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Installation Instructions
PHOTOSWITCHr Bulletin 45LST Optical Fork Sensor
IMPORTANT: SAVE THESE INSTRUCTIONS FOR FUTURE USE.
Description
The 45LST optical fork sensor is designed for small part
detection on machines and conveyors. With available slot
widths from 2mm to 225mm (0.08in to 8.86in), these sensors
feature adjustable sensitivity and selectable NPN/PNP with
LO/DO energized output in a heavy-duty IP65 aluminum
housing. Applications include label detection on clear
substrates, cap detection on bottles, and part sensing on
conveyers for the packaging and material handling industries.
The 45LST sensors are also ideal for the automotive, paper,
and food industries.
The 45LST optical fork sensor maintains all ratings that are
necessary for all applicable industries today: IP65, cULus and
CE marked for all applicable directives.
Features
S 10 to 30V DC operation
S Fast 30µsec response time
S NPN/PNP output
S IP65 Housing
S Industrial aluminum housing
S cULus listed and CE marked for all applicable directives
User Interface
Green LED = Power ON/
Unblocked light path
Red & Green LED blink =
Short circuit mode
Red LED = Output energized
Specifications
Approvals UL, cULus and CE marked for all applicable
Sensing Beam Pulsed (modulated) or nonpulsed (continuous) IR
Sensing Gap 2mm (0.08in) to 225mm (8.86in)
Supply Voltage 10-30V DC
Current Consumption 30mA maximum (45LST-1LEA1-P4 = 40mA)
Circuitry Protection Reverse polarity, transient, overload, short circuit
Output Configuration NPN (current sinking) or PNP (current sourcing)
Output Rating 100mA (NPN or PNP)
Response Time 30 microseconds or 1 millisecond
Adjustments Sensitivity (25 turn adjustable screw)
Housing Material Anodized aluminum
Environmental Ratings IP65
Connections 4Ćpin DC pico (M8) connector
Operating Temperature
Leakage Current 12V Supply: 0.78mA @ 10mA load, 6.9mA @
PowerĆon Delay 129ms
directives
protection
Light Operate: Normally open circuits that conduct
with target present
Dark Operate: Normally closed circuits that
conduct with target absent
-20_C to +60_C (-4_F to 140_F)
100mA load
24V Supply: 0.30mA @ 10mA load, 3.0mA @
100mA load
Sensitivity Adjustment LEDs
Sensor Setup
Initial setup includes mounting the sensor securely and then
providing power through a 4-pin pico cordset. The initial
factory settings have the threshold on the sensor preset so
that most opaque objects may be sensed. To adjust sensitivity
turn adjustment screw clockwise to increase or
counterclockwise to decrease.
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Wiring Diagrams
NPN (Light Operate)
3
2
4
1
Blue
White
Black
Brown
Load
PNP (Light Operate)
+
Ê
–
+
–
Brown
1
White
2
Black
4
3
Load
Blue
+
Ê
–
Pico
24
13
NPN (Dark Operate)
Brown
1
White
2
Black
4
Blue
3
Ê White Wire not used.
Dimensions—mm (inches)
M8 Plug
Sensitivity Adjustment
4 (0.16)
R = 2.2
20 (0.79)
233
(9.17)
Fork Size A B C D
2 to 120
(0.08 to 4.72)
225 (8.86) 225 (8.86) 60 (2.36) Ċ Ċ
PNP (Dark Operate)
Blue
Load
+
Ê
–
+
–
3
White
2
Black
4
1
Load
Brown
+
Ê
–
225mm 2mm to 120mm
20
(0.79)
(0.77)
19.5
16
(0.63)
80 (3.15)
68 (2.68)
B
Optical
Axis
LEDs
12 (0.47)
15
(0.59)
A
22.5
(0.88)
6
(0.24)
Sensitivity Adjustment
5 (0.20)
4.2 (0.16) Dia.
2 Places
D
C
20 (0.79) + B
15
(0.59)
B
Optical
Axis
LEDs
6
(0.24)
12 (0.47)
12.25 (0.48)
A
22.75
(0.89)
Dimensions—mm (inches)
2 (0.08) 40 (1.57) 14 (0.55) 6.25 (0.25)
15 (0.59) 40 (1.57) 27 (1.06) 6.25 (0.25)
30 (1.18) 40 (1.57) 42 (1.65) 6.25 (0.25)
50 (1.97) 57 (2.24) 40 (1.57) 17.25 (0.68)
80 (3.15) 57 (2.24) 70 (2.75) 17.25 (0.68)
120 (4.72) 57 (2.24) 110 (4.33) 17.25 (0.68)
Pico
24
13
Accessories
Description Catalog Number
2m (6.5ft) pico QD Cordset 889P-F4AB-2
PHOTOSWITCHR is a registered trademark of
Rockwell Automation.
Publication 75009–204–01(A)
2
June 2003
Printed in USA