Datasheet > SM2A312CV2

SM2A312CV2

更新时间： 2022-10-12 13:32:10

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邦纳 - BANNER		/
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8页	549K
描述
AC Voltage Series Sensor

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数据手册

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SM2A312CV2 数据手册

MINI-BEAM AC Voltage Series Sensor

Opposed Mode Alignment

“Flooding” occurs when a portion of the sensing beam passes around

the object to be sensed. “Burn-through” occurs when a portion of the

emitter’s light energy passes through a thin or translucent object, and is

sensed by the receiver.

To correct either problem, do one or more of the following to reduce the

light energy:

•

Reduce the Gain adjustment on the receiver

•

Add an aperture to one or both lenses (MINI-BEAM apertures,

available from Banner, ﬁt neatly inside the lens assembly)

Intentionally misalign the emitter and receiver

Emitter

Object

•

Note:

•

Light condition: sensor output is ON

when there is no object in the beam

Dark condition: sensor output is ON

when there is an object in the beam

•

Receiver

Diffuse Mode Alignment

If the Alignment LED does not go OFF when the object is removed from

the beam, the sensor is probably detecting light reﬂected from some

background object. To remedy this problem:

•

Reduce the reﬂectivity of the background by painting the

surface(s) ﬂat-black, scufﬁng any shiny surface, or drilling a large

hole, directly opposite the diffuse sensor

Move the sensor closer to the object to be detected and reduce

the Gain adjustment. Rule of thumb for diffuse sensing: The

distance to the nearest background object should be at least

three times the sensing distance

Object

•

Note:

•

Light condition: sensor output is ON

when there is no object in the beam

Dark condition: sensor output is ON

when there is an object in the beam

•

Retroreﬂective Mode Alignment

A highly reﬂective object may reﬂect enough light back to a

retroreﬂective sensor to allow that object to slip through the beam,

without being detected. This problem is called “proxing,” and the

following methods may be used to correct it:

Retro

arget

•

Position the sensor and retro target so the beam will not strike a

shiny surface perpendicular to the sensor lens

Reduce the Gain adjustment

•

Add a polarizing ﬁlter (for model SM2A312LV)

Note:

•

Light condition: sensor output is ON

when there is no object in the beam

Dark condition: sensor output is ON

when there is an object in the beam

•

P/N 69942 Rev. F

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