20

Automatic Timing & Controls

800.727.5646

atcdiversified.com

Precision Switch Cam

Programmer

CYCLE TIMES

Choice of ON-Delay or OFF-Delay operation

(not field-convertible).

Choose from a variety of interchangeable

motors and gears.

See chart for available timing ranges.

REPEAT ACCURACY ±0.25% of cycle time.

SETTING ACCURACY ±0.25% of cycle time.

FRAME SIZES

3, 6, 9 and 12 cam frame sizes are provided

CAMS

NUMBER: 1 to 12 (or multiples up to 12, by

combining timer assemblies); cams

may be factory-set.

CUT:

Standard or 50% cut, as specified

(standard cams allow contact closure

adjustment of 1 to 45% or 55 to 99%,

50% cut cams allow contact closure

adjustment of 12 to 52% or 48 to

88%; custom cams available with

2 or 4 or cuts.

CONSTRUCTION:

Two-inch diameter split type;

made of Delrin

LIFE EXPECTANCY MECHANICAL: over 10,000,000 operations

CONTACTS:

over 1,000,000 operations at

less than 1 amp

SPECIFICATIONS

A compact and motor-driven cam timer, the 324 precisely controls one to

twelve load circuits through easily-set screwdriver adjustable cams. Each

timer provides a wide range of cycle times through a set of interchangeable

gears.

EASY AND PRECISE CAM ADJUSTMENT: With ATC’s unique split-cam

design, each side of the cam is separately screwdriver-adjustable in either

direction: either side determines the precise instant during the cycle when

the switch will actuate, the other side determines how long the switch

will remain actuated. Adjustments are easy and precise: 1/4 turn of the

adjusting screw equals 0.5% of cycle time. A setting disc, calibrated in 1%

increments, facilitates program set-up and indicates cycle progress.

ONE TO TWELVE PRECISION SWITCHES: Whether used as a time or

sequence programmer, the 324 can be ordered with any number of cam-

operated switches from one to twelve. Each SPDT precision switch is rated

at 10 amps, 120 VAC and is 1/3 hp rated at 120 or 240 VAC.

WIDE RANGE OF CYCLE TIMES: The 324 is available with a variety of

synchronous motors. See charts for available timing ranges. Each motor

provides an adjustable range of cycle times, with a ratio of over 2.5:1,

through a set of interchangeable gears. Changing gears is a simple opera-

tion that takes only a few minutes.

ACCURACY: The repeat accuracy and setting accuracy of the 324 are both

within ± 0.25%. Follower fingers precisely track the contour of the cams,

accurately operating the precision switches with quick-break action.

SEQUENCE CONTROL: The 324 can be ordered without a motor and with a

1 inch long shaft extension on either or both ends, for use as a rotary cam

limit switch.

LOAD SWITCHES

TYPE:

Precision switches; one for each cam

CONTACT ACTION: SPDT(Form C)

CONTACT RATING: 10 A at 120 VAC (non-inductive).

1/3 HP at 125/250 VAC

MINIMUM CONTACT 1% of cycle time

ACTUATION TIME:

DRIVE MOTORS

SPEED:

choice of 12

TYPE:

Synchronous; permanently

lubricated; integral slip clutch for

manual advance; anti-backup to

prevent damage to switches

VOLTAGE:

120 VAC, 50 or 60 cycles;

240 VAC, 50 or 60 cycles.

POWER

12 watts max

CONSUMPTION:

DUAL DRIVE:

two motors may be used,

special applications

TORQUE-SPEED

At cycle times of 30 SEC or

CAPABILITIES:

longer, the 324 can drive and

switch 12 contacts simultaneously;

below 30 SEC, the motor may be

limited in its ability to drive or

switch a number of contacts

simultaneously.

TEMPERATURE RATING

32 to 140°F (0 to 60°C)

WEIGHT

NET: from 1-1/2 lbs. for the 3 cam unit up to

3-1/2 lbs. for the 12 cam unit

ENCLOSURES

NEMA 12 molded case for one model 324 with

maximum of 3 cams. (See Accessories) (Optional)

E24305

Automatic Timing & Controls

800.727.5646

atcdiversified.com