• Document: User Manual V1.1. SDM120-Modbus(mV) Single-Phase Multifunction DIN rail Meter
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B+G e-tech & Eastron SDM120-Modbus(mV) User Manual SDM120-Modbus(mV) Single-Phase Multifunction DIN rail Meter  Measures kWh, Kvarh, KW, Kvar, KVA, PF, Hz, dmd, V, A, etc.  Di-directional measurement IMP & EXP  Two pulse outputs  RS485 Modbus  Din rail mounting 17.5mm  0.1VAC direct connection  Better than Class 1 accuracy User Manual V1.1 2015 B+G e-tech & Eastron SDM120-Modbus(mV) User Manual Application The energy-meters “with a blue back-lighted LCD screen for prefect reading” are used to measure single-phase like residential, utility and Industrial application. The unit measures and displays various important electrical parameters, and provide a RS485 communication port for remote reading and monitoring. Bi-directional energy measurement makes the unit a good choice for solar PV energy metering. The compact design and din rail installation provides a easy and economical solution for your metering demand. General Specifications Voltage AC (Un) 230V Voltage Range 176~276V AC Base Current (Ib) 0.1VAC Power consumption <2W/10VA Frequency 50/ 60Hz(±10%) AC voltage withstand 4KV for 1 minute Impulse voltage withstand 6KV-1.2uS wavform Overcurrent withstand 30Imax for 0.01s Pulse output rate 1000imp/kWh (default) 100/10/1 imp/kWh/kVarh (configurable) Display LCD with blue backlit Max. Reading 99999.9kWh Accuracy Voltage 0.5% of range maximum Current 0.5% of nominal Frequency 0.2% of mid-frequency Power factor 1% of Unity Active power 1% of range maximum Reactive power 1% of range maximum Apparent power 1% of range maximum Active energy Class 1 IEC62053-21 Class B EN50470-3 Reactive energy 1% of range maximum B+G e-tech & Eastron SDM120-Modbus(mV) User Manual Environment Operating temperature -25℃ to +55℃ Storage and transportation temperature -40℃ to +70℃ Reference temperature 23℃±2℃ Relative humidity 0 to 95%, non-condensing Altitude up to 2500m Warm up time 10s Installation category CAT II Mechanical Environment M1 Electromagnetic environment E2 Degree of pollution 2 Output Pulse Output The meter provides two pulse outputs. Both pulse outputs are passive type. Pulse output 1 is configurable. The pulse output can be set to generate pulses to represent total / import/export kWh or kVarh. The pulse constant can be set to generate 1 pulse per: 0.001(default) /0.01/0.1/1kWh/kVarh. Pulse width: 200/100/60ms Pulse output 2 is non-configurable. It is fixed up with total kWh. The constant is 1000imp/kWh. RS485 output for Modbus RTU The meter provides a RS485 port for remote communication. Modbus RTU is the protocol applied. For Modbus RTU, the following RS485 communication parameters can be configured from the Set-up menu. Baud rate: 1200, 2400, 4800, 9600 Parity: NONE/EVEN/ODD Stop bits: 1 or 2 Modbus Address: 1 to 247 Mechanics Din rail dimensions 17.5x119x62 (WxHxD) DIN 43880 Mounting DIN rail 35mm Sealing IP51 (indoor) Material self-extinguishing UL94V-0 B+G e-tech & Eastron SDM120-Modbus(mV) User Manual Initialization Display When it is powered on, the meter will initialize and do self-checking. 1 Full Screen It will last for 3 seconds. 2 Software version It will last for 3 seconds. After the self-checking program, the meter display will show the total active energy (kWh) Scroll Display by button There is a button on the front of the meter. After initialization and self-checking program, the meter display the measured values. The default page is total kWh. If the user wants to check other information, he needs to press the scroll button on the front panel. Click the button, the LCD display will scroll the measurements. Keep pressing the button for 3 seconds, the meter will get into set-up mode. 1 Total act

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