Siemens SIMEAS R-PMU, Manual, Page: 31 / 296

4
4.7 Voltage Supply
31
Digital Fault Recorder, SIMEAS R-PMU, Manual
E50417-H1076-C360-A5, Release 10.2012
4.7 Voltage Supply
One of the following two power supply units is used for the voltage supply of the SIMEAS R-
PMU:
‰
Direct voltage in the range between DC 24 V and DC 60 V
‰
Direct voltage in the range between DC 110 V and DC 250 V and alternating voltage in the
range between AC 115 V and AC 230 V
Storage capacitors
Storage capacitors ensure that operation is continued for at least one second in the event of a
voltage failure. Thus the system can be shut down in a controlled manner.
Battery-buffered voltage supply
The power supply unit can be optionally equipped with a battery package. This allows for oper-
ation of at least ten minutes without external voltage supply.
The battery package is charged automatically and is subject to an automatic weekly load test. A
faulty battery package is detected and reported by this self-monitoring function.
Note
The use of the battery-buffered voltage supply is recommended if the device is subject to unsta-
ble voltage supply conditions.