Minicom iCentral Instruction Manual

Rev 2
MINICOM
INTERCOM SYSTEM
INstallatION & User’s MaNUal

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Minicom Installation & User’s Manual Rev 2
Document Part No. 890-434
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iCENTRAL MINICOM INSTALLATION MANUAL
1
CONTENTS
INSTALLATION INSTRUCTIONS
GENERAL INFORMATION.......................................................................... 2
LOCATION OF EQUIPMENT....................................................................... 3
WHERE TO RUN CABLE ............................................................................ 4
WHAT CABLE TO USE ............................................................................... 4
MAXIMUM LENGTH FOR CABLE RUNS ................................................... 5
INSTALLATION OF R70 ROOM STATIONS............................................... 6
INSTALLATION OF D70 DOOR STATIONS ............................................... 6
WIRING DIAGRAMS.................................................................................... 7
CABLE TERMINATIONS ............................................................................. 8
DOOR STATION ADJUSTMENTS .............................................................. 9
CHANGING THE CHIME ........................................................................... 10
CHIME (CH) OUTPUT................................................................................ 11
LOCK (LK) OUTPUT.................................................................................. 12
WIRING LOCK (LK) & CHIME (CH) OUTPUTS ........................................ 12
CABLE FUNCTIONS ................................................................................. 14
CABLE COLOUR CROSS REFERENCE .................................................. 14
USER INSTRUCTIONS
INTRODUCTION ........................................................................................ 16
PARTS IDENTIFICATION.......................................................................... 17
CALLING ROOM STATIONS .................................................................... 18
CALLING DOOR STATIONS..................................................................... 18
ACTIVATING DOOR CHIME ..................................................................... 19
ACTIVATING LOCK OUTPUT................................................................... 19
ADJUSTING VOLUME CONTROLS.......................................................... 19
TROUBLE SHOOTING .............................................................................. 20
SPECIFICATIONS...................................................................................... 21

iCENTRAL MINICOM INSTALLATION MANUAL
2
GENERAL INFORMATION
The following general procedures must be observed in relation to the location and
installation of Minicom components:
 Stations are not to be installed “back to back” or in “line of sight” of each other
as this will cause feed-back (squealing).
 Where stations are to be fitted externally, appropriate measures to provide
weather protection are to be taken.
 Avoid running intercom cable parallel to electrical wiring.
 The plugpack should be located in an area with sufficient space to dissipate heat.
 Guidelines for maximum cable lengths as set out in this manual are to be observed
to avoid the possibility of operating problems due to excessive voltage drop.
 The maximum number of Room and Door stations used in a system is generally
limited to 4 in total.
CAUTION: Failure to use specified cable may cause problems with the
performance of the system.
IMPORTANT: Responsibility will not be taken for problems that arise from the
improper use of cable or interference generated externally to the
system.
Interference by light dimmers, fluorescent lighting and similar
electrical products, must be corrected at the source.
An aid to reducing the effects of this type of interference is to place
stations and wiring no closer than 30cm (12”) from any AC device
or wiring.
The circuitry of the intercom has been designed to minimize the
effects of Radio Frequency Interference however, total immunity to
this type of interference cannot be guaranteed where the levels of
interference generated are extreme.

iCENTRAL MINICOM INSTALLATION MANUAL
3
LOCATION OF EQUIPMENT
 Careful consideration must be given to present and/or future layout of furniture so
as not to locate stations in inappropriate positions.
 To avoid audio feedback, stations should be kept at least four to five metres away
from other stations. Never have more than one station in any one room and avoid
mounting stations in the same wall cavity i.e. directly below and above one another
in a two storey house.
 A suitable height is generally 1400 millimetres from the floor to the centre of the
unit.
 Stations located on timber frame walls should be located adjacent to a stud to
allow firm fixing.
 Stations located on cavity brick walls will require the installation of wall boxes.
 Stations installed on single brick walls will require wall boxes and the cable will
need to be run in conduit and chased into the brick wall.
 Where stations are required in bathrooms or laundries, they must be kept clear of
water or steam.
 Where stations are mounted outside and are exposed to weather, the fitting of
weatherproof covers is required.
 Stations must not be installed in saunas.
 Where Door Stations are to be installed in solid brick or concrete columns at a front
gate, it is required that underground rated cable be used and run in conduit from
the station to below ground level and back to the house.
 Suggested locations for the plug pack are kitchen cupboards, pantry, bedroom
wardrobes etc.
 The plug pack is usually located no less than 1 metre and not more than 5 metres
from the point of connection at a room station.
 It is an advantage to have the plugpack located so it can be easily turned off if
required.

iCENTRAL MINICOM INSTALLATION MANUAL
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WHERE TO RUN CABLE
Cables can be situated:
 In the roof space
 In false ceilings/bulkhead area
 Within internal and external walls
 Under floors (subject to access being available)
Note: Intercom cables should be run as far away from AC wiring as practicality
permits.
Avoid running intercom cable parallel to any AC or other type of wiring.
Running across at right angles is acceptable where necessary.
Allow additional cable at each station for the purpose of termination.
In the case of cavity brick walls, ensure the wires are pulled through one of the
holes at the rear of the wall box.
WHAT CABLE TO USE
General
Minicom requires cable with a minimum of 5 conductors (2 twisted pairs + 1 additional
conductor) for operation.
The system may be Star Wired from a central point or Loop Wired however the
number of stations on a loop is governed by the length of the loop.
See section “Maximum Length For Cable Runs”.
Note: Different cables have different characteristics hence it is recommended that
either ‘CAT5’ cable, ‘Telephone’ cable or ‘Valet’ cable, be used on all new
installations. Many other cables will work acceptably however responsibility
cannot be taken for problems that arise from the use of other cables. Where
Valet cable is used, the shielded cores should be used for the Control (Con)
terminals. Underground cable should be rated for underground use and
run in conduit.
Power Supply
The Plug Pack supplied with the kit is fitted with a length of Figure 8 cable which
should be of adequate length for most installations.
Should this cable need to be extended, cut the existing cable about 30cm from the
plug pack and join a piece of heavy duty figure 8 cable of required length.
Ensure correct polarity (‘+’ & ‘-‘) is observed.

iCENTRAL MINICOM INSTALLATION MANUAL
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MAXIMUM LENGTH FOR CABLE RUNS
The system may be Star Wired from a central point or Loop Wired however the
number of stations on a loop is governed by the length of the loop and also the voltage
output of the power supply used.
The table below shows the relationship between the power supply used, length of a
cable run and the number of stations permitted on the run.
Note: The starting point to determine the length of a cable run is taken from the
station where the plug pack is connected.
CABLE RUN LENGTH V’s NUMBER OF STATIONS ON RUN
Distance Using 13.8V Supply Distance Using 12V Supply No of Stations On Run
200 metres 120 metres One station on run
100 metres 60 metres Two stations on run
65 metres 40 metres Three stations on run
50 metres 30 metres Four stations on run
Note: These maximum distances can be doubled where required by using spare
conductors in the cable so that two conductors are used for POS and two
conductors are used for NEG.
It is vitally important that the number and type of conductors used for POS and
for NEG are exactly the same.

iCENTRAL MINICOM INSTALLATION MANUAL
6
INSTALLATION OF R70 ROOM STATIONS
Room Stations in Timber Frame Walls
 Cut hole in wall lining keeping one side of the cutout adjacent to a stud so as to
allow firm fixing.
 Fit room station housing into cutout and mark positions for wall fixing attachments.
Remove housing and fit any required wall fixing attachments to the wall.
 Pull any cabling through the room station back housing and fit the back housing
into the cutout and secure to the wall.
 Strip back the outer white covering of the cable (approximately 80 mm), then strip
the individual wires (6 mm).
 Fix all wires into the appropriate screw terminals. (See diagram page 8)
Screw metal chassis plate to back housing using 6 x small PT screws provided.
Fit optional plastic trim (if applicable) around protruding part of back housing.
 Clip plastic front, over metal chassis plate, to back housing.
Room Stations in Cavity Brick Walls
 Remove the brick and mortar and insert the metal wall box ensuring that all cables
are first pulled through the holes in the rear of the wall box.
 Installation is then the same as for timber frame walls.
INSTALLATION OF D70 DOOR STATIONS
 Depending on the type of wall to which the station is to be affixed i.e. timber or
brick, installation is much the same as for room stations.
 Where stations are exposed to weather, a weatherproof cover should be fitted
using silicone between the weather shield and the wall, sealing the top and side
edges of the weather shield.

iCENTRAL MINICOM INSTALLATION MANUAL
7
WIRING DIAGRAMS
ROOM
STATION
DOOR
SUPPLY
PLUG
PACK
ROOM
ROOM
DOOR
STATION
STATION
STATION
CHIME RELAY
DOOR STRIKE RELAY
INTERCOM CABLE
FIGURE 8 CABLE
STAR WIRED
OR
PLUG
PACK
DOOR STRIKE RELAY
DOOR
MECHANICAL CHIME RELAY
STATION STATIONSTATIONSTATION
ROOMROOMROOM
INTERCOM CABLE
FIGURE 8 CABLE
LOOP WIRED
* Overall length of cable run is determined from the first room station to the door
station. See section “Maximum Length For Cable Runs”

iCENTRAL MINICOM INSTALLATION MANUAL
8
CABLE TERMINATIONS
POS
NEG
CON
COM1
COM2
BROWN
BROWN / WHITE
ORANGE
BLUE
BLUE / WHITE
VR901 ROOM STATION 105-422
CAT5 Cable
D70 DOOR STATION 105-819
VR2
E1 VR1
PROG
SEL
NOTE: Plug pack can be wired into “POS” & “NEG” at any station.
See “Maximum Length For Cable Runs” in relation to Plug Pack location.

iCENTRAL MINICOM INSTALLATION MANUAL
9
DOOR STATION ADJUSTMENTS
There are 2 adjustments on the door station which may require fine tuning after
installation.
NOTE: A flat bladed screw driver with a blade width of between 2mm and 2.4m is
required for these adjustments.
The use of an incorrect screw driver may result in the pot being damaged.
Speaker Volume
Speaker volume at the door station is adjusted by means of a miniature trim pot (VR1).
- See diagram below.
Turning this pot will vary the speaker volume.
This adjustment is best made while someone is communicating to the door station
from one of the internal stations.
Chime Volume
The chime volume is adjusted by means of a miniature trim pot (VR2).
- See diagram below.
Turning this pot will vary the chime volume throughout the entire system.
Before making an adjustment to this pot, adjust the slide volume control at each of the
internal stations so that communication can be heard at an acceptable level.
This door station pot (VR2) should then be adjusted so the chime comes through at an
acceptable level, at the internal room stations.

iCENTRAL MINICOM INSTALLATION MANUAL
10
CHANGING THE CHIME
The chime melody can be changed to any one of ten options by means of the two
programming switches (SEL & PROG) situated on the door station circuit board as
indicated below.
D70 DOOR STATION 105-819
VR2
E1 VR1
PROG
SEL
Procedure
Press the Program button (PROG) – The red LED illuminates and the current chime
plays.
Press the Select button (SEL) – The next chime option plays.
Repeatedly press the Select button until the desired melody is heard.
Press the Program button to lock in selection – The red LED flashes.
Press the Program button again to exit program mode – The red LED extinguishes.
NOTE: Pressing the Select button after all ten chime options have been sampled, will
return to the first chime option.

iCENTRAL MINICOM INSTALLATION MANUAL
11
CHIME (CH) OUTPUT
The “CH” Terminal provides an output voltage whenever the chime button is pressed.
The duration of this output voltage is set by 1of 4 programming options.
Chime Voltage Output Options
 Option #1 Single flash - Voltage present for duration of Bell Press
 Option #2 Double flash - Voltage present for duration of Chime
 Option #3 Triple flash - Voltage present for 10 seconds from moment of Bell Press
 Option #4 Quad flash - Voltage present for 30 seconds from moment of Bell Press
The chime output voltage duration can be changed by means of the two programming
switches (SEL & PROG) situated on the door station circuit board as indicated below.
D70 DOOR STATION 105-819
VR2
E1 VR1
PROG
SEL
Procedure
Press the Program button (PROG) – The red LED illuminates and the current chime is
played.
Press the Program button again to select the voltage output option mode – The red
LED flashes the current output CH output option.
Press the Select button (SEL) – The next output option is displayed.
Repeatedly press the Select button until the desired CH output option is displayed.
Press the Program button again to lock in the selection and exit program mode – The
red LED extinguishes.
NOTE: Pressing the Select button after all 4 output options have been sampled, will
return to the first output option.

iCENTRAL MINICOM INSTALLATION MANUAL
12
LOCK (LK) OUTPUT
The “LK” terminal at the door station provides an output voltage (to activate an
automatic gate or electric door strike) whenever the “HOUSE” and “DOOR” buttons
are pressed simultaneously at any room station.
WIRING LOCK (LK) & CHIME (CH) OUTPUTS
The Lock output (LK) and Chime voltage output (CH) will provide 12 Volt DC @ 50mA
which can be used to power up relays which in turn will switch voltage to the device
being used.
WARNING Using these outputs to drive a resistive load of less than 240 ohm may
result in damage to the output transistors. Check coil resistance of relays
to be used with a multimeter.
LK-
+
CH-
N.C.
COM
N.O.
N.C.
COM
N.O.
RELAY 12 V DC *
*RELAY COIL RESISTANCE SHOULD NOT BE LESS THAN 240 OHM
RELAY 12 V DC *
DOOR STATION

iCENTRAL MINICOM INSTALLATION MANUAL
13
POWERING ELECTRIC STRIKE FROM DOOR STATION
CON
POS
N.C.
COM
N.O.
*RELAY COIL RESISTANCE SHOULD NOT BE LESS THAN 240 OHM
RELAY 12 V DC *
NEG
+
LK-
DOOR STATION
STRIKE
ELECTRIC
POWERING ELECTRIC STRIKE FROM SEPARATE PLUG PACK
POS
N.C.
COM
N.O.
*RELAY COIL RESISTANCE SHOULD NOT BE LESS THAN 240 OHM
RELAY 12 V DC *
NEG
+
LK -
DOOR STATION
ELECTRIC
STRIKE
OPERATING AUTOMATIC GATES
N.C.
COM
N.O.
*RELAY COIL RESISTANCE SHOULD NOT BE LESS THAN 240 OHM
RELAY 12 V DC*
+
LK-
AUTOMATIC
GATES
DOOR STATION
OPERATE LOCK ONLY AT DOOR STATION WHERE CHIME ACTIVATED
LK-
+
CH-
N.C.
COM
N.O.
N.C.
COM
N.O.
RELAY 12 V DC *
*RELAY COIL RESISTANCE SHOULD NOT BE LESS THAN 240 OHM
RELAY 12 V DC *
DOOR STATION
POS
NEG
CON
STRIKE
ELECTRIC
Program Chime Output Voltage to Option #4
Lock will activate only at this station and only
within 30 seconds of chime being activated
-
-

iCENTRAL MINICOM INSTALLATION MANUAL
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CABLE FUNCTIONS
POS 12 to 13.8 VDC
NEG 0 VDC
CON
CONTROL - Carries different voltage levels generated by initiating station to
allow targeting of calls etc. Control voltage are present for duration of button
press or chime activation
COM1
COM2
COMMUNICATION LINES - Carry balanced audio signals for Chime
and communication.
CABLE COLOUR CROSS REFERENCE
CAT5 Cable Telecom Cable Valet Cable
POS Brown Red Red
NEG Brown / White Black Black
CON Orange Orange Shielded Cores
COM1 Blue Blue Blue
COM2 Blue / White White White

Rev 2
MINICOM
INTERCOM SYSTEM
User’s MaNUal

iCENTRAL MINICOM USER MANUAL
16
INTRODUCTION
The MINICOM Home Communication System is designed to be installed using up to 4
stations in total, offering convenience and simplicity of operation.
Features include:
 Communication to and from all other room stations
 Communication to and from door stations
 Door/Gate release (optional)
 Choice of 10 programmable door chimes
 Automatic reset circuitry so you do not have to remember to reset any switches after
making an intercom call
To assist in the understanding of the operation of this system, it is recommended you
follow the order in which the instructions are set out.

iCENTRAL MINICOM USER MANUAL
17
PARTS IDENTIFICATION
Door/Gate Station
Room Station
1 BELL PRESS BUTTON 4 MICROPHONE ACTIVE L.E.D.
2 VOLUME CONTROL 5 DOOR CALL BUTTON
3 HOUSE CALL BUTTON

iCENTRAL MINICOM USER MANUAL
18
CALLING ROOM STATIONS
To call other room stations:
 Press and hold the ‘HOUSE’ button (4) at any room station
(The green light (3) will turn on indicating your microphone is active)
 Commence your conversation and release the ‘HOUSE’ button to listen for a reply
(The green light (3) will turn off at the station initiating the call and will turn on at all
receiving stations as a signal for the person receiving the call to reply)
- Those replying to a call need not press any buttons. All replies are ‘hands free’
 Continue the conversation by pressing the ‘HOUSE’ button to talk and releasing the
‘HOUSE’ button to listen
 When the conversation is complete the system will reset after approximately 15
seconds from when the ‘HOUSE’ key was last released
Note: Stations with volume controls set to minimum will not receive communication.
CALLING DOOR STATIONS
To talk to a visitor at the Front Door or Gate:
 Press and hold the ‘DOOR’ button (5) at any room station and commence the
conversation (The green light (3) will turn on)
 Release the ‘DOOR’ button to listen to reply
- The visitor does not have to press anything.........just talk
(The green light (3) will turn off)
 Continue the conversation by pressing the ‘DOOR’ button to talk and releasing the
‘DOOR’ button to listen
 When the conversation is complete the system will reset after approximately
15 seconds from when the ‘DOOR’ button was last released