EASTRON SDM54 Series Smart Three Phase Energy Meter User Manual
- June 4, 2024
- EASTRON
Table of Contents
SDM54 series
Smart Three Phase Energy Meter
User Manual
2022 V1.0
Introduction
The SDM54 measures and displays the characteristics of single phase two wires
(1p2w) and three phases four wires(3p4w) supplies, including voltage,
frequency, current, power, power factor, active and reactive energy, imported
or exported.
Energy is measured in terms of kWh and kVArh. Maximum demand on power and
current can be measured over preset periods of up to 60 minutes. SDM54
supports max. 100A direct loads per phase, with dual tariff management
availability. The meter is designed for DIN-rail mounting, with IP51 front
protection. The meter is optionally equipped with pulse outputs, RS485 Modbus
port or M-bus port. Configuration can also be done via keypad, which is
password protected.
1.1 Unit Characteristics
The SDM54 Series are smart three-phase energy meters, covering 3 models with
the following features and differences:
| Model | Measurements | Outputs | Tariff Control |
|---|---|---|---|
| SDM54–2T | kWh, kVarh, W, Var, VA, PF, Hz, V, | 2x Pulse outputs; RS485 Modbus |
Double tariffs
SDM54-M| A Max.dmd. Etc.| 2x Pulse outputs; RS485 Modbus| Single tariff
SDM54-DI| kWh, kart, W, Var, VA, PF, Hz, V,| 2x Digital inputs; RS485 Modbus|
Single tariff
SDM54-MB-2T| A Max.dmd. Etc.| 2x Pulse outputs; M-Bus| Double tariffs
SDM54-MB| kWh, kart, W, Var, VA, PF, Hz, V,| 2x Pulse outputs; M-Bus| Single
tariff
SDM54-P| A Max.dmd. Etc.| 2x Pulse outputs| Single tariff
1.2 RS485 Serial–Modbus RTU
The RS485 serial port with Modbus RTU protocol provides a means of remotely
monitoring and controlling the unit. Set-up screens are provided for setting
up the RS485 port. D/LT645 protocol is optionally available on request.
1.3 M-Bus
The M-Bus port complying with EN13757-3 protocol provides a means of remotely
monitoring and controlling the meter. Set-up screens are provided for setting
up the M-Bus port.
1.4 Pulse outputs
Two pulse outputs that clock up the 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, the default pulse width is 100ms. The configurable pulse
output 1 can be set from the set-up menu.
1.5 Double Tariffs
The meter has double tariffs function for cost allocation management. There
are two terminals to monitor voltage input from external devices. Once there
are voltage detected within 230V (80~120%), the energy will be counted in
another register.
Start-up Screens
| The interface performs initial testing.
---|---
| The second screen indicates the software version.
| Meter serial number; Modbus ID; Baudrate info are provided.
After a short delay, the screen will display active energy measurements.
Measurements
3.1 Buttons
There are two buttons on the front panel.
| > Scroll the display for data-check.
Change option at Set-up mode
Exit the Set-up mode
---|---
| > Set-up mode entry
Confirmation
3.2 Measured parameters
Each successive pressing of the button shows different parameters measured:
| Total kWh
Import kWh
Export kWh
---|---
| Total kVarh
Import kVarh
Export kVarh
| (Available in SDM54-2T
only)
Tariff 1’s active energy
Total kWh
Import kWh
Export kWh
The “_” under T1 means
tariff 1 is running at the
moment.
| (Available in SDM54-2T
only)
Tariff 1’s reactive energy
Total kVarh
Import kVarh
Export kVarh
| (Available in SDM54-2T
only)
Tariff 2’s active energy
Total kWh
Import kWh
Export kWh
| (Available in SDM54-2T
only)
Tariff 2’s reactive energy
Total kVarh
Import kVarh
Export kVarh
| L1-N Voltage
L2-N Voltage
L3-N Voltage
| L1-2 Voltage
L2-3 Voltage
L3-1 Voltage
| Frequency
| L1 Current
L2 Current
L3 Current
| Neutral Current
| Total PF (Power Factor)
L1 PF
L2 PF
L3 PF
| Total PF (Power Factor)
| Max. Current Demand of
L1
L2
L3
| Max. Active Power
Demand of
L1
L2
L3
| Active Power
Reactive Power
Apparent Power
| Active Power of
L1
L2
L3
| Reactive Power of
L1
L2
L3
| Apparent Power of
L1
L2
L3
Set-up
Keep pressing the button, the meter will get into Set-up mode.
| Password is needed be checked before any further operation.
The default password is 1000.
---|---
| The left screen shows the set-up menu of the meter, including main,
communication, time, and pulse.
| System type: the network type where the meter is installed and working.
Options: 3P4W(default), 3P3W, 1P3W, 1P2W.
| Password: allows user to set a new password.
| Reset: to reset the max. Dmd / DI
DMD: information of current and active power
DI: digital input counts
| Com.: configure the communication parameters
| Address: communication MODBUS
Address, range from 001~247
| Baud: communication baudrate
Options: 2400~38400bps;
Default: 9600bps
| Parity: Communication Parity Options: None, Even, Odd Default: None
| Stop: Stop bit of communication Options: 1 or 2 Default: 1
| Time information setting
| Backlight: to set the backlight duration time after button operation.
Options: on, off, 5, 10, 15, 30, 60, 120 minutes.
Default: 60 minutes
| Scroll: automatic screen scroll time interval.
Options: off, 5,10,15, 30,60 seconds.
Default: off
| DMD: demand interval time Options: 0, 5, 8, 10, 15, 20, 30, 60 minutes.
Default: 60 minutes
| Pulse output 1 parameter setting
The meter pulse output 1 is configurable.
Note: Pulse output 2 is fixed to
| Type: the type of energy that pulse output is refer to.
Options: kWh; Imp-kWh; Exp-kWh kVarh;
Imp-kVarh; Exp-kVarh
Default: Exp-kWh
| Constant: Pulse output constant Options: 1000; 100; 10; 1
Default: 400
| Width: Pulse width
Options: 60,100,200mS
Default: 100mS
Connection Data| SDM54
---|---
Measurement connection| Screw connection
Conductor cross-section solid/stranded/AWG| 4-25mm2
Tightening torque| 2.5Nm
Other connections (COM and Pulse)| Screw connection
Conductor cross-section solid/ stranded/AWG| 0.5-1.5mm2
Tightening torque| 0.4Nm
Specifications
5.1 Electrical specifications
| • Power: | self-power supply (via measured voltage) |
|---|---|
| • Consumption: | <1W, 8VA |
| • Basic current: | 10A |
| • Max. current : | 100A |
| • Min. current: | 0.5A |
| • Starting current : | 0.02A |
| • Over-current: | 30 x Imax for 0.01s |
| • L-N voltage: | 100 to 289V a.c. (not for 3p3w |
| • L-L Voltage: | 173 to 500V a.c. (3p supplies only) |
| • Frequency: | 50Hz (MID version) 50/60Hz (non-MID version) |
| Accuracy active energy | Class 1(IEC62053-21)/Class B(EN50470-3) |
| Reactive energy | Class 2 (IEC62053-23) |
| 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 range maximum |
| Reactive power (VAr) | ±1% of range maximum |
| Apparent power (VA) | ±1% of range maximum |
5.2 Environmental specifications
| • Operating temperature | -25°C to +55°C |
|---|---|
| • Storage temperature | -30°C to +80°C |
| • Relative humidity | 0 to 90%, non-condensing @40°C |
| • Altitude | Up to 2000m |
| • Mechanical environment | M2 |
| • Electromagnetic environment | E2 |
5.3 Output specifications
Three interfaces are available:
- Modbus RS485 port output … (SDM54-M, SDM54-2T, SDM54-DI)
- M-Bus port output … (SDM54-MB, SDM54-MB-2T)
- two Pulse outputs
5.3.1 Modbus RS485 port output
| Baud rate: | 2400, 4800, 9600(default), 19200, 38400 |
|---|---|
| Parity: | none /odd/even |
| Stop bits: | 1 or 2 |
| RS485 address: | 001 to 247 |
| Response time: | <80mS |
| Transmission distance: | 1000m |
5.3.2 M-Bus port output
| Baud rate: | 300, 600, 1200, 2400, 4800, 9600 |
|---|---|
| Parity: | even/odd |
| Stop bits: | 1 or 2 |
| M-Bus primary address: | 001 to 250 |
| M-Bus Secondary address: | same as the serial number of the meter. |
5.3.3 Pulse Output
The unit provides two pulse outputs indicating real-time measured energy.
Pulse output 1 is configurable; Pulse output 2 is fixed with a constant
400imp/kWh.. Both pulse outputs are passive type.
Pulse output 1 is configurable. Default setting is exp-kWh; 100mS, constant
400imp/kWh
Pulse output 2 is non-configurable. It is fixed up with active kWh. The
constant is 400imp/kWh.
5.4 Safety and EMC
| • Measurement category | IEC 61010-1 CAT III |
|---|---|
| • Current input | Direct Connect |
| • Over-voltage category | CAT III |
| • Dielectric withstand | IEC 61010-1 double insulated |
| • Protective class | II |
| • EMC | IEC 61326-1:2013 ; IEC 61326- 2-3:2013 |
5.5 Mechanics specifications
| • DIN rail dimensions | 54x100x67.5mm(WxHxD) |
|---|---|
| • Mounting | DIN Rail 35mm |
| • Ingress protection | IP51 front panel (indoor) |
| • Material | Self-extinguishing UL94 V-0 |
| • Weight | 265g |
Warnings
Important Safety Information is contained in the Maintenance section.
Familiarize yourself with this information before attempting installation or
other procedures. Symbols used in this document:
Risk of Danger: These instructions contain important safety information.
Read them before starting installation or servicing of the equipment.
Caution: Risk of Electric Shock
Dimensions
Wiring diagram
- Three Phase Four Wires:
- Single Phase Two Wires:
- Other terminals
EU Declaration of Conformity
EU Declaration of Conformity
We, Zhejiang Eastron Electronic Co LTD
No.1369, Chengnan Rd. Jiaxing, Zhejiang, 314001, China
Ensure and declare that electricity meter types:
SDM54-2T
SDM54M
SDM54-DI
SDM54-MB-2T
SDM54-MB
SDM54-P
with the measurement range
1. 3 x 230/400V 50Hz, 0.5-10(100)A 400imp/ kWh.
Are in conformity with the type as described in the EU-type examination
certificate 0120/ SGS0533
The fulfillment of the essential requirements set out in Annex I and in the
relevant instrument-specific Annexes have been demonstrated.
The electricity meter types described above are in conformity with the
relevant Union harmonization legislation and satisfy the appropriate
requirements of the Directive
2014/32/EU with the following standards:
EN50470-1:2006, Electricity metering equipment (AC) part 1: General
requirements, tests and test conditions. Metering equipment (class indexes A,
B and C)
EN50470-3:2006, Electricity metering equipment (AC) Part 3: Particular
requirements static meters for active energy (class indexes A, B and C)
This Declaration of Conformity is issued under the sole responsibility of the
manufacturer.
Signed on behalf of Zhejiang Eastron Electronic Co., LTD.
MID certificate
CONTACT US
If you have any questions, please feel
free to contact our sales team. Zhejiang
Eastern Electronic Co., Ltd.
No.1369, Chengnan Rd. Jiaxing, Zhejiang, 314001, China
Tel: +86-573-83698881
Fax: +86-573-83698883
Email: sales@eastrongroup.com
www.eastrongroup.com