Siemens 6EP1961-2BA21 SITOP PSE200U 10 A Selectivity module 4-channel input: 24 V DC/40 A output: 24 V DC/4x 10 A Level adjustable 3-10 A with common signaling contact. The SITOP PSE200U and SITOP SEL1200/SEL1400 selectivity modules are the optimal expansion for all 24 V power supplies in order to distribute the load current across multiple feeders and monitor it. Overload and short-circuit in one or more feeders is reliably detected and signaled.
Siemens 6EP1961-2BA21 SITOP PSE200U Selectivity module
Siemens 6EP19612BA21 SITOP PSE200U Selectivity module
Siemens SITOP selectivity modules
The electronics permit brief current peaks caused, for example, by high inrush currents, but disconnect feeders in the event of an extended overload. This is ensured even on high-resistance lines and in the case of “creeping” short-circuits. In such cases, miniature circuit breakers fail to trip, or trip too late, even if the power supply unit could deliver the required tripping current. The SITOP expansion module continues to supply the intact feeders with 24 V, without any interruption and totally reaction-free – features which avoid a potential total system failure.
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