SITOP selectivity modules
Selectivity and fast fault location in 24-V DC load circuits
The SITOP selectivity and diagnostics modules are the optimal extension for all 24-V DC power supplies. They distribute and monitor the load current over several current circuits. Overloads and short circuits on a circuit are reliably recognized and the faulty 24-V DC load circuit reliably disconnected, while the other loads continue with absolutely no interruption; this prevents the complete failure of the plant.
- Reliable tripping, regardless of the cable lengths or cable cross-sections
- 4 or 8 24-V DC load feeders per module
- Alternative switch-off characteristics:
– Limiting – prevents short-term voltage drop to below 20 V
– Switching – can result in short-term voltage drop to below 20 V
- Diagnostics via common signaling contact or single channel signaling
- SEL1200/1400: 4 or 8 outputs, each with diagnostics of voltage, current, set threshold, reason for disconnection (if applicable)
- PSE200U: 4 outputs with voltage measuring point for current (1 V ? 1 A)
- Evaluation by free SIMATIC S7 function blocks for modules with single-channel signaling
SITOP inrush current limiters
Protection for your loads
As a ballast unit for SITOP power supplies, SITOP inrush current limiters reliably reduce inrush currents like those caused by the rectifier circuit on the input side with capacitor charging – as in the case of pulse-controlled power supplies. An inrush current limiter can also significantly extend the service life of the connected loads.
- Maximum service life of current-sensitive components like relays thanks to reduced current inrushes
- Space-saving, thanks to narrow width of only 18 mm
- Suitable for LOGO! modules and sub-distribution boards thanks to stepped profile
- Flexible installation on the DIN rail, on the wall or in various other locations
- Maximum plant configuration enabled
- Flexible application options at temperatures ranging from -40° Celsius to +70° Celsius
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