Cutler-Hammer 8282A Buku Petunjuk - Halaman 2

Jelajahi secara online atau unduh pdf Buku Petunjuk untuk Kelistrikan Industri Cutler-Hammer 8282A. Cutler-Hammer 8282A 2 halaman. 80 series photoelectric retriggerable one-shot logic card

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Page 2

CONTROLS AND ADJUSTMENTS

The timing range and triggering mode are switch selected

according to the chart printed on the label. Paste the label on

the inside of the control module's side cover for future

reference. The length of the one-shot pulse may be varied,

within the range selected, by adjusting the pulse width

potentiometer (clockwise = increase). The 8282A is equipped

with a second potentiometer for adjusting the start up delay

period.

8282A

RETRIGGERABLE

ONE SHOT

TRANSITION

LT - DRK

DRK - LT

RANGE (SEC)

.01 - .20

.10 - 2.50

Slide the numbered switch upward for the "ON" position. In the

example below, 1 and 2 are set to "ON," and 3 is "OFF."

The one-shot pulse produced by the 8282A is transition

triggered, that is, a light or dark change in the infrared light

beam is used to start the one-shot timer pulse. Either the LT to

DRK, or DRK to LT transition may be selected to trigger the

one-shot. Note, however, that with the installation of a one-

shot logic card, the control module's output is governed by

the settings of the logic card rather than the status of the

infrared light beam. For the following timing diagrams,

assume that the LT to DRK transition has been selected as the

trigger.

Still Need Help?

Contact the

Cutler-Hammer Sensor

Application Engineers

1-800-426-9184

Fax: 425-513-5356

INCR

TO 27

SEC.

PULSE

START UP

WIDTH

DELAY

OFF

Cutler-Hammer

720 80th Street SW

Everett, WA 98203-6299

425/513-5300 Fax: 425/513-5302

www.cutlerhammer.eaton.com

Effective 5/20/97

Printed in U.S.A.

TIMING DIAGRAM:

Condition 1 - The power up delay period for the 8282A is user

adjustable from 0.4 to 27 seconds. The adjustable power up

delay prevents the one-shot from initiating any control action

until the machine or process being monitored reaches normal

operating speed.

Condition 2 - In this example, the LT to DRK transition has

been selected as the trigger; operation with the DRK to LT

transition is similar. The one-shot pulse starts at the first

appropriate transition following the power up delay period.

Note that the one-shot pulse length, "T", is constant regardless

of how long the infrared light beam is blocked.

Condition 3 - A retriggerable one-shot pulse, once started by a

LT/DRK transition, can be extended indefinitely if a LT/DRK

transition always occurs before the end of the preset time

period, "T".

Control Module

Output

Dark

Mode

Light

Mode

104419 Rev 02