N-38
LE4S Series
Proper Usage
Main circuit
(Figure 1)
< Sensor >
Power
Rectication
circuit
Isolation
transformer
<External sensor
power supply>
START
RESET
INHIBIT
● Follow instructions in 'Proper Usage'. Otherwise, it may cause unexpected accidents.
● When supplying or turning o the power, use a switch or etc. to avoid chattering.
● Install a power switch or circuit breaker in the easily accessible place for supplying or disconnecting the power.
● In order to block peripheral current, use isolation transformer which of secondary part is not grounded as (Figure 1) to
supply power to the external input device.
● Do not connect two or more timers with only one input contact or transistor simultaneously.
● Keep away from high voltage lines or power lines to prevent inductive noise.
In case installing power line and input signal line closely, use line lter or varistor at power line and shielded wire at input
signal line.
Do not use near the equipment which generates strong magnetic force or high frequency noise.
● This unit may be used in the following environments.
①
Indoors (in the environment condition rated in 'Specications')
②
Altitude max. 2,000m
③
Pollution degree 2
④
Installation category II
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