EASTRON SDM630 Modbus V2 DIN Rail Smart Meter Single User Manual

EASTRON SDM630 Modbus V2 DIN Rail Smart Meter Single

• Measures kWh Kvarh, KW, Kvar, KVA, P, F, PF, Hz, DMD, V, A, etc.
• Bi-directional measurement IMP & EXP
• Two pulse outputs
• RS485 Modbus
• Din rail mounting 35mm
• 100A direct connection
• Better than Class 1 / B accuracy

Introduction

• The SDM630-Modbus V2 measures and displays the characteristics of single-phase two wires (1p2w), three-phase three wires (3p3w,) and 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.
• To measure energy, the unit requires voltage and current inputs in addition to the supply required to power the product.
• SDM630-Modbus V2 supports max. 100A direct connection saves the cost and avoids the trouble of connecting external CTs, giving the unit a cost-effective and easy operation.
• Built-in interfaces provide pulse and RS485 Modbus RTU outputs. Configuration is password protected.

Unit Characteristics

The Unit can measure and display:

• Line voltage and THD% (total harmonic distortion) of all phases
• Line Frequency
• Currents, Current demands, and current THD% of all phases
• Power, maximum power demand, and power factor
• Active energy imported and exported
• Reactive energy imported and exported

The unit has password-protected set-up screens for:

• Changing password
• Supply system selection 1p2w, 3p3w,3p4w
• Demand Interval Time(DIT)
• Reset for demand measurements
• Pulse output duration
• Two pulse outputs indicate real-time energy measurement. An RS485 output allows remote monitoring from another display or a computer.

RS485 Serial–Modbus RTU

• This uses an RS485 serial port with Modbus RTU protocol to provide a means of remotely monitoring and controlling the Unit
• Set-up screens are provided for setting up the RS485 port.

Pulse output

• This provides two pulse outputs that clock up measured active and reactive energy. The constant of pulse output 2 for active energy is 400imp/kWh (unconfigurable), and its width is fixed at 100ms.
• The default constant of configurable pulse output 1 is 400imp/kWh, the default pulse width is 100ms. The configurable pulse output 1 can be set from the set-up menu.

Start-up Screens

After a short delay, the screen will display active energy measurements.

Measurements

The buttons operate as follows:

Voltage and Current

Each successive pressing of the button selects a new range:

Frequency and Power Factor and Demand

Each successive pressing of the button selects a new range:

Power

Each successive pressing of the button select a new range:

Energy Measurements

Each successive pressing of the button selects a new range:

Set-up

To enter set-up mode, press the button for 3 seconds, until the password screen appears.

• Setting up is password-protected so you must enter the correct password (default ‘1000’) before processing. If an incorrect password is entered, the display will show: Err
• To exit the setting-up mode, press repeatedly until the measurement screen is restored.

Set-up Entry Methods

Some menu items, such as passwords, require a four-digit number entry while others, such as supply system, require selection from several menu options.

Menu Option Selection

1. Use the buttons to select the required item from the menu. Selection does not roll over between the bottom and top of the list

2. Press to confirm your selection

3. If an item flashes, then it can be adjusted by the buttons . If not, there may be a further layer.

4. Having selected an option from the current layer, press  to confirm your selection.
   The SET indicator will appear.

5. Having completed a parameter setting, press to return to a higher menu level. The SET indicator will be removed and you will be able to use the buttons for further menu selection.

6. On completion of all set-up, press repeatedly until the measurement screen is restored.

Number Entry Procedure

When setting up the unit, some screens require the entering of a number. In particular, on entry to the setting up section, a password must be entered. Digits are set individually, from left to right.

The procedure is as follows:

1. The current digit to be set flashes and is set using the buttons
2. Press to confirm each digit setting. The SET indicator appears after the last digit has been set.
3. After setting the last digit, press to exit the number-setting routine. The SET indicator will be removed.

Change password

Press to exit the number setting routine and return to the Set-up menu. SET will be removed

DIT Demand Integration Time

This sets the period in minutes over which the current and power readings are integrated for maximum demand measurement. The options are: 0, 5, 8, 10, 15, 20, 30, 60 minutes

Backlit set-up

Supply System

Use this section to set the type of power supply being monitored.

Pulse output

• This option allows you to configure the pulse output 1. The output can be set to provide a pulse for a defined amount of energy active or reactive.

Use this section to set up the pulse output for:

• Total kWh/ Total kVArh
• Import kWh/Export kWh
• Import KVArh/Export KVArh

Pulse rate

Use this to set the energy represented by each pulse. The rate can be set to 1 pulse per dFt/0.01/0.1/1/10/100kWh/kVArh.

Pulse Duration

The energy monitored can be active or reactive and the pulse width can be selected as 200, 100(default), or 60ms.

(It shows pulse width of 200ms)

Communication

• There is an RS485 port that can be used for communication using the Modbus RTU protocol. For Modbus
• RTU, parameters are selected from the Front panel.

RS485 Address

Baud Rate

to return to the main setup menu.

Parity

Stop bits

Note: Default is 1, and only when the parity is NONE that the stop bit can be changed to 2.
CLR
The meter provides a function to reset the maximum demand value of current and power.

Specifications

Measured Parameters

• The unit can monitor and display the following parameters of a single phase two wire(1p2w), three phase three wire(3p3w), or four phase four wire(3p4w) supply.

Voltage and Current

• Phase to neutral voltages 100 to 289V a.c. (not for 3p3w supplies)
• Voltages between phases 173 to 500V a.c. (3p supplies only)
• Basic current (Ib): 10A
• Max current: 100A
• Min. Current: 5% of Ib
• Starting current: 0.4% of Ib
• Percentage total voltage harmonic distortion (THD%) for each phase to N ( not for 3p3w supplies)
• Percentage voltage THD% between phases (three-phase supplies only)
• Current THD% for each phase

Power factor and Frequency and Max. Demand

• Frequency in Hz

Instantaneous power:

• Power 0 to 99999 W
• Reactive Power 0 to 99999 VAr
• Volt-amps 0 to 99999 VA
• Maximum demanded power since last Demand reset Power factor
• Maximum neutral demand current, since the last Demand reset (for 3p4w supply only)

Energy Measurements

• Imported active energy 0 to 999999.99 kWh
• Exported active energy 0 to 999999.99 kWh
• Imported reactive energy 0 to 999999.99 kVArh
• Exported reactive energy 0 to 999999.99 kVArh
• Total active energy 0 to 999999.99 kWh
• Total reactive energy 0 to 999999.99 kVArh

Measured Inputs

• Voltage inputs through a 4-way fixed connector with 25mm² stranded wire capacity. single phase two wire(1p2w), three phase three wire(3p3w) or four phase four wire(3p4w) unbalanced. Line frequency is measured from L1 voltage or L3 voltage.

Accuracy

• Voltage 0·5% of range maximum
• Current 0·5% of nominal
• Frequency 0·2% of mid-frequency
• Power factor 1% of unity (0.01)
• Active power (W) ±1% of the range maximum
• Reactive power (VAr) ±2% of range maximum
• Apparent power (VA) ±1% of the range maximum
• Active energy (Wh) Class 1 IEC 62053-21
• Reactive energy (VARh) ±2% of range maximum
• Total harmonic distortion 1% up to 19st harmonic
• Temperature co-efficient Voltage and current = 0.013%/°C typical
• Active energy = 0·018%/°C, typical
• Response time to step input 1s, typical, to >99% of final reading, at 50 Hz.

Interfaces for External Monitoring

Three interfaces are provided:

• an RS485 communication channel that can be programmed for Modbus RTU protocol
• and Pulse output(Pulse 1) indicating real-time measured energy. (configurable)
• an Pulse output(Pulse 2) 400imp/kWh
• 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 = 10 kWh/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 2400, 4800, 9600, 19200, 38400
• Parity none (default)/odd/even
• Stop bits 1 or 2
• RS485 network address on – 3-digit number, 001 to 247
• Modbus™ Word order Hi/Lo byte order is set automatically to normal or reverse. It cannot be configured from the set-up menu.

Reference Conditions of Influence Quantities

• Influence Quantities are variables that affect measurement errors to a minor degree.
• Accuracy is verified under the nominal value (within the specified tolerance) of these conditions.
• Ambient temperature 23°C ±2°C
• Input frequency 50Hz ±2%
• Input waveform Sinusoidal (distortion factor < 0·005)
• Magnetic field of external origin Terrestrial flux

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 10s
• Vibration 10Hz to 50Hz, IEC 60068-2-6, 2g

Dimensions

Wiring diagram

• Three Phase Three Wires
• Three Phase Four Wires
• Single Phase Two Wires
• Address: No.1369 Chengnan Road, Jiaxing, Zhejiang, 314001, China
• Tel: 0086-573-83698881/83698882 Fax: 0086-573-83698883 Web:www.eastron.com.cn

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