H3FA-B-DC12 Datasheet, PDF (6/10 Pages) Omron Electronics LLC – DIP Model Timer for PC Board Use Provides Contact and Solid-state Output

H3FA-AU, H3FA-BU, H3FA-SAU, H3FA-SBU
H3FA
One-shot Output Operation
Turn ON the power and apply a start input (short terminals 6 and 1).
(Power turns ON when power terminals 1 and 24 are shorted or
when terminals 13 and 15 are shorted when using a 12/24 V DC-
operated model with a 12 V DC power supply.) An output is produced
immediately and is reset when the set time has elapsed.
If the reset input is applied (short terminals 4 and 1) with no start
input (open terminals 6 and 1) while the Timer is operating, the Timer
stops operating and the output is reset.
When operating with an external start or reset input, the current flow
from terminal 6 to terminal 1 (start input) or from terminal 4 to
terminal 1 (reset input) is approximately 0.1 mA. A highly reliable
contact is therefore recommended for the start and reset inputs.
Use an I_CEO of 10 μA and a V_CE (sat) of 0.5 V or less for transistor
control. When connecting an external resistor to the Timer, connect it
between terminals 21 and 23, and open terminals 21 and 22.
Power supply
(terminals 1 and 24)
ON
(See note 1.)
Start input
(terminals 1 and 6)
Reset input
(terminals 1 and 4)
Short Open
(See
note 2.)
10 ms
min.
10 ms
min.
SPST-NO contact output
(terminals 13 and 16)
Solid-state output
(terminals 1 and 10)
T
T
T
t1
SPST-NC contact output
(terminals 9 and 12)
Note: 1. When using a 12/24 V DC-operated model with a 12 V DC
power supply, short terminals 13 and 15.
2. The start input is disabled during the time limit.
3. T denotes the set time. t₁ < T
Contact Output (Top view)
OFF-delay Operation
Turn ON the power and apply a start input (short terminals 6 and 1).
(Power turns ON when power terminals 1 and 24 are shorted or
when terminals 13 and 15 are shorted when using a 12/24 V DC-
operated model with a 12 V DC power supply.) An output is produced
immediately. If the start input is applied constantly, however, the reset
input can be applied until the set time elapses to stop time-limit
operation. (An output is produced when the start input is applied
even when the constant reset input is ON prior to the start input.)
The time-limit operation starts when the reset input terminals are
opened, and the output is reset when the set time has elapsed.
When operating with an external start or reset input, the current flow
is approximately 0.1 mA. A highly reliable contact is therefore
recommended for the start and reset inputs. Use an I_CEO of 10 μA
and a V_CE (sat) of 0.5 V or less for transistor control.
Power supply
(terminals 1 and 24)
ON
(See note 1.)
Start input
(terminals 1 and 6)
Reset input
(terminals 1 and 4)
Short Open
SPST-NO contact output
(terminals 13 and 16)
Solid-state output
(terminals 1 and 10)
T
t1
T
t2 ^T
t3
SPST-NC contact output
(terminals 9 and 12)
Note: 1. When using a 12/24 V DC-operated model with a 12 V DC
power supply, short terminals 13 and 15.
2. T denotes the set time. t₁, t₂, and t₃ < T
Contact Output (Top view)
Contact output
(SPST-NC contact for
time-limit operation)
Solid-state Output (Top View)
When using the 12/24 V DC-operated model with a 24 V DC power
supply, open terminals 13 and 15.
Solid-state Output (Top View)
When using the 12/24 V DC-operated model with a 24 V DC power
supply, open terminals 13 and 15.
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