EASTRON SDM630-Modbus V2 User Manual
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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. In order 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 avoid the trouble
to connect external CTs, giving the unit a cost-effective and easy operation. Built-in interfaces
provides 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 output indicates 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), its width is fixed at 100ms.
The default constant of configurable pulse output 1 is 400imp/kWh, default pulse width is
100ms.The configurable pulse output 1 can be set from the set-up menu.
