MyMeters MM-SDM630-2C User Manual

MM-SDM630-2C
Multi-Channel DIN Rail Smart Energy Meter
DIN RAIL SMART METER
FOR SINGLE AND THREE PHASE
ELECTRICAL SYSTEMS
USER MANUAL V4.1

1. Introduction

MM-SDM630-2C measures and displays the characteristics of
two three phase four wires circuits or 6 single phase circuits,
including voltage, frequency, current, power and 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. The requisite current input(s) are obtained via
current transformers (CT).
This meter can be configured to work with a wide range
of CTs, giving the unit a wide range of operation. Built-in
interfaces provide pulse and RS485 Modbus RTU outputs.
Configuration is password protected.
1.1 Unit Characteristics
The Unit can measure and display electronic information of
multi-channels:
• L-N 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 1phase2wire, 3phase 4wires
• CT Ratio (1 to9999 )
• PT ratio (1 to 9999)
• Demand Interval time
• Reset for demand measurements
• Pulse output duration
A pulse output indicates real-time energy measurement. An
RS485 output allows remote
monitoring from another display or a computer.
1.2 Current Transformer Primary Current
The unit can be configured to operate with CT ratio between
Primary Current and Secondary Current. The secondary CT
has two options: 1A / 5A

1.3 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.

1.4 Pulse Output

This provides 2 pulse outputs referring the energy consump-
tion of two circuits. Both pulse outputs are configurable.
The pulse width for active energy can be set from the Set-up
menu.

2. Start Up Screens

The first screen lights all
display segments and can be
used as a display check.
The second screen
indicates the firmware
installed in the unit and its
build number.
Next the unit performs a
self-test and indicates if the
test passes.
After a short delay, the screen will display active energy
measurements.

3. Measurements

The MM-SDM630-2C measures all important electrical
parameters, which is shown on the LCD display and approach-
able via RS485. On the front panel there are four sensitive
buttons and four LED indicators.
The buttons operate as follows:
Selects the Voltage and Current display
screens In Set-up Mode, this is the
"Left" or "Back" button.
Select the Frequency and Power factor
display screens In Set-up Mode, this is
the "Up" button.
Select the Power display screens
In Set-up Mode, this is the "Down"
button.
Select the Energy display screens
In Set-up mode, this is the "Enter" or
"Right" button.
There are four LED indicators on the front panel , namely C1,
C2, Pulse1 and Pulse2. The unit can measures and displays data
of two three phase circuits: C1 circuit and C2 circuit. If C1
LED shows, that means the reading on the LCD are for C1
circuit. While C2 is there, it means the measurements on the
LCD are for C2 circuit.
The default display after the meter is power on, the LCD
show "C1" circuit information.The way to shift "C1" circuit
information to "C2" circuit information is by pressing the
"Down" button .
If the meter are showing "C2", and the user want to shift
it to be "C1" circuit, then he shall keep pressing the "UP"
button .
(Circuit 1)
(Circuit 2)

3.1 Voltage and Current

Each successive pressing of the button selects a
new range:
Phase to neutral voltages
Current on each phase
Phase to neutral voltage
THD%
Current THD% for each
phase
3.2 Frequency and Power Factor and
Demand
Each successive pressing of the button selects a
new range:
Frequency
Power factor (total)
Power factor of each phase
Max. Power demand
Max. Current demand

3.3 Power

Each successive pressing of the button selects a
new range:
Instantaneous active power
(kW)
Instantaneous reactive
power (kVAr)
Instantaneous Volt-amps
(KVA)
Total kW, kVAr, kVA

3.4 Energy Measurements

Each successive pressing of the button selects a
new range:
Total active energy in kWh
C1-L1 kwh
C1-L2 kwh
C1-L3 kwh
Imported active energy
in kWh
Exported active energy
in kWh
Total reactive energy
in kVAh
C1-L1 kVarh
C1-L2 kVarh
C1-L3 kVarh
Imported reactive energy
in kVArh
Exported reactive energy
in kVArh

4. Setting Up

To enter set-up mode, pressing 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: PASS Err
To exit setting-up mode, press repeatedly until the
measurement screen is restored.
4.1 Set-up Menu Structure

Change password

nnnn 4-digit number-default '1000'
CT Set the value of the CT ratio
nnnn 4-digit number 0001~9999.v
PT set the value of PT Ratio
nnnn 4-digit number 0001~9999.
DIT Demand Integration Time
This is the period in minutes over which the current and
power readings are integrated for maximum demand mea-
surement. Options are: 5 , 10, 15, 30 and 60minutes.
4.2 Set-up Entry Methods
Some menu items, such as password and CT, require a
four-digit number entry while others, such as supply system,
require selection from a number of menu options.
4.2.1 Menu Option Selection
1) Use the and buttons to select the
required item from the menu shown in section 4.1. Selection
does not roll over between bottom and top of list.
2) Press to confirm your selection
3) If an item flashes, then it can be adjusted by the
buttons. If not, there maybe 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
return to a higher menu level. The SET indicator will be
removed and you will be able to use
buttons for further menu selection.
6) On completion of all setting-up, press
until the measurement screen is restored.
4.2.2 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
and 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
ber setting routine. The SET indicator will be removed.
4.3 Change Password
Use
choose the change
password option.
Press
change password routine.
The new password screen
will appear with the first
digit flashing.
Use
the first digit and press
selection. The next digit
will flash.
Repeat the procedure for
the remaining three digits
After setting the last digit,
SET will show.
Press to exit the number setting routine and return
to the Set-up menu. SET will be removed.
4.4 DIT Demand Integration Time
This sets the period in minutes over which the current and
power readings are integrated for maximum demand mea-
surement.The options are: 5, 10,15 30,60 minutes.
From the set-up menu, use
and
to select the dIT option.
The screen will show the
currently selected integra-
tion time.
Press
the selection routine. The
current time interval
will flash.
Use
buttons to select the time
required.
Press
selection. SET indicator
will appear.
Press to exit the DIT selection routine and return
to the menu.

4.5 CT

The CT option sets the current ratio (1~9999) and secondary
current (CT2 1A/5A) of the current transformer (CT) that
wires to the meter.
From the Set-up menu, use
and
to select the CT option.
The screen will show the
current CT primary current
value.
C1.CT2 -> Circuit 1
C2.CT2 -> Circuit 2
Secondary CT setting
Press
the CT secondary current
selection routine. 5A/1A
Set CT Ratio Value
Press
CT Ratio. The range is from
0001~9999.
Example: if set the ratio to be 100, that means the primary
current is secondary current x100.
and
4.6 PT
The PT option sets the secondary voltage (PT2 100~500V) of
the Voltage transformer (PT) that wires to the meter and the
PT ratio between PT1 to PT2. The default value is 400V for
Secondary PT (L-L), and the ratio between PT1 and PT2 is 1.
to
the and
repeatedly
to exit the num-
and to
to enter the
and to set
to confirm your
buttons
to enter
and
to confirm
buttons
to enter
to enter the