the user's guide - Lathem Time Corporation

Sonachron ® (DWA-S)User’s Manual

Lathem Time Corporation200 Selig Drive, SWAtlanta, GA 303361-800-241-49901-404-691-0400www.lathem.comDocument No. OMSC-0708Copyright © 2008 Lathem Time Corporation.All rights reserved.

TABLE OF CONTENTSSPECIFICATIONS..................................................... 1INTRODUCTION ....................................................... 2QUICK START STEPS.............................................. 3DIP SWITCH SETTINGS........................................... 8PROGRAMMING A SECURITY CODE..................... 9UNLOCKING THE KEYPAD.................................... 10SETTING TIME AND DATE .................................... 10PROGRAMMING EVENTS (On/Off Controller)....... 11PROGRAMMING EVENTS (Bell Ringer)................. 12PROGRAMMING SIGNAL LENGTH (Bell Ringer) .. 12MANUAL LUNCH AND BREAKS (Bell Ringer) ....... 13SIGNAL ON/OFF..................................................... 14MANUAL OPERATION............................................ 14STANDBY POWER ................................................. 14RS485 SYNCH ........................................................ 15WIRING DIAGRAMS ............................................... 15WARRANTY............................................................ 24

SPECIFICATIONSInput Voltage 115 VAC (220 Optional)Input Frequency 50/60 HzInput Power 20 Watts MaxStandby Power 1.2 Ah, 6 V batteryStandby Time 10 DaysTiming Accuracy Per line frequencyNumber of Events 1440 (any combination of weekdays)Signal Duration Programmable – 1 to 99 secsDaylight Savings Automatic (Disable by dip switch)Time Display 12 or 24 hr selectableComm Port RS485 – ReceiverRelays10 Amp Dry ContactTemperature Range 0 C to 60 CVoltage Range +/ - 10 % of input voltageShipping Weight 7 lbDimensions 9 ¾”x 3 ¼”x 5 3/8”WARNING: This equipment generates uses and can radiateradio frequency energy and, if not installed and used inaccordance with the instruction manual, may cause interferenceto radio communications. It has been tested and found tocomply with the limits for a Class A computing device pursuant toSubpart J of Part 15 of FCC Rules, which are designed toprovide reasonable protection against such interference whenoperated in a commercial environment. Operation of thisequipment in a residential area is likely to cause interference, inwhich case, the user, at his own expense, will be required to takewhatever measures may be required to correct the interference.Page 1

INTRODUCTIONThe DWA-S is a single circuit signaling device which can beused as a bell ringer or on/off controller. It is capable of retainingup to 1440 separate events for each day of the week in memoryplus a floating lunch and break schedule which can be activatedwith a single key on the keypad or a remote switch. Automaticadjustment for daylight savings time change is also provided. Aliquid crystal display on the front of the unit displays the currenttime (in 12 or 24 hour format), date, and day of the week, bell oron/off control status, programming prompts, and indication ofoperation on standby power. A 24-button keypad is used forsetting time, programming events, manual operation of bells orcontrols, initiating lunch or break bells, and on/off control of theschedule. Access to programming functions and manual keys(MANUAL, START LUNCH, and START BREAK) is controlled bya user defined security code.The time keeping ability of the DWA-S is dependent on thepower source frequency. A switch setting selects operationbased on 50 or 60 Hz. During A.C. power failures, the unitswitches to a quartz crystal time base and a 6 volt battery allowsthe unit to continue to keep time and retain all data for 10 days.Upon power resumption, the battery automatically recharges withcurrent limited to 1.5 Amperes.Page 2

QUICK START STEPSStep 1 – Mount Unit to Wall1. Unscrew 2 left screws to remove left side panel.2. Slide front panel left.3. Disconnect cable connector from right side of front panel.4. Slide front panel left and remove completely.5. Find a suitable location on the wall that allows at least 10inches of clearance on the left side to allow the front panel toslide on and off.6. Mark 3 hole positions on wall for mounting the unit.Mark Holes7. Remove plastic bushing from back of unit before mountingon the wall.8. Drill marked holes and install wall anchors in wall ifnecessary (not provided).Page 3

9. Secure unit to wall using screws (not provided).Drill HolesWallAnchorStep 2 – Swith Off Power to AC Circuit1. SWITCH OFF THE CIRCUIT THAT WILL FEED AC POWERTO THE UNIT BEFORE PROCEDING.Step 3 – Connect Wires for 115VAC or 24VAC BellsIMPORTANT! This unit is shipped from the factory as a BellRinger. To change to an ON/OFF controller, see DIP SwitchSetting on page 8. This section provides instructions forwiring 115VAC or 24VAC bells, see Wiring Diagrams onpages 20 – 22 for other options.1. There are three options for routing wires into the DWA-S:top, back or bottom. Select on of these and remove the plug.2. Remove cover from terminal strip.Page 4

IMPORTANT: DO NOT PROCEED IF WIRE COLORS AREDIFFERENT THAN SHOWN OR IF YOU ARE UNSUREWHICH WIRES ARE AC HOT, AC NEUTRAL ANDGROUND. THERE IS RISK OF PERSONAL INJURY ANDDAMAGE TO THE UNIT THAT’S NOT COVERED BYWARRANTY. INEXPENSIVE TESTERS ARE AVAILABLEAT YOUR LOCAL HOME ELECTRICAL SUPPLY STOREFOR VERIFYING WIRES.3. Connect wires from power cord as follows: green (ground)wire to “GND”, white (AC neutral) wire to Line Neutral, andblack (AC Hot) wire to Line Hot.4. For 115VAC bells or horns, connect a jumper wire betweenLine Hot and CKT 1A. Connect the bell wires to AC Neutraland CKT 1B.5. For 24VAC bells or horns, connect a jumper wire betweenAC Hot and CKT 1A. Connect the transformer115VAC/primary wires to AC Neutral and CKT 1B. Connectthe transformer 24VAC/secondary wires to the 24 V bells orhorns.NOTE: See pages 20 - 22 for other wiring options that usethe COM, BREAK and LUNCH terminals.Step 4 – Turn on Power Switch1. Press cover onto Terminal Block.2. Set Power switch to up position.Replace CoverPower SwitchPage 5

Step 5 – Secure Cover1. Align front panel in track and slide half way to right.2. Secure ribbon cable on right edge of front panel.3. Slide front panel all the way closed making sure that thecable lays down.4. Attach red battery wire onto battery post.5. Secure left side panel with the screws.CPU BoardReconnect CableRed BatteryWireStep 8 – Restore Power to AC Circuit1. MAKE SURE THE SIDE COVERS ARE SECURE THENSWITCH ON THE AC POWER TO THE CIRCUITFEEDING POWER TO THE UNIT.Page 6

Step 9 – Test Signaling1. Your display should appear as shown in the picture below. Ifnot, please contact your dealer or Lathem Time directly.SECURITY CODE2. Enter a security code using the day of week keys (rememberthe days that you selected).3. Press Run to return to the normal display showing currenttime of day.4. Press the Manual Bells button and confirm that the bells orhorns are sounding properly. If not, please contact yourdealer or Lathem Time directly.5. Set the time and date, and program the unit as described inthe following pages.Page 7

DIP SWITCH SETTINGSTo access the dip switches, removethe two screws holding the left sidepanel in place and remove thepanel. Dip Switches 1, 2, and 3 aremonitored at all times and changestake effect immediately. Dip Switch4 is read only at power up. Tochange the setting for this switch,the unit must be powered completelyoff and back on. Dip Switch 2 isalso used to reset the security code.Any change in its setting will allowyou to view and change the securitycode. The unit is shipped from the factory with all dip switches inthe ON position. The chart below shows the dip switch settings:DipSwitchDescription ON OFF1 Time KeepingFrequency2 Time Format(Security Code Access)60 Hz 50 Hz12 Hr 24 Hr3 Daylight Savings TimeChangeEnabledDisabled4 Operation BellRingerOn/OffControllerPage 8

PROGRAMMING A SECURITY CODEUpon power up you are allowed to enter a security code torestrict access to programming functions. When the unitdisplays “SECURITY CODE”, press from one to four Day of theWeek keys. This is your security code. The ERASE EVENT keycan be used to clear the code for re-entry. Press the RUN key toadvance the programming when you are satisfied with thesecurity code. The unit will prompt “UNSECURED MANUALFWD TO CHANGE.” If this selection is chosen, only theprogramming functions will require the security code to beaccessed. MANUAL, START LUNCH, and START BREAK willbe unsecured. Pressing the selection requires the security codeto be entered prior to both accessing the programming functionsand using the MANUAL, START LUNCH, and START BREAKSkeys. The remote START LUNCH and START BREAKswitches do not require the security code to activate Lunch orBreak schedules. After choosing the level of security desired,press the RUN key to advance to the normal display.If unlimited access to all functions is desired (no security), pressthe RUN key without pressing any Day of the Week keys whenthe unit prompts for the security code. The unit will advance tothe normal display and no security code will be required toaccess any function.To change or view the security code, remove the left side panel,toggle Dip Switch 2, and return it to the desired position. Thecurrent security code will be displayed. Replace the side panel.To change the code, press the ERASE EVENT key to clear thecurrent code and program the new code in the same manner asdescribed above. If you do not wish to change the code, pressthe RUN key until the normal display returns.Page 9

UNLOCKING THE KEYPADTo unlock the keypad, press the Day of the Week keys youprogrammed for the security code followed by RUN. Thesecurity keys must be pressed in the exact order as they wereoriginally entered. The display should read “SELECTFUNCTION.” To relock the keypad, simply press RUN. Thekeypad must be unlocked, or no security programmed, to accessprogramming functions. Remote operation of Start Lunch orStart Break switches do not depend on the status of the keypador security code. Pressing the MANUAL, START LUNCH, orSTART BREAK key while in the programming mode (keypadunlocked) will ring the bells and return the unit to the normaldisplay with the keypad secured. The PRGM LUNCH, PRGMBREAK, SIGNAL LENGTH, and PRGM REVIEW keys may bepressed while the keypad is locked to view the current settings oftheir respective functions.SETTING TIME AND DATEFollow procedure above to unlock keypad. The display shouldread “SELECT FUNCTION.” To set the time, simply press theSET TIME key and use the FAST FWD and SLOW FWD keys toadvance to the correct time. The seconds will be set to zerowhen either forward key is pressed. Selecting another functionor pressing RUN will start the seconds indexing. To set themonth, date, or year, press the SET MONTH, SET DAY, or SETYEAR key, respectively. Use the forward keys to advance to theappropriate setting. Continue to next programming procedure orpress RUN to return to the normal display. The day of the weekwill be determined automatically based on the date.Page 10

PROGRAMMING EVENTS(On/Off Controller)NOTE: Dip Switch 4 must be set to OFF (see page 8)With “SELECT FUNCTION” displayed, press the PRGMEVENTS key. The display should read “CONTROL 12:00 AM.”Use the FAST FWD and SLOW FWD keys to advance thedisplayed time to the desired event time. Once the event time isreached, press the day of the week keys (Sun, Mon, Tue, etc.)to indicate on which day(s) the control should operate. Pressinga key once will display the day of the week and pressing it againwill remove it. The control will default to OFF, press the SIGNALON/OFF key to toggle the control between OFF and ON. Onceyou have chosen the day(s) and on/off status for the event, usethe forward keys to advance the time to the next event and enterthe day(s) and On/Off status. Continue in this fashion until allcontrols are programmed. Press RUN to lock the keypad andreturn to the normal display.While in the Program Events function, the PRGM REVIEW andERASE EVENT keys can be used to scan and erase events,respectively. To scan programmed events, simply press thePRGM REVIEW key. The next event in memory will be locatedand displayed. Pressing the key repeatedly will scan through allevents sequentially. To erase an event, locate the event andpress the ERASE EVENT key.PRGM REVIEW may also be used when the keypad is locked.Pressing the key will display the next scheduled event. Pressthe key repeatedly to scan all programmed events. The normaldisplay will return after 5 seconds or when the RUN key ispressed. ALL LUNCH and BREAK keys and remote switchesare inactive when using the unit as an On/Off Controller.Page 11

PROGRAMMING EVENTS(Bell Ringer)NOTE: Dip Switch 4 must be set to ON (see page 8)With “SELECT FUNCTION” displayed, press the PRGMEVENTS key. The display should read “SIGNAL 12:00 AM” “ONDAYS:” Use the FAST FWD and SLOW FWD keys to advancethe displayed time to the desired event time. Once the eventtime is reached, press the day of the week keys (Sun, Mon, Tue,etc.) to indicate on which day(s) the bells should ring. Pressing akey once will display the day of the week and pressing it againwill remove it. Once you have chosen the day(s) for the event,use the forward keys to advance the time to the next event andenter the days. Continue in this fashion until all events areprogrammed . Press RUN to lock the keypad and return to thenormal display.While in the Program Events function, the PRGM REVIEW andERASE EVENT keys can be used to scan and erase events,respectively. To scan programmed events, simply press thePRGM REVIEW key. The next event in memory will be locatedand displayed. Pressing the key repeatedly will scan through allevents sequentially. To erase an event, locate the event andpress the ERASE EVENT key.PRGM REVIEW may also be used when the keypad is locked.Pressing the key will display the next scheduled event. Pressthe key repeatedly to scan all programmed events. The normaldisplay will return after 5 seconds or when the RUN key ispressed.PROGRAMMING SIGNAL LENGTH(Bell Ringer)The signal length defaults to 5 seconds. To change this value,unlock the keypad and press the SIGNAL LENGTH key. Thecurrent signal length will be displayed. Use the FAST FWD andSLOW FWD keys to change the setting. Values from 1 to 99seconds are allowed. Press RUN to return to the normal display.To review the signal length without unlocking the keypad, simplypress the SIGNAL LENGTH key. The normal display will returnafter 5 seconds or when the RUN key is pressed.Page 12

MANUAL LUNCH AND BREAKS(Bell Ringer)This function provides a means of programming set lunch andbreak lengths which can be initiated at various times during theday. It is only available when the unit is used as a Bell Ringerand operating on AC power. Pressing the START LUNCH orSTART BREAK key at the keypad (or a remote momentaryswitch connected to the unit) causes the bells to signal and adisplayed timer to begin counting down the programmed lunch orbreak time. When the timer counts to zero, the bellsautomatically signal again to indicate the end of lunch or break.This feature is especially convenient for facilities which areserviced by a lunch truck. When the truck arrives on site, simplypress the remote lunch switch to begin the lunch break. Thisfunction also allows a warning bell to ring before the final lunchor break bell.To program a lunch, unlock the keypad then press the PRGMLUNCH key. Use the forward keys to program the desired lunchlength, 00 to 99 minutes. Press the PRGM LUNCH key asecond time to display the length of time (0 to 9 minutes) awarning bell will ring before the ending bell rings. The default is0. Use the forward keys to change this value. Press the RUNkey to return to the normal display. Program breaks in the samemethod.Scheduled bells are inhibited during lunch and break periods. Ifthe schedule is turned off or the MANUAL key pressed while alunch or break period is in progress, the remaining lunch orbreak time will be canceled. If the wrong key was pressed,LUNCH instead of BREAK or BREAK instead of LUNCH, simplypress the correct key before the programmed time has expired.The bells will not ring again and the time already elapsed will beapplied towards the programmed time for the break or lunch. Toreview the programmed times without unlocking the keypad,simply press the PRGM LUNCH or PRGM BREAK key. Thenormal display will return after 5 seconds or when the RUN keyis pressed.Page 13

SIGNAL ON/OFFPressing the SIGNAL ON/OFF key when the keypad is unlockedchanges the On/Off status of the programmed schedule. Whenthe status is ON, bells or controls will operate based on theschedule. When the status is OFF, the schedule is ignored andonly the manual key will operate the bells or controls. Thecurrent On/Off status of controls will remain active until MANUALis pressed or the schedule reactivated. Press RUN to return tothe normal display. When the schedule is inactive, SCHEDULEOFF will be shown below the time on the display.MANUAL OPERATIONPressing the MANUAL key when the unit is being used as a BellRinger will cause the bells to signal for the length of time the keyis pressed. This provides a means of operating the bells atunscheduled times. Pressing MANUAL while lunch or break iscounting down will operate the bells and cause the remaininglunch or break time to be canceled.Pressing the MANUAL key when the unit is operating as onOn/Off Controller will toggle the current On/Off status of thecontrols.The MANUAL key will not ring bells if the unit is operating onstandby power.STANDBY POWERDuring AC power failures, the DWA-S switches to a quartzcrystal time base to maintain the time keeping ability of the unit.A 6 volt battery allows the unit to continue operation and retainthe programmed schedule for 10 days. An * on the lower line ofthe display indicates operation on Standby Power.Programming, schedule review, and manual toggling of theOn/Off control status are available when operating on batteryback up. If operating as a Bell Ringer, the MANUAL, STARTLUNCH, and START BREAK keys, and the remote STARTLUNCH and START BREAK switches are inactive during ACpower failures. Schedule operation is also inactive whenoperating as a Bell Ringer.Page 14

RS485The DWA-S comes equipped with an RS485 receiver which canbe used to synchronize the time and date of the unit with otherequipment. The option supplies three leads on the power supplyboard for connecting to the sending device. The interconnectioncable between devices should be a minimum of 3 meters long toprevent interference to radio communications as required byFCC regulations. Cables less then 3 meters in length require aFair-Rite bead (Lathem Part # VII0058) installed around thecable. The figure below indicates the signal names andcorresponding wire colors.SignalReceive ( + )Receive ( - )Signal GroundWire ColorWhiteYellowBlackNOTE: Preferred cable is CAT-3 or CAT-5 twisted-pair, up to4,000 feet in length.WIRING DIAGRAMSFIGURE 1:CONNECTION FOR DWA-S TO LTRX-512RS-485DWA-S DSD+ -RS-485DSD+ -RS-485RS-485RS-485 MASTER RS-485DSDDSDDSD CLOCK DSD+ - + -+ -+ -MODEM1 2 3 4 5 6 7 8 9 10 11 12 13TxD G RxD D D G S D DNN YD + - D N + -CRS-232 RS-485 SYNCPULSE OUTSYNCHOST COMMUNICATIONSLTR8-512 & LTR8-512M OnlyD D+ -SYNCINRS-485DATA SYNC~ ~12V~ACOUT250maPorts are located on theback of the Display UnitNOTE: Since the Sync In port can send as well as receive, 30 extradevices can connect here. If you already have a MasterSource, such as an LTR-0, connect it and its string of clocks tothe Sync In port, for a total of up to 60 devices.Page 15

FIGURE 2:CONNECTION FOR DWA-S TO LTR-0FIGURE 3:CONNECTION FOR DWA-S TO LTR-GPSPage 16

FIGURE 4:CONNECTING RC-MS TO SYNCH DWA-S ORLTR-0NOTE: A 9vDC Power Adapter (not shown) is also required for theRC-MS.FIGURE 5:OMC – DWA-S INTERCONNECTIONPage 17

Sonachron (DWA-S) can be synchronized to Lathem’s LTRx-512master, LTR-0 master, LTR-GPS receiver, RC-MS master orOmni:ChronII time clock reference devices. Distance from thesource can be extended using Lathem’s SWIFT485+ repeater.Omni:ChronII Time Recorder can be equipped with an optionalRS485 transmitter for communication with the DWA-S. Wheninstalled, the DWA-S will synchronize with the time and datefrom the Omni:ChronII each minute.When installing multiple DWA-S units, all units EXCEPT the oneat the end of the RS485 line require jumper E2 be cut. When E2is installed, a 100 ohm terminating resistor is internallyconnected across the RS485 line to reduce the signal reflectionand thereby improve reception. E2, located on the far left side ofthe CPU circuit board, can be accessed by removing the left endcap. Refer to the Figure on Page 8.Page 18

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FIGURE 6:115/220 VAC BELL WIRINGFIGURE 7:LOW VOLTAGE AC BELL WIRINGPage 20

FIGURE 8:LOW VOLTAGE DC BELL WIRINGFIGURE 9:115/220 VAC CONTROL WIRINGPage 21

FIGURE 10:LOW VOLTAGE AC CONTROL WIRINGFIGURE 11:LOW VOLTAGE DC CONTROL WIRINGPage 22

FIGURE 12:DRY CONTACT WIRING FOR PAGINGSYSTEM OR TONE GENERATORPage 23

Limited One-Year Limited WarrantyLathem warrants the hardware products described in this guide against defects inmaterial and workmanship for a period of one year from date of original purchasefrom Lathem or from an authorized Lathem reseller. The conditions of this warrantyand the extent of the responsibility of Lathem Time Corporation (“Lathem”) under thiswarranty are listed below.1. This warranty will become void when service performed by anyone otherthan an approved Lathem warranty service dealer results in damage to theproduct.2. This warranty does not apply to any product which has been subject toabuse, neglect, or accident, or which has had the serial number altered orremoved, or which has been connected, installed, adjusted, or repairedother than in accordance with instructions furnished by Lathem.3. This warranty does not cover dealer labor cost for removing and reinstallingthe machine for repair, or any expendable parts that are readily replaceddue to normal use.4. The sole responsibility of Lathem under this warranty shall be limited torepair of this product, or replacement thereof, at the sole discretion ofLathem.5. If it becomes necessary to send the product or any defective part to Lathemor any authorized service dealer, the product must be shipped in its originalcarton or equivalent, fully insured with shipping charges prepaid. Lathem willnot assume any responsibility for any loss or damage incurred in shipping.6. WARRANTY DISCLAIMER AND LIMITATION OF LIABILITY: Except onlythe limited express warranty set forth above, the products are sold with noexpressed or implied warranties of any kind, and the implied warranties ofmerchantability and fitness for a particular purpose are hereby expresslydisclaimed. No warranties are given with respect to products purchasedother than from Lathem or an authorized Lathem reseller and any suchproducts are purchased "as is, with all faults." In no event will Lathem beliable for any direct, indirect, special, incidental or consequential damagesarising out of or in connection with the delivery, use or inability to use, orperformance of this product. In the event any limited remedy given hereinshall be deemed to have failed of its essential purpose, Lathem's maximumliability shall be to refund the purchase price upon return of the product.7. Proof of date of purchase from Lathem or an authorized Lathem reseller isrequired for warranty service on this product.8. This Warranty grants specific legal rights. Additional legal rights, which mayvary by locale, may also apply.9. Should any difficulties arise with the performance of this product duringwarranty, or with any Lathem authorized service centers, contact LathemTime at the address below.Lathem Time200 Selig Drive, SW, Atlanta, GA 303361-404-691-0405www.lathem.comPage 24

OMSC-0708