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Automatic Timing & Controls

800.727.5646

atcdiversified.com

OPERATION

TYPICAL INSTALLATIONS

As soon as power is applied to terminals 1 & 2 of the timer, the

instantaneous relay is energized and changes the states of its associ-

ated contacts (8-6-7 & 9-14-10). The timer then looks for terminal 15

(the clock terminal) to receive power. When terminal 15 is powered, the

internal clock circuit is enabled and the timer starts to time. When the

internal clock time equals the time set on the front face, the delayed

relay energizes and changes the states of its associated contacts (3-4-5

& 13-11-12). The timer is reset by removing power from terminal 1 for

at least 60 msec. At reset, both relays revert back to their shelf (without

power) state.

SPECIAL NOTE FOR UNITS WITHOUT DISPLAYS: On nondisplay units,

terminals 1 & 15 are jumpered together internally. As soon as power is

applied, the instantaneous relay energizes and the timer starts to time

immediately.

DISPLAY INFORMATION: The digital display can be set to time up or

down by simply moving a DIP switch on the circuit board.

MODE:

• 30PX STOP (Time up/down to time set, transfer delayed relay,

and stop timing).

• 50PX GO (Time up/down to time set, transfer delayed relay, and

continue timing until unit is reset).

POWER SUPPLY

CLOCK

INDEPENDENT LOADS

DEPENDENT LOADS

MOMENTARY STARTING

CONTACT

SUSTAINED STARTING

CONTACT

LOAD ENERGIZED

LOAD DE-ENERGIZED

DELAYED CONTACTS

Contacts transfer

simultaneously when

unit "times out" and

all digits are zero.

KEY SYMBOLS

SUSTAINED START

MOMENTARY START

REPEAT CYCLE PULSE

All timers shown in "before start"

position. Diagrams shown with power

off unless otherwise marked. Maximum

load current through any load carrying

contact is 5 amperes. Pilot lights leads

are brought out to terminal block. Pilot

light can be wired to show practically

any desired function timer energized,

cycle running instantaneous or delayed

switch closed. etc.

INSTANTANEOUS CONTACTS

Contacts are transferred when power

supply is energized, transferred back

as shown when de-energized.

Automatic Timing & Controls

800.727.5646

atcdiversified.com