132

OPERATION

WIRING

SPECIFICATIONS

The Shawnee 356 operates on a digital logic circuit with three main

elements: a pulse circuit; 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 pulse circuit and ROM.

When power is applied (start signal on), two things happen simulta-

neously; the instantaneous DPDT relay is energized transferring both

sets of contacts, and the pulse circuit begins to count each input

pulse whose duration is at least 1 millisecond. The pulse circuit accu-

mulates the count and feeds the total continuously to the comparator.

When pulse circuit output exactly equals the output of the ROM, the

comparator causes the 356 to count out.

At this point, (1) the DPDT delay relay is energized, immediately

transferring both sets of contacts and (2) the pulse circuit turns itself

off automatically. Since the pulse circuit stops counting even if the

start signal remains on, it is not necessary to tie up one of the 356’s

delayed contacts to do this job.

To reset the 356, power must be removed from terminal 1 (L1) for 75

milliseconds or more. The 356 operates in the on-delay mode only,

always resetting whenever there is a power outage and starting a new

cycle when power is restored.

RANGE

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

in 10 count increments.

COUNT INPUT

2300/MIN with 1:1 on-off time

4000/MIN with 1 mSEC on: 13 mSEC off

500/MIN with 20 mSEC on and 100 mSEC off

Wired for count and repeat operation

Min. Pulse ON Time: 1 mSEC

Min. Pulse OFF Time: 13 mSEC

Ready-To-Count

10 mSEC after application of

Time

power to terminals 1 and 2

Bounce Immunity 6 mSEC

(max. bounce open time)

Pulse Contact Req. 30mA (at line voltage)

CYCLE PROGRESS 4 digit, 0.3 inch, high intensity, blue display.

INDICATOR

REPEAT

100%

ACCURACY

RESET TIME

75 mSEC minimum

MINIMUM

1 count

SETTING

COUNT

Single Cycle

interval or delayed

CONTROL MODES Repeat Cycle

pulses

LOAD RELAYS

Number

two, one instantaneous and one

delayed; both plug-in, DPDT

Operate Time

20 mSEC max.

Release Time

instantaneous –20 mSEC, max.

delayed–75 mSEC, max.

Contact Rating

5A at 120 VAC.

2A at 240 VAC,

0.1A at 125 VDC

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 -0.4A

running —0.08A

240V

190-264V at 50 or 60Hz

inrush - 0.2A

running—0.04A

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

See Accessory

from front of panel.

section of catalog

Optional

Surface mounting without and

with front-facing terminals.

WEIGHT

NET: 1 lb., 7 oz.

SHIPPING: 2 lbs

TERMINAL WIRING:

INDICATING MODEL

Switching Sequence*

RELAY

CONTACTS

Before

During

End of

Start

Timing

Cycle

Instantaneous 14-9/6-8

14-10/6-7

Delayed (D2)

11-12/4-5

11-13/4-3

*Assumes a sustained closed start signal (i.e. longer than

the setting on the digital display)

BLACK– CIRCUIT CLOSED

GRAY– CIRCUIT OPEN

Automatic Timing & Controls

800.727.5646

atcdiversified.com

Automatic Timing & Controls

800.727.5646

atcdiversified.com