IM3-20B, IM3-40B, IM3-80B
02-87/2017 Rev.1
1/2
1
2
3
4
7
8
4
3
6
1
2
4
3
5
1
2
BUS+
BUS-
+12 V
GND
1
2
BUS+
BUS-
+12 V
GND
1
2
BUS+
BUS-
+12 V
GND
1
2
Binary input units
EN
Characteristics
- Binary input units IM3-20B, IM3-40B and IM3-80B are used for connection of 2, 4 or 8 devices with
potential-less contacts (switches, buttons, switches of other design, PIR detectors, fi re and gas
detectors, etc.).
- Part of the inputs can be used as a balanced for alarm detectors:
- IM3-20B - inputs IN1, IN2
- IM3-40B - inputs IN1, IN2
- IM3-80B - inputs IN1 - IN5.
- Contacts of external devices connected to the inputs of the unit can be NO or NC - Input parameters
are confi gured in the software iDM3.
- Within the internal EZS configured in the iDM3 software, inputs must be set to balance or double
balance.
- The units generate a supply voltage of 12 V DC / 75 mA for powering external intrusion detectors, so
they can power PIR detectors, fi re and gas detectors.
- Active use 12 V DC output for powering detectors increases the nominal consumption of units from
BUS (see technical data).
- The units can be used for counting pulses of energy meters with pulse output.
- The units are equipped with a temperature input for connecting an external two-wire temperature
sensor TC/TZ (see accessories).
- IM3-20B, IM3-40B, IM3-80B in case type B are designed for mounting into a installation box.
General instrucions
Description of device
1. Output voltage 12 V DC
2. Data BUS
3. LED indication of unit´s state
4. Input for thermo sensor
5. Control inputs 1-2
6. Control inputs 1-4
7. Control inputs 1-7
8. Control input 8
Connection
1. For supplying of detectors 12 V DC /
max. 75 mA
2. Temperature sensor TC/TZ
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-.
Note: Digital output and input of thermo sensor is galvanically connected to BUS.