Datasheet

18
LT4H
Operation mode
T: Set time t1, t2, t3, ta<T
Operation type
Power on delay (1)
Explanation Time chart
• Set the operation mode
section of the DIP switches
(no.’s 1, 2, and 3) on the
side of the timer as shown.
• Clears elapsed time value and starts time
delay at power ON.
• After timer completion, stops at the display of
the set value (addition), or stops at “0” (sub-
traction).
• Ignores start input.
• Stops delay time operation at stop ON.
Restarts delay time operation at stop OFF.
A
Power on delay (2)
A2
Signal on delay
B
Signal off delay
C
Stop
Reset
Output
Power supply
OFF
ON
OFF
ON
OFF
ON
OFF
ON
Tt1
t2
t1+t2=T
OFF
ON
OFF
ON
OFF
ON
OFF
ON
Tt1t2
t1+t2=T
Stop
Reset
Output
Power supply
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
T
t1
t2 t1+t2=T
Stop
Start
Reset
Output
Power supply
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
T
ta tb t
T>ta+tb T>t
Stop
Start
Reset
Output
Power supply
123
ON ON ON
• Set the operation mode
section of the DIP switches
(no.’s 1, 2, and 3) on the
side of the timer as shown.
• Elapsed time value does not clear at power
ON. (power outage countermeasure function)
• The output remains ON even after the power
is cut and restarted.
• After timer completion, stops at the display of
the set value (addition), or stops at “0” (sub-
traction).
• Ignores start input.
• Stops delay time operation at stop ON.
Restarts delay time operation at stop OFF.
123
OFF OFF OFF
• Set the operation mode
section of the DIP switches
(no.’s 1, 2, and 3) on the
side of the timer as shown.
• Clears elapsed time value at power ON.
• Time delay starts at start ON and elapsed
time value or output resets at start OFF.
• Instantaneous time delay start at reset OFF
and power ON while start is ON.
• Stops delay time operation at stop ON.
Restarts delay time operation at stop OFF.
• In order to have the time delay start at power
ON or reset at power OFF, short out the start
input beforehand.
123
ON OFF OFF
• Set the operation mode
section of the DIP switches
(no.’s 1, 2, and 3) on the
side of the timer as shown.
• Clears elapsed time value at power ON.
• Output control ON at start ON and time delay
start at start OFF.
• Elapsed time value clears when start goes ON
again during time delay.
• Stops delay time operation at stop ON.
Restarts delay time operation at stop OFF.
123
OFF ON OFF
Notes: 1) Each signal input (start, reset, stop, and lock) is applied by shorting their input terminal to the common terminal (terminal Q for the 8-pin type, terminal E for
the 11-pin type, and terminal for the screw terminal type).
2) The 8-pin type does not have a stop input or lock input.
Digital
Timers
09/2009