- Single-phase/2-wire and 3-wire, three-phase/3-wire and 4-wire systems
- Fully configurable measured variables and parameters using the PC Configurator Software
- Modbus + Di/Do option
- 4 x analog outputs option
- DIN rail mounted
M-System model L53U converts a wide variety of variables in AC heavy-current power systems to transmit via Modbus for centralized logging purposes or to provide analog outputs for local display/trend/logging.
One model can be used for single-phase/2-wire and 3-wire, three-phase/3-wire and 4-wire systems. Users can freely choose and program major variables such like AC voltage/current, active/reactive power, power factor, AC frequency deviation, apparent power, active/reactive energy and up-to-the-31st harmonic distortions. Measured variables also include the maximum/minimum/ average values, in total of 500 types.
All measured variables can be transmitted to the host PC via RS-485/Modbus RTU. Conversion factors, system configuration, interval times are programmable using the PC Configurator Software locally or remotely. Measured values, counter values, setting data are stored in the non-volatile memory at the power off.
An open collector output can be used for energy count pulse or limit alarm trip. Pulse rate for energy count can be specified. The contact output can be simulated for testing the connected device.
External open collector input is typically used to reset energy count memory. The signal can be also monitored at the host system via Modbus, so that the host can start/stop monitoring according to ON/OFF status of a load (e.g. motor running or not).
Four analog output option (4-20 mA or 1-5 V) is also available instead of Modbus and Di/Do interface. Users can choose and program four among major variables, e.g. 1 VT plus 3 CT, to be converted into analog outputs, thus eliminating needs for four independent single function transducers.
The L53U is a DIN rail mounted version of the model 53U Multi Power Monitor, without LCD display. Both models are based on the same data setting and monitoring strategies thus easy to be mixed in single monitoring network, depending upon need for the display.