E3C

E3C

17

E3C-C ON-Delay Timing Chart

E3C-C One-Shot Timing Chart

E3C-C OFF-Delay Timing Chart

s E3C-JB4P, E3C-JC4P AMPLIFIERS

Timing Charts

Light-ON

Light beam

Incident

Interrupted

LIGHT

ON

indicator

OFF

Transistor Output

ON

(1 ms)

OFF

Transistor Output

ON

(40 ms OFF-delay)

OFF

Dark-ON

Light beam

Incident

Interrupted

LIGHT

ON

indicator

OFF

Transistor Output

ON

(1 ms)

OFF

Transistor Output

ON

(40 ms OFF-delay)

OFF

Light-ON/

Dark-ON

operation

selector

switch

Sensitivity

adjuster

OFF-delay

selector

switch

Stability

indicator

(green LED)

Light

incident

(red LED)

The alarm output operates when the control output approaches

critical OFF or ON state for more than 300 ms. An unstable

state occurs when the amount of light incident upon the

receiving element is within 20% of the amount of light needed

to change the control output state.

The alarm output feature is designed to indicate gradual

changes in sensor/reflector position, atmosphere, temperature

or ambient light which result in an unstable control output. A

change occurring less than 300 ms will not cause the alarm

output to operate.

A 300 ms time delay is built into the alarm output circuit. This

prevents false triggering of the alarm output as the leading and

trailing edges of the object to be detected are sensed. The

time can be extended by using an ON-delay timer in the circuit.

Alarm Output Timing Chart

On

Off

On

Off

300 ms max.

300 ms max.

Operation level 120%

Operation level

Operation level 80%

Control output

(light on mode)

Self-diagnostic

output

Timing Charts