ATC-Automatic Timing & Control 322B Series Data Sheet

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.

PRICE/PERFORMANCE VALUE: Although it is priced like a TDR, 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.

OPERATION

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.

WIRING

E24305

Motor-Driven Cycle Progress Timer

SPECIFICATIONS

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 or 240V, 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.

ELECTROMECHANICAL TIMER 322B Series

Automatic Timing & Controls

RANGE - 60HZ- 120 VAC

5 SEC 114
10 SEC 003
20 SEC 005
40 SEC 115
60 SEC 007
150 SEC 009
5 MIN 012
10 MIN 014
40 MIN 056
60 MIN 017
5 HR 113

RANGE - 50 HZ - 120 VAC
6 SEC 101

12 SEC 116
24 SEC 117
48 SEC 118
72 SEC 073
180 SEC 119
6 MIN 029
12 MIN 047
48 MIN 058
72 MIN 061
6 HR 030
Special 000

ELECTROMECHANICAL TIMER 322B Series

VOLTAGE
FREQUENCY

120/60 A
240/60 B

120/50 C
240/50 D
Special K

MODEL NUMBER

MODEL NUMBER 322B 2

RANGE

VOLTAGE & FREQUENCY

ARRANGEMENTS

ON-DELAY (reset on power interruption) 1
OFF-DELAY (non-reset on power interruption) 2
Special 0

SWITCH DIFFERENTIAL

2-1/2% - 5% of dial range 2

FEATURES

STANDARD surface mounting unit, clutch contact CS
SPECIAL CK

DIMENSIONS (INCHES/MILLIMETERS)

ON DELAY

Timing Sequence**

SWITCH CONTACTS Before During End of
Start Cycle Cycle *

Instantaneous
4-5

Delayed (D2)
11-7

Delayed (D1)
9-8

* D2 trips approximately 2-1/2% of range after end of cycle.

** Assumes a sustained closed start signal (i.e. longer than the
dial set time).

OFF DELAY

Timing Sequence**

SWITCH CONTACTS Before During End of
Start Cycle Cycle *

Instantaneous
4-5

Delayed (D2)
11-7

Delayed (D1)
9-8

* D2 trips approximately 2-1/2% to 5% of range after end of
cycle.

** Assumes a sustained closed start signal (i.e. longer than the
dial set time).

4-3

11-6

9-10

4-3

11-6

9-10

*

*

BLACK
Circuit Closed

GRAY
Circuit Open

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Automatic Timing & Controls