LAB24
LAB24
Current limiter for 4-20mA loop signal
Application:
Protection of power supplies and input boards for acquisition systems operating on 0–20 or 4–20 mA current loops.
The LAB24 acts like an electronic fuse placed in series with the loop power supply. Virtually transparent under normal operation, it instantly limits the loop current to 24 mA in the event of an overcurrent, then becomes transparent again once the fault has cleared.
Installing the LAB24 adds new functions to your system such as:
- protection against short circuits in case of wiring errors;
- remote testing of the power line by shorting the two conductors (current limited to 24 mA);
- protection against full-scale overruns on connected sensors (e.g., full-scale exceedance on a level sensor during flooding, etc.)
Mechanical characteristics:
| Enclosure body: | Beige polyamide. |
| Dimensions: | Width: 20 mm; Height: 60 mm; Depth: 63 mm |
| Weight: | Approx. 35 grams |
| Mounting: | Universal foot for asymmetric DIN EN-50035 rail or Omega rail DIN EN50022 |
| Wiring: | 4 x screw terminals (front-facing) |
Electrical characteristics:
| Power input: |
DC voltage from 8 to 30 VDC. Protected against polarity reversal |
| Line output: | DC voltage equal to the input supply voltage minus internal voltage drop. Protected against overvoltage and overcurrent. Common potential between negative input and negative output |
| Voltage drop: |
Typical 250 mV at 20 mA (variable during current limitation) |
| Consumption: | Typical 3 mA |
| Output current: | 0 to 24 mA (limited to 24 mA in case of a short circuit, even permanent) |
| Control indicator: | Yellow LED on front panel |
