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RF251 — for hard industrial environments;
RF256 — sensors with a built-in display option for laboratory environments.
RF251 Series
- wide temperature range
- IP57
RF256 Series
- built display option;
- batteries powered.
Absolute Linear Position Sensors RF25x Series. Specification
| Model |
RF251-3
|
RF251-25
|
RF256-15
|
RF256-35
|
RF256-55
|
|
| Measurement range, mm |
3
|
25
|
15
|
35
|
55
|
|
| Accuracy (at Т=20 °С), um |
± 2
|
± 3
|
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| Resolution, um |
0,1 or 0,5 or 1 or 5 or 10
|
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| Output interface | digital |
RS422
|
(RS485 and SSI or RS232) and (EncD5 or EncD10 — emulation of quadrature signals of incremental transducers)
|
|||
| analog |
no
|
0...20 mА (<500 Om load) or 0...10 V
|
||||
| Synchronization input |
no
|
opto-isolated
|
||||
| Logical outputs |
no
|
two outputs, NPN: 100 mA max; 40 V max
|
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| Indication |
no
|
two-color LED (red/green)
|
||||
| Power supply, V |
12 (without analogue output) 15 (with analogue output)
|
|||||
| Power consumption, W |
0,75
|
|||||
| Enclosure rating |
IP57
|
IP50
|
||||
| Operating temperature, °С |
-40...+50
|
-10...+50
|
||||
| Weight (without cable), g |
70
|
110 |
110
|
150
|
180
|
|
Operation of the sensors is based on the principle of photoelectric scanning of special scale, connected with a measurement tip of the sensor. Radiation of a LED 1 is collimated by a lens 2 and is directed on a scale 3. The image of area of the scale is examined by CMOS array 4 and is analyzed by signal processor which calculates position of the scale.
As compared with incremental sensors, absolute sensors have a number of advantages: the absolute position of the gauge plug is determined immediately after power is on and the necessity of search of the reference mark is excluded.
Also excluded is the probability of accumulation or loss of count pulse signals in case of impacts, vibrations and reverse motion.
High precision contact measurements:
- Parts Dimensions
- Width Measurements
- Object/Target Displacements
- Runout
- Flatness
- Object Deformation
Absolute contact sensor RF25x
RF25Х-L-D-UART-EncDxAN-IN-LOUT-М
| Symbol | Description |
| X | Model (1 or 6) |
| L | Measurement range, mm |
| D | Resolution, um |
| UART | Type of the serial interface (RS232, 232 or RS485 and SSI, 485) |
| EncDx | Period of quadrature signal, EncD5 – 5 um, EncD10 – 10 um |
| AN* | Attribute showing the presence of Current Loop (I) or Voltage (U) output |
| IN | Trigger input (input of synchronization) (for RF256 sensors only) |
| LOUT* | Attribute showing the presence of 2 logical outputs |
| M | Cable length, m |
Note*: when working in the EncD mode using the SSI, as well as analog outputs is impossible. Parameters AN and LOUT - cannot be in the same device together.
Example: RF256-55-0.1-232-I-IN-СС-3, RF256 sensor; 55 mm measurement range; 0,1 um resolution; serial port – RS232; 4…20 mA analog output; IN – synchronization input presents; 3 m cable length.