SM912LV BANNER ENGINEERING, SM912LV Datasheet - Page 12

• Manufacturer Part Number: SM912LV
• Description: Photoelectric Sensor
• Manufacturer: BANNER ENGINEERING

Specifications of SM912LV

• Output Current: 250mA
• Sensor Output: NPN/PNP
• Supply Voltage Range Dc: 10V To 30V
• Sensing Range Max: 9m
• Sensor Housing: Rectangular
• Switch Terminals: Cable
• Sensor Input: Optical
• Sensing Mode: Retroreflective

12
VALU-BEAM 915 Series Sensors
Application Note:
Relative Reflectivity of Materials
The amount of light that is returned to reflective mode sensors (diffuse,
convergent, and divergent types) is dramatically influenced by the reflectivity
of the surface being sensed. Excess gain curves are plotted using a white test
card, rated at 90% reflectance. Any other material surface may be ranked for
its reflectivity as compared against this 90% reflectance white test card:
MATERIAL
Kodak white test card
White paper
Newspaper with print
Tissue paper: 2 ply
Kraft paper cardboard
Beer foam
CONVERGENT Mode
Sensing Mode
DIFFUSE Mode
1 ply
REFLECTIVITY
OBJECT
OBJECT
90%
80%
55%
47%
35%
70%
70%
EXCESS GAIN REQUIRED
SMW915DSR
Voltage: 12 to 28V ac/dc
SMA915DSR
Voltage: 90 to 130V ac
SMB915DSR
Voltage: 210 to 250V ac
Range: 15 inches (38cm)
Response: 20ms on/off
Beam: infrared, 880nm
SMW915D
Voltage: 12 to 28V ac/dc
SMA915D
Voltage: 90 to 130V ac
SMB915D
Voltage: 210 to 250V ac
Range: 30 inches (76cm)
Response: 20ms on/off
Beam: infrared, 880nm
SMW915CV
Voltage: 12 to 28V ac/dc
SMA915CV
Voltage: 90 to 130V ac
SMB915CV
Voltage: 210 to 250V ac
Focus at 1.5" (38mm)
Response: 20ms on/off
Beam: visible red, 650nm
Models
1
1.1
1.6
1.9
2.6
1.3
1.3
These sensors operate by detecting the reflection of their own light from
the object being sensed, and therefore require no special reflectors. They
are ideal for use when the reflectivity and profile of the object are sufficient
to return a large amount of emitted light back to the sensor. Choose "DSR"
models for best response to objects at close range.
VALU-BEAM convergent sensors produce a precise .06" diameter sens-
ing spot at a focus point 1.5" in front of the sensor lens. Due to their very
narrow depth of field, they excel at detecting small objects only a fraction
of an inch away from backgrounds. A visible red sensing beam simplifies
alignment.
*NOTE: for materials with shiny or glossy surfaces, the reflectivity figure represents the
maximum light return, with the sensor beam exactly perpendicular to the material surface.
E
X
C
E
S
S
G
A
I
N
Dimension lumber (pine,
clean, dry)
Rough wood pallet
(clean)
*Clear plastic
*Opaque white plastic
*Opaque black plastic
Black neoprene
Black rubber tire wall
*Aluminum, unfinished
*Aluminum, black
anodized
*Stainless steel,
microfinish
E
X
C
E
S
S
G
A
I
N
E
X
C
E
S
S
G
A
I
N
I
I
I
1000
1000
1000
MATERIAL
100
100
100
10
10
10
.1 IN
.1 IN
.1 IN
1
1
1
Excess Gain
SMW915CV,
SMA915CV,
SMB915CV
SMW915D, SMA915D,
SMB915D
SMW915DSR,
SMA915DSR,
SMB915DSR
(Range based on 90%
reflectance white test card)
1 IN
1 IN
1 IN
Range base on 90%
reflectance white test card
DISTANCE
DISTANCE
DISTANCE
(Range based on 90%
reflectance white test
card)
10 IN
10 IN
10 IN
REFLECTIVITY
100 IN
100 IN
100 IN
75%
20%
40%
87%
14%
4%
1.5%
140%
115%
400%
I
N
C
H
E
S
I
N
C
H
E
S
I
N
C
H
E
S
.75
.50
.25
.25
.50
.75
.75
.50
.25
.25
.50
.75
.09
.06
.03
.03
.06
.09
DISTANCE TO 90% WHITE TEST CARD--INCHES
DISTANCE TO 90% WHITE TEST CARD--INCHES
DISTANCE TO 90% WHITE TEST CARD--INCHES
0
0
0
0
0
0
Beam Pattern
EXCESS GAIN REQUIRED
SMW915CV, SMA915CV,
SMB915CV
6
3
.5
SMW915DSR,
SMA915DSR,
SMB915DSR
SMW915D,
SMA915D,
SMB915D
1.0
12
6
1.2
4.5
2.3
1.0
6.4
22.5
60
0.6
0.8
0.2
1.5
18
9
2.0
24
12
30
2.5
15