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2255
f/I-f/f converter
- Programmable f/I converter
- Programmable decimal divider / decimal multiplier
- Programmable frequency generator
- Relay output as option
- Supply voltage 24 VDC
Advanced features
- The user programmable version has a multifunction user interface consisting of three pushbuttons and a 3-digit LED displays.
Application
- 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.
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 A |
| 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 |