Supply PSM340 SRTU510 reliable quality, the National Hot 
 DPM420 DPM430 EPM420 EPM450 
 EPM420A EPM420E EPM4200 PSM330 
 PSM340 SRTU510 SRTU510P16 SRTU5308 
 SRTU540 SPM6014 


 DPM420: measure voltage, current, active power, reactive power, power factor, frequency, active power and reactive power degree, and digital input output (8DI/3DO), standard RS485 communication interface, MODBUS-RTU communication protocol, Size 161X161 (mm); 0.2% 0.5% (DPM420S) 

 DPM430: DPM420 function with automatic meter reading, unusual records and record the maximum and minimum, standard RS485 communication interface, MODBUS-RTU communication protocol, size 161X161 (mm); 0.2% 0.5% (DPM430S) 

 EPM420; simultaneously measure and display three phase voltage, current, active power, reactive power, apparent power, power factor, frequency, active power and reactive power, precision 0.5%, standard RS485 communication interface, MODBUS-RTU Communication agreement, size 144X144 (mm) 

 EPM450: internal measurements to 31 harmonics. The remaining functions with EPM420; 

 EPM420A: simultaneously measuring and displaying voltage, line voltage, the phase current, neutral current frequency, active power, reactive power, power factor, active power, reactive power degree, the amount of the current to the system, the system the amount of power required, the maximum current Demand, the maximum amount of power required, RS485, MODBUS-RTU communication, accuracy of 0.5%, size 109x109 (mm). 

 EPM420E: simultaneously measuring and displaying voltage, current, frequency, power, power factor, energy, the amount of the current to the system, the system the amount of power required, the maximum amount of current required, the maximum amount of power required, RS485, MODBUS-RTU communication, accuracy 0.5% , size 96x96 (mm). 

 EPM4200: simultaneous measurement and display the phase line, each with high / low, average high / low voltage; each phase, each phase high / low, average high / low current, frequency, active power, reactive power, power factor, total apparent power; each phase and the average phase angle; active, reactive, apparent electrical degrees; Demand; maximum amount of amps to be more than 100 power parameters; accuracy of 0.5%,, RS485, MODBUS-RTU communication, especially the big screen bright LCD display, size 96x96 (mm). 

 PSM330: simultaneous measurement of three-phase voltage and current display, standard RS485 communication interface, MODBUS-RTU protocol 

 PSM340: simultaneous measurement and display the six single-phase current, standard RS485 communication interface, MODBUS-RTU protocol 

 SRTU510: 16 Lu Yao letter (switch) inputs, 6 relay remote control output, standard RS485 communication interface, MODBUS-RTU communication protocol 

 SRTU510P: 16 Lu Yao letter (switch) input (8-pulse count input) and 6-channel remote control relay outputs, RS485, MODBUS-RTU communication protocol 

 SRTU530: 8 Lu Yao letter (switch) input, 8 analog (0-5V or 4-20mA) input and output 6-channel remote control relay, standard RS485 communication interface, MODBUS-RTU communication protocol 

 SRTU540: 32 Lu Yao letter (switch) input, with the SOE function, RS485, MODBUS-RTU communication protocol 

 SPM60: 14 AC input, monitor loop two-phase system, the measurement parameters: phase / line current, neutral current, phase / line voltage, active power, reactive power, power factor, power, frequency, phase sequence and harmonic wave component, waveform recording: automatic recording trigger waveform data before and after 5 weeks, 2 DC inputs, 8 optically isolated digital inputs (SOE), 8 relay outputs (SBO), 2 way RS-232 communication port work , 1 RS-232 communication port maintenance, support synchronous or asynchronous communication, support for multiple protocols such as MODBUS