H3FA-B-DC12 Datasheet, PDF (5/10 Pages) Omron Electronics LLC – DIP Model Timer for PC Board Use Provides Contact and Solid-state Output

Operation
H3FA
■ Timing Charts and External Connections
Note: Do not apply voltage to any terminals other than the power supply terminals. Otherwise, the internal circuits may be damaged.
H3FA-A, H3FA-B, H3FA-SA, H3FA-SB
Standard Operation (ON-delay operation)
When the power is turned ON and the set time has elapsed, an
output is produced. (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.)
When connecting an external resistor to the Timer, connect it
between terminals 21 and 23, and open terminals 21 and 22. Refer
to External Resistors and Operating Time (Reference Value) on page
7. When operating with an external reset input, short terminals 1 and
4. The Timer will start operating even if reset terminals 1 and 4 are
open when the power is turned ON.
In this case, the current flow is approximately 0.1 mA. If a contact is
used for control, use a contact with high contact reliability, If a
transistor is used for control, use an I_CEO of 10 μA and a V_CE (sat) of
0.5 V or less.
Power supply
(terminals 1 and 24)
(See note.)
Reset input
(terminals 1 and 4)
ON
10 ms
min.
OFF ON
OFF
Short
Short
Open
SPST-NO contact output
(terminals 13 and 16)
Solid-state output
(terminals 1 and 10)
Set time
Set time
Set time Set time
SPST-NC contact output
(terminals 9 and 12)
Note: When using a 12/24 V DC-operated model with a 12 V DC
power supply, short terminals 13 and 15.
Contact Output (Top View)
Integration Operation
By opening the terminals connected to the internal variable resistor,
Timer operation can be interrupted to enable the Timer to perform
time integration operations. Interrupt Timer operation by opening
terminals 21 and 22 when using the internal variable resistor or
terminals 21 and 23 when using the external resistor. Timer
operation can be resumed by reconnecting the terminals.
ON
Power supply (terminals 1 and 24)
(See note.)
OFF ON
For internal variable resistor
(terminals 21 and 22)
For external resistor
(terminals 21 and 23)
Reset input
(terminals 1 and 4)
Short Open
Short
Open
10 ms
min.
Short
SPST-NO contact output
(terminals 13 and 16)
Solid-state output
(terminals 1 and 10)
T1 T2
T3 T4
Tn
SPST-NC contact output
(terminals 9 and 12)
Note: 1. Control output is provided when the set time has elapsed
(T₁ + T₂ or T₃ + T₄).
2. When using a 12/24 V DC-operated model with a 12 V DC
power supply, short terminals 13 and 15.
Contact Output (Top View)
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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