Selec MFM376 Series User manual

selec Operating Instructions
MFM376 SERIES
OP506-V02
SPECIFICATIONS
96 x 96
Installation Category III
Frequency
Active Power
Apparent power
Power Factor
Active Energy
Reactive Energy
Apparent Energy
Measurement Accuracy
Voltage VL-N
Voltage VL-L
±0.5% of Full scale
±Full scale0.5% of
Current
±0.5% of Full scale
±0.1%
For L-N Voltage >20V,
For L-L Voltage >35V
±0.01
Class 1
Class 1
Class 1
Reactive Power
1%
1%
1%
ACCURACY
Product
ORDER CODE INFORMATION
Supply Certification
LISTED
DISPLAY
T
Note :
CT SECONDARY
PT PRIMARY
PT SECONDARY
DISPLAY UPDATE TIME
DISPLAY SCROLLING
POWER CONSUMPTION
ENVIRONMENTAL CONDITIONS
MOUNTING :
WEIGHT
OUTPUT
Pulse Output
Pulse Width :
3 Row of 4 Digits
7 Segment LED Display 0.49 inch Height Digit
Integrated with parameter Units
3 Ø 4 wire, 3 Ø - 3 wire, 2 Ø - 3 wire and Ø -
Installation Category (600V)
1A to 10,000Aif CT secondary is 1 else
5Ato 10,000A
1Aor 5A (programmable)
100V to 500kV (Programmable for any value)
100 to 500V (Programmable for any value)
1 sec. for all parameters
Auto / Manual / Default
Less than 8VA
- Indoor use
- Altitude of up to 2000 meters
- Pollution degree
Temperature :
Humidity : Up to 85% non-condensing
Panel mounting
MFM376-230V AC : 260gms
MFM376-C : 230gms
Voltage range : External 24V DC max.
Current capacity : 100 mAmax
100ms 5ms.
WIRING INPU
RATED INPUT VOLTAGE
FREQUENCY RANGE
RATED INPUT CURRENT
BURDEN
CT PRIMARY
-1 2 wire
(R/Y/B Programmable)
45-65 Hz
Nominal 5AAC (Min-14mA, Max-6A)
0.5VA@5Aper phase
1A/ 5A to 10,000A(Programmable for any value)
11 to 300VAC (L-N) ; 19 to 519VAC (L-L)
III
II
:
±
Operating : -10 C to 55 C
Storage : -20 C to 75 C
° °
° °
240V AC, 20%, 50/60Hz±
MFM376-230VAC
Note : a) For voltage, current and power resolution is
automatically adjusted
b) For power factor resolution is 0.001
c) • Blinks indicating accumulation of energy, if load
is connected on any one phase of 3 Phase.
0.01K
0.1K
1K
0.01M
0.1M
<40
<400
< 0040
< 00040
< 000040
0.001K
0.01K
0.1K
1K
0.01M
PT
x
Ratio
CT Ratio
Pulse INT
RESOLUTION :
For installing the meter
1. Prepare the panel cutout with proper dimensions s
shown below.
a
2 meter. Push the meter into the panel cutout. Secure the
in its place by fitting the clamp on the rear side. fit
clamps on both sides in diagonally opposite location for
optimum fitting.
3. For proper sealing, tighten the screws evenly with
required torque.
MECHANICAL INSTALLATION
Outline
Dimensions (in mm)
Panel cutout
Dimensions (in mm)
90.5
99
99
349
90.5
90.5
TERMINAL CONNECTIONS
MAINTENANCE
1. The equipment should be cleaned regularly to avoid
blockage of ventilating parts.
2. Clean the equipment with a clean dry or damp cloth.
Do not use any cleaning agent other than water.
SAFETY PRECAUTIONS
All safety related codifications, symbols and
instructions that appear in this operating manual or on
the equipment must be strictly followed to ensure the
safety of the operating personnel as well as the
instrument.
If the equipment is not used in a manner specified by the
manufacturer it might impair the protection provided by the
equipment.
Do not use the equipment if there is any mechanical
damage.
Ensure that the equipment is supplied with correct
voltage.
1. Read complete instructions prior to installation and
operation of the unit.
2. Risk of electric shock.
3. The equipment in its installed state must not come in
close proximity to any heating sources, oils, steam,
caustic vapors or other unwanted process by products.
1. To prevent the risk of electric shock, power supply to the
equipment must be kept OFF while doing the wiring
arrangement.
2. Wiring shall be done strictly according to the terminal
layout. Confirm that all connections are correct.
3. Use lugged terminals.
4. To reduce electromagnetic interference use of wires with
adequate ratings and twists of the same in equal size shall
be made with shortest connections.
5. Layout of connecting cables shall be away from any
internal EMI source.
6. Cable used for connection to power source, must have a
cross section of 0.5mm to 2.5mm
Thesewires shall have current carryingcapacityof 6A.
7. Copper cable should be used
8. Before attempting work on device, ensure absence of
voltages using appropriate voltage detection device.
2 2 ( 20 to 14AWG ; 75 C(min)).
(Stranded or Single core cable).
0
WIRING GUIDELINES
1. This equipment, being built-in-type, normally becomes a
part of main control panel and in such case the terminals
do not remain accessible to the end user after installation
and internal wiring.
2. Conductors must not come in contact with the internal
circuitry of the equipment or else it may lead to a safety
hazard that may in turn endanger life or cause electrical
shock to the operator.
3. Circuit breaker or mains switch must be installed
between power source and supply terminals to facilitate
power 'ON' or ‘OFF’ function. However this switch or
breaker must be installed in a convenient position
normally accessible to the operator.
4.
5. The equipment shall not be installed in environmental
conditions other than those mentioned in this manual.
. The equipment does not have a built-in-type fuse.
Installation of external fuse of rating 275V AC / Amp for
electrical circuitry is highly recommended.
Before disconnecting the secondary of the external
current transformer from the equipment, make sure that
the current transformer is short circuited to avoid risk of
electrical shock and injury.
6
0.5
/ battery
INSTALLATION GUIDELINES
CAUTION :
WARNING :
CAUTION :
N
S2S1S2S1S2S1 V1
N
L
O
A
D
I1
V2 V3
L1
L2
L3
I2I3
PULSE
OUTPUT
L
N
+
CONNECTION DIAGRAM
0.01K
0.1K
1K
0.01M
0.1M
1M 0.1M
4000000 1M
kWh /
kVAh /
kVArh
40V - 270V DC,
85V - 270V AC, 50/60Hz
MFM376-C
MFM376-230VAC
MFM376-C
N
S2S1S2S1S2S1 V1
N
L
O
A
D
I1
V2 V3
L1
L2
L3
I2I3
PULSE
OUTPUT
+
+ +
CONNECTION DIAGRAM
RS485
Doc. name : OP INST MFM376 SERIES OP506-V02(Page 1 of 4)

Doc. name : OP INST MFM376 SERIES OP506-V02(Page 2 of 4)
MFM376
selec
PRG
INT
MFM376
PG/ A/ M
Press
“ ”
Press
“ ”
Press
“ ”
Press
“ ”
Press
“ ”
SERIAL NUMBER DESCRIPTION
Press and key for 10sec to display serial no for 5sec.
Press key for 3sec to toggle between AUTOMATIC /
MANUAL / DEFAULT MODE (In AUTOMATIC mode only
first screen of all pages will be scrolled)
AUTOMATIC / MANUAL / DEFAULT MODE
Press key for 3sec displays voltage sequence detection
on last row and on last two rows for 3P4W and 3P3W only.
PHASE DETECTION
Press key for 3sec displays current direction detection
on last row. (Not applicable for 3 phase 3 wire)
For Zero Run Hour Selection : Run Hour is ON Hour
For Non zero Run Hour Selection: Parameter selectable
between 1% to 10% will act as ON Hour.
CT ERROR
RUN HOUR SELECTION
NETWORK SELECTION AND WIRING INPUT
Network selection in
configuration mode Wiring
3P4W
3P3W
3P4W, 2P3W, 1P2W
3P3W
1P2W 1P2W-R, 1P2W-Y, 1P2W-B
10
No
3P4W
5
5
No / Yes
3P4W / 3P3W /
1P2W-R/1P2W-Y
/ 1P2W-B
5 / 1
5 to 10,000
0000 to 9998
Range or
Selection
Factory
Setting
350
350
Sliding
1
15
0.01
0.1
100 to 500
100 to 500k
Sliding/Fixed
1 to 30
1 to 30
0.01 to 99.99
0.1 to 2.0
0 to 10 0
1000
0000 to 9998
1
1 to 255
FRONT PANEL DESCRIPTION
ONLINE PAGE DESCRIPTION
There are three dedicated keys labelled as , and .
Use these 3 keys to read parameters. Simply press
these keys to read the parameters. Units of corresponding
parameters on display will glow automatically.
Use key to go back to previous page in sub page.
Press
“ ”
KEY
PRESS
ONLINE PAGE DESCRIPTION
1st
screen
Displays three phase average line
to neutral voltage, current and
power factor.
Displays three phase average line to
line voltage, current and frequency.
Displays three phase current.
Displays three phase line to neutral
voltage.
Displays three phase line to line
voltage.
2nd
screen
3rd
screen
4th
screen
5th
screen
Note : 1) For 3 phase 3 wire, only second, third and fifth screen
will be available.
2) For 1 phase 2 Wire displays only voltage, Current and
Power factor of selected phase in one screen.
Press
“PAGE”
1st
screen
Displays three phase active power.
Displays three phase reactive power.
Displays three phase apparent power.
Displays three phase total active
power, reactive power, apparent power.
2nd
screen
3rd
screen
4th
screen
Note : 1) For 3 phase 3 wire, only forth screen will be available.
2) For 1 phase 2 Wire displays only active, reactive and
apparent power of selected phase in one screen.
Press
“PAGE”
Press
“PAGE”
1st
screen
Displays three phase power factor.
Displays three phase phase angle.
Displays active, reactive and
apparent maximum power demand
of three phase.
Displays active and reactive minimum
power demand of three phase.
Displays active and reactive minimum
power demand of three phase.
2nd
screen
3rd
screen
4th
screen
Note : 1) For 3 phase 3 wire only first, third and forth screen will
be available.
(In first screen only average power factor will available)
2) For 1 phase 2 wire only selected phase parameters will
be displayed.
Press
“ ”
Press
“PAGE”
1st
screen
Displays three phase current.
Displays total percentage harmonics of
current of three phase
Displays active, reactive and apparent
power of first phase.
Displays active, reactive and apparent
power of second phase.
Displays active, reactive and apparent
power of third phase.
Displays total active, reactive and
apparent power of three phase.
Displays active, reactive and apparent
maximum power demand of three phase.
2nd
screen
3rd
screen
4th
screen
Note : 1) For 3 phase 3 wire, only first, second, sixth, seventh and
eighth screen will be available.
2) For 1 phase 2 Wire, only first, second, third, seventh and
eighth screen of selected phase will be available.
Press
“PAGE”
KEY
PRESS
ONLINE PAGE DESCRIPTION
1st
screen
Displays three phase total reactive
energy.
Displays three phase total active
energy.
Displays three phase total apparent
energy.
Displays Run hour.
Displays Auxiliary Interrupts.
2nd
screen
3rd
screen
4th
screen
5th
screen
Press
“ ”
KEY
PRESS
ONLINE PAGE DESCRIPTION
1st
screen
Displays three phase line to neutral
voltage.
Displays three phase line to line
voltage.
Displays total percentage harmonics of
line to neutral voltage of three phase.
Displays total percentage harmonics of
line to line voltage of three phase.
Displays three phase instantaneous line
to neutral voltage.
2nd
screen
3rd
screen
4th
screen
5th
screen
Note : 1) For 3 phase 3 wire, only second, forth and sixth screen
will be available.
2) For 1 phase 2 Wire, only first, third and fifth screen of
selected phase will be available.
For MFM376-C
For MFM376-230VAC
Displays three phase instantaneous line
to line voltage.
6th
screen
1st
screen
Displays three phase instantaneous
current.
Displays three phase power factor.
Displays three phase phase angle.
Displays three phase average line to
neutral voltage, current and power factor.
2nd
screen
3rd
screen
4th
screen
5th
screen
6th
screen
7th
screen
8th
screen
Displays three phase average line to
line voltage, current and frequency.
5th
screen
Note : 1) For 3 phase 3 wire, only first screen, average power factor,
fifth screen will be available.
2) For 1 phase 2 Wire, only first, second and third screen of
selected phase will be available.
Displays total apparent energy.
Press
“ ”
Press
“PAGE”
1st
screen
Displays three phase maximum demand
of current.
Displays import active energy.
Displays export active energy.
Displays total active energy.
Displays import reactive energy.
Displays export reactive energy.
Displays total reactive energy.
2nd
screen
3rd
screen
4th
screen
Note : 1) For 3 phase 3 wire, all screens will be available.
2) For 1 phase 2 wire, all screens of selected phase will be
available.
5th
screen
6th
screen
7th
screen
8th
screen
Displays Auxiliary interrupts.
Displays Run Hour.
9th
screen
10th
screen
KEY
PRESS
ONLINE PAGE DESCRIPTION
There are three dedicated keys with symbol .
Use these 3 keys to enter into configuration menu
For the configuration setting mode :
• Use + key for 3 sec to enter and exit from
configuration menu.
• Use key to shift parameter value in edit mode .
• Use key to increment the parameter and for roll over.
•
• Press key and use key to go back to previous page.
,&
Setting should be done by professional after going
through this user manual and having understood the
application situation.
Note :
(Only if parameter is in edit mode)
Use key to save the parameter value & go to next page.
CONFIGURATION
Change Password
New Password
Network Selection
CT Secondary
CT Primary
Function
Config
page.
PT Secondary
PT primary
Demand Interval Method
Demand Interval Duration
Demand interval length
Pulse Weight
Pulse Duration
Run Hour Selection
Factory Default
Reset Energy and Max Dmd
Password
Reset kWh
Password
1
1.1
2
3
4
5
6
7
8
9
10
11
12
18
17
18.1
18.01
To set value of PT and CT Primary in "K", first set the
value in division of 100 which one want to set.
then press key for
3 sec. It will shift the value in K with 0.1 resolution
(i.e. If want to set 500k then set 5000)
i.e. 500.0 with "K" symbol.
Slave Id
13
Parity None
300, 600, 1200,
2400, 4800,
9600 and
19200 (bps)
None, Odd,
Even
15
Baud Rate 9600
14
1
Stop Bit 1 or 2
16
Rest kVArh
18.02
Reset kVah
18.03
Reset MAx
18.04
Reset Run Hour
18.05
Reset Interrupt
1001
Yes / No
Yes / No
Yes / No
No
No
No
0001 to 9999
Yes / No No
Yes / No No
Yes / No No
Yes / No No
Yes / No No
18.06
For resetting energy parameter user will be promoted for
password. If correct password is entered. User will be able to
reset all energy parameters. This password will be value which
will be greater than the configuration password by 1
*
*
*
*
Marked values are only valid for MFM376-C.
*

Doc. name : OP INST MFM376 SERIES OP506-V02(Page 3 of 4)
Meaning
Constant
Parameter
30102
30100
0x66
0x64 Run Hour
Auxillary Interrupts
Total Harmonic Distortion(THD)
30124 0x7C THD of Voltage V1N
MFM376-230VAC / MFM376-CPulse output from
meter can be interfaced into a process through a PLC for
on line control of energy content in the process.
If the PLC has a self excited digital input, external
DC supply is not needed.
The kWh pulse is also used to derive average kWh
information at the PLC.
PROCESS INTEGRATION
MFM376-230VAC / MFM376-CPulse output from
meter can be used as alarm generator or total energy
controller by interfacing it with Pre-settable counter and
control circuits (Contactors, Relay, Trip Circuit).
The counter is loaded with the maximum energy
consumption. When count reaches setpoint it provides
output to control circuit to take appropriate action.
ENERGY CONTROLLER
APPLICATION OF PULSE OUTPUT
Note : + and - is applicable only for MFM376-C.
12 / 24V DC
+
To
Control
Circuit
COUNTER
+
I / P
O / P
S2S1 S2S1 S2S1 V1N V2 V3
I1I2I3
MFM376-230VAC /
MFM376-C
PULSE
O/P
+NL
RS485
+
+
S2S1 S2S1 S2S1 V1N V2 V3
I1I2I3
MFM376-230VAC /
MFM376-C
PULSE
OUTPUT
+
24V DC
maximum
P
L
C
+
NL
RS485
+
+
Valid only for
MFM376-C
Valid only for
MFM376-C
MODBUS REGISTER ADDRESSES LIST
Readable parameters for Communication valid only for MFM376-C : [ Length (Register) : 2 ; Data Structure : Float ]
30074 0x4A
30076
30078
0x4C
0x4E MAX Instantaneous voltage V31
MAX Instantaneous voltage V12
MAX Instantaneous voltage V23
30072 0x48
30068 0x44
30064 0x40
30070 0x46
30066 0x42
MAX Instantaneous voltage V3N
MAX Instantaneous voltage V1N
MIN Reactive Power
MAX Instantaneous voltage V2N
MAX Apparent Power
30050 0x32 Frequency
Total KW
Total KVAR
Total KVA
30052 0x34
30054 0x36
30056 0x38
30058 0x3A MAX Active Power
30060 0x3C MIN Active Power
30062 0x3E MAX Reactive Power
30048 0x30 Average PF
Address Hex Address Parameter
30046 0x2E PF 3
30000
30002
30004
30006
30008
30010
30012
30014
30016
30018
30020
30022
30024
30026
30028
30030
30032
30034
30036
0x00
0x02
0x04
0x06
0x08
0x0A
0x0C
0x0E
0x10
0x12
0x14
0x16
0x18
0x1A
0x1C
0x1E
0x20
0x22
0x24
Voltage V1N
Voltage V2N
Voltage V3N
Average Voltage LN
Voltage V12
Voltage V23
Voltage V31
Average Voltage LL
Current I1
Current I2
Current I3
Average Current
kW1
kW2
kW3
kVAr1
kVAr2
kVAr3
kVA1
30038 0x26 kVA2
30040 0x28 kVA3
30042 0x2A PF 1
30044 0x2C PF 2
30080 0x50 MAX Instantaneous current I1
30082 0x52 MAX Instantaneous current I2
30084 0x54 MAX Instantaneous current I3
30086 0x56 Import Active energy
30088 0x58 Export Active energy
30090 0x5A Total Active energy
30092 0x5C Import Reactive energy
30094 0x5E Export Reactive energy
30096 0x60 Total Reactive energy
30098 0x62 Total Apparent energy
Address Hex Address Parameter
30128
30130
30132
30134
0x80
0x82
0x84
0x86
30136
30138
30140
0x88
0x8A
0x8C
THD of Voltage V3N
THD of Voltage V12
THD of Voltage V23
THD of Voltage V31
THD of Current I1
THD of Current I2
THD of Current I3
30684 0x2AC Serial number of unit
Formula to find address of individual Harmonic
Voltage V1N
Voltage V2N
Voltage V3N
Voltage V12
Voltage V23
Voltage V31
Current I1
Current I2
Current I3
0
1
2
3
4
5
6
7
8
For Example,
To find the 14 Harmonic address
of Voltage V31.
Following formula can be used :
Formula with the parameter :
{143 + [(Harmonic no-2) x 2]
+ 60 x C P}
Eg. {143 + [(14-2) x 2 ] + 60 x 5}
= 467
So, Check the 14 Harmonic of
Voltage V31 at 467 address.
th
th
{143 + [(Harmonic no-2) x 2]
+ 60 x Constant Parameter }
30126 0x7E THD of Voltage V2N
Integer
Integer
1
1
1
1
Set to factory setting range
Reset Total Active Energy
Integer
11 Reset Total Apparent Energy
Integer
Integer
Integer
Integer
1
1
1
1
1
1
1
1
Reset Total Reactive Energy
Reset Maximum Demand
Reset Run Hour
Reset Auxillary Interrupt Count
40017
40018
0x11
0x12
Factory Default
Reset kWh
40019 0x13 Reset kVAh
40020
40021
40022
40023
0x14
0x15
0x16
0x17
Reset kVArh
Reset MAX Demand
Reset Run Hour
Reset Interrupts Count
Min value : 0 Max value : 9998
Value : 0
Value : 1
Value : 2
Value : 3
Value : 4
Meaning : 3P-4W
Meaning : 3P-3W
Meaning : 1P2W-P1
Meaning : 1P2W-P2
Meaning : 1P2W-P3
Integer
Integer
Integer
Integer
Integer
Integer
1
1
1
1
1
1
40000
40001
0x00
0x01
Password
N/W selection
Range Data
Structure
Length
(Register)
Address Parameter Hex Address
Readable / writable parameters for :Communication valid only for MFM376-C
0x0005
0x0006
9600
19200
Min Value : 5
Min Value : 1
Min Value : 100
Min Value : 100
Max Value : 10000
Max Value : 10000
Max Value : 500
Max Value : 500000
Integer
Integer
Integer
1
1
2
Integer
Integer
Integer
1
1
1
Value : 0x0000
Value : 0x0001
Min Value : 1
Meaning : Sliding
Meaning : Fixed
Max Value : 30
40003
40004
40005
0x03
0x04
0x05
CT primary (CT Secondary = 5) (A)
CT primary (CT Secondary = 1) (A)
PT Secondary (V)
PT primary (V)
Demand Interval Method
Demand Interval Length(min)
0x07
0x08
40007
40008
Integer
1
0x0000 300
0x0001 600
0x0002 1200
0x0003 2400
0x0004 4800
Min Value : 1
Min Value : 0
Max Value : 5
Max Value : 10
Integer
Integer
1
1
40002
40012
0x02
0x0C
CT Secondary (A)
Run Hour Selection
Integer
1
Min Value : 1
Min Value : 0.01
Max Value : 30Demand Interval Duration
0x0940009
Integer
1
Max Value : 99.99
Pulse Weight
0x0A
40010
Min Value : 0.1 Integer
1
Max Value : 2.0Pulse Duration
0x0B
40011
Integer
1
Min Value : 1 Max Value : 255
Slave ID
0x0D
40013
Baud rate
0x0E
40014
Integer
Integer
1
0x0000
0x0001
1
2
1
0x0000
0x0001
0x0002
None
Odd
Even
40015 0x0F Parity
Stop bit
Value Meaning
0x10
40016

MFM376
selec
PRG
INT
MFM376
PG/A /M
PULSE
O/P
+
+
PULSE
O/P
+
+
PULSE
O/P
+
+
(Specifications are subject to change, since development is a
continuous process.)
Selec Controls Pvt. Ltd., India
Factory Address :
EL-27/1, Electronic Zone, TTC Industrial Area, MIDC, Mahape,
Navi Mumbai - 400 710, INDIA.
Tel. No. : [phone]/430 | Fax No. : [phone]
Toll free : 1800 227 353 (BSNL/MTNL Subscribers only)
Website : www.selec.com | Email : [email protected]
TYPICAL WIRING DIAGRAM
1 Ø - 2 WIRE, 1 CT
1 PHASE - 2 WIRE
S2S1 S2S1 S2S1 V1N V2 V3
LOAD
LINE
L1
N
I1I2I3
2 PHASE - 3 WIRE
2 Ø - 3 WIRE, 2 CT’S and 2 PT’S
2 Ø - 3 WIRE, 2 CT’S
LOAD
LINE
L1
L2
N
3 PHASE 4-WIRE (COMMONLY USED)
3 Ø - 4 WIRE, 3 CT’S and 3 PT’S
3 Ø - 4 WIRE, 3 CT’S
S2S1 S2S1 S2S1 N V2 V3
LOAD
LINE
L1
L2
L3
N
I1I2I3
V1
LINE LOAD
LINE
S2S1 S2S1 S2S1 V1N V2 V3
I1I2I3
LOAD
L1 L1
L2 L2
L3
N N
S2S1 S2S1 S2S1 N V1 V2 V3
I1I2I3
3 PHASE 3-WIRE
3 Ø - 3 WIRE, 2 CT’S and 2 PT’S
3 Ø - 3 WIRE, 2 CT’S
S2S1 S2S1 S2S1 V1N V2 V3
LOAD
LINE
L1
L2
L3
I1I2I3
S2S1 S2S1 S2S1 V1N V2 V3
LOAD
LINE
I1I2I3
S2S1 S2S1 S2S1 V1N V2 V3
I1I2I3
L1
L2
L3
PULSE
O/P
+
+
PULSE
O/P
+
+
PULSE
O/P
+
+
PULSE
O/P
+
+
Doc. name : OP INST MFM376 SERIES OP506-V02(Page 4 of 4)
NL
RS485
+
+
Valid only for
MFM376-C
NL
RS485
+
+
Valid only for
MFM376-C
NL
RS485
+
+
Valid only for
MFM376-C
NL
RS485
+
+
Valid only for
MFM376-C
NL
RS485
+
+
Valid only for
MFM376-C
MFM376-230VAC /
MFM376-C
MFM376-230VAC /
MFM376-C
MFM376-230VAC /
MFM376-C
MFM376-230VAC /
MFM376-C
MFM376-230VAC /
MFM376-C
MFM376-230VAC /
MFM376-C
MFM376-230VAC /
MFM376-C
NL
RS485
+
+
Valid only for
MFM376-C
NL
RS485
+
+
Valid only for
MFM376-C
Note : + and - is applicable only for MFM376-C.
CONNECTION DIAGRAM FOR COMMUNICATION
VALID ONLY FOR MFM376-C
RS485-RS232
Converter
Master
Suggested
terminating resistor
(120 ohm, ¼ watt)
Contact sales for PC based monitoring
software to communicate with the meters.
MFM376
selec
PRG
INT
MFM376
PG/A /M
MFM376
selec
PRG
INT
MFM376
PG/A /M
All fuse types: 0.5A class CC UL type
0.5A fast acting 600V
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