min. pulse width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 μs
Max. pulse width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 999 ms
Max. duty cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50%
Frequency generator
Pulse width
f < 50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Min. 10 ms, max. 999 s
f ≥ 50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50% duty cycle
Relay output
Max. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Hz
Max. voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 VAC / VDC
Max. AC current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 A
Max. AC power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300 VA
Max. DC current, resistive load:
@ U relay ≤ 30 VDC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 ADC
@ U relay >30 VDC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [1380 x U -2 relay x 1.0085 Urelay ] ADC
High-Precision Frequency-to-Current and Frequency Conversion with the PR Electronics 2255 f/I-f/f Converter
The PR Electronics 2255 f/I-f/f Converter is a versatile and high-performance signal conditioning device designed to convert frequency signals into analog current or another frequency output. With exceptional accuracy and reliability, the 2255 enhances process automation by ensuring seamless signal conversion for monitoring and control applications.
Key Features of the PR 2255 f/I-f/f Converter:
- Frequency-to-Current (f/I) and Frequency-to-Frequency (f/f) Conversion: Converts pulse or frequency signals into an analog 4-20 mA signal or another frequency output.
- Universal Input Compatibility: Supports a wide range of sensor signals, including NPN/PNP, NAMUR, and TTL.
- High Accuracy & Stability: Ensures precise signal processing with minimal drift over time.
- Programmable via PC Software: Allows for easy configuration to match specific application requirements.
- Compact DIN Rail Mounting: Facilitates space-saving installation in control panels.
- Electrical Isolation: Protects against signal interference and ensures reliable operation in industrial environments.
- Fast Response Time: Provides real-time signal conversion for process control.
Applications of the 2255 f/I-f/f Converter
The PR Electronics 2255 is ideal for a variety of industrial and automation applications, including:
- Process Automation: Converting frequency signals from flow meters, tachometers, and sensors for process monitoring.
- Industrial Manufacturing: Ensuring accurate speed and RPM monitoring in production lines.
- Power & Energy: Converting frequency signals for turbine and generator monitoring.
- Water & Wastewater Treatment: Measuring flow rates from pulse-based sensors.
- HVAC & Building Automation: Controlling fan speeds and monitoring mechanical systems.
Why Choose PR Electronics 2255?
PR Electronics is a leading provider of high-quality signal conditioning solutions. The 2255 f/I-f/f Converter is designed for industries that require precise frequency signal conversion. Its flexibility, reliability, and ease of use make it a valuable asset for engineers and automation professionals.
Order the PR Electronics 2255 Today!
Looking for a high-accuracy frequency-to-current or frequency converter? The PR Electronics 2255 f/I-f/f Converter delivers outstanding performance for signal conversion needs. Contact us today to learn more or place an order.
