Vimar BY-ME User manual

Quick Guide
HOME AUTOMATION
GUIDE TO
THE HOME
AUTOMATION
SYSTEM

Home Automation System Guide
Rules for installing the By-me system
II
Introduction
This guide groups ten basic rules for creating a home automation system with the By-me home automation
system: from choosing the cables for wiring the devices to correctly sizing the system and making provision
for a sufficient number of power supply units (taking account of the absorption of each device in the field); from
precisely drawing up the Areas and Lines in which the system is divided to the constraints of the speaker system;
from the maintenance of the back-up batteries for the burglar alarm system to the choice of the system topology;
from SPD installation at the power supply units to the detailed diagram for the connections between the actuators
and their loads.
These are important instructions for building and correctly operating the entire system.
COMFORT SAFETY
ENERGY
EFFICIENCY
CONTROL
global supervision
remote control
local control
automation systems
sound system
energy management
climate control
burglar alarm
technical alarms
access control
video door entry
video surveillance
lighting
control

Home Automation System Guide
Rules for installing the By-me system
1
1. Choosing the wiring cables
Use cables of different colours to distinguish between the different lines of By-me devices during installation. The
cable for Vimar Bus systems (2x0.5mm
2
) is insulated for 400 V nominal voltage to earth and can be routed along
the same ducts as are used to carry category I power cables. In the case of new buildings, it is good policy to
install a separate dedicated duct for the Bus cable. The following table lists the cables that can be used for wiring
the devices in the system.
2. Providing for SPDs
Always make provision for SPDs upstream of the By-me system power supply units to prevent overloads from
damaging the system. As a general rule, the power supply side must be protected using a Class 1 SPD down-
stream of the power meter, a Class 2 SPD after the magneto-thermal protection device, and a Class 3 SPD at
the power supply input.
Type of cables
Article Use ColourLaying
01840 Automation White Internal
01840.Y Burglar alarm YellowInternal
01840.B Speaker system Blue Internal
732H
Video door entry
Light Blue Internal
732I Green Underground
By-me BUS
Exchange meter
SPD
class I SPD class II SPD class III
Power supply unit
01400
L N
N L

Home Automation System Guide
Rules for installing the By-me system
2
4. Choosing the power supply units
Correctly size the number of power supply units for the number of installed devices. When calculating the power
supply units it is important to respect the maximum limit on permissible products for the different lines of the By-
me system.
The tables on the following pages show the absorption of the devices on the By-me BUS.
By-me power supply units
CodeDescription Draw from
Bus (mA)
Input to the
Bus (mA)
EIKON ARKÉPLANA DIN rail
01400 Power supply unit 230V~ 29Vdc 400 mA 400
01401 Power supply unit 120-230V~ 29Vdc 1280 mA 1280
01800 SAI-BUS 29 V power supply unit -320
01801 Power supply unit 29 V 800 mA -800
01804 SAI-BUS By-me back-up unit - 320
01807 SAI-BUS 600 mA DIN back-up unit -800
01830 Power supply unit 12 V -1000
01877
By-me dimm. power supply unit LED RGB 12-24V 10 -
20580 19580 14580 Power supply unit 32 Vdc 100 mA -100
By-me back-up unit (burglar alarm)
Code Description Draw from
Bus (mA)
Input to the
Bus (mA)
EIKON ARKÉPLANA DIN rail
01804 SAI-BUS By-me back-up unit -320
01807 SAI-BUS 600 mA DIN back-up unit -800
3. Areas and Lines
The system architecture offers the facility of organiz-
ing the system adopting a structure of 15 areas con-
nected to a backbone (Area 0, Line 0 dedicated to the
burglar alarm system). Each of the 15 areas can be
split up into 16 lines, each allowing the connection of
up to 128 devices. The lines are connected one with
another by way of couplers (routers) that will allow the
passage only of messages established at the time of
programming the system. Each line will be connected
to 1 or at most 2 power supply units, depending on the
demand of the devices installed.
When initializing the control unit, remember the area
and line parameters to be entered for different system
structures:
•burglar alarm branch only: Area 0 and Line 0
•automation system branch only: Area 1 and Line 0
•burglar alarm and automation system branches:
Area 0 and Line 0 (in this type of structure remember
that it is essential to immediately configure the
line coupler 01845 with Area 1 and Line 0).
43
64 4321
...
0
3
4
1
2
128
15
4321
765
128 4321
765
AL
128 4321
765
AL
128 4321
765
AL
128 4321
765
AL
127 4321
765
AL
43
64 4321
...
0
3
4
1
2
15
128 4321
765
128 4321
765
AL
128 4321
765
AL
128 4321
765
AL
128 4321
765
AL
127 4321
765
AL
max 128 devices
max 15 areas
Bus burglar alarm system
AL Line coupler (art 01845)
max 16 lines
43
64 4321
...
0
3
4
1
2
15
127 4321
765
127 4321
765
AL
127 4321
765
AL
127 4321
765
AL
127 4321
765
AL
127 4321
765
AL
AREA 1
AREA 2
AREA 15
1
2
3
4
5
6
60
AL
AL
AL
Division into Areas and Lines.

Home Automation System Guide
Rules for installing the By-me system
3
Absorption of the devices from the By-me BUS (29 Vdc power supply)
Code Description Draw
from Bus
(mA)
Draw from
AUX power
supply (mA)
EIKON ARKÉIDEA PLANA DIN rail
Control units
20480 16930 14480 SAI-BUS control unit 10
20510 16950 14510 Control unit 10
21509 3M touch screen control unit 45
Actuators
20534 19534 16974 14534 1M relay actuator 10
20535 19535 16975 14535 Actuator with 1 relay output 10
20537 19537 14537 1x16 A relay actuator+curr. sensor 5
20472 1647214472 Relay actuator 8
20489 19489 16939 14489 SAI-BUS actuator 5
01456 16 A relay actuator +curr. sensor+diff. sensor 5
01850.2 Actuator with 1 relay output 14
01851.2 Actuator with 4 relay outputs 18
01852.2 Actuator for 2 roller shutters-laths 24
01856 0-10 Vdc actuator for ballast + relay 10
01975 1-10Vdc actuator LED 120-230V 10 25
01976 1-10Vdc actuator LED 12-24V 10
600@12 V~
(250@12 Vdc)
350@24 V~
(120@24 Vdc)
Dimmers
01867 230 V 500 VA MASTER dimmer 10
01863 230 V 800 W/VA MASTER dimmer 10
01870 230 V universal MASTER dimmer 15
Controls with built-in actuator
20525 19525 16965 14525 Two simple buttons + relay 10
20526 19526 1696614526 Two rocker buttons + relay 10
2052716967 14527 Two rocker buttons + roller shutter actuator 22
20527.1 19527.1 16967.1 14527.1
Two rocker buttons + actuator, louvre rolling shutters 22
20529 19529 16969 14529 Two rocker btns. + universal SLAVE 13
20545 19545 16985 14545 Three simple buttons + relay 16
20546 19546 16986 14546 Three rocker buttons + relay 16
20547 1954716987 14547 Three rocker buttons + roller shutter actuator 25
20549 19549 16989 14549 Tree rocker btns. + universal MASTER 16
Simple controls
20520 19520 16960 14520 Two simple buttons 10
20521 19521 16961 14521 Two rocker buttons 10
2054019540 16980 14540 Three simple buttons 10
20541 19541 16981 14541 Three rocker buttons 16
21520 Four Tactil home automation buttons 38
21540 Six Tactil home automation buttons 45
Interfaces
20490.1 19490.1 16940.1 14490.1 SAI-BUS interf. 2 ind. contacts15
20491 19491 16941 14491 SAI-BUS contact interface 12 V
15 (+10
at output
12 Vdc)

Home Automation System Guide
Rules for installing the By-me system
4
Absorption of the devices from the By-me BUS (29 Vdc power supply)
Code Description Draw
from Bus
(mA)
Draw from
AUX power
supply (mA)
EIKON ARKÉIDEA PLANA DIN rail
Interfaces
20493 19493 16943 14493 SAI-BUS interface 2 RF 20
20508 19508 14508 EnOcean BUS interface 20
20515 19515 16955 14515 Conventional control interface 10
20518 19518 16958 14518 Interface for 2 conventional controls 1 M15
20584 19584 14584 By-me IR interface 20
20584.1 19584.1 14584.1 Home automation IR transmitter 20
01846 Emergency app. interface with By-me 10
01452 Pulse counter interface 10
01965
By-me module for Due Fili Plus video door entry unit 10
Energy management
02951
2M home automation touch screen thermostat 5
20513 19513 16953 14513 Fan-coil thermostat 20
20514 19514 16954 14514 Thermostat with display 20
20538 19538 14538 Home automation temperature probe 5
01450 3IN energy meter, toroidal sensor 5
01451 Energy meter with current sensor 5
01455 3 IN load control module, toroidal sensors 5
01465 HVAC control for heating systems 55 VA
01466
Home automation actuator, 4 analogue outputs 55 VA
01467
Home automation interface, 3 analogue inputs 20
Burglar alarm devices
20482 19482 16932 14482 SAI-BUS connector 10
20483 19483 16933 14483 SAI-BUS digital keypad 15
20485 19485 16935 14485 SAI-BUS IR detector 10
20486 19486 SAI-BUS IR detector, directionally adjustable 10
20487 19487 16937 14487 SAI-BUS IR+microwave detector 15
20495 19495 16945 14495 SAI-BUS indoor siren
10 standby
(max 20)
01803SAI-BUS battery holder unit 150
01806 SAI-BUS outdoor siren 10
01828 SAI-BUS mini IR detector, wall-mounting 15
01829.1
SAI-BUS IR+microwave detector, wall-mounting 20
Video door entry system devices
19558 3.5" Due Fili Plus video door entry unit 200 *
19558.D
3.5" video door entry unit, audiofreq. Due Fili Plus 200 *
20557 19557 14557
Due Fili Plus speakerphone audio door entry unit 150 *
20577 19577 14577 Due Fili Plus call button 150 *
Speaker system devices
20581 19581 14581 Two rocker btns plus 1+1 W amplifier 150 **
20582 19582 14582 2 M RCA audio input 35
20585 19585 14585 Docking station for iPod/iPhone 35
20586 19586 14586 Call microphone 35
01900 FM radio tuner with RDS 35
01901
Stereo amplifier with 2 x 8Ω outputs, 10+10 W 20

Home Automation System Guide
Rules for installing the By-me system
5
Absorption of the devices from the By-me BUS (29 Vdc power supply)
Code Description Draw
from Bus
(mA)
Draw from
AUX power
supply (mA)
EIKON ARKÉIDEA PLANA DIN rail
Access control devices
20470 16470 14470 Transponder key reader22
20471 16471 14471 BUS smart card reader/programm. 16
System components
01468Home automation logic unit 25
01810 SAI-BUS telephone dialler -
01842 Decoupling coil -
01845 Line coupler 10
01942 GSM-BUS phone communicator 10
200@29 Vdc
(250@12 Vdc)
01945 DIN web server 10
145@29 Vdc
(330@12
Vdc)
20516 19516 16956 14516 Receiver for IR remote control 10
Touch screen
20511.119511 14511.1 Energy 4.3" colour touch screen 10
60@29 Vdc
(120@12 Vdc)
20512 19512 16952 14512 3 M B&W touchscreen 42
21511 Colour touchscreen 4.3” Full Flat 10
60@ 29 Vdc
(120@12 Vdc)
21512 3 M Full Flat colour touchscreen 42
21553.1 10" IP Multimedia video touchscreen -300
215544.3” Full Flat video touchscreen 5.5
100@29 Vdc
(180@12 Vdc)
* Video door entry system devices that draw current from the Due Fili Plus Bus.
** The device, when powered solely from the Bus, draws 150 mA, whereas if the 32 Vdc power supply unit is used
(20580, 19580, 14580) it draws 20 mA from the Bus.

Home Automation System Guide
6
Rules for installing the By-me system
Line installation topology
The By-me system is designed in such a way that the devices of a given line can be connected in practically any
order, with the exception of speaker system components.
When installing the system, it is advisable to select consumer units of the appropriate size and, depending on the
types of control devices adopted and the number of loads to be handled, to fit a suitably generous number of flush
mounting 3 and/or 4 module back boxes (V71303 and/or V71304).
The following basic requirements must always be taken into account when designing the system:
5. Do not create a loop circuit
Ensure that, after laying the Bus cable and connecting the devices, you do not create a loop type of circuit. This
type of structure does not guarantee that messages will transit correctly between devices.
Distances
Maximum distance between 1 power supply unit and the last device 350 m
Maximum distance between two components 700 m
Maximum length of the Bus cable for one line 1,000 m
Minimum distance between two power supply units on the same line 40 m
ALIMENTATORE
ALIMENTATORE
ALIMENTATORE
ALIMENTATORE
ALIMENTATORE
ALIMENTATORE
Line installation topologies
LINEAR MIXED
STAR
SUPPLY UNIT
SUPPLY UNIT
SUPPLY UNIT

Home Automation System Guide
7
Rules for installing the By-me system
6. Installing By-me controls
Check the correct direction (up/down) of installation of the By-me automation controls to avoid feature reversal
(On/Off, up/down and adjustment) when programming.
7. Resetting the devices when first switching on the control unit
After first switching on the By-me control unit, always manually reset all the automation and speaker system
devices in the system. This will avoid potential issues related to the same addresses being present in the
devices in the field.
BUS line The insulation of the two cores, tested
in accordance with CEI 20-20/2
standard, guarantees electrical
insulation from the power cables at
230 V~
The outer sheath
guarantees 400 V
electrical insulation
between terminals and
earth, in compliance
with
CEI UNEL 36762
Load connection terminals
(devices with actuator only)
Connecting the Bus cable
Control unit
The control unit 21509
can be flush-mounted in
a box V71303 (V71703
for light walls) or on a DIN
rail (60715 TH35) with the
mounting frame V51921
provided

Home Automation System Guide
8
Rules for installing the By-me system
Example of actuator-load wiring
8. Actuator-load wiring diagram
To quickly configure the system it is a good rule to have a detailed diagram of the connection of all the actuators
and their controlled loads as well as already have agreed with the customer on the points for switching on from
the various controls in the field.
01851.2
(lights)
Light 1 Light 2 Light 3 Light 4
SV
Temperature con-
trol with fan-coil
M
01851.2
(climate control)
Temperature
control
SV
01850.2
(climate control)
19541+(2)19531.20.B
+19531.S0.B
19541+(2)19531.20.B
+19531.S0.B
02951.B
(fan-coil)
19513.B
230 V~
N
L
Bus 1/0

Home Automation System Guide
9
Rules for installing the burglar alarm system
9. Scheduled maintenance of the back-up batteries
When there is the burglar alarm system it is essential to perform scheduled maintenance on all the batteries in
the back-up devices, sirens and radio frequency.
The burglar alarm system
The burglar alarm system can include up to 60 devices divisible into 30 groups or 9 distinct zones and, in combi-
nation with contact interfaces and radio frequency interfaces, will control technical alarms or allow the integration
of RF sensors installed in all those locations where it may not have been possible to prewire the building. Since
burglar alarm systems must remain powered up even in the absence of mains voltage, the devices in question
belong to Line 0 (Area 0) and are guaranteed auxiliary power in the event of an outage occurring.
The system is activated/deactivated/partitioned by means of numeric keypads, transponders or radio remote
controls and powered by way of one or two adapters and one or two back-up units (according to demand); as in
the case of the automation system, the burglar alarm system can be customized to meet different requirements,
such as the nature and layout of the rooms, the operating modes of the system, and the parameters of the various
components.
Example of burglar alarm system
Digital keypad01807 back-up unit
01809 + batteries
Bus + -
Contact
interface
01820,
01822,
01823,
01825,
01826,
01821
N/C contacts
Control
unit
01942
GSM communicator
01806
Outdoor
siren
Bus
IR detector Contact interface Gas stop detector
01401
Power supply unit
230 V~L N
By-me burglar alarm system data
Maximum number of devices 60
Number of groups 30
Maximum number of distinct zones 9

Home Automation System Guide
10
Rules for installing the sound system
10. Connecting in in-out mode
The speaker system lends itself to various constructions according to the needs and dimensions of the system.
When there is a speaker system line, it is important to remember that these devices must be connected in in-out
mode or, in the case of shunting, use the special "branch shunt" (article 01904).
Speaker system
The new type of transmission of musical information in digital form over the same Bus where the By-me operation
and configuration data transit requires some installation recommendations for the wiring and in the construction
of the system, while maintaining perfect integration with the By-me home automation system.
To facilitate installation a dark blue Bus cable (01840.B) has been introduced to identify the part of the system or
branches of the Bus dedicated to the speaker system easily and with no error.
Typical use in systems where many
devices can be installed separating the
automation system from the speaker
system (separate prearrangement).
In this case the separation is purely with
the wiring and not the logic: the speaker
system devices and the By-me devices
are configured on the same line.
01801
01902
By-me branch
Speaker system branch
Decoupler for By-me power
supply unit 01801
Power supply unit
Example 1: speaker system on the same logical branch (Area/Line), but with separate wiring.
Branch termination via jumper
Example 2: dedicated logic branch.
01801
01801
01845
01902 01902 01801
Decoupler for By-me pow-
er supply unit 01801
Power supply 01801 and decoupler for
By-me power supply
OPTIONAL: to add if necessary
Power supply unit
Line coupler
Power supply unit
Typical use in systems where there are many automation devices and it is necessary to add audio devices.
In this case, the speaker system devices are configured in a different line to the other By-me devices. The second power
supply and the dedicated decoupler are optional and must only be included when necessary for reasons of consumption.
Branch termination via jumper

Home Automation System Guide
11
Rules for installing the sound system
By-me branch. Free wiring
Speaker system branch. By-me devices cannot
be connected; In-out wiring (linear, not star);
max number of speaker system devices: 64.
The shunt for the By-me enables creating
By-me branches that contain a max of 10
automation devices.
Max no. of shunts 01903=64
The sound system shunt enables shunting
speaker system branches (max 2 01904 per
line).
Decoupler for By-me power supply for speaker
system. It must be inserted between the power
supply and the audio line; none of the By-me
devices between the decoupler and the power
supply are “seen” by the speaker system.
Typical use in systems where there is a single
prearrangement for the automation Bus and
the speaker system Bus (therefore not in
separate conduits).
This explains how it is possible to make a
completely integrated system with the By-me
automation and speaker system devices on the
same branch.
Legend
Warning: By-me devices are not connected
directly to the branch of the speaker system (blue
branch) but through special shunts or through
the devices of the speaker system (that have a
special terminal).
01903
01904
01902
Example 3: By-me automation and speaker system on the same branch.
01801
01801 01902
20581
20582
20582
20581
01901
01903
01904
01902
Decoupler for By-me
power supply unit
01801
By-me branch:
max 10 free wiring
devices
By-me branch:
max 3 devices
By-me branch:
max 3 devices
By-me branch:
max 3 devices
By-me branch:
max 3 devices
By-me branch:
free wiring
Power supply
unit
20582
20581
20581
20581
20581
01901
Branch termination via jumper
Power supply
unit

Home Automation System Guide
12
Rules for installing the sound system
Distances between transmitters and receivers
Maximum distance between a receiver and a transmitter with no intermediate shunts 300 m See diagram A
Maximum distance between a receiver and a transmitter with 1 intermediate shunt 200 m See diagram B
Maximum distance between a receiver and a transmitter with 2 intermediate shunts 100 m See diagram C
Speaker system constraints
In order to ensure correct system operation and complete functionality in the installation it is necessary to respect
the constraints given in the following tables:
Diagram A
RCA audio input
20587 20587
+ - + -
Flush mounting
speakers - 3 modules
20581
20582
Max 300 m
L R
Max 10 m with
cable sect. 1mm
2
Branch termination via jumper
Diagram B
+ +- -
+
+
-
-
21588 21588
01901
Flush mounting speakers - 8 modules (4+4)
Receiver
01904
20581
L
L
R
R
20587
20587
Flush mounting speakers
- 3 modules
20582
RCA audio input
Max 200 m
200 m
Max 30 m with
cable sect.
1.5mm
2
Branch termination via jumper

Home Automation System Guide
13
Rules for installing the sound system
RCA audio input
RCA audio
input
RCA audio
input
Max 30 m
with cable
sect.
1.5mm
2
Max 30 m with cable
sect. 1.5mm
2
Max 100 m
Diagram C
+ -
+
+
-
-+ -
20582
20582
01904
01904
20582
01908 01908
21588
21588
01901
01901
Surface mounting
speakers
Flush mounting
speakers - 8 modules
(4+4)
Receiver
Receiver
Shunt
Shunt
Max 200 m
Max 200 m
L
L
R
R
100 m
Branch termination via jumper
Max 200 m
Max 200 m

Home Automation System Guide
14
Rules for installing the sound system
20587 20587 Flush mounting speakers 3 W RMS - 3 modules
+ - + -
L R
Max 10 m with cable
sect. 1mm
2
01901
Receiver for DIN rail
Amplifier in 3+3 W RMS mode
Diagram F
+ - + -
01908 01908
Surface mounting
speakers 10 W
RMS
L R
Max 30 m with cable
sect. 1.5mm
2
01901
Receiver for DIN rail
Amplifier 10+10 W RMS
Diagram E
Distances between receivers and speakers
Distance between receiver 1+1 W RMS (14581, 19581, 20581) and speakers 10 m See diagram D
Distance between receiver 10+10 W RMS (01901) and speakers 30 m See diagram E
Distance between receiver 3+3 W RMS (01901) and speakers 10 m See diagram F
20587 20587
+ - + -
Flush mounting speakers - 3 modules
20581
L R Max 10 m with
cable sect. 1mm
2
Diagram D

Home Automation System Guide
15
Rules for installing the sound system
Amplifier Amplifier power
W RMS Speaker Speaker power WRMS
Max. distance
between amplifier
and speaker (m)
Cable
section
(mm
2
)
20581, 19581, 14581 1 + 1 20587 310 1
21588 10 30 1.5
01901 10 + 10
21588 10
30 1.5
01906 30
01907 30
01908 30
01901 3 + 3 20587 330 1
Distances between receivers and Bus power supply unit
With 1 receiver 20581, 19581, 14581 powered by Bus 300 m
With 2 receivers 20581, 19581, 14581 powered by Bus 150 m
With 3 receivers 20581, 19581, 14581 powered by Bus 100 m
With 4 receivers 20581, 19581, 14581 powered by Bus 75 m
Important
If the receivers (20581, 19581 or 14581) are powered directly by the Bus and not from the auxiliary power supply
unit (20580, 19580 or 14580), the distance from the system power supply unit (01801, 01400 and 01401) is
reduced:
Wiring development Condition 1 Condition 2
If AB < 300 m:
• no limit on position between RX and TX
If AB > 300 m:
• ensure that the maximum distance
between TX and RX is less than
300 m (see diagram G, H and I)
If Max (AB,AC,BC) < 200 m:
• no limit on position between RX and TX
If Max (AB,AC,BC) > 200 m:
• ensure that the maximum distance
between TX and RX is less than
300 m if there is no crossing of the
shunt or it is less than 200 m if the
shunt is crossed
If Max (CD,AB) < 200 m and Max (AD, BD, AC,
BC) < 100 m:
• no limit on position between RX and TX
If Max (CD,AB) > 200 m and Max
(AD, BD, AC, BC) > 100 m:
• ensure that the maximum distance
between TX and RX is less than
300 m if there is no crossing of the
shunt or it is less than 200 m if the
shunt is crossed or less than 100 m
if there are two shunt crossings
A B
A B
C
A B
C
D
Types of wiring

Home Automation System Guide
16
Rules for installing the sound system
These distances are without
auxiliary power supply units.
20581 20581 20581 20581
Max 75 m
01801 01902
Diagram H (receivers on the same branch)
Control devices
with two rocker
buttons and
amplifier
1+1 W RMS
Branch termination via
jumper
20581 2058120581 20581
Control devices with two
rocker buttons and amplifier
1+1 W RMS
Control devices with two
rocker buttons and amplifier
1+1 W RMS
Max 150 m Max 150 m
01801
01902
Diagram I (receivers on opposite branches)
Branch termination
via jumper
These distances are without
auxiliary power supply units.
RCA audio
input
20582
01901 01901
Diagram G
+ +
+ +
- -
- -
21588 21588
21588 21588
Flush mounting
speakers
- 8 modules (4+4)
Flush mounting
speakers
- 8 modules (4+4)
Receiver Receiver
L L
R R
300 m
TOTAL 600 m
300 m30 m 30 m

Home Automation System Guide
17
Rules for installing the sound system
As regards the number of devices that can be used on the branches of the speaker system the following restric-
tions apply:
Description Number Notes
Maximum No. of inputs (transmitters) 44 stereo channels
Maximum No. of “audio” devices
(inputs, outputs, accessories) 64 Limit fixed by the input impedance of
the “audio” nodes
No. of receivers not powered by Bus 64 – no. of inputs – no. of accessories
(shunts, decouplers, etc).
Total: max 64 devices (transmitters,
receivers, accessories). Each receiver
can choose the audio channel from the
4 available ones
No. of receivers powered by Bus
20581, 19581, 14581
A receiver powered via Bus consumes
as much as 15 By-me devices (for
example, max 4 devices per power
supply unit with power supply unit
01801)
The limits of the power supply units
apply:
01401 = 1280 mA
01801 = 800 mA
01400 = 400 mA
No. of decouplers 01902 2
Given the strong attenuation of the
signal due to the shunts, it is necessary
to make sure that the path between
a transmitter and a receiver does not
pass more than 2 of them
Max. No. of microphone modules
20586, 19586, 14586 8Possibility of making up to 8 different
selective calls
No. of By-me shunts 01903 64
Each shunt enables shunting a By-me
branch beginning from the “audio”
branch
No. of By-me devices that can be con-
nected to the By-me shunt 01903 10 In each shunt created by the decoupler
I can connect max 10 By-me devices
Maximum no. of branch shunts 01904 2
The shunt 01904 is used for shunt-
ing two new audio branches from a
speaker system line, making it possible
to create a star connection

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