The output voltage is adjustable up to 28 V in order to compensate for voltage drops on long lines. The extremely flat design and low heat development of the power supplies allow space-saving mounting in distribution boards. They also have an extended ambient temperature range from -30 to +70 °C and an efficiency of up to 90%, which keeps heat development down. On account of the automatic switchover of the input voltage (85-132/170-264 V AC) and comprehensive certifications, the power supplies can be used all over the world. Large power reserves of 1.5 times the rated current for "extra power" for 5 s/min ensure trouble-free switching of loads with a high inrush current and reliable operation. The on/off switch for the 24 volts allows the floating exchange of the distributed I/O modules. Plug-in terminals allow three separate load circuits to be disconnected and so simplify commissioning and maintenance of the system. The current monitor outputs the present output current as a voltage value, and can be wired to an analog input. In this case, 1 V corresponds to the rated current of the power supply, that is 5 A or 10 A. The measurement allows users not only to diagnose the load current at any time and detect faults through an increased current requirement, but also to optimize the energy management.
For further information on Siemens at the SPS IPC Drives 2017, please seewww.siemens.com/sps-ipc-drives
For further information on Sitop, please see www.siemens.com/sitop