ATC, 353C-346-D-30-PX, 353C Series Shawnee II Digital Programmable Timer 999.9 Sec Range, 240/50 Voltage with Display (On Delay), Basic Plug-in Unit
Features:
- Control Versatility
- Computer Tested Reliability
- Save 40% in Panel Space and Cost
- Range: 999.9 Sec
- Noise Immunity
- Cycle Progress Indication
- Outstanding Repeat Accuracy
- Cycle Progress Indication
- Plug-In and Dust Tight
- Voltage: 240/50
- Display (On Delay)
- Basic Plug-in Unit
A compact version of the versatile 333 Timer, the ATC 353C is its exact functional 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 353C.
Control Versatility
The 353 operates either as a repeat cycle pulse generator or in single-cycle interval or delayed mode. You choose the kind of control action you want by installing jumpers on the terminal block. It also provides a choice of control output.
Computer Tested Reliability
The solid-state 353 is manufactured 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 353's only significant mechanicalcomponent - has a life expectancy of 100,000,000 operations (no load), while the optional solid-state switch module has virtuallyunlimited life expectancy. As a result, the 353 achieves an overall reliability that surpasses even the high level achieved by previous Shawnee timers.
Save 40% in Panel Space and Cost
Packaged in a 72mm² DIN-size housing, the 353 occupies 40% less panel space than previous IC timers. Modern production and assembly techniques have substantially reduced manufacturing costs and resulted in a 45% cost saving.
Wide Range
Shawnee II 353 timer covers the overall span of 0.01 Sec to 999.9 Sec in four field-convertible ranges.
Easy to Set
The Shawnee timer is easily and accurately seteven 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.
Noise Immunity
The 353 does not have to be shielded: its transformer power supply, full-wave bridges, buffered logic and other design characteristics render it immune to the electrical noise that is sometimes encountered in industrial environments thus eliminating false starts and reset due to voltage spikes.
Cycle Progress Indication
The Shawnee 353 indicating timer provides cycle progress indication on a four-digit display located immediately above the digital setting number wheels.Outstanding Repeat Accuracy
Unsurpassed among industrial timers regardless of cost, the Shawnee 353 has a repeat accuracy of ± 10 milliSeconds on any setting within its overall range of 999.9 Sec, even in the face of wide swings in temperature or voltage and regardless of the amount of reset time between cycles.
Plug-In and Dust-Tight
353 timers feature true plug-in design and are dust-tight from the front of panel.
Operation:
The Shawnee 353 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
- comparator that continuously examines the outputs of the clock and ROM.
When power is applied (start signal on), the clock 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 353 times out. At that instant, the clock turns itself off automatically. At the same instant, the 353 generates one type of control action or another,depending on how it is wired. When the 353 is wired for interval operation, the timer's output device (either the standard SPDT relay or the optional SPST switch module) is energized from the start to the end of the time cycle so is the -24 VDC output at terminal 16. When the 353 is wired for delayed control, the output device is energized at the end of the cycle and remains on until the timer is reset; so is the -24 VDCoutput. When the 353 is wired as a repeat cycle pulse generator, the output device and the DC signal are both off until the end of the cycle, at which time they are both on for about 80 mSec. The length of the pulse is included in the time cycle: the cycle runs from the start of one pulse to the start of the next. The 353 automatically starts a new cycle immediately after reset.
For more information, please see 
Data Sheet
