Precision Switch Cam Programmer for Multi-Circuit Sequence Control

ATC Diversified Electronics offers the 324C Precision Switch Cam Programmer, a compact motor-driven cam timer designed for repeat-cycle timing and machine sequence control. The 324C can control from one to twelve load circuits through individually adjustable cam-operated switches, allowing multiple electrical events to be programmed within a single repeating cycle.

Each switch uses ATC's split-cam adjustment. One side of the cam determines the point in the cycle when the switch actuates, while the other side determines how long the switch remains actuated. This allows the timing and duration of each output to be adjusted independently within the overall machine cycle.

Interchangeable gears provide multiple cycle-time options, while a calibrated setting disc helps with program setup and cycle-progress indication. The 324C is well suited for industrial machinery and process applications that require multiple timed outputs to repeat in a defined sequence.

Why Choose the ATC 324C Cam Programmer?

Control Up to Twelve Circuits: The 324C can be equipped with one to twelve precision cam-operated switches, allowing several loads or control functions to be sequenced from one timer.

Independent Cam Adjustment: ATC's split-cam design allows the switch actuation point and duration to be adjusted independently with a screwdriver.

Fine Timing Adjustment: A quarter-turn of the cam adjustment screw corresponds to approximately 0.5% of the total cycle time, supporting precise setup of individual switching events.

Cycle-Progress Indication: A setting disc calibrated in 1% increments helps operators set switching points and visually reference progress through the timing cycle.

Multiple Cycle-Time Options: Interchangeable gears and available synchronous motors allow the overall cycle time to be matched to the requirements of the application.

Repeatable Sequence Control: The 324C provides repeat and setting accuracy within ±0.25% for consistent multipulse repeat-cycle operation.

Rotary Cam Limit Switch Option: The 324C can also be ordered without a timing motor and with a shaft extension for use as a mechanically driven rotary cam limit switch.

Multipulse Repeat-Cycle Timing

Unlike a basic time delay relay that controls one timed event, the 324C multipulse repeat-cycle timer can generate several switching events during one complete cycle. Each installed cam controls its corresponding switch independently.

This makes it possible to energize and de-energize multiple circuits at different points in the same repeating sequence. Once the shaft completes one rotation, the programmed sequence repeats.

Precision Split-Cam Programming

Each 324C switch is operated by an adjustable split cam. One cam adjustment establishes when the output changes state, while the other determines how long that output remains actuated.

Because the two settings can be adjusted independently, one output may operate briefly near the beginning of the cycle while another can remain active for a longer portion later in the sequence. This provides flexible mechanical programming without requiring a separate timer for every switching event.

One to Twelve Precision Switch Outputs

The 324C can be configured with one through twelve SPDT precision switches. Each switch is rated for 10 amps at 120 VAC and 1/3 horsepower at 120 or 240 VAC.

The number of installed switches can therefore be matched to the number of individual control events required by the machine or process.

Adjustable Cycle Times with Interchangeable Gears

The 324C uses synchronous timing motors and interchangeable gears to provide a broad selection of cycle times. Each motor configuration supports multiple gear-selected cycle periods, allowing the same cam-programming concept to be applied to faster or slower machine sequences.

Gear changes are designed to be straightforward, allowing cycle duration to be changed without altering the individual concept of the programmed cam sequence.

Cam Timer or Rotary Cam Limit Switch

In its motor-driven configuration, the 324C functions as a precision cam timer and sequence programmer. ATC also offers the unit without a motor and with a 1-inch shaft extension on either or both ends for applications requiring a mechanically driven rotary cam limit switch.

This configuration allows switch operation to be synchronized directly with the position of external machinery rather than with elapsed time.

Find the Right 324C Cam Programmer Configuration

Selecting the right precision switch cam programmer depends on the required overall cycle time, number of switching outputs, load ratings, timing-motor configuration, desired switch actuation points, actuation duration, and whether the application requires motor-driven timing or mechanically driven position sequencing.

Explore the ATC 324C above to configure the number of precision switches, cycle timing, and sequence-control arrangement required for the application.