ATC-Automatic Timing & Control 354C Series Data Sheet

E48329

Shawnee II High Speed Counter

MODEL NUMBER

MODEL NUMBER 354C 30 P

RANGE

9,999 Counts 350
99,990 Counts (units digit blind) 353
Special 000

VOLTAGE & FREQUENCY
120 VAC 50-60 Hz Q
240 VAC, 50-60 Hz R

ARRANGEMENT

With Display (On-Delay) 30

PREDETERMINING COUNTERS 354C Series

FEATURES
Basic plug-in unit P

Standard unit X
With solid-state output module J
Special K

ACCESSORIES
Surface mounting bracket kit 0353-260-27-00
Retrofit kit 0305-265-61-70

The solid-state 354 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 354’s only signifi-
cant mechanical component—has a life expectancy of 100,000,000
operations (no load), while the optional solid-state switch module has
a virtually unlimited life expectancy. As a result, the 354 achieves an
overall reliability that surpasses even the high level achieved by previ-
ous Shawnee counters.

CYCLE PROGRESS INDICATION: The Shawnee 354 indicating counter
provides cycle progress indication on a four-digit display located imme-
diately above the digital setting number wheels. While the non-indicating

EASY TO SET AT ALL TIMES: The Shawnee counter 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.

NOISE IMMUNITY: The 354 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 sometimes
encountered in industrial environments thus eliminating false starts and
reset due to voltage spikes.

PLUG-IN AND DUST-TIGHT: All 354 counters feature true plug-in design
and are dust-tight from the front of panel.

100% ACCURATE AND BOUNCE-PROOF: The repeat accuracy of the
Shawnee 354 is 100% at all rated speeds, even in the presence of con-
tact bounce. The 354 has two selectable levels of bounce suppression:
a normal level which eliminates false counts at speeds up to 500 per
second with reed switch inputs, and 5,000 per second with DC voltage
pulses; and a high level, for speeds up to 80 per second with high-
bounce contact closures (relays, precision switches, etc.).

HOUSING, IT OCCUPIES 40% LESS: Packaged in a 72mm2 DIN size
housing, the 354 occupies 40% less panel space than previous IC coun-
ters. Modern production and assembly techniques have substantially
reduced manufacturing costs resulting in a 45% cost saving.

CONTROL VERSATILITY: The 354 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, a standard plug-in
SPDT relay or an optional SPST solid-state switch module...plus an
independent and separate DC output signal at Terminal 6.

DIMENSIONS (INCHES/MILLIMETERS)

The 354C Directly Replaces 354B & 354A.

Automatic Timing & Controls

OPERATION

The Shawnee 354 operates on a digital logic circuit with three main ele-
ments: input circuits which allow it to count various types of DC pulses;
a read-only-memory (ROM) whose output is set by the counter’s digital
setting number wheels; and a comparator that continuously examines
the outputs of the input circuit and ROM. When the start (ready/reset)
signal is on, the input circuit begins to count incoming pulses, feeding
the total count continuously to the comparator. When input circuit output
exactly equals ROM output, the 354 counts out. At that instant, the input
circuit automatically turns itself off even if the start signal remains
on; it is therefore not necessary to turn off the pulses externally. At
the same instant, the 354 provides one of three load control actions
depending on how it is wired (see Typical Applications). When the 354
is wired for interval operation, the counter’s output device (either the
standard SPDT relay or the optional SPST switch module) is energized
from the start to the end of the count cycle; so is the DC output at
terminal 6.

SPECIFICATIONS

CYCLE PROGRESS Indicating model only–digit, 0.3 inch, high
INDICATOR intensity, blue display

RANGE 1 to 9999 counts or 10 to 99,990, presettable

in 10 count increments.

PULSE INPUTS
Min. Open Resistance 1 megohm
Max. Closed Resistance 20K ohms.
Switch Requirements 10mA, 30V

With normal bounce immunity–for Reed
Switches (Terminal 9 jumpered to 13)

Max. Count Rate 500/SEC
Min. Closed Time 100 μSEC
Min. Open Time 1 mSEC
Max. Open Time for 0.3 mSEC
Any Single Bounce

bounce immunity–for Precision Switches
(Terminal 9 jumpered to 10 and 11)

Min. Closed Time 30 μSEC
Min. Open Time 6 mSEC
Max. Open Time for 2.5 mSEC
Any Single Bounce

VOLTAGE Positive Polarity On at 4.5V min.
INPUTS Off at 1.0V max

Negative Polarity On at 3.0V min.
Off at 1.0V max.
Max. Continuous Input 40V.
Ripple Voltage Must not go below min. req.
Input Impedance 5K ohms
Min. ON Time 60 μSEC
Min. OFF Time 100 μSEC
Count Rate 5K Hz max.
Rise and Fall Time Req. none.

DELAYED MODE Relay Operate Time 20 mSEC max.
(after coincidence)
Relay Release Mode 20 mSEC max.

INTERVAL MODE Relay Operate Time 15 mSEC max.
Relay Release Time 25 mSEC max.
(after coincidence)

AUTOMATIC Pulse On time (with relay)
RECYCLE MODE 80 mSEC, + 20 mSEC (may be shortened or

lengthened by installing a resistor or capacitor,
respectively, across Terminals 12 and 14; see
Application section for details)

Isolated Contact Input (Dry)

Count Rate and Bounce Immunity

Count Rate and Bounce Immunity with maximum

Max. Count Rate 80/ SEC

START
(READY/RESET) Positive Polarity ready at 4.5V MIN
SIGNAL reset at 1.0V max.

Max. Continuous Input 40V
Ripple Voltage must not go below MIN req.
Input Impedance 5K ohms
Ready-to-Count Time 0.5 mSEC max (after applica-
tion of voltage to Terminal 7)
Circuit Reset 1 mSEC max.
Ready-To-Dropout 20 mSEC max.

Start Switch Requirements (isolated contact)

Min. Open Resistance 1 megohm
Max. Closed Resistance 20K ohms

Min. Duration 50 μSEC
Start Signal
Max. Duration continuous
Start Signal
Reset when signal is removed after
count-out.

LOAD RELAY LIFE 100,000,000 operations
(no load)
Contact Rating 5 A at 120 VAC, 3 A at
28 VDC 1/20 HP at 120 VAC

SOLID-STATE Switches external DC voltage supply of positive
SWITCH polarity, 4 to 30V, 50 mA max.; factory-wired to
MODULE Terminals 3 and 5 (detailed description of operation
(OPTIONAL) in Installation Instruction)

DC OUTPUT Voltage ON– -24V+10%
(TERMINAL 6) OFF– -1V or less

Current with relay –5mA max.
without relay –40mA max.
Impedance on– 10 ohms max., off–10K ohms.

DC POWER Voltage 24V+10%
SUPPLY OUTPUT Current 40mA max
(TERMINAL 8)

POWER 120V 95 to 132V, 50/60 Hz
REQUIREMENTS inrush–0. 4A

running–0.04A.
240V 190 to 264V, 50/60 Hz
inrush–0.2A
running–0.02A.

TEMPERATURE 32° to 140°F (0 to 60°C)
RATING

MOUNTING Standard Hardware is provided to mount counter so

that it is dust-tight from front of panel.
Optional Surface mounting with front facing terminals.
NEMA 12 molded case (1 counter)

WEIGHT NET: 1 lb., 7 oz. SHIPPING: 2 lbs.

Voltage Requirements

Switch Rating 10mA, 30V

Latching Mode Operation (interval only)

PREDETERMINING COUNTERS 354C Series

When the 354 is wired for delayed control, the output device is
energized at the end of the cycle and remains on until the counter is
reset; so is the DC output.

When the 354 is wired as a repeat cycle pulse generator, the output
device and the DC signal are both off until the end of the count cycle,

Automatic Timing & Controls

at which time they are both on for about 80 mSEC From the instant that
the output pulse comes on, the 354 stops counting for 500 μSEC while
it resets; it automatically begins a new cycle and starts counting pulses
again immediately after reset. The duration of the pulse generated by the
354 can be easily lengthened or shortened by wiring a capacitor or resis-
tor across terminals 12 and 14 (see Typical Applications).