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Cutler-Hammer

Instruction Manual—80 Series Photoelectric

8280A Time Delay Logic Card

INTRODUCTION

The 8280A is an optional logic card for the 80 Series "Blue

Eyes" Control Modules. The 8280A provides three ranges of

independently adjustable on and off delay.

By themselves, the control modules provide a simple on-off

control action through either a triac output or NPN transistor.

Control actions take many forms; start up and shut down

sequences, counting, sorting, or jam detection are some of the

possibilities. The on-off state of the control module's output

depends on the status of the infrared light beam established by

a sensor head. The light beam is either complete (LT) or

blocked (DRK).

The addition of time delay to a control module's operation

separates the instant of the LT/DRK change from the start of

the control action. Time delay makes it possible for the control

module to ignore short duration LT/DRK changes and/or to

stretch the apparent length of a LT/DRK change.

INSTALLATION

1. Remove the sensor head if installed.

2. Remove the pin guide.

3. Set the appropriate switches for the timing range desired.

4. Orient the logic card so that the adjustment

potentiometer(s) face out.

5. Slide the logic card all the way into the control module and

replace or install the sensor head. Be sure that the sensor

module's bayonet pins line up properly with the logic

card's receptacles. The logic card is connected to the

control module's circuit only when the sensor head is

plugged in.

6. Adjustment within the timing range selected can now be

made via the potentiometer(s) on the logic card.

Potentiometers

This side in

SPECIFICATIONS

Input Power:

Supplied only by the 80 Series Control Modules; do not

connect the one-shot card to external power.

Timing Range:

5 mS to 20 seconds in three ranges:

Range 1 ........................................... 10 mS to 200 mS

Range 2 .................................... 100 mS to 2.5 seconds

Range 3 ..................................... 1.0 mS to 20 seconds

Power Up Initialization:

Time delay settings are disabled for 20 mS on power up. The

8280A assumes the control modules settings and beam status.

Note- For all Series 80 control modules, the output(s) are

Environmental:

Operating Temperature ............... -40° to 131°F (-40° to 55° C)

Storage Temperature ................. -40° to 167° F (-40° to 75° C)

Operating Humidity ............................... 95% Relative Humidity

Storage Humidity ......................... 95% Relative Humidity, Max.

Mechanical:

Construction - The 8280A consists of a single PCB assembly

configured to interface with the Series 80 sensor system.

Vibration - 5 G or 0.06 inch displacement, whichever is less,

over a frequency range of 10 Hz to 2000 Hz

Range Switches

inactive (open) for 100 to 300 mS after power is applied

regardless of control settings or the light beam's status.

104232 Rev 02