sa1e-tan2c IDEC Corporation, sa1e-tan2c Datasheet - Page 4

• Manufacturer Part Number: sa1e-tan2c
• Description: Sa1e Miniature Photoelectric Switches
• Manufacturer: IDEC Corporation

4
Back Ground Suppression Type (BGS)
Sensing Range
Comparison
Background Suppression (BGS) Type
ON (incident)
Conveyor
Minimum Sensing Range
Detects object.
The sensing range can be adjusted using the control
knob on the housing.
20
40
Object
Maximum Sensing Range
Adjustable Sensing Range
OFF
(interrupt)
Preset
Built-in Amplifier Type
200
Diffuse-reflective Type
ON (incident)
Ignores background.
(mm)
ON (incident)
Ignores background by
Principle of the BGS Type
The principle of triangulation is utilized.
The position of a light-receiving spot depends on the
distance between the photoelectric switch and the
object. The receiving element consists of
dual-element photodiode. ON/OFF status is
determined by comparing the amount of light
received by the photo diodes (A>B: ON, A<B: OFF).
By adjusting the sensing range, the background
suppression sensor ignores the background of the
object, such as conveyors.
Sensing range can be set by moving the light-
receiving lens vertically using the control knob.
The light-receiving spot moves along with the light
receiving lens. Slide up the light-receiving lens for
longer sensing range, and slide down for a shorter
sensing range.
Dual-
element
photodiode
Dual-
element
photodiode
Dual-
element
photodiode
Red LED
Red LED
Red LED
A
B
A
B
A
B
Because a photoelectric switch of diffused
reflective type determines ON/OFF status
with the amount of light, the switch may turn
ON by detecting the background, such as a
conveyor.
The background suppression type depends
on the distance to determine ON/OFF status
and therefore detects the object only,
ignoring the background.
Light-receiving
lens
Light-projecting
lens
Light-receiving
lens
Light-projecting
lens
Light-receiving
lens
Light-projecting
lens
20mm
20mm
Sensing
Range
Sensing Range
ON
Preset
Object
Preset
ON
(07/03/06)
Preset
Object
OFF
Object