UMG 507 E Power Meter
The three-phase electronic measuring instrument collects and digitalises the effective values of currents and voltages (True RMS) in a 50/60Hz network. The integrated microprocessor calculates the electrical parameters from the sampling values. All measurement values are continuously measured and recorded at intervals of 200ms over 10 periods (50 Hz).
This allows the safe identification of short-term interruptions with the fault recorder function. For short-term events, the effective values are recorded over 128 periods with 64 pre-trigger periods and with the transient memory over 5 periods with 2 pre-trigger periods. The reaction time of the internal outputs is < 10ms and the external bus outputs < 200ms.
RS 232 Modbus RTU, data rate: 38,4 kBit/s
RS 485 Modbus RTU slave, Modbus RTU master/gateway
data rates: 9,6, 19,2, 38,4, 57,6 and 115,2 kBit/s
Profibus DP V0, transmission rates: 9.6, 19.2, 93.75, 187.5, 500 k and 1.5 Mbit/s
Modbus RTU master function
The RS 485 of the UMG 507 can also be used as a Modbus RTU master. This means that any measurement instrument from Janitza electronicsÂŪ with RS 485, protocol Modbus RTU can be connected to the RS 485 of the UMG 507 and, in full functionality, can be illustrated on the Ethernet TCP/IP for example.
In addition, the instrument inputs and outputs can be decentrally expanded using the WAGO module. For the Modbus data of other bus users, a minimum of 32 and a maximum of 64 three Modbus data points are available such as in the topology view of the PSW professional.
Digital inputs and outputs
Depending upon the product variant, the UMG 507 has a large number of internal digital and analogue inputs and outputs (refer to design versions). The top versions of the UMG 507 (AD, P, E and EP) have six digital inputs, six digital outputs, two analogue outputs (0/4-20mA), a temperature input and an analogue input (0/4-20mA). The digital inputs can be used as pulse inputs, synchronisation inputs or signal inputs. The digital outputs can be defined as limit value outputs, pulse outputs, Emax outputs (option), time switch outputs or logic outputs.
Both analogue outputs can be applied as measurement value transducers or for analogue control of generators (0-20mA) in the Emax function (option). Transformer temperature data can be collected using the temperature input. Any process signals can be allocated to the analogue input.
The 128 programmable logic links provide connections between inputs and outputs, measurement values and internal functions of the UMG 507. The standard operators AND, NAND, OR, XOR, EQU, rising edge and falling edge are available. The events are allocated to free flags which can also be linked with other flags. The incoming information through the Modbus RTU or the Profibus can also be incorporated in the logic links.
Trigger events, the virtual weekly time switch channels and Emax channels, the limit value comparator and signals received through the field bus are available as operands. These flags can then prompt the switchover of digital outputs, tariff changes, measurement value synchronisation, the time setting or the despatch of an e-mail. Measurement values can also be added, subtracted, multiplied or divided.
Data collection and recording
The UMG 507 has an internal memory of 256 KB RAM and, depending on the version, an additional memory of 16 MB flash is available for continuous recording of the measured data. This measurement value memory can be freely configured with reference to the measurement values which are to be saved and the recording intervals. In addition, the highest and lowest actual values (200 ms average time) can also be saved within these intervals. The recording of events is prompted by triggers. Events such as excess currents, under voltage or overvoltage can be safely collected from a half period duration. Events are recorded over 128 periods as effective value recorders.