18

Motor-Driven Cycle Progress Timer

MODEL

Choice of ON-Delay or OFF-Delay

operation (not field-convertible)

RANGES

11 standard ranges, from 5 SEC to 5 HRS

at 60Hz (6 SEC to 6 HRS at 50 Hz)

REPEAT

– 2% of dial range.

ACCURACY

RESET TIME

150 ms.

MIN. SETTING 5% of dial range.

LIFE

MECHANICAL: 2,500,000 cycles (average)

EXPECTANCY

CONTACTS:

2,500,000 operations under

resistive or inductive load of 1A

TIMING

SINGLE CYCLE: interval, delay or pulse.

MODES

LOAD

INSTANTANEOUS: one, SPDT, precision type.

SWITCHES

DELAYED:

two, SPDT, precision type.

CONTACT RATINGS (non-inductive):

10 A at 120 VAC

5 A at 240V A C

TERMINALS

11-point terminal block on side of housing;

all terminals accept .250" push-on connectors.

Terminals 1, 2, 4, 9 and 11 are split

connectors for use with either one .250" or

two .110" push-on connectors.

POWER

120, 50 or 60 Hz. (±10%, - 15%)

REQUIREMENTS Running Current

121 mA (14.5 VA)

at 120V

Inrush Current

157 mA (18.9 VA)

at 120V

TEMPERATURE 32° to 120°F (0° to 50°C)

RATING

WEIGHT NET:

1 lb. 8 oz

SHIPPING: 2 lbs.

SPECIFICATIONS

NOTE: Some timing ranges are still available at 240VAC.

Check with ATC.

OPERATION

WIRING

A Dial-Adjustable TDR with cycle progress indication, the ATC 322 can

also be used as a low-cost automatic reset timer for a wide range of

interval, delay and pulse timing functions, in either ON-delay or

OFF-delay operation.

COST EFFECTIVE VERSATILE TIMING FUNCTIONS: The 322 provides

the versatile timing functions and features of much more expensive

automatic reset timers.

INSTANTANEOUS AND DELAYED LOAD SWITCHES: Because the

standard 322 includes an instantaneous switch as well as two delayed

switches, it can be used in the On-Delay mode for interval and/or

delayed control, with either a momentary or sustained start signal.

All three switches are mounted on a sliding deck which facilitates

replacement and maintenance.

SURFACE OR FLUSH MOUNT: The 322 is provided with hardware

for surface mounting or, if desired, flush mounting through a single

15/16" OD cutout in a 1/8" panel.

CYCLE PROGRESS INDICATION: A pointer in the dial knob rotates

during the cycle, continuously showing the time remaining until

time-out.

The 322 is a synchronous motor-driven timer with an electrically-

operated clutch equipped either for On-Delay or Off-Delay operation.

ON-DELAY: When power is applied (start signal sustained on), the

clutch engages, the motor begins to drive a cam toward its zero

position, and the instantaneous switch transfers from one set of con-

tacts to the other. At the end of the timed period, the cam trips one

of the delayed switches, but the motor continues to run. A brief time

later (about 2-1/2% to 5% of full scale), the cam trips the second

delayed switch, stopping the motor but leaving the clutch engaged.

The 322 resets when power is removed from the clutch.

OFF-DELAY: Timing begins when power is removed (start signal off)

from the spring-loaded, normally-engaged clutch. The timer resets

when power is restored to the clutch, thus disengaging it and transfer-

ring the instantaneous switch from one set of contacts to the other.

Action of the delayed contacts is the same as with the On-Delay timer.

A power outage stops the motor but does not reset the Off-Delay 322;

the timer completes the interrupted cycle when power is restored.

E24305

Automatic Timing & Controls

800.727.5646

atcdiversified.com