ATC-Automatic Timing & Control 425A Series Data Sheet
DIGITAL SETTING: The 425 is set digitally by rotating each setting knob
until the desired Time Preset is displayed by the number wheels on the
front of the timer. The digital setting allows exact, accurate and repeat-
able timing cycles.
HIGH ACCURACY: The 425 utilizes a crystal controlled oscillator which
provides 0.1% timing accuracy across all rated voltages and tempera-
tures.
CYCLE PROGRESS INDICATION: The 425 offers the industry’s brightest
green LED display in a 1/16 DIN package. Depending on the Model, the
three-digit LED display will time UP to or DOWN from the Time Preset.
Through its internal micro controller, the 425 keeps track of the time
setting by monitoring each of the three Time Preset switches. When-
ever a change is made in the time preset, even during a cycle, the 425
instantly re-computes and adjusts the current timing cycle.
1/16 DIN HOUSING: The 48mm2 (1/16 DIN) housing is compact, allow-
ing the 425 to be panel mounted or plug-in using an 8-pin octal socket.
The decimal point and SEC/MIN/HRS switches are located on the side of
the unit. When panel mounted, these range switches are not accessible
to the operator. This Tamper-proof feature prevents unauthorized or
hazardous changes to the timing range.
MEMORY OPTION: The 425 can be ordered as standard with an EEPROM
memory. This allows the 425 to retain the elapse time or time remaining
during momentary or sustained power interruptions.
INSTANTANEOUS AND DELAYED RELAY VERSIONS: A version of the
425 is available with one set of SPDT instantaneous contacts and one
set of SPDT delayed contacts.
DELAYED RELAY VERSION: A version of the 425 is available with DPDT
delayed contacts.
MODEL 425A300Q10XX (SPDT INSTANTANEOUS & SPDT DELAYED
RELAYS): Timing starts when power is applied to terminals 2 and 7.
The instantaneous relay energizes, the LED digital display begins to
increment from 0 and the timing LED blinks slowly. When the preset
value is reached, the LED blinks rapidly and the Delayed SPDT relay is
energized. The timer remains in this timed-out condition until reset by
removing power.
MODEL 425A300Q20XX (DPDT DELAYED RELAY): Timing starts when
power is applied to terminals 2 and 7. The LED display begins to incre-
ment from 0 and the timing LED blinks slowly. When the preset value is
reached, the LED stops, the timing LED blinks rapidly and the Delayed
DPDT relay energizes. The timer remains in this timed-out condition until
reset by removing power.
MODEL 425A300Q10MX & MODEL 425A300Q20MX (MEMORY OP-
TION): Operation is same as above, however, units will not reset when
power is removed during the timing cycle. Timers with this option can
only be reset after time-out, or by adjusting the setting knobs to 000
during the timing cycle.
CAUTION: Be advised that the relay(s) will transfer when setting knobs
are adjusted to 000 when power is applied.
E48329
1/16 DIN LED Digital
Display Timer
• Easy-To-Read High Intensity Green LED Display
• Timing From .01 SEC to 999 Hrs in One Unit
• Switch Selectable Timing Ranges Are Tamper Proof
When Panel Mounted
• Timing LED Indicates Output Relay Status
• Time Preset Can Be Adjusted While Timing
• EEPROM memory Option Standard Feature
• Passes NEMA Showering Arc Noise Test
• Panel Mounting or 8-pin Octal Plug-in mounting
• Timing Up to or Down From the Set Point
MODEL NUMBER
MODEL NUMBER 425A 300 Q
RANGE
0 to 9.99 or 99.9 or
999 SEC,MIN,HR 300
VOLTAGE & FREQUENCY
120 VAC 50/60 Hz Q
OUTPUT ARRANGEMENT
Instantaneous Relay (SPDT),
Delay Relay (SPDT) 10
Delay Relay (DPDT) 20
MEMORY
Standard-No Memory X
With Memory (EEPROM M
FEATURES
Standard (Time Up) X
Standard (Time Down) D
Special K
ACCESSORIES 8-PIN
8-Pin surface/DIN rail socket 000-825-85-00
Hold down clips for above socket 407-025-13-00
Panel mounting bracket 405-320-02-00
Plug-in socket kit (8-pin) 319-261-45-00
8-Pin socket w/rear facing terminals 000-825-90-00
1/16 DIN TIMERS 425A Series
Automatic Timing & Controls
TYPICAL CIRCUITS
425A300Q10XX
BEFORE START
TIMING
TIMED OUT
O
O X
O = LOAD OFF
X = LOAD ON
RELAY CONTACTS
Instantaneous
Delayed
425A300Q20XX
425A300Q20XX
1/16 DIN TIMERS 425A Series
BEFORE START
TIMING
TIMED OUT
O
O X
O = LOAD OFF
X = LOAD ON
RELAY CONTACTS
Instantaneous
Delayed
1-3
1-4
8-6
8-5
1-3
1-4
8-6
8-5
Before
Start
Before
Start
During
Timing
During
Timing
End of
Cycle
End of
Cycle
SPECIFICATIONS
MODELS 425A300Q10XX ON-Delay Time Up
425A300Q20XX ON-Delay Time Up
425A300Q10XD ON-Delay Time Down
425A300Q20XD ON-Delay Time Down
RANGES Switch Selectable, 0 to 9.99,99.9 or
999 Sec/Min/Hrs
LOAD RELAY TYPE Q10 Models: SPDT,
Q20 Models: DPDT
LIFE 10 Million operations (no load)
CONTACT 5 AMPS Resistive, 1/10 HP @
RATING 120 VAC
TEMPERATURE 0° to 140°F (-18° to 60°C)
RATING
NOISE IMMUNITY Showering ARC per NEMA ICS 2-230, the 425A
will withstand a voltage surge of 4500 volts for
50 microseconds without damage
MOUNTING 8-Pin Octal plug-in base, Panel Mounting Bracket
POWER 120 VAC, 50/60 Hz;(10%,-20%); 5 WATT maximum
REQUIREMENTS
REPEAT ACCURACY ± .1% over rated voltages
RESET TIME 100 mSEC minimum
DISPLAY Cycle Progress 3 Digit Green LED Display,
seven segment numeric
Timing LED Red LED blinks slowly (once
per second) during timing; blinks
rapidly after time out.
MEMORY...MX MODELS EEPROM 100,000 read/write cycles
HOUSING 1/16 DIN (48mm x 48mm) Housing
WEIGHT 5 oz. (140 g) SHIPPING: 1 lb.
DIMENSIONS (INCHES/MILLIMETERS)
WIRING
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Automatic Timing & Controls
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