21
20
19
18
17
MOUNTING INSTRUCTIONS
Item
M7TIC/CM
does not need any special mechanical or electrical mounting contrivance.
It is designed to be mounted on DIN rail 35 mm. Working is not affected, in any way, by the mounting position.
Before mounting NEMO it is necessary to verify the type of connection as well as the line configuration on which it has to be connected.
Please make sure that data on the label correspond to the real network ones.
In the wiring scrupulously respect the wiring diagram; an error in connection unavoidably leads to wrong measurements or damages to the meter.
PROGRAMMABLE PARAMETERS
ACCESS CODE
Access to programming is protected by a software key composed of a 4-digit
numeric combination.
When one wants to enter the programming mode, the meter prompts the operator
to type the access combination, allowing or denying, according to loaded code,
the possibility to modify the parameters.
Programming is subdivided on two levels (with different access keys):
PROGRAMMING
Programming menu is subdivided in different pages:
• ACCESS CODE 1
• PARTIAL ACTIVE 3-PHASE ENERGY RESET
• MAXIMUM CURRENTS RESET
• AVERAGE POWER RESET
• HOUR METER RESET
• CONNECTION
• QUANTITY RELATED TO THE AVERAGE POWER
• AVERAGE POWER DELAY TIME
• RS485 COMMUNICATION
• CONTRAST
• ACCESS CODE 2
• C.T. TRANSFORMER RATIO
• V.T. TRANSFORMER RATIO
For programming are used the 3 keys on the front board:
OK
to confirm the loaded data
▲
increases the loaded value
▼
to shift the cursor
OK
+
▼
to enter/leave programming menu
OK
+
▲
to return to the previous programming menu page
DESCRIPTION
Item
M7TIC/CM
is an electronic device intended for use in monitoring systems, which can measure all the magnitudes of one-phase and three-phase lines.
The information can be shown on local display or is available in Modbus RTU format on RS-485.
GB
+
Tx/Rx Rs485
-
Tx/Rx Rs485
SG
Signal mass
1
24V power supply
2
24V power supply
Note:
use power suppliers
with double insulation or equivalent
- Current transformer inputs
+
Line voltage inputs
(direct or with voltage transformers)
Caution:
do not connect
the TA secondaries to the earth
I1
I2
1 2
I3
+
+
+
V1 V2 V3 Vn
+
SG
RS - 485
24V
I N P U T
O U T P U T
V1 V2 V3 Vn
4-WIRE NETWORK
3-WIRE NETWORK:
ONE-PHASE LINE:
do not connect Vn
(do not connect I2 only when 2
measuring systems are present)
do not connect V2 and V3
do not connect l2 and l3
LEVEL 1
1 RESET
1.1 Partial 3-phase active energy
1.2 Maximum currents
1.3 Average power
1.4 Hour meter
2 CONNECTION
2.1 4-wire line, 3 measuring systems
2.2 3-wire line, 3 measuring systems
2.3 3-wire line, 2 measuring systems (Aron phases L1-L3 )
2.4 single-phase line
3 AVERAGE POWER
3.1 Quantity: active, reactive or apparent 3-phase power
3.2 Delay time: 5/8/10/15/20/30/60 minutes.
4
RS485 COMMUNICATION
4.1 Address number:1÷247
4.2 Transmission speed: 9600-19200 bit/second
4.3 Parity
5
CONTRAST: 1/10
LEVEL 2
1 TRANSFORMERS RATIOS
1.1 External C.T. transformer ratio
1.2 External V.T. transformer ratio
1
Simultaneously press
OK
/
▼
2
The display shows
PASS / 0000
(active digit blinks)
3
Press the
▲
/
▼
to load the access key (usually 1000). To access transformers
ratios programming, point 33, enter the 2001 key and press
OK
4
Press
OK
5
The display shows
rES / ACtP /no
partial 3-phase active energy reset
6
If you don’t want to reset the partial energy counter, press
OK
and go to point
7. To reset the partial energy counter press the
▲
/
▼
until
rES / ACtP / YES
is
displayed and press
OK
7
The display shows
rES / lMd / /\ / no
maximum currents reset
8
If you don’t want to reset the maximum currents counter, press
OK
and go to
point 9. To reset the maximum currents counter press the
▲
/
▼
keys until the
display shows
rES / lMd / /\ / YES
and then press
OK
9
The display shows
rES / Pmd /\ / no
average power reset
10
If you don’t want to reset the average power counter, press
OK
and go to point
11. To reset the average power counter, press the
▲
/
▼
until the display shows
rES / PMd /\ / YES
and then press
OK
11
The display shows
rES tIME / no
hour meter reset
12
If you don’t want to reset the hour meter, press
OK
and go to point 13. To reset
the hour meter, press the
▲
/
▼
until the display shows
rES tIME / YES
and
then press
OK
13
The display shows
3-4n/3n3E (or the last set connection)
