General Information - iNels MI3-02M Instrucciones

MI3-02M
External master BUS
EN
Characteristics
- External master MI3-02M provides expansion of the amount of units iNELS3 connected to the
central unit CU3-01M or CU3-02M of two other lines of BUS (i.e. about 2x32 peripheral units).
- Through the system BUS EBM, it is possible to connect to one central unit up to 8 external masters
MI3-02M.
- Combining central unit CU3-01M (02M) and 8 external masters MI3-02M we can reach maximum
capacity of iNELS system up to 576 peripheral units.
- If you require an extended system then it is possible to use communication of up to 8 central units
with Connection server using ELKONET protocol, eventually the integration of more central units
into BMS via ASCII protocol.
- MI3-02M have marked on the front panel of the unique hardware address. This address belongs to
the line BUS1. Hardware address of BUS2 line is always one value higher than for BUS1.
- MI3 units are supplied from PS3-100/iNELS.
- To power the lines BUS, it is necessary to use a BUS separator BPS3-02M or BPS3-01M (supply only
one line).
- Status signaling of each BUS (operation, fault) is indicated by two-color LEDs on the front panel
of the module.
- The last MI2-02M connected to the EBM BUS must be closed with a 120 Ω termination resistor. This
part adapted to be inserted between terminals is included into central units packages and it is
necessary to insert between terminals EBM+ and EBM-.
- MI3-02M in 1-MODULE version is designed for mounting into a switchboard, on DIN rail EN60715.
General instrucions
CONNECTION TO THE SYSTEM, INSTALLATION BUS
iNELS3 peripheral units are connected to the system through the BUS installation. Installation
BUS conductors are connected to the terminal units to BUS+ and BUS- terminals, wires cannot be
interchanged. For installation of BUS it is necessary to use a cable with a twisted pair of wires with
a diameter of at least 0.8 mm, the recommended cable is iNELS BUS Cable, whose features best
meet the requirements of the BUS installation. Bearing in mind that in terms of all the properties
is it is possible in most cases also use the cable JYSTY 1x2x0.8 or JYSTY 2x2x0.8, however it
is not recommended as the best option. In the case of a cable with two pairs of twisted wires
it is not possible to use the second pair of the other for modulated signal due to the speed of
communications; it is not possible within one cable to use one pair for one segment BUS and the
second pair for the second segment BUS. For installation of BUS it is vital to ensure that it is kept
at a distance from the power lines of at least 30 cm and must be installed in accordance with its
mechanical properties. To increase mechanical resistance of cables we recommend installation
into a conduit of suitable diameter. BUS topology installation is free except for the ring, wherein
each end of the bus must terminate at the terminals BUS + and BUS- peripheral unit. While
maintaining all the above requirements, the maximum length of one segment of the installation
BUS can reach up to 500 m. Due to the data communication and supply of units in one pair of wires,
it is necessary to keep in mind the diameter of wires with regards to voltage loss on the lead and
the maximum current drawn. The maximum length of the BUS applies provided that they comply
with the tolerance of the supply voltage.
CAPACITY AND CENTRAL UNIT
It is possible to connect to the central unit CU3-01M or CU3-02M two independent BUSes by means
of terminals BUS1+, BUS1- and BUS2+, BUS2-. It is possible to connect to each BUS up to 32 units,
so it is possible to connect directly to the central unit a total of 64 units. It is necessary to comply
with the requirement of a maximum load of one BUS line - maximum up to 1000 mA current. When
connecting units which draw greater than 1A, BPS3-01M with 3A sampling can be used. It is the
sum of the rated currents of the units connected to the BUS line, other units can be connected
using the units MI3-02M, which generate further BUSes. These are connected to the CU3 unit via
the system BUS EBM and you can connect a total of 8 units via EBM BUS to the central unit MI3-02M.
SUPPLYING THE SYSTEM
For supplying power to system units, it is recommended to use the power source of ELKO EP titled
PS3-100/iNELS. We recommend backing up the system with backup batteries connected to the
source of PS3-100/iNELS (see sample diagram of connecting the control system).

GENERAL INFORMATION

To operate the unit, it is necessary that the unit is connected to a central unit CU3 series, connected
to the central unit of the system CU3, or to a system that already contains this unit as its expansion
to include further system.
All unit parameters are set through the central unit CU3-01M in the software iDM3.
There is LED diode on the PCB for indication of supply voltage and communication with the
central unit series CU3. In case that the RUN diode fl ashes at regular intervals, so there is standard
communication between the unit and BUS. If the RUN diode lights permanently, so the unit is
supplied from BUS, but there is no communication between BUS and unit. In case that RUN diode
is OFF, so there is no supply voltage on the terminals BUS+ and BUS-.
Description of device
1
2
1. LED indication - operation state / LED indication - fault in BUS
2. Data BUS1
3. Terminals for EBM BUS connection
4. Data BUS2
Connection
-
EBM
+
EBM
BUS1+ BUS1-
BUS2+ BUS2-
7
from PS3-100/iNELS
+ 27V
GND
02-94/2017 Rev.2
3
4
EBM+ EBM- GND
7
BUS2+ BUS2-
BUS1+ BUS1-
+
BUS1
-
+
BUS2
-
1/2