The SDM530-Mbus measures and displays the characteristics of three phase four wires (3p4w) supplies, including voltage, frequency, current, power, active and reactive energy, imported or exported. Energy is measured in terms of kWh, kVArh.

Maximum demand current can be measured over preset periods of up to 60 minutes. In order to measure energy, the unit requires voltage and current inputs in addition to the supply required to power the product. SDM530-Mbus supports max. 100A direct connection, saves the cost and avoid the trouble to connect external CTs, giving the unit a cost-effective and easy operation. Built-in interfaces provides pulse and Mbus outputs. Configuration is password protected.

Accuracy
• Voltage: 0-5% of range maximum
• Current: 0-5% of nominal
• Voltage: 0-5% of range maximum
• Frequency                           0·2% of mid-frequency
• Power factor                        1% of unity (0.01)
• Active power (W)                 ±1% of range maximum
• Reactive power (VAr)            ±1% of range maximum
• Apparent power (VA)            ±1% of range maximum
• Active energy (Wh)              Class 1 IEC 62053-21
• Reactive energy (VARh)        ±1% of range maximum
 

Interfaces for External Monitoring Three interfaces are provided:
• an RS485 communication channel that can be programmed via protocol remotely.
• an Pulse output(Pulse 1) indicating real-time measured energy.(configurable)
• an Pulse output(Pulse 2) 
The modbus configuration (Baud rate etc.) and the pulse output assignments (kW/kVArh, import/export etc.) are configured through the Set-up screens.

Pulse Output The unit 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: 
• DFt=2.5 Wh/VArh
• 0.01 = 10 Wh/VArh
• 0.1 = 100 Wh/VArh
• 1 = 1 kWh/kVArh
• 10=10Wh/kVArh
• 100 = 100 kWh/kVArh

Pulse width: 200/100/60ms
Pulse output 2 is non-configurable. It is fixed up with active kWh. The constant is 400imp/kWh.

RS485 Output for Modbus RTU For Modbus RTU, the following RS485 communication parameters can be configured from the Set-up menu: Baud rate 1200, 2400, 4800, 9600 Parity none (default)/odd/even Stop bits 1 or 2 RS485 network address nnn – 3-digit number, 001 to 247 Environment

• Operating temperature            -25°C to +55°C*
• Storage temperature              -40°C to +70°C*
• Relative humidity                  0 to 90%, non-condensing
• Altitude                              Up to 2000m
• Warm up time                     1 minute
• Vibration                            10Hz to 50Hz, IEC 60068-2-6, 2g

MBus Output for EN_13757-3 For MBus EN13757-3, the following MBus communication parameters can be configured from the Set-up menu: Baud rate 300, 600, 1200, 2400, 4800, 9600 Parity none (default)/odd/even Stop bits 1 or 2 MBus network primary address nnn – 3-digit number, 001 to 250 MBus network secondary address 00 00 00 01 to 99 99 99 99(The secondary address can not be setted directly on meter, but can be done via Mbus communication)