355C ATC | Alldatasheet

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PANEL MOUNTED DIGITAL TIMERS 355C Series Shawnee II Digital Reset Timer A compact version of the 335 Timer, the ATC 355 is its exact func- tional duplicate, packaged in a 72mm2 DIN-Size housing, it occupies 40% less panel space and costs proportionately less. Modern production and assembly techniques have all but eliminated hand wiring, enhancing the reliability and life expectancy of the 355. COMPUTER TESTED RELIABILITY: The Solid-State 355 is manufac- tured from a series of computer-tested plug-in circuit boards and assembled virtually without hand wiring. Because it has no moving parts in its logic circuits, its life expectancy is practically unlimited. Even the load relay — the 355’s only significant mechanical compo- nent — has a life expectancy of 100,000,000 operations (no load). As a result, the 355 achieves an overall reliability that surpasses even the high level achieved by previous Shawnee timers. CYCLE PROGRESS INDICATION: The Shawnee indicating timer provides cycle progress indication on a four-digit display located immediately above the digital setting number wheels. PLUG-IN AND DUST-TIGHT: All 355 timers feature true plug-in de- sign and can be replaced in seconds without disturbing the housing or disconnecting the wiring. The dial assembly is gasketed so that the timer body is dust-tight from the front of panel. WIDE RANGE: Each Shawnee 355 timer covers the overall span of 0.01 SEC to 999.9 MIN in two field-convertible ranges. The 355 indicating timer also offers two additional field-convertible ranges of 0.1-999.9 SEC or MIN EASY TO SET AT ALL TIMES: The Shawnee timer is easily and ac- curately set even with work gloves on. Push any of its four toggle levers in any sequence until the number you want appears above it. You can decrease as well as increase each number by pushing the levers up or down. You can change the setting at any time, even during a cycle. SAVE 40% IN PANEL SPACE AND COST: Packaged in a 72mm2 DIN- size housing, the 355 occupies 40% less panel space than previ- ous IC timers. Modern production and assembly techniques have substantially reduced manufacturing costs and resulted in a 45% cost saving. OUTSTANDING REPEAT ACCURACY: Unsurpassed among industrial timers regardless of cost, the Shawnee has a repeat accuracy of ±10 milliseconds on any setting within its overall range of 999.9 MIN, even in the face of wide swings in temperature or voltage and regardless of the amount of reset time between cycles. NOISE IMMUNITY: The 355 does not have to be shielded: its trans- former power supply, full-wave bridges, buffered logic and other design characteristics render it immune to the electrical noise that is encountered in typical industrial environments MODEL NUMBER MODEL NUMBER 355C 30 P RANGE

999.9 SEC 346

999.9 MIN 347

99.99 SEC 351

99.99 MIN 352

VOLTAGE & FREQUENCY 120/60 A 240/60 B 120/50 C 240/50 D ARRANGEMENT With Display (On Delay) 30

FEATURES

ACCESSORIES: Surface mounting bracket kit 353-260-27-00 Retrofit kit 305-265-61-70 The 355C Directly Replaces 355B & 355A Functional Replacement for the 335 Timer E48329

Automatic Timing & Controls 800.727.5646 atcdiversified.com PANEL MOUNTED DIGITAL TIMERS 355C Series OPERATION The Shawnee 355 operates on a digital logic circuit with three main elements: a clock which uses utility line frequency of 50 or 60 Hz as its time base; a read-only-memory (ROM) whose output is set by the timer's digital setting number wheels; and a comparator that continuously examines the outputs of the clock and ROM. When power is applied (start signal on), two things happen simultaneously; the instantaneous DPDT relay is energized transferring both sets of contact, and the clock circuit begins to count each cycle of the utility line frequency. Translating this count into hundredths of a second, the clock accumulates it and feeds it continuously to the comparator. When clock output exactly equals the output of the ROM, the comparator causes the 355C to time out. At this point, (1) the DPDT delay relay is energized, immediately transferring both sets of contacts and (2) the clock turns itself off automatically. Since the clock stops counting even if the start signal remains on, it is not necessary to tie up one of the 355C's delayed contacts to do this job. To reset the Shawnee 355, power must be removed from terminal 1 (L1) for 75 milliseconds or more. The 355 operates in the On-Delay mode only, always resetting whenever there is a power outage and starting a new cycle when power is restored. CYCLE PROGRESS INDICATION: When the timer is in the reset condition, the LED display is blank. During the timing cycle, the display counts up from zero, thus always indicating the amount of time that has elapsed since the start of cycle. At time-out, the display shows total elapsed time and exactly equals the numbers on the digital setting wheels. SPECIFICATIONS RANGES 0.01 - 99.99 SEC 0.01 - 99.99 MIN 0.1 - 999.9 SEC 0.1 - 999.9 MIN Four field-convertible ranges TIMING Single Cycle interval or delay MODES Repeat Cycle pulse (fixed at approx. 50 mSEC) CYCLE 4 digit, 0.3 inch, high intensity, blue display PROGRESS INDICATOR REPEAT ±0.01 SEC on all ranges ACCURACY RESET TIME 75 milliseconds MINIMUM 99.99 SEC of MIN ranges: 0.01 SEC or MIN, SETTING respectively 999.9 SEC or MIN ranges: 0.1 SEC or MIN, respectively LOAD Number two, one instantaneous and RELAYS one delayed; both plug-in DPDT Operate Time 20 mSEC, max. Release Time instantaneous — 20 mSEC, max. delayed — 75 mSEC, max. Contact Rating 5A @ 120 VAC Resistive, 5A, 30 VDC Resistive Life 100 million operations (no load) TEMPERATURE 32° to 140°F (0 to 60°C) RATING POWER 120V 95-132V at 50 or 60 Hz REQUIREMENTS inrush — 0.2 A running — 0.04 A 240V 190-264V AT 50 OR 60 Hz inrush — 0.1 A running — 0.02 A Clock Input Voltage 95-132V rms (120V Model) 190-264V rms (240V Model) Current 20 mA max. Frequency 0 to 1000 Hz (sinusoidal) TERMINALS 16 screw terminals accessible at rear; integral wiring diagram on housing HOUSING Plug-in design; completely gasketed, dust-tight when panel-mounted MOUNTING Standard Hardware is provided to mount ACCESSORIES timer so that it is dust-tight from See Accessory front of panel section of Optional Surface mounting without and with catalog front-facing terminals) WEIGHT NET: 1 lb., 7 oz. SHIPPING: 2 lbs Switching Sequence: Assumes a sustained closed start signal (i.e. longer than the setting on the digital display.) RELAY CONTACTS Before During End of Start Timing Cycle Instantaneous 14-9/6-8 14-10/6-7 Delayed 11-12/4-5 11-13/4-3 BLACK-Circuit Closed GRAY-Circuit Open Automatic Timing & Controls 800.727.5646 atcdiversified.com

PANEL MOUNTED DIGITAL TIMERS 355C Series DIMENSIONS (INCHES)TYPICAL INSTALLATIONS WIRING TERMINAL WIRING SUSTAINED START MOMENTARY START POWER SUPPLY CLOCK INDEPENDENT LOADS DEPENDENT LOADS MOMENTARY STARTING CONTACT SUSTAINED STARTING CONTACT LOAD ENERGIZED LOAD DE-ENERGIZED DELAYED CONTACTS Contacts transfer simultaneously when unit "times out" and all digits are zero. All timers shown in "before start" position. Diagrams shown with power off unless otherwise marked. Maximum load current through any load carrying contact is 5 amperes. Pilot lights leads are brought out to terminal block. Pilot light can be wired to show practically any desired function timer energized, cycle running instantaneous or delayed switch closed. etc. INSTANTANEOUS CONTACTS Contacts are transferred when power supply is energized, transferred back as shown when de-energized.