TIMERS ISE, Inc. · 10100 Royalton Rd. · Cleveland, OH 44133 USA · Tel: (440) 237-3200 · Fax: (440) 237-1744 · http://InstServ.com DIMENSIONS INCHES MILLIMETERS Ser Series ies 304 305 Motor-Driven Analog Reset Timer PRODUCT HIGHLIGHTS HIGHEST ACCURACY Because of its exclusive infinite engagement clutch, the 305 has a repeat accuracy of 0.2%, highest of any timer in its class. PLUG-IN AND DUST-TIGHT DESIGN By virtue of its true plug-in design, the body of a 305E can be replaced in seconds without disturbing the hous- ing or disconnecting the wiring. Its gasketed dial assem- bly forms a dust-tight seal against the housing, whether panel or surface-mounted. APPROVALS See Agency Listing on page 391. FASTEST RESET All 305 timers reset to a full-scale setting within 0.1 sec- ond, proportionately faster for shorter settings. CIRCUIT FLEXIBILITY All the contacts of its two instantaneous and two delayed load switches are externally accessible at a 14 point ter- minal block. LONGEST LIFE With an average mechanical life expectancy of over 5,000,000 operations before the first failure, the 305 is the leader in its class. Noted for its circuit flexibility, the 305E also provides the PILOT LIGHT highest accuracy among analog timers. Available for A built-in pilot light indicates that the timer is running. either ON-Delay or OFF-Delay operation. The 305E provides delay, interval or pulse timing function for up to 7 load circuits through two instantaneous and two delayed switches. It features a plug-in design and cycle progress indication. 151 ON DELAY OPERATION TIMING SEQUENCE** Before During End of The 305 is a synchronous motor-driven timer with CONTACTS Cycle SWITCH Start Cycle an electrically-operated clutch equipped either for * 14-9/6-8 ON-Delay or OFF-Delay operation. INSTANTANEOUS 14-10/6-7 ON DELAY 11-12 When power is applied (start signal on), the clutch DELAYED (D ) 2 solenoid is energized. Two things happen immedi- 11-13 ately and simultaneously, the instantaneous switches 4-5 transfer from one set of contacts to the other, and DELAYED (D ) 1 4-3 the motor begins to drive the cycle progress pointer toward zero. *D trips approximately 1/2% of range after end of cycle. 2 ** Assumes a sustained closed start signal (i.e. longer than the dial set time). At the end of the timed period, the pointer trips one of the delayed switches, a brief time later (about OFF DELAY 1/2% of full scale), the other delayed switch is TIMING SEQUENCE** tripped, stopping the timer motor but leaving the clutch engaged. The timer does not reset until Before During End of power to the clutch is removed. Cycle SWITCH CONTACTS Start Cycle * 14-9/6-8 OFF DELAY INSTANTANEOUS 14-10/6-7 Timing starts when power is removed (start signal off), from the spring-loaded, normally engaged 11-12 clutch. The timer is reset when power is restored DELAYED (D ) 2 11-13 to the clutch solenoid; simultaneously, the instanta- neous contacts are tripped. Action of the delayed 4-5 DELAYED (D ) contacts is the same as with ON-Delay timers. A 1 4-3 power outage stops the motor but does not reset the OFF-Delay 305. *D trips approximately 1/2% of range after end of cycle. 2 ** Assumes a sustained open start signal (i.e. longer than the dial set time). Shown power on BLUE—Circuit Closed GRAY—Circuit Open SPECIFICATIONS LIFE EXPECTANCY HOUSING MECHANICAL: over 5,000,000 Plug-in design; completely gasketed, MODELS operations (average). dust-tight when surface or panel-mounted. Choice of ON-Delay or OFF-Delay opera- CONTACTS: 3,000,000 operations under tion. resistive or inductive load of 1A POWER REQUIREMENTS AC MODELS: 120 or 240V, 50/60 Hz RANGES (AC) TIMING MOTOR (all ranges), (+ 10%, - 10%) 16 standard ranges, from 6 sec to 60 hrs. Synchronous, permanently lubricated DC MODELS: 48, 125 or 250V with at 60 Hz (7 sec to 70 hrs. at 50 Hz) other zener regulations; 28V without zener ranges on special order. TIMING MODES regulation. Single cycle interval or delay. AC MODELS: REPEAT ACCURACY running current--0.128 A (115 VAC). AC MODELS: + 0.2% of full scale (For LOAD SWITCHES inrush current--0.628 A (115 VAC). ranges of 60 sec or less, it may be INSTANTANEOUS: two, each SPDT; necessary to run timer motor before self-cleaning, heavy-duty silver contacts. TEMPERATURE RATING start to achieve related accuracy). DELAYED: two, each SPDT; precision 32° to 140°F (0 to 60°C). DC MODELS: + 1.75% of full scale at type, silver contacts. constant ambient temperature and + 15% CONTACT RATING (non-inductive): WEIGHT voltage variation (48, 125 and 250V 10 amps, 120VAC NET: 2 lb., 6 oz. models); + 3.5% of full scale at constant 5 amps, 240VAC SHIPPING: 2 lb., 12 oz. voltage and 32 to 120°F ambient temper- 1/4 amp, 115VDC. ature variations (all models). MOUNTING ACCESSORIES PILOT LIGHT STANDARD: Hardware is provided to RESET TIME Wired in parallel with motor; standard mount timer so that it is dust-tight from 0.1 sec., full scale. with all AC and DC models. front of panel. OPTIONAL: Surface mounting with front MIN. SETTING TERMINALS or rear-facing terminals. NEMA 12 1/60th of range (all models except: 14 screw terminals accessible at rear; (See Accessory Section of Catalog) 0.3 sec for 6 sec model). integral wiring diagram on timer housing (On DC timers, terminal 10 is not available DIAL DIVISIONS for load circuit use on units rated 48 volts 6 sec., 60 sec., 120 sec., 240 sec., 6 DC or higher). min., 60 min., 120 min., 240 min., 6 hr., and 60 hr. -- 120 Dial Divisions 15 sec., 30 sec., 15 min., 30 min., 15 hr., and 30 hr. -- 150 Dial Divisions 152 TIMERS TIMERS TYPICAL INSTALLATIONS CLUTCH SOLENOID All timers shown in “before start” MOMENTARY START (ON DELAY) position. Diagrams shown with MOTOR power off unless otherwise marked. INDEPENDENT LOADS DEPENDENT LOADS Maximum load current through any load carrying contact is 10 amperes. MOMENTARY STARTING CONTACT ON DELAY–Reset on power failure. SUSTAINED STARTING CONTACT OFF DELay–Non-reset on power failure. LOAD ENERGIZED LOAD DE-ENERGIZED DELAYED CONTACTS INSTANTANEOUS CONTACTS Switch 4-5-3 transfers Contacts are transferred at dial “0”. Switch when clutch is energized; 11-12-13 transfers transferred back, as 1% later. shown when de-energized. SUSTAINED START (ON DELAY) OFF DELAY TERMINAL WIRING WIRING AC WIRING DC WIRING CAUTION!: Power for motor must be jumped from Terminal 1 to 11. Do NOT apply power to Terminal 12. UNIT RATING RESISTOR VALUES DC VOLTS R1 R2 48 800 500 125 4K 30K 250 10K 150K Before starting your design, read the safety statement on the inside back cover of the ATC catalog. 153 ORDERING CODE 305E 101 A 1 0 P X BASIC TYPE RANGE - 60 CYCLES - 120 VAC 101 6 Sec. 004 15 Sec. 006 30 Sec. 007 60 Sec. 008 120 Sec. 011 240 Sec. 029 6 Min. 014 10 Min. 015 15 Min. 016 30 Min. 017 60 Min. 018 120 Min. 019 240 Min. VOLTAGE FREQUENCY PRICE 030 6 Hr. ADDERS 021 15 Hr. A 120/60 022 30 Hr. B 240/60 023 60 Hr. C 120/50 D 240/50 RANGE - 50 CYCLES - 120VAC 441 7 Sec. H 28 VDC 071 18 Sec. J 48 VDC 165 35 Sec. L 125 VDC 166 70 Sec. M 250 V DC 167 140 Sec. K Special 157 280 Sec. 168 7 Min. ARRANGEMENT 049 18 Min. 1 On-delay (reset on power interruption) 169 35 Min. 2 Off-delay (non-reset on power interruption) 170 70 Min. 0 Special 171 140 Min. 160 280 Min. SETTING 164 7 Hr. 0 Knob 161 18 Hr. 5 Key 162 35 Hr. 163 70 Hr. FEATURES P Basic, standard plug-in unit RANGE - DC UNITS X Non plug-in timer 006 30 Sec. X Basic standard unit 007 60 Sec. K Special 008 120 Sec. 011 240 Sec. ACCESSORIES 015 15 Min. 0305-265-65-00: Surface mounting assembly with front facing terminals, less 016 30 Min. timer (for AC timers and 28 V DC timers only) 017 60 Min. 0305-263-64-00: Surface mounting bracket - rear facing terminals 018 120 Min. 019 240 Min. 000 Special Before starting your design, read the safety statement on the inside back cover of the ATC catalog. 154 TIMERS