Omega LDP-144 Series User manual

LDP-124, LDP-126, LDP-144 AND LDP-146
OPERATOR´S MANUAL FOR CLOCK MODELS
http://www.omega.com
e-mail: info
@ omega.com
User's Guide

OMEGAnetOn-Line Service Internet e-mail
http://www.omega.com [email protected]
Servicing North America:
USA: OneOmegadrive,Box4047
ISO9001Certified Stamford,CT06907-0047
Tel:[phone] Fax:[phone]
e-mail:[email protected]
Canada: 976Bergar
Laval(Quebec)H7L5A1
Tel:[phone] Fax:[phone]
e-mail:[email protected]
For immediate technical or application assistance:
USAandCanada: SalesService:1-800-826-6342/1-800-TC-OMEGASM
CustomerService:1-800-622-2378/1-800-622-BESTSM
EngineeringService:1-800-872-9436/1-800-USA-WHENSM
Telex : 996404 EASYLINK : 62968934 CABLE : OMEGA
Mexicoand
LatinAmerica: Tel:[phone] Fax:[phone]
EnEspañol:[phone] e-mail:[email protected]
Servicing Europe:
Benelux: Postbus8034,1180LAAmstelveen,TheNetherlands
Tel:[phone] Fax:[phone]
TollFreeinBenelux:08000993344
e-mail:[email protected]
CzechRepublic: ul.Rudearmady1868,73301Karvina-Hranice
Tel:[phone] Fax:[phone]
TollFree:0800-1-66342 e-mail:[email protected]
France: 9,rueDenisPappin,78190Trappes
Tel:[phone] Fax:[phone]
TollFreeinFrance:0800-4-06342
e-mail:[email protected]
Germany/Austria: Daimlerstrasse26,D-75392Deckenpfronn,Germany
tel:[phone] Fax:[phone]
TollFreeinGermany:0130112166
e-mail:[email protected]
UnitedKingdom: OneOmegaDrive,RiverBendThecnologyCentre
ISO 9002 Certified Northbank,Irlam,Manchester
M445EX,England
Tel :[phone] Fax :[phone]
TollFreeintheUnitedKingdom:0800-488-488
e-mail:[email protected]
ItisthepolicyofOMEGAtocomplywithallworldwidesafetyandEMC/EMIregulationsthatapply.OMEGAis
constantlypursuingcertificationofitsproductstotheEuropeanNewApproachDirectives.OMEGAwilladdthe
CEmarktoeveryappropriatedeviceuponcertification.
Theinformationcontainedinthisdocumentisbelievedtobecorrect,butOMEGAEngineering,Inc.acceptsnoliabilityforanyerrorsitcontains,
andreservestherighttoalterspecificationswithoutnotice.
WARNING:Theseproductsarenotdesignedforusein,andshouldnotbeuserfor,patientconnectedapplications.
Page :1

Page : 2
CONTENTS
DESCRIPTION SECTION PAGE
===========================================================================
IMPORTANT SAFETY CONSIDERATIONS 13
UNPACKING AND INSPECTION 24
MAIN FEATURES 34
MODELS 45
MODEL LDP-1XX-C0, DISPLAY TIME USING THE FORMAT MM : SS 4.1 5
MODEL LDP-1XX-C1, DISPLAY TIME USING THE FORMAT HH : MM 4.2 5
MODEL LDP-1XX-C2, DISPLAY TIME USING THE FORMAT HH : MM : SS 4.3 5
GENERAL SPECIFICATIONS 56
FRONT VIEW, DESCRIPTION 67
REAR VIEW, DESCRIPTION 77
WIRING 88
POWER SUPPLY, RECOMMENDED WIRING 8.1 8
FUSES 8.2 8
CONTROL LINES, ALARM AND SERIAL OUTPUT 8.3 8
NOTES 8.4 8
EXCITATION VOLTAGE FOR SENSORS 8.5 9
POWER- UP AND OPERATION 99
REAL TIME CLOCK 9.1 9
RUN TIME CLOCK 9.2 9
UP / DOWN TIMING 9.2.1 9
CONNECTIONEXAMPLES 9.2.2 10
RUN TIME ALARM SETTING 9.3 10
SERIAL DATA OUTPUT 9.4 10
CONFIGURATION 10 10
POWER SELECTION 10.1 10
INSTRUMENT CONFIGURATION 10.2 10
CONTROL BOARD POSITION 10.2.1 11
DIP SWITCH AND JUMPERS LOCATION 10.2.2 11
DIP SWITCH CONFIGURATION 10.2.3 11
JUMPERS CONFIGURATION 10.2.4 12
SERIAL DATA OUTPUT CONFIGURATION 10.2.5 12
INSTALLATION 11 13
MECHANICAL DIMENSIONS 12 13
APPENDIX 1: LDP-1XX-CX AS SLAVE REPEATER 14
APPENDIX 2: TIME-NET CONFIGURATION AND CONNECTIONS 15
WARRANTY 16
OTHER PRODUCTS 17

Page : 3
INSTALLATION
PRECAUTIONS.- Theinstallationandthe
future use of this unit
must be done by suit-
able qualified person-
nel.TheunithasnotAC
(mains)switch,itwillbe
inoperationassoonas
power is connected.
The installation must
incorporateanexternalmainswitch.
The unit has a protection fuse incorporated on the AC socket, if it is
necessarytochangeor replace,usethetimelagfuseaccordingIEC
127/2andthevaluesindicatedbelow.
200 mA when the unit is operating at 230 Vac
400 mA when the unit is operating at 115 Vac.
Install also the necessary devices to protect the operator and the
process when using the unit to control a machine or process where
injurytopersonnelordamagetoequipmentorprocess,mayoccuras
a result of failure of the unit.
Seeparagraph8,WIRINGandparagraph10,CONFIGURATIONand
checkthatalljumpersareonthe correct position.
SAFETY PRESCRIPTIONS.-
TheunithasbeendesignedandtestedunderEN-61010-1rulesand
isdeliveredingoodcondition.Thisopera-
tor's manual contains useful information
for electrical connections. Do not make
wiring signal changes or connections
whenpoweris
applied to the unit. Make signal connec-
tionsbeforepowerisappliedand,ifrecon-
nection is required, disconnect the AC
(mains) power before such wiring is at-
tempted.
Installtheunitin placeswithagoodventilationtoavoidtheexcessive
heating.Andfarfromelectricalnoisesourceormagneticfieldgenera-
torssuchaspower relays, electricalmotors,speedcontrolsetc...
The unit cannot be installed in open places. Do not use until the
installationisfinished.
POWERSUPPLY.-
Thepowersupplymustbeconnectedtotheadequateterminals (see
theconnectioninstructions).Thecharacteristicsofthepowersupply
areshowedonthelabelontherearpart.Pleasemakesurethattheunit
is correctly connected to a power supply of the correct voltage and
frequency.
Donotuseotherpowersupplyotherwisepermanentdamagemaybe
causedtotheunit.
Donotconnecttheunittopowersourcesheavilyloadedortocircuits
which power loads in cycle ON-OFF or to circuits which power
inductiveloads.
SIGNALWIRING.-
Certainconsiderationsmustbegivenwheninstallthesignalinputand
control wires. If the wires are longs can act like an antenna and
introducetheelectrical noisetothe unit,therefore:
Donotinstallthesignalinputorcontrolwiresinthesameconduitwith
power lines, heaters, solenoids, SCR controls etc....and always far
fromtheseelements.
When shielded wires are used, connect the shield to the common
terminalandleaveunconnectedtheotherendoftheshieldanddonot
connecttothemachineground.
1.- IMPORTANT SAFETY CONSIDERATIONS
SAFETY CONSIDERATIONS
PRESCRIPTIONS.-
Before starting any operation of adjustment, replacement,
maintenanceorrepair,theunitmustbedisconnectedfromanykind
ofpowersupply.
Keeptheunitclean,toassure goodfunctioning andperformance.
Use for it a clean and humid rag. Do not use for the frontal lens
abrasiveproducts,solvents,alcohol,etc...becauseitstransparence
couldbedamagedand this may causedifficultyfora correct vision
ofthereading. Topreventelectricalor
fire hazard, do not ex-
posetheunittoexces-
sivemoisture.
Donotoperatetheunit
inthepresenceofflam-
mablegasesorfumes,
suchasenvironment
constitutes a definite
safetyhazard.Theunit
isdesignedtobe mounted inametalpanel.
Iftheunitshowssignsofdamage,orisnotabletoshowtheexpected
measures, or has been stored in a bad conditions or a protection
failurecanoccur,thendonotattempttooperateandkeeptheunitout
ofservice.
IN CASE OF FIRE
1.- Disconnect the unit from the power supply.
2.-Givethealarmaccordingtothe local rules.
3.-Switchoffalltheairconditioningdevices.
4.-Attackthefirewith carbonicsnow,donotuse waterinanycase.
WARNING : In closed areas do not use systems with
vaporizedliquids.
CONNECTIONS
All wiring connections are made using push-in and Sub-D cable
connectors.
There is a separate connector block for power supply and
input&controlsignal.Pleasemakesurethateachconnectorblockis
connectedontheadequateplace.
Thewirecrosssection recommendedforpowersupply is2.5mm2.
PANEL MOUNTING
Verifythatthepanelcut-outiscorrectlyaccordingtothedimensions
indicated on page 13 with a minimum depth of 150 mm. (5.9").
Install the fixation pieces in the lateral guides of the unit by its rear
partandthenturnthescrew firmlyagainstthepanel,untiltheunitis
totallyholdon.
Seeparagraph12 onpage13.

Page : 4
2.- UNPACKING AND INSPECTION
It is advisable to do a detailed reading of this Manual before mounting the instrument. This Operator's Manual
contains all the technical specifications : electricals as well as mechanics, both necessary to do a correct
installation and also a good use of the instrument.
At the same time the user will acquire the knowledge needed to obtain the best performances of the product.
Check that inside the present cardboard box, there are the following :
1 Instrument Model LDP-1XX-C0, C1 or C2.
1 Operator's Manual.
1 Connector for Power Supply.
1 Screw-clamp connectors, 4 pins female for alarm output.
1 Sub-D male connector of 9 pins and 1Sub-D female connector of 15 pins
2 Pieces for fixing the unit against the panel.
If there are some doubts or inquiries about the present instrument, please contact OMEGA
ENGINEERING´S customer service department.
When the shipment arrives remove the Packing List and verify that you have received all equipment.
Then inspect the box and the instrument, and if there is evidence of damage caused by bad handling during
the transport, it is advisable to make a careful inspection of all damages making a note of all of them and to
pass on this information directly to the Transport Company.
If this occurs but with insured material, ask the Transport Company for instructions about submitting a claim
3.- MAIN FEATURES
The Large Displays for real time clock (12 or 24 hours) or run up or run down clock are made up of
four different series.
The clock accepts inputs from contact closure and other sensor inputs to start, stop and reset the run
time clock.
Transducer excitation of 15 Vdc nominal is available. The units feature a run time alarm with optically
isolated transistor switch output, and RS422 level two wire transmission of the displayed time.
The main features of each serie are the following :
Serie LDP-124-XX : 4 digits type LED, seven segments, red or green colour with 57 mm (2.3") height.
Serie LDP-126-XX : 6 digits type LED, seven segments, red or green colour with 57 mm (2.3") height.
Serie LDP-144-XX : 4 digits type LED, seven segments, red or green colour with 100 mm (4") height.
Serie LDP-146-XX : 6 digits type LED, seven segments, red or green colour with 100 mm (4") height.
The complete reference for each instrument is obtained replacing the ""XX" by the corresponding
references for every Model (C0, C1 & C2). See paragraph 4.

Page : 5
The common features for all series are the following:
MECHANICAL.- Housed in a rugged extruded aluminium profile housing for panel mounting or free
standing. Finished in anodized black colour. The frontal lens is mounted with a special
rubber profile which provides the front part of the unit with an IP-65 protection.
CONTROL SIGNALS .- Threeinputs,sharingonecommonreturn.Theoperatingmodedependsoninterlinking
of the three control lines
CONNECTIONS.- For output alarm are made using one screw-clamp connector of 4 terminals located on
the rear part of the unit.
Forcontrolsignals are madeusingoneSub-D connector of 15terminalslocatedon the
rear part of the unit.
For serial data output are made using one Sub-D connector of 9 terminals located on
the rear part of the unit.
The recommended wire cross section is 0.5 mm2.
For Power Supply uses a push-in cable connector with 2 terminals for power and 1
terminal for earth ground.
The recommended wire cross section is 2.5 mm2.
The fuse is located in the Power Supply socket, as well as the spare fuse.
MEMORY.- Non volatile static RAM type, to maintain the real time clock running in power down or
in case of power failure during two years. It allows 100,000 cycles ON/OFF.
On the run time clock the data and alarm value will be stored also for a maximum of
2 years.
RESET.- By remote push-button using the connector of 15 terminals on the rear part.
Only for run time clock.
4.- MODELS
4.1.- MODEL LDP-1XX-C0. Display time using the format MM: SS
Real time clock : 59 minutes, 59 seconds.
Run time clock : 99 minutes 59 seconds.
Real time clock or run time clock is internally DIP switch selectable.
Run up or run down controlled by internal dip switch.
4.2.- MODEL LDP-1XX-C1. Display time using the format HH : MM
Real time clock : 12 or 24 hours selectable.
Run time clock : 99 hours 59 minutes.
Real time clock or run time clock is internally DIP switch selectable.
Run up or run down controlled by internal dip switch.
4.3.- MODEL LDP-1XX-C2. Display time using the format HH : MM : SS
Real time clock : 12 or 24 hours.
Run time clock : 99 hours, 59 minutes, 59 seconds.
Real time clock or run time clock is internally DIP switch selectable.
Run up or run down controlled by internal dip switch.

Page : 6
OUTPUTS
SERIALOUTPUT . . . . . . . Outputintendedfortransmissiontothe
remotedisplayfittedwithaclock
displayasaslaveclockdisplay.
Signal . . . . . . . . . . . . . . . . RS422level1200baudfixedrate.One
transmissioneachsecondwhile
showingrealtimeorruntime.
String. . . . . . . . . . . . . . . . . Transmits--NUL--(CR)
or--NUL--NUL--(CR)whensettingtime
orenteringalarmstate.
Datastring
Standard mode . . . . . HH.MM.SSfor6decadeversion.
HH.MMor MM.SSfor4decadeversion.
Newport mode . . . . . . HHM.MS.Sfor6decadeversion.
HHM.Mor MMS.Sfor4decadeversion.
Characterlength . . . . . . . . One startbit,8data bitsnoparityand
onestopbit.
Handshake . . . . . . . . . . . . No handshake:onedatastring
transmittedeachsecond.
EXCITATIONVOLTAGEOUTPUT
Vexc . . . . . . . . . . . . . . . . . +15Vdc±20%.@100 mA. max.
Ripple . . . . . . . . . . . . . . . . 100mVac50/60Hz.
ENVIRONMENTAL
Temperature
Operating . . . . 0 to +50 ºC (32 to 122 ºF).
Storage . . . . . . -20 to +85 º C (-4 to 185 ºF).
Relativehumidity . . . . . . . . 0to85 %notcondensed.
Protection . . . . . . . . . . . . . IP65.(Frontpartonly).
MECHANICAL
Dimensions . . . . . . . . . . . . Seetableinpage13.
Panelcutout . . . . . . . . . . . Seetableinpage13.
Depth. . . . . . . . . . . . . . . . . Seetableinpage13.
Weight. . . . . . . . . . . . . . . . Seetableinpage13.
Casematerial. . . . . . . . . . . Aluminiumextruded.
Finished. . . . . . . . . . . . . . . Anodized,blackcolour.
ELECTRICAL
Standardpowersupply . . . 115 Vac. ±10% 50 / 60 Hz.
(230Vacoptionally)
Consumption . . . . . . . . . . . Seetableinpage13.
5.- GENERAL SPECIFICATIONS
DISPLAY
Type . . . . . . . . . . . . . . . . . 4 or 6 digits, 7segments,redorgreenLED.
Heightdigit . . . . . . . . . . . . 57 (2.3") or 100 mm.(4")
Rangemáx.. . . . . . . . . . . . 99 : 59 or 99 :59 : 59
Brightness . . . . . . . . . . . . . Set by switch for 25%, 50%, 75%
or100%(normal).
REAL TIME CLOCK.
Type . . . . . . . . . . . . . . . . . 59 mm 59 ss (model C0)
12/24hoursselectable
Timesetting . . . . . . . . . . . . Byvoltfreecontactclosureinputs
secondsreset,minutesadvance
andhoursadvance.
Timeaccuracy . . . . . . . . . . ±1minutepermonth.
Powerdown . . . . . . . . . . . . Maintainstimeforminimum2years
withoutmainspower.
RUN TIME CLOCK
Type . . . . . . . . . . . . . . . . . 99 mm 59 ss, 99 hh 59 mm
or 99 hh 59 mm 59 ss
Timerresolution . . . . . . . . . 1second.
Timeruncertainty . . . . . . . . 1secondmax.perstart/stopsequence.
Timermemory . . . . . . . . . . Runtimemaintainedfor2yearsminimum
butnotupdatedwithmainsremoved.
Alarm . . . . . . . . . . . . . . . . . Oneminuteoronesecondresolution
(oneminuteonlyonmodelC2)setby
externalclosureinputs.
Alarmenable . . . . . . . . . . . Controlledbyinternalswitch.
Alarmoutput . . . . . . . . . . . Opticallyisolatestransistorswitch
30 V / 30 mA capacity.
Alarmindication . . . . . . . . . Clockstop,displayflashesandalarm
outputactivates.
Initialization . . . . . . . . . . . . Byoperationofoneormorethe
controlinputs.
CONTROL LINES
Type . . . . . . . . . . . . . . . . . Threeinputssharingonecommonreturn.
Threshold . . . . . . . . . . . . . Rising : +2.3 V min., +3.6 V max.
Falling:+0.9Vmin.,+2.5 V max.
Signalhysteresis . . . . . . . . 0.4Vminimum.
Maximumsignal . . . . . . . . . ±30 V.
Loading . . . . . . . . . . . . . . . 100 KΩtocommonfor+5Vsignal
18KΩloadingbeyond+5/-0.6V.
Load . . . . . . . . . . . . . . . . . 1 KΩ±5%loadmaybeinternally
jumperedtocommonortotheexcitation
supplyforeachcontrolline.
Responsetime. . . . . . . . . . 200mSmaximum:internally
debouncedforcontactclosureinputs.
Activelevel. . . . . . . . . . . . . Internallyjumperedtobeactiveeitherwith
lowlevel/fallingedgeorhighlevel/rising
edgeinputsindependentlyforeach
controlline.
CONTROL MODES
Type . . . . . . . . . . . . . . . . . Theoperatingmodedependson
interlinkingofthethreecontrollines.
Onecontrol . . . . . . . . . . . . Toresetandrunwhenactiveandstop
wheninactive.
Twocontrols . . . . . . . . . . . Onetorunwhenactiveandstopwhen
inactiveandtheothertoreset.
Twocontrols . . . . . . . . . . . Onetoalternatelystartandstopandthe
othertoreset.
Threecontrols . . . . . . . . . . Onetostart,onetostopandoneto
reset.

Page : 7
6.- FRONT VIEW, DESCRIPTION
Models LDP-126-C2
LDP-146-C2
Models LDP-124-C0 & C1
LDP-144-C0 & C1
Display seconds for model C0
Display minutes for model C1
colon
Display minutes for model C0
Display hours for model C1
Display hours for model C2 Display minutes for model C2
7.- REAR VIEW, DESCRIPTION for all series
Display seconds for model C2
Power Supply
Vac + Earth,
fuse and spare fuse.
Attaching screws
Connector Sub-D 15
pins for Control Lines
and voltage excitation
output
Connector Sub-D 9
pins, for serial data
RS422 output
4 ways plug-in screw
connector for alarm
output

Page : 8
8.- WIRING
8.1.- POWER SUPPLY, RECOMMENDED WIRING
POWER SUPPLY
115 Vac (230 Vac Optional).
FUSE and spare fuse.
Main switch
8.2.- PROTECTION FUSES
8.3.- CONTROL LINES, ALARM AND SERIAL OUTPUT
1
8
9
15
Power Fuse
Supply value
230 Vac 0.2 A
115 Vac 0.4 A
TABLE 4
1
9
6
5
A : +Alarm
B : Noconnection
C : Noconnection
D : -Alarm
A
B
C
D
Serial RS422 connector
Control lines connector Alarm connector
The unit has a protection fuse located on the power supply socket.
If this fuse must be replaced or changed because the power supply
is changed, use the time-lag fuse according to IEC 127/2 with the
values indicated on the table.
1.- Vexc.
2.- Vexc.
3.- Start
4.- GND
5.- GND
6.- Minutes
7.- GND
8.- Noconnection
9.- Vexc.
10.- Stop
11.- Reset
12.- GND
13.- Seconds
14.- Hours
15.- GND
1.- SerialA.
2.- SerialB.
3.- Noconnection
4.- Noconnection
5.- GND
6.- Noconnection
7.- Noconnection
8.- Noconnection
9.- Noconnection.
8.4.- NOTES
The HOURS, MINUTES & SECONDS inputs are for contact closure to GND, and are pulled up to the auxiliary 15
volt rail through 4.7 KΩ.
The STOP, START and RESET inputs are normally configured to be pulled up to the auxiliary 15 volt rail through
1 KΩ, butmaybe internally jumpered to bepulled to GND through 1 KΩ, or pulled toGND through a high resistance
of 100 kΩ.
Debouncing for 200 mS time constant is normally incorporated on the three control inputs, but may be disabled by
removing internal jumpers.
Vexc is the Excitation Voltage for sensors supplied by the instrument (pins 1, 2 & 9).
The connections to Serial A, Serial B and GND are for the RS422 data output.
Run time uncertainty
The control inputs are sensed eight times per second, but the actual run time clock is incremented or decremented
in synchronism with the built in real time clock once per second.
This means that each start/stop condition may be inaccurate by up to one second.

Page : 9
8.5.- EXCITATION VOLTAGE FOR SENSORS
The unit supplies the Excitation Voltage for sensors, through control lines connector.
Ifthecurrentrequiredforthesensors installedismorethan100mAthendonotusethisterminal.Installotherexternal
power supply. See paragraph 5 for technical specifications
9.- POWER-UP AND OPERATION
9.1.- REAL TIME CLOCK
At power-up, the unit displays the message MAStEr for 6 decade version or MASt for 4 decade version and will
start to operate.
If a failure occurs then will display the messages CHIP or SET.
The message CHIP means that the failure is the internal
hardware and the message SET means that the data stored in
the memory is damaged and it must be restored.
The restore data operation can be made while the instrument
isinnormaloperation or while the error message SET is on the
display using the control lines HOURS, MINUTES & SEC-
ONDS.
Reaction to the control lines is once per second.
To obtain a complete reset in a real time clock configuration, connect terminals 14 & 13 to GND simultaneously.
The display can be switched in to Run Time Clock mode by inputting an active signal on to any of the three control
lines START, STOP or RESET.
9.2.- RUN TIME CLOCK
At power-up, the unit displays the message MAStEr for 6 decade version or MASt for 4 decade version and will
start to operate.
If a failure occurs then will display the messages CHIP
orSET.ThemessageCHIPmeansthatthefailureisthe
internalhardwareandthemessageSETmeansthatthe
alarm value stored in the memory is damaged and it
must be restored.
UsethecontrollinesRESET,START&STOPtocontrol
the timer. Once the unit is displaying the run time clock
the three control lines operate as show in the table.
An active signal can be either active high or active low
depending upon the internal configuration of the unit as shown in paragraph 10.2.4.
The factory default settings are for contact closures to GND for all three inputs. Reaction to the control lines is once
per second.
Noteonthe4decadeclocktheruntimeclockmaybeeitherforhoursandminutesorforminutesandseconds.During
run time hours and minutes, the colon will flash on and off every second while the clock is running to indicate the
clock is running.
Terminal Function
14 Hours Increment hours
6 Minutes Increment minutes
13 Seconds Reset seconds
An active signal
applied to pin :
11 Reset Resets/Preset the timer
3 Start Starts the timer
10 Stop Stops the timer running
Starts the timer if not running
Function
9.2.1.- UP / DOWN TIMING
The run time clock has two basic modes of operation; a run up clock or a run down clock. These modes are
controlled by a internal DIP switch (See DIP SWITCH CONFIGURATION in paragraph 10.2.3).
Run up clock
Reset will clear the clock to zero. When the alarm point is reached, if the alarm is enabled, the clock will stop
and the whole display will flash and the alarm output will be activated, until the clock is reset. If the alarm is
disabled, the clock will run up to 99 minutes 59 seconds (or 99 hours 59 minutes) and then roll over zero.
Run down clock
Reset will preset the clock to the alarm point. When zero is reached, if the alarm is enabled, the clock will stop
and the whole display will flash and the alarm output will be activated, until the clock is reset. If the alarm is
disabled, the clock will run down to zero and then underflow to 99 : 59.

Page : 10
9.2.2.- CONNECTION EXAMPLES
Different interlinking of the three control lines will produce different operating modes:
Close contact A = reset and run
Open contact A = stop
Stop
Start
Reset
GND
Stop
Start
Reset
GND
Stop
Start
Reset
GND
With contact B opened
close contact A = run
open contact A = stop
push contact B = reset
A
A
A
B
BPush A = start
Push A = stop
Push B = reset
Stop
Start
Reset
GND
A
B
C
Stop
Start
Reset
GND
ABPush A = reset and start
Push B = stop
(push B again = start)
Push B = start
Push A = stop
Push C = reset
note A may close while B
is shut
B may open while A is shut
9.3.- RUN TIME ALARM SETTING
The alarm is a 4 decade alarm only. On the 6 decade clock, the alarm setting is for hours and minutes only and
on the 4 decade clock the alarm point can be for either hours and minutes or minutes and seconds.
Displaying or setting of the alarm point can only be done when the unit is displaying the run time and is not
running.
The same three contact inputs are used for setting the alarm point and for adjusting the real time clock, but their
functions are different.
To display the alarm set point, hold the SECONDS input (pin 13) to GND. Once the alarm point is displayed, the
value can be changed by contact closure between GND and the following terminals :
Seconds........................... view/adjust alarm point ( hold to GND).
Minutes ............................ increment seconds ( or minutes).
Hours ............................... increment minutes ( or hours).
Hours and Minutes .......... together reset alarm to zero
9.4.- SERIAL DATA OUTPUT
The unit incorporates and RS422 level serial ASCII output to allow master/slave clock setups in conjunction with
serial ASCII remote displays.
Details of the serial output to be found in paragraph 5.
Note the line should be terminated to prevent noise pickup if the clock is not transmitting data.
10.- CONFIGURATION
10.1.- POWER SELECTION
See the rear label for power requirements. Power supply selection must be done by suitable qualified
personnel or by the local distributor. Contact factory or your local distributor for instructions.
10.2.- INSTRUMENT CONFIGURATION
To change the instrument configuration, the rear panel of the instrument needs only to be removed to gain
access to the internal DIP switches and jumpers located on the control board.
Be sure that the instrument is disconnected from any power supply before removing the rear panel.

Page : 11

























Control board position for instruments
series LDP-2X-CX Control board position for instruments series LDP-4X-CX
10.2.1- CONTROL BOARD POSITION
10.2.2- DIP SWITCH AND JUMPERS LOCATION
JP5
JP9
















JP10
JP1 JP2 JP3 JP4 ON
OFF
JP7
JP6
JP8
A
B
10.2.3- DIP SWITCH CONFIGURATION
Switch Switch position
number OFF ON
1 Alarm Disable Enable*
2 Run time Up* Down
3 Display brightness See brightness table
4 Display brightness See brightness table
5 Clock range MM :SS HH :MM
6 Clock range 12 hours 24 hours*
7 Serial data output See serial data output
configuration
8 Function selection Real time* Run time
Display brightness table
DIPswitch brightness
34 %
OFF OFF 25
OFF ON 50
ON OFF 75
ON ON 100*
* = Factory set-up
1 2 3 4 5 6 7 8 910 11 12
ON
OFF
Function

Page : 12
10.2.4- JUMPERS CONFIGURATION
Function Close Jumper
220 Ω terminator resistor for the RS422 JP1 (By default opened)
switch debounce of 5 Hz for the STOP line JP2* (By default closed)
switch debounce of 5 Hz for the START line JP3* (By default closed)
switch debounce of 5 Hz for the RESET line JP4* (By default closed)
10.2.5- SERIAL DATA OUTPUT CONFIGURATION
* = Factory set-up
* = Data output format only when the colon is lighted.
** = Data output format only when the colon is NOT lighted.
H = Character from "0" to "9" which represent one number of hours.
M = Character from "0" to "9" which represent one number of minutes.
S = Character from "0" to "9" which represent one number of seconds.
Character "." = 02E hex.
Character "-" = 02D hex.
Character "(NUL)" = 0 hex.
Character "(CR)" = 0D hex.
Jumper Application A Jumper position B
JP5 for STOP line 1 KΩpull-up * 1 KΩpull-down
JP6 for START line falling edge/low level active* rising edge/high level active
JP7 for STOP line falling edge/low level active* rising edge/high level active
JP8 for RESET line falling edge/low level active* rising edge/high level active
JP9 for START line 1 KΩpull-up* 1 KΩpull-down
JP10 for RESET line 1 KΩpull-up* 1 KΩ pull-down
Data output format
with DIP switch 7 with DIP switch 7
in position ON in position OFF
(NEWPORT mode) Standard mode
C2 HHM.MS.S(CR) HH.MM.SS(CR) --(NUL)--(NUL)--(CR)
C1 HHM.M(CR) HH.MM(CR) * --(NUL)--(CR)
HH(NUL)MM(CR)**
C0 MMS.S(CR) MM.SS(CR) --(NUL)--(CR)
Instrument
reference
Transmission during
time adjust or in
alarm status

Page : 13
11.- INSTALLATION
1.- Prepare a panel cut-out with the dimensions indicated on paragraph 12.
2.- Slide the instrument (1) into the cut-out.
3.- Slide the two fixation pieces (3) with T shape by both lateral sides of the instrument, such as it
is shown on the drawing below.
4.- Turn the screw bolt until it is pressed firmly against the panel (4) and the instrument (1) remains
totally fixed.
5.- The front part of the instrument has the necessary elements to provide an IP 65 protection. If the
panel where this instrument must be installed, it must to comply some protection standards
against water splashes, then a rubber profile must be installed with a rectangular or round shape
(5) on the place indicated and shown on the drawing below.
4
532
1






























1234567890123456789012345678
1
23456789012345678901234567
8
1
23456789012345678901234567
8
1
23456789012345678901234567
8
1
23456789012345678901234567
8
1
23456789012345678901234567
8
1
23456789012345678901234567
8
1
23456789012345678901234567
8
1
23456789012345678901234567
8
1
23456789012345678901234567
8
1
23456789012345678901234567
8
1
23456789012345678901234567
8
1
23456789012345678901234567
8
1
23456789012345678901234567
8
1234567890123456789012345678
Dimensions in mm. Parenthesis are in inches or pounds.
Add 27 mm to the dimension C for power connector.
D
E
A
B
C
12.- MECHANICAL DIMENSIONS mm (inches)
PANEL CUT-OUT
Panel thickness : Max. 14 (0.55)
Min. 2.5 (0.10)
Anti-Glareredlens
Aluminiumbackplate
Table 5
DIMENSIONS PANEL CUT-OUT WEIGHT POWER
Digits Height A B C D E
4 57 (2.3) 264(10.4) 120(4.75) 112 (4.41) 256(10.07) 112 (4.4) 2.3 Kg (5 lbs) 6 VA
4 100 (4) 480(18.9) 180(7.09) 112 (4.41) 472(18.58) 172(6.77) 5 Kg (11 lbs) 12 VA
6 57 (2.3) 384 (15.12) 120(4.75) 112 (4.41) 376(14.8) 112 (4.4) 2.7 Kg (6 lbs) 6 VA
6 100 (4) 688(27.1) 180(7.09) 112(4.41) 680(26.77) 172(6.77) 5.7 Kg (12.5 lbs) 12 VA

JP1
JPA2
TSM48T02-200PC1
1137A
TIMEKEEPERTM RAM
LIT HIUM BATTERY
MALA YSIA
JPA3
JPA4
REMOVE IC4
SITUATION JUMPER JPA2
JP1
Configuration Diagram.
Charge
connected
Charge
disconnected
C.I.98/04
C.I.98/06
APPENDIX 1: MODEL LDP-1XX-CX AS SLAVE REPEATER.
FUNCTIONAL DESCRIPTION:
Special configuration of Models LDP-1XX-CX for serial RS-422 repeater, to be used as slaves.
The Serial port connection which is the only that keeps in operation, it is used to enter the data coming
from the Master.
The rest of functions and connections of these Models, remain disabled.
CONFIGURATION OF A SLAVE MODEL, STARTING FROM A MASTER MODEL LDP-1XX-CX:
- Remove the integrated circuit "IC4" placed on the PCB "98/04" and close jumper JPA2.
CONFIGURATION OPTIONS:
Jumper JP1 placed on PCB "98/06", connects the RS-422 line termination (220 Ohm.).
The rest of the Mini-dips and Jumpers are disabled on this Mode.
OPERATION:
After powered up the unit, the 4 digit Models will display "SLU" and the 6 digit Models will display "SLAUE".
These above indications will remain on the Display, until to receive valid data through RS-422 channel.
Page : 14

Page : 15
master
slave 124-C0
124-C1 126-C2 144-C0 144-C1 146-C2
LDP-124-C YES NO YES NO
LDP-126-C NO YES NO YES
LDP-144-C YES NO YES NO
LDP-146-C NO YES NO YES
COMPATIBILITY TABLE AMONG MASTER-SLAVE
APPENDIX 2: TIME-NET CONFIGURATION AND CONNECTIONS.
It is advisable to make the TIME-NET connections as follows:
MASTER
SLAVE
SLAVE SLAVE SLAVE
SLAVE
Don’t connect RS-422 (JP1) line termination.
1432
Transmitter
Unit
Receiver
Units Connect RS-422 (JP1)
line termination.
Note
Shielded twisted-pair cable, must be used for connections.
n (maximum 32 units)
MASTER SLAVE
9
1
5
6
9
5
6
shield
shield
To other slaves
To other slaves
Don’t connect the cable shield
to the receiver units (slaves).
1

WARRANTY/DISCLAIMER
OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a
period of 13 months from date of purchase. OMEGA warranty adds an additional one (1) month grace
period to the normal one (1) year product warranty to cover handling and shipping time. This ensures
that OMEGA’s customers receive maximum coverage on each product.
If the unit malfunction, it must be returned to the factory for evaluation. OMEGA’s Customer Service
Department will issue an Authorized Return (AR) number immediately upon phone or written request.
Upon examination by OMEGA, if the unit is found to be defective it will be repaired or replaced at no
charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser,
including but not limited to mishandling, improper interfacing, operation outside of design limits, improper
repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of having been
tampered with or shows evidence of having been damaged as a result of excessive corrosion; or current,
heat, moisture or vibration; improper specification; misapplication; misuse or other operating conditions
outside of OMEGA’s control. Components which wear are not warranted, including but not limited to
contact points, fuses and triacs.
OMEGA is pleased to offer suggestions on the use of its various products. However OMEGA
neither assumes responsibility for any omissions or errors nor assumes liability for any damages
that result from the use of its products in accordance with information provided by OMEGA, either
verbal or written. OMEGA warrants only that the parts manufactured by it will be as specified and
free of defects. OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND
WHATSOEVER, EXPRESS OR IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED WARRANTIES
INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PUR-
POSE ARE HEREBY DISCLAIMED.
LIMITATION OF LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total
liability of OMEGA with respect to this order, whether based on contract, warranty, negligence,
indemnification, strict liability or otherwise, shall not exceed the purchase price of the component
upon which liability is based. In no event shall OMEGA be liable for consequential, incidental or
special damages.
CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic
Component”under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical
applications or used on humans. Should any Product(s) be used in or with any nuclear installation or
activity, medical application, used on humans, or misused in any way. OMEGA assumes no responsibility
as set forth in our basic WARRANTY/DISCLAIMER language, and, additionally, purchaser will indemnify
OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the
Product(s) in such a manner.
RETURN REQUESTS/INQUIRIES
Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE
RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN
(AR) NUMBER FROM OMEGAS’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID
PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the package
and on any correspondence.
The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent
breakage in transit.
FOR WARRANTY RETURNS, please have the following FOR NON-WARRANTY REPAIRS, consult OMEGA for
informationavailableBEFORE contactingOMEGA: currentrepaircharges.Havethefollowinginformation
1. Purchase Order number under which the product was availableBEFORE contactingOMEGA:
PURCHASED, 1. Purchase Order number to cover the COST of the
repair,
2. Model and serial number of the product under warranty, 2. Model and serial number of the product, and
and 3.Repair instructionsand/orspecificproblems relative
3. Repairinstructionsand/orspecificproblems relativeto to the product.
theproduct.
OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible.
This affords our customers the latest in technology and engineering.
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 1998 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied, reproduced,
translated,orreducedtoanyelectronicmedium ormachine-readableform,inwholeorin part,withoutpriorwrittenconsentofOMEGA
ENGINEERING, INC.
Page : 16

Where Do I Find Everything I Need for
Process Measurement and Control?
OMEGA...Of Course!
TEMPERATURE
;Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies
;Wire: Thermocouple, RTD & Thermistor
;Calibrators & Ice Point References
;Recorders, Controllers & Process Monitors
;Infrared Pyrometers
PRESSURE, STRAIN AND FORCE
;Transducers & Strain Gauges
;Load Cells & Pressure Gauges
;Displacement Transducers
;Instrumentation & Accessories
FLOW/LEVEL
;Rotameters, Gas Mass Flowmeters & Flow Computers
;Air Velocity Indicators
;Turbine/Paddlewheel Systems
;Totalizers & Batch Controllers
pH/CONDUCTIVITY
;pH Electrodes, Testers & Accessories
;Benchtop/Laboratory Meters
;Controllers, Calibrators, Simulators & Pumps
;Industrial pH & Conductivity Equipment
DATA ACQUISITION
;Data Acquisition & Engineering Software
;Communications-Based Acquisition Systems
;Plug-in Cards for Apple, IBM & Compatibles
;Datalogging Systems
;Recorders, Printers & Plotters
HEATERS
;Heating Cable
;Cartridge & Strip Heaters
;Immersion & Band Heaters
;Flexible Heaters
;Laboratory Heaters
ENVIRONMENTAL
MONITORING AND CONTROL
;Metering & Control Instrumentation
;Refractometers
;Pumps & Tubing
;Air, Soil & Water Monitors
;Industrial Water & Wastewater Treatment
;pH, Conductivity & Dissolved Oxygen Instruments
M3229 / 0699
Page : 17