Series 321
Contents
1. 36 months after delivery to the first purchaser for use providing that the unit has not been misapplied Because Watlow has no control over its use or misuse we cannot guarantee against failure Watlow s obliga tions hereunder at Watlow s option are limited to replacement or refund of the purchase price of a unit that upon examination proves to be defective within the warranty period This warranty does not apply to damage resulting from transportation alteration misuse or abuse WATLOW Series 321 User s Manual 62. Series 321 Dual Output Digital Countdown Timer I User S Manual Watlow s Series 321 is a dual output digital countdown timer with an easy to use control and display panel The display allows you to track remaining time and process status On board memory retains the most recent time setting for easy recall even after power is removed The interlock feature interrupts timer operation immediately when it is opened This feature can be used as an interlock remote off or emergency shut off Si The housing and connectors are designed for A Y oP fast and reliable installation in your product TOTAL Features CUSTOMER e Square 1 8 DIN size SATISFACTION e Universal mounting scheme through the A aki panel or flush mount e Standard 1 4 spade wiring terminals ISO 9001 e Dual output 6A 120V ac or 3A WAT LOW Middl SN 240V ac mechanical relays U e Corrosion and water resistant composite case Co ntrols _ e Timer display options include hours minutes 1241 Bundy Blvd P O Box 5580 Winona MN 55987 5580 or minutes seconds Phone 507 454 5300 Fax 507 452 4507 Figure 1a Series 321 Timer and mounting collar side view Figure 1b Series 321 Timer inserted in the mounting collar side view 150 19 1mm _ 1 750 lt 44 5mm 1 750 Front Panel Front Panel a a g 2 585 3 325 2 585 2 85 Tabs Tabs a Ridges Ridges 321 Timer Mounting Collar Timer
3. ecognized when a countdown se NOTE Actuation of the Increase or Decrease keys AN quence is in progress ES Start Stop Egy This key is used to start and stop the countdown sequence enter a countdown time into memory recall a countdown time from memory and deactivate Relay 1 or Relay 2 e Pressing this key when a countdown sequence is in progress will cause the timer countdown to stop and Relay 1 to de energize The unit will then go into the Hold Ready condition e Pressing this key when a countdown time greater than O is selected and the timer is in a Hold Ready condition will cause Relay 1 to energize and the timer to begin counting down in one second intervals e Pressing this key while Relay 2 is energized after completing a countdown sequence will cause Relay 2 to de energize prior to the 30 second time out Relay 2 will remain de energized until next countdown sequence is completed Memory Operation Memory Feature The memory feature is always active Storing Every time the countdown sequence is initiated the beginning countdown time as shown in the display will be stored in memory This will replace any previously stored countdown time Recalling The time stored in the memory is recalled by pressing the Start Stop key while a countdown sequence is not in process and the display is at OOO The time recalled from the memory will be shown on the display Modifying Once the recalled time is sho
4. flush with Mounting Collar W321 XUMN Rev B Made in the U S A May 1997 1107 Printed on Recycled Paper 10 Postconsumer Waste Figure 2a Series 321 Timer inserted Figure 2b Series 321 Timer inserted in the mounting collar bottom view in the mounting collar top view 321 Timer Front Panel 3 325 e 2 585 65 7mm 85 46mm gt Mounting CMAs l I E n O 1 750 44 5mm 1 750 44 5mm Mounting ToS l Collar S 3 325 85 46mm _ 2 585 65 7mm 321 Timer Front Panel Installation Through the Panel Installation Procedure 4 While pressing the front of the timer against the 1 Make a panel cutout using the dimensions in panel slide the mounting collar over the back of Figure 2c it The tabs on the collar must line up with the 2 Remove the timer from its collar and set the ridges on the timer for secure installation see collar aside Figure 1b 3 Insert the timer into the cutout Check to see 5 The tabs on each side of the collar have teeth that the gasket is not twisted and is fully seated that latch into the ridges of the timer Be sure in its channel to apply enough pressure to firmly install the timer Figure 2c Series 321 Through the Panel dimensions Panel 2 585 65 7mm 7 lt 250 6 35mm i mMII 6 i E paN A l 2585 4 z l 2 585 Square Cut 65 7mm in WATLOW Series 321 User
5. ing studs that you previously installed to attach the Timer to the panel 2 Remove the Timer and mounting collar from the panel 3 Then follow the Through the Panel Mount Removal procedure for removing the mounting collar WATLOW Series 321 User s Manual 5 Specifications Ordering Information 1015 Control Mode e Countdown timer hours minutes minutes seconds e Timer output modes Output 1 energized during countdown only Output 2 energized at completion of countdown for a period of 30 seconds Operator Interface e Single four digit seven segment display red e Three tactile feedback momentary contact or push button switches Outputs Dual e 1 Mechanical relay form A 6A 120V ac 3A 240V ac no RC contact suppression e 2 Mechanical relay form A 6A 120V ac 3A 240V ac no RC contact suppression Safety Interlock e Dry contact closure minimum switch open resis tance 1M ohm maximum switch closed resis tance 500 ohms Timer Accuracy e 0 1 of programmed time e Timer resolution 1 second Agency Approvals e UL 917 e C UL Power e 108 to 132V ac 57 to 63 Hz Mechanical e Square 1 8 DIN panel mount or behind the panel flush mount e Width x height x depth 2 677 x 2 677 x 1 50 68mm x 68mm x 37 5mm Operating Environment e O to 60 C 32 to 140 F e 0 to 90 RH non condensing 1016 TXXX Custom Standard o F 3 2 1 Standard XXX Customer Specia
6. isolation Output 1 Wiring Figure 4b Series 321 back view Output 2 Wiring Figure 4c Series 321 back view Interlock Wiring Figure 4d Series 321 back view A NOTE The Interlock must be closed for the timer to initiate a timing sequence A NOTE The switch and wiring practices used for interlock operations must meet U L Stan dards DITI FAVES e Point is flashing Interlock is in an open condition see Figure 4e e Points and are not illuminated Timer is in a Hold Ready condition see Figure 4e e Points and are illuminated Timer is running see Figure 4e e Numeric Display is illuminated The Numeric Display is always active when power is applied to the timer see Figure 4e Figure 4e Series 321 front display WATLOW WATLOW Series 321 User s Manual 4 Power On Apply power to the Series 321 see Figure 4a The numeric display is always active when power is applied to the timer Increase Time vy Pressing this key increases the countdown time If the Increase Time button is pressed when the maximum time 9959 is displayed the unit will wrap to the minimum number 000 and continue increasing Decrease Time vy This key is used to decrease the countdown time If the Decrease Time button is pressed when the minimum time OOO is displayed the unit will wrap to the maximum number 9959 and continue decreasing will not be r
7. l Maximum Countdown Time M 99 Minutes Minutes Seconds Displayed H 8 59 Hours Minutes Displayed 1 Output D Electromechanical Relay NO SPST 6A 120V ac 3A 240V ac 2 Output D Electromechanical Relay NO SPST 6A 120V ac 3A 240V ac Line Voltage 1 120V ac 60 Hz Mounting Style 0 Universal Panel Flush Mount Overlay Software 00 Standard Watlow Identification 01 No Overlay XX Custom Overlays parameters or software Consult Factory Display R Red Display Color Recycling To assure proper disposal Watlow accepts used 321s Phone 507 454 5300 for Return Materials Authorization RMA number Contact your Watlow representative for details 1 Call Customer Service 507 454 5300 or fax 507 452 4507 for a Return Material Authorization RMA number before returning any item for repair 2 Make sure the RMA number is on the outside of the carton and on all paperwork returned Ship on a freight prepaid basis 3 A restocking charge of 20 of the net price applies for all stock controls and accessories returned in like new condition and within 120 days after shipment Non stock and modified stock items are not returnable 4 If the unit is unrepairable it will be returned to you with a letter of explanation Repair costs will not exceed 50 of the original cost The Series 321 is warranted to be free of defects in material and workmanship for
8. s Manual 2 Installation Flush Mount Installation Procedure I 2 3 Make the display and three key panel cutouts 4 Remove the timer from the collar using the dimensions in Figure 3a 5 Remove the gasket and discard then firmly Drill four of the eight labeled holes to allow for a reinsert the timer into the collar The tabs on 6 stud You must use a combination of the the timer must lock into the ridges on the holes labeled 1 3 5 and 7 or the holes labeled collar see Figure 1b 2 4 6 and 8 6 Attach timer collar to the panel by installing Press the mounting studs through the front of and tightening the nuts on the mounting the holes prior to installing your decal overlay studs NOTE Decal overlay is not supplied by Watlow Figure 3a Series 321 Flush Mount dimensions eg 3175 Typ 2 80 6mm 1 50 Typ 2 ie 838 _ 38 0 mm 21 3mm Typ 2 e 750 lt 19 1mm O2 ee aa ek eee ee EEE eee 21 3mm Typ 2 wee O8 _ i 288 7 32mm 3 175 1 50 o Arapa f 80 6mm 38 0mm 1 125 Typ 2 Typ 2 28 58mm 25 F 175 4 44mm O6 O5 Diameter 550 Typ 3 14 0mm 750 19 1mm 7 1 5 _ P 38 0mm WATLOW Series 321 User s Manual 3 Power Wiring Voltage Input 120V ac nominal Figure 4a Series 321 back view A WARNING Possibility of shock There is no
9. wn on the display and the countdown sequence has not begun it can be modified using the Increase or Decrease Time Keys If you modify the recalled time it will replace the stored time when the Start Stop Key is pressed Using When the timer is in the Hold Ready state and the memory time or the modified memory time is displayed pressing the Start Stop key will begin the countdown sequence Troubleshooting e Display is not illuminated Check for proper power wiring see Figure 4a e Upper left decimal point is flashing Interlock condition has opened during a count down sequence see Figure 4e e Timer will not initiate a countdown Interlock has opened e Other Check all wiring connections see Page 2 Contact your Watlow Sales Agent Contact us Phone 507 454 5300 Fax 507 452 4507 For technical support ask for an Applications Engineer To place an order ask for customer service To discuss a custom option ask for a Series 321 Product Manager Removing the Series 321 Through the Panel Mount Removal 1 To remove the Series 321 you must first remove the mounting collar 2 To remove the mounting collar slide a thin tool such as a putty knife between all three mount ing tabs and the ridges on both sides of the Timer at once see Figure 1b 3 While lifting the tabs push on the back of the Timer and slide it out of the mounting collar Flush Mount Removal 1 Remove the four nuts on the mount
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