Alpha Communications VM25WH Series Operating and maintenance manual

Copyright©2001,AlphaCommunications®,AllRightsReserved. AWD068 Rev. 1 (09/01)
VM25WH Video Monitor
Station (shown with
HT2006/10 10-Button Handset)
APPLICATION
The VMH25 series video-intercom system allows a
numberofVMH25seriesinsidemonitors,withHT2006
serieshandsetstations,tocommunicatewithoneormore
doorentrystationswith(orwithout)abuilt-incamera,and
with each other. When used as a door entry video-
intercom system, the VM25WH can view the caller,
speakwiththecaller,andactivateanelectricdoorrelease
(if required).
PROCEDURE
1. Read installation instructions for each unit to deter-
mineequipmentlocationandinstallationmethod.
2. Installhousingsandwiring.
3. Installequipment.
4. Check wiring and connect. Observe all local
and national electrical codes.
5. Apply power and check system operation.
VM25WH Series (Residential Type)
Video-Intercom Installation and Use
Instructions, used with the NH208TVU
SystemIntercomAmplifierUnit
HOUSING INSTALLATION AND
EQUIPMENT LOCATION
INSIDE MONITOR+HANDSET STATION(s)
Locate stations where needed at convenient speaking and
viewing height, about 4.5 feet (137 cm) from the finished
floor. Unit can be secured directly to the finished wall
surface or can be mounted over a single gang electrical
'gem' box or single gang electrical plaster ring.
DOOR ENTRY STATION(s)
Locate door entry station(s) at a convenient speaking (and
viewing)locationatthebuildingentrylocation(s).NOTE:
For best picture (video) quality DO NOT POINT
CAMERAINTODIRECTSUNLIGHT!!!
SYSTEM TRANSFORMER(s)
The SS146 and SS106 system transformers should be
connected to accessible sources of 117 VAC, preferably
within 50' (15 meters) of the VRU system power supply
and NH208TVU amplifier, but no closer than 3 feet (1
meter).
ELECTRIC DOOR OPENER (OPTIONAL)
The DO-001 (or equivalent 16VAC type) electric door
release is installed in the door jamb in place of the regular
door strike plate. It can be electrically operated by the
VM25WH video monitor with HT2006 handset station(s).
WIRING
INSIDE MONITOR+HANDSET STATION(s)
Between HT2006 master handsets, run 5 conductor
#22AWG(common)plus1-conductor(selective)#22AWG
cable from handset to handset (equal to no. of total
handsets on system). Add 1 additional #22AWG common
wire for any of the following options; 1 wire for each call
button at the door station; 1 wire for each button to be used
for electric door release; 1 wire for each paging zone; etc.
to the central equipment location (where the VRU and
NH208TVUunitsarefound). Runa6conductor #22AWG
cable from any of the HT2006 master handsets to the
NH208TVU at the central equipment location. Run 2
conductor #18AWG from each video monitor directly to
the corresponding VRU power supply unit. Cables may be
straight or twisted pair type and may be solid or stranded
conductors. Run an RG59/U coaxial cable as required,
either in a looped fashion (from one monitor to the next) or

2
FINISH INSTALLATION
1. Install all components. Do not overtighten screws.
2. Connect primary of all transformers to 117 VAC.
Observe all local and national electrical codes.
TEST AND CHECKOUT
1. At all remote monitor+handset stations, make certain the
handsets are completely hung-up on the handset cradle.
2. Check each monitor+handset unit in the system for
operation in accordance with the operating instructions.
3. Check for proper door release function (on systems with
door release capability.
4. On systems with multiples entrances, check for proper
operation from each calling entrance station.
NOTE: System warranty is void if this system is
installed or used in any manner other than described in
this manual.
OPERATING INSTRUCTIONS
TO PLACE A CALL TO THE REMOTE
MONITOR+HANDSET UNITS:
At the remote door entrance station, depress button (for a few
seconds)forvideomonitor+handsetyouwishtocall.Thiswill
signal the buzzer (or optional Alphatone™) signal at the
monitor handset, and will cause the video screen to light and
display the visitor. The resident may choose to ignore the
caller, or to lift the intercom handset to answer. Resident may
speak to the visitor by simultaneous 2-way (DUPLEX) voice.
If resident is satisfied with identity of caller and wishes to let
visitorintothebuilding,residentshallmomentarilydepressthe
door release (KEY) button on the handset, which will electri-
cally activate the door release mechanism. Monitor will time-
out automatically after approx. 40 seconds (unless the time-
outdurationhasbeenchangedbytheinstaller/user).NOTE:in
the lower right hand corner of each monitor unit is a button
marked 'ON'. Momentarily depressing this button will cause
the monitor to activate again, and will time out after the pre-
programmed delay time.
In systems with multiple door entry stations, the system will
automatically switch the voice, video and door release func-
tionstothelast entry station thatplacedacall(when used with
the appropriate multiple entrance adaptors).
CALLING FROM ONE HANDSET STATION TO
ANOTHER HANDSET STATION:
Lift the calling handset off of its cradle and depress the button
corresponding to the handset you wish to call, for a few
seconds. The electric buzzer inside the handset being called
willsoundaslongasthebuttonisdepressed.Waitfor theother
party to lift his/her handset to reply. Speak in a normal voice.
Conversationisfullduplextype(simultaneoustalkandlisten).
When conversation is completed, hang-up both handsets on
their cradles.
home-run directly from each monitor to its corresponding
VDU-4video distributorunit. Additionalcablesmaybeusedto
serve other monitors on other risers (lines). Depending upon
additionalsystemoptionsand/orfunctionsyoumayneedtorun
additional wires. Please consult the factory for more informa-
tion.RG59/Ucoaxcablemustbegoodquality,ALL COPPER,
with minimum 95% copper braiding. As with all systems, we
recommend running some spare wires, for future use.
Route cable away from AC power wiring, transformers,
fluorescent lights, light dimmers or other electrical devices.
Protectcablefromdamage.ShieldedcableshouldbeusedifAC
interference is a concern, or if cables cannot be run adequately
spaced away from any source of electrical interference.
DOOR ENTRY STATION
Run 3 conductor #22AWG cable from each speaker/micro-
phone to the NH208TVU amplifier. We recommend using
shielded cable from the speaker/microphone wires to the
NH208TVU amplifier/power supply. Run the #22AWG
pushbuttonwiringaswell.Routecableawayfrominsidestation
cable, AC power wiring, transformers, fluorescent lights, light
dimmers and other electrical devices. Protect cable from
damage. Shielded cable should be used if AC interference is a
concern.
DOORRELEASE
Run 2 conductor #18 from each door release location to the
central equipment location and NH208TVU amplifier unit.
Routeawayfromanystation wiring. Note: if wirerunislonger
than 50 feet (15m), use #16AWG cable.
CONNECTIONS
Before connecting, make certain wires are free from shorts or
grounds. Make connections as shown on the enclosed system
diagrams, and as indicated below.
NOTE: Please keep in mind that all wiring terminals
shown may not be in the actual order in which they
appear on the equipment. This is done for clarity of
wiring diagram purposes.
TRANSFORMER
1. Connect the SS146 and SS106 (16VAC) transformers to
the VRU power supply and NH208TVU amplifier unit(s),
respectively, where indicated. Do not use these
transformer(s) to power any other device(s).
2. Do not connect transformer primary to 117 VAC until
entire installation is complete and all wiring is checked.
DOORRELEASE
1. Connect 16 VAC electric door opener using 2 conductor
#18AWG (polarity not important). Route away from any
station wiring. Note: if wire run is longer than 50 feet
(15m), use #16AWG cable.

3
SpecialNoteAboutCALLINGHANDSETTOHANDSET:
Itisimportanttoliftthecallinghandsetoffofitscradle,BEFORE
depressingthepushbuttontocalltheotherhandsetstation.Ifyou
depressthepush buttonfirst,and thenliftthe callinghandset
cradle,thedoorstation(s)willnotbedisconnectedandtheinside
conversationmaybeheardatthedoorstation(s).Thisisduetothe
factthatwhenthehandsetsarehung-up,therelaythatdisconnects
thedoorstationisdis-engagedandre-enablesconversationatthe
doorstation(s).
TROUBLESHOOTING
If the system fails to operate as required, review operating
instructions again. If the equipment fails to operate as
indicatedintheinstructions,checkthefollowingpoints:
1. ENTIRE SYSTEM DEAD: Check for 16VAC at the
two (2) transformer secondaries; wiring between trans-
formerandamplifier/powersupplyunit(s);connectionsat
main power supply units, 117VAC at transformer pri-
mary, and check the (3 amp slo-blo European size) fuse
in the VRU power supply. If fuse is blown, replace with
our model #50T-3A.
2. NO CALL UP CHIME AT HANDSET: Check for
approx. 16VAC at terminals 'O' and 'R' on HT2006
handset, when entry station pushbutton is depressed.
Temporarily switch handset with one from a functioning
location. Check wiring connections at handset. Tempo-
rarily switch handset to another location that is function-
ing, and try again. Check that entry station pushbutton is
making contact, by shorting out the two (2) wires on the
back of the button. Check that the R2006 AlphaTone™
chime module is seated properly on the multi-pin connec-
tor or replace with one from a functioning handset
location.
3. NO BUZZER BETWEEN HANDSETS: Check for
approx. 16VAC at terminals 'Z' and 'S' (on HT2006
handset), when called from another handset. Temporarily
switch handset with one from a functioning location.
Checkwiringconnectionsathandsets.Temporarilyswitch
handset to another location that is functioning, and try
again. Check that wiring inside handset base is not
restricting movement of buzzer clapper. Replace handset
or buzzer with one from a functioning handset location.
4. NO PICTURE AT MONITOR: If screen is NOT
LIGHTING UP, check for approximately 16VDC at(+)
and (-) terminals on monitor PC board (VH250E or
VH250P). Check Brightness and Contrast controls on
front of monitor. If screen IS LIGHTING UP but there is
nopicture,youprobablyarenotgettingavideosignalfrom
the camera to the monitor. Starting at camera, check for
video signal through coax cable, and through (VDU-4)
video distributors (if used). Check for approx. 12VDC
power at each VDU-4 video distributor (if used). Check
coax connector at camera(s) to make sure it is not shorted
or open. Temporarily switch monitor PC board (VH250E
or VH250P) with one from a functioning location.
5. NO VOICE ON SYSTEM: Check volume control
potentiometeronNH208TVUamplifier.Check terminals
'T', 'O', and 'M' to handsets. Check speaker/microphone
connections at each entry station. Disconnect terminals
'T', 'O' and 'M' to system amplifier, and connect a single
handset to those terminals. If voice is working, amplifier
and entry speaker/microphone are O.K., so check riser
wiring. If not amplifier or speaker/microphone could be
faulty. Check by replacement.
6. UNABLETORELEASEDOORSTRIKE:Checkwiring
to handset terminals 'E' and '(1-5 or 1-10 depending upon
which one you are using for door release)'. Temporarily
remove door opener wire going to handset terminals '(1-
5 or 1-10)' and touch to terminal '8V' on NH208TVU.
Check operating voltage of door opener matches output
from system amplifier. Check wiring (and gauge) to door
opener, from amplifier/power supply. When using a
magnetic type lock or other 'fail-safe' type door lock, you
should use a reversing relay, such as our model# PK407A
for each entrance.
7. HUM OR BUZZ: Check system wiring installed too
close to power wiring or electrical devices or transform-
ers; check transformer(s) installed too close to control
equipment (should be at least three (3) feet away). Wiring
is being run next to wiring for other systems and/or
devices.
8. SQUEALINGORHOWLING:Checkwiring forpinch-
ing, crimping, crushing, shorting, or being too close to
another source of audio interference. Make sure correct
voltagetransformerisbeingusedtopowertheNH208TVU
amplifier.
9. MONITORS TIMING OUT TOO QUICKLY:
Check adjusting control potentiometer on VH250E (or
VH250P) PC board and adjust as needed from approx. 0
to 180 seconds. Calibration is not exact, so please check
timing after re-adjusting.
10. MONITORS DO NOT TIME OUT AT ALL:
Check for shorts and/or grounds on system. Temporarily
switch monitor with one from a functioning location.
Check that entry station pushbutton is not stuck or
shorted. Temporarily switch monitor PC board (VH250E
or VH250P) with one from a functioning location.
NOTE:Ifthesecheckpointsfailtoindicatetheprob-
lem, there may be an equipment fault. Contact the
factoryorqualifiedservicerepresentative.

4
INSTALLING THE R2006 AlphaTone™: For each
HT2006 series handset that needs to be signaled (called)
from the door entry station(s), you need to install the model
R2006AlphaTone™unit.Pleasefollowtheseinstructions:
1. Turn off the power to the system by disconnecting the
120VACprimarypowerswitchofdisconnecting1sideofthe
16VACtransformerfromtheNH208TVU.
2. Locate the 5-pin male connector found under the handset
cradle switch, on the handset's p.c. board.
3. Gentlyslidethefemale5-pinconnectorontheR2006p.c.board
ontothe5-pinmaleconnectoronthehandset'sp.c.board,with
thecomponentsideoftheR2006p.c.boardfacingdownwards.
Makesurethe5pinsalignproperlyandarenotbentorshorting
andthep.c.boardcut-outclearsthecradleswitchmechanism.
4. Peel the self-stick backing from the round black sounder
component and stick to the handset base. The best location
would be to the left of the (silver) electric buzzer.
5. Positionthewiresinsidethehandsetbase,sotheywillnotget
'pinched' when the cover is placed over the base.
6. Re-connectthepowertotheNH208TVUamplifier.
Place Black
Round Sounder
Component
Here
Black/Round
Sounder
Component
NOTE: Each HT2006 handset comes with a loose push
buttoncapwitha'KeySymbol'onit.If you are using one of
the 5 or 10 push buttons to activate an electric door release,
youmay(carefully)'pop-out'thenumberedcapand'pop-in'
the 'Key Symbol' cap, to make it easier to identify the door
release push button. You do not need to do this to make the
push button activate the electric door release.
Buzzer
VMH25 COMPONENT LISTING
ON
Not
Used*
Not
Used*
Monitor
'ON'
Button
TYPICAL REPLACEMENT PARTS
Model#NH208TVU:Intercomamplifierunit.One(1)requiredfor
systemforcall,intercomanddoorreleasefunctions.Requires
SS106transformerforpower.
Model#VRU:VideoMonitorPowerSupplyunit.One(1)required
foreachfour(4)(orless)monitors.RequiresSS146transformer
forpower.
Model# VDU-4:Four(4)outputVideoDistributor.One(1)required
foreachfour(4)(orless)videooutputstomonitorrisers/lines.
Requires12VDCpower(fromSS12Corequivalentsupply).
Model# TU1007A: Multiple Entrance audio switching adaptor.
Used to switch the voice (and door release) to the calling
entrance.One(1)requiredfor2entrances,two(2)requiredfor
3-4entrances,three(3)requiredfor5-6entrances,andfour(4)
required for 7-8 entrances. Used on systems with more than
one (1) entrance station.
Model# DPS-2(TUV2):MultipleEntrancevideoswitchingadap-
tor.Used (inaddition tothe TU1007A)to switchthe videoto
thecallingentrance.One(1)requiredfor2entrances,two(2)
requiredfor3-4entrances,three(3)requiredfor5-6entrances,
andfour(4)requiredfor7-8entrances. Usedonsystemswith
more than one (1) entrance station, where video switching is
required.
* These buttons and cap blanks are used on other systems
and do not apply to this configuration
Back of
R2006
P.C. Board

5
General Monitor Mounting and Wiring Information
Note: There are Black and Red pigtail wires coming from
terminals 'O' and 'LL' on the VH250E (or VH250P) P.C.
Board. The Black 'O' wire must jump to terminal 'O' on
the handset and the Red 'LL' wire must jump to terminal
'S' on the handset or the monitor will not activate when
the handset is signalled from the entrance station(s).
ON

6
TYPICAL WIRING DIAGRAM FOR SINGLE ENTRANCE SYSTEM
WITH S.T.R.™ STYLE CAMERA AND ONE (1) VIDEO RISER
(NO VIDEO DISTRIBUTORS) AND 1-4 MONITORS
Notes:
1. All wiring is #22AWG unless shown otherwise.
2. When using a PINHOLE type camera, instead of the standard S.T.R.™ type camera, see the special camera
installation and connection instructions found on page 9, and do not power as shown above.
3. The most recent NH208TVU has two (2) 'O' and '8V' terminals. They are duplicated for ease of wiring. You
may use either or both. Both sets are internally connected together inside the NH208TVU on the p.c. board.
4. DO NOT CONNECT MORE THAN 10 MONITORS PER VIDEO RISER/LINE.
5. Observe all local and national electrical and building codes.
6. All terminals connections shown may not be in the order that they appear on the equipment.
Notes:
AllModelHT2006/5(5-button)
Master Handsets shown. You may
also use HT2006/10 (10-button)
Master Handsets which basically wire
the same as the 5-button handsets,
except they also have terminals
'6' thru '10' as well as '1' thru '5'.
Terminals '1' thru '5' (on the HT2006/5)
and terminals '1' thru '10' (on the
HT2006/10) are the calling out
terminals and terminal 'Z' is the terminal
that determines the handset number
that is called.
This configuration shows a 1-button
door entry station that signals all four (4)
HT2006handsetssimultaneously.You
may use a multi-button door entry station,
by connecting the selective button wire(s)
to terminal 'R' on the corresponding HT2006
handset(s) being called by that button.
Each handset that is called by a door station
must have the model R2006 Alphatone™
signalingmodule installed (see page 4).
The Electric Door Opener shown in this
illustrationisactivatedbydepressingbutton
#5 on each of the HT2006 handsets. Each
HT2006 handset comes with a separate
plastic 'KEY SYMBOL' button that may
be substituted for the numbered door
release button used (if desired).

7
TYPICAL WIRING DIAGRAM FOR SINGLE ENTRANCE SYSTEM
WITH S.T.R.™ STYLE CAMERA AND MULTIPLE VIDEO RISERS
USING A SINGLE VDU-4 VIDEO DISTRIBUTOR UNIT
AND 1-4 MONITORS
Notes:
1. All wiring is #22AWG unless shown otherwise.
2. When using a PINHOLE type camera, instead of the standard S.T.R.™ type camera, see the special camera
installation and connection instructions found on page 9, and do not power as shown above.
3. The most recent NH208TVU has two (2) 'O' and '8V' terminals. They are duplicated for ease of wiring. You
may use either or both. Both sets are internally connected together inside the NH208TVU on the p.c. board.
4. DO NOT CONNECT MORE THAN 10 MONITORS PER VIDEO RISER/LINE.
5. Observe all local and national electrical and building codes.
6. All terminals connections shown may not be in the order that they appear on the equipment.
Notes:
AllModelHT2006/5(5-button)
Master Handsets shown. You may
alsouseHT2006/10(10-button)
Master Handsets which basically wire
the same as the 5-button handsets,
except they also have terminals
'6'thru '10'aswellas'1'thru'5'.
Terminals'1'thru'5'(ontheHT2006/5)
and terminals '1' thru '10' (on the
HT2006/10)arethecallingout
terminalsandterminal'Z'istheterminal
that determines the handset number
that is called.
This configuration shows a 1-button
door entry station that signals all four
(4)HT2006handsetssimultaneously.
You may use a multi-button door entry
station, by connecting the selective
button wire(s) to terminal 'R' on the
corresponding HT2006 handset(s)
being called by that button.
Each handset that is called by a door
station must have the model R2006
Alphatone™ signaling module
installed (see page 4).
The Electric Door Opener shown
in this illustration is activated
by depressing button #5 on each
of the HT2006 handsets. Each
HT2006 handset comes with a
separateplastic'KEYSYMBOL'
button that may be substituted for
the numbered door release button
used (if desired).
Note: For more
information on
the VDU-4, or
when connecting
multiple VDU-4
units together, for
more than 4 video
risers, see wiring
diagram#AWD061

8
TYPICAL WIRING DIAGRAM FOR DUAL ENTRANCE SYSTEM
WITH S.T.R.™ STYLE CAMERA AND ONE (1) VIDEO RISER
(NO VIDEO DISTRIBUTORS) AND 1-4 MONITORS
NOTE:Forsystemswithmorethantwo(2)
entrances, orotherconfigurations,please
consultthefactoryoryournearest
AlphaCommunications®distributor.
Notes:
1. All wiring is #22AWG unless shown otherwise.
2. When using a PINHOLE type camera, instead of the standard S.T.R.™ type camera, see the special camera
installation and connection instructions found on page 9, and do not power as shown above.
3. The most recent NH208TVU has two (2) 'O' and '8V' terminals. They are duplicated for ease of wiring. You
may use either or both. Both sets are internally connected together inside the NH208TVU on the p.c. board.
4. DO NOT CONNECT MORE THAN 10 MONITORS PER VIDEO RISER/LINE.
5. Observe all local and national electrical and building codes.
6. All terminals connections shown may not be in the order that they appear on the equipment.
Notes:
All Model HT2006/5 (5-button) Master Handsets shown. You
may also use HT2006/10 (10-button) Master Handsets which
basically wire the same as the 5-button handsets, except they also
have terminals '6' thru '10' as well as '1' thru '5'.
Terminals '1' thru '5' (on the HT2006/5) and terminals '1' thru '10'
(on the HT2006/10) are the calling out terminals and terminal 'Z'
is the terminal that determines the handset number that is called.
This configuration shows a 1-button door entry station that
signals all four (4) HT2006 handsets simultaneously. You may
use a multi-button door entry station, by connecting the selective
button wire(s) to terminal 'R' on the corresponding HT2006
handset(s) being called by that button.
Each handset that is called by a door station must have the model
R2006 Alphatone™ signaling module installed (see page 4).
The Electric Door Opener shown in this illustration is activated
by depressing button #5 on each of the HT2006 handsets. Each
HT2006 handset comes with a separate plastic 'KEY SYMBOL'
button that may be substituted for the numbered door release button
used (if desired).

9
ALPHA COMMUNICATIONS® • 42 Central Drive • Farmingdale NY 11735-1202
TOLL-FREE TECHNICAL LINE 1-800-666-4800 • Phone: [phone] • Fax: [phone]
INTERNET WEBSITE: http://www.alpha-comm.com • EMAIL: [email protected]
THESE ARE LOW VOLTAGE DC POWERED CAMERAS AND THEY ARE POLARITY SENSITIVE.
THE POLARITY IS AUTOMATICALLY CORRECT WHEN THE POWER SUPPLY MODULE IS PLUGGED DI-
RECTLY INTO THE CAMERA USING THE FACTORY INSTALLED CONNECTORS. IF IT IS NECESSARY TO
EXTEND THE DISTANCE BETWEEN THE POWER MODULE AND THE CAMERA, CUT AND SPLICE THE
WIRE ON THE POWER MODULE ONLY. IF IT IS NECESSARY TO REMOVE THE POWER CONNECTOR OR
CUT AND EXTEND THE POWER CABLE, IT IS VERY IMPORTANT TO MAKE SURE THAT THE POLARITY
IS CORRECT BEFORE POWER IS SUPPLIED TO THE CAMERA. USE A METER TO CHECK THE POLAR-
ITY OF THE NEWLY SPLICED CABLE BEFORE CONNECTING IT TO THE CAMERA.
THE CENTER PIN MUST BE POSITIVE!
USE ONLY THE SUPPLIED POWER SUPPLY! POWER SUPPLY IS FOR INDOOR USE ONLY.
DO NOT REMOVE THE SERIAL NO. STICKER, AS THIS WILL VOID THE WARRANTY.
IF YOU ARE USING A PINHOLE STYLE CAMERA(s)
IN PLACE OF THE STANDARD S.T.R.™ STYLE CAMERA(s)
CONNECT THE CAMERA(s) AS SHOWN ON THIS DIAGRAM,
AND NOT AS SHOWN ON THE PROCEEDING PAGES.
THESE CAMERAS ARE TYPICALLY USED WITH THE
NATURAL ANODIZED ALUMINUM,
STAINLESS STEEL AND POLISHED BRASS PANELS.
THESE CAMERAS ARE POWERED BY THEIR OWN
PLUG-IN POWER SUPPLY, WHICH IS SUPPLIED
WITH EACH CAMERA.
POLARITY MUST BE OBSERVED!!
Mini (Pinhole) Camera
(front view)
Twist-On (BNC) Connector
for RG59/U Coaxial Cable
(use model CONN360 or
equivalent connector)
Plug-In Connector for
Model SS12P 12VDC
Power Supply (included)
IMPORTANT INFORMATION AND WARNING: