Hans Turck GmbH & Co.KG • Postfach • D-45466 Mülheim an der Ruhr • Telefon 02 08/49 52-0 • Telefax 02 08/49 52-264
Subject to change without notice • © Hans Turck GmbH & Co.KG 2002 • Edition: • 12.04.2004
Subject to change without notice • © Hans Turck GmbH & Co.KG 2002 • Edition:
Hans Turck GmbH & Co.KG • Postfach • D-45466 Mülheim an der Ruhr • Telefon 02 08/49 52-0 • Telefax 02 08/49 52-264
Photoelectric sensor
retro-reflective sensor
SM312LP
●compact housing style
●Reverse polarity and short-circuit
protection
●cable, 2 m
●light/dark operate
●sensitivity adjustable via potentio-
meter
●alignment indication
Wiring diagram
With retro-reflective sensors, emitter and
receiver are incorporated in one compact
housing. The light beam of the emitter is di-
rected towards a reflector which returns
the light back to the receiver. An object is
detected when it interrupts this beam. Re-
tro-reflective sensors incorporate some of
the advantages of opposed mode sensors
(good contrast and high excess gain). Fur-
ther it is merely required to install and wire
a single device. The smaller sensing range
and susceptibility to interference through
shiny objects when using devices without
polarisation filter can be disadvantageous
in some applications.
Excess gain curve
Excess gain in relation to the distance
BN (1)
WH (2)
BK (4)
BU (3)
+
LP
LV
100
10
1
0,01 0,1 1 10 m
Type SM312LP
Ident-No. 3049769
Operating mode Retro-reflective sensor with polarising filter
Type of light red
Wave length 650 nm
Max. sensing range [m] 0... 3 m
Operating temperature -20 ...+ 70 °C
Rated operational voltage (DC) UB10... 30 VDC
Rated operational current (DC) Ie≤ 150 mA
No-load current I0≤ 25 mA
Short-circuit protection yes, cyclic
Reverse polarity protection yes
Output function normally open, PNP/NPN
Switching frequency ≤ 500 Hz
Max. switch-on delay ≤ 100 ms
Overload trip point >220 mA
Housing style rectangular; Mini Beam
Dimensions 53,3 x 12,3 x 30,7 mm
Housing material plastic, PBT
Lens Kunststoff, Acryl
Wiring cable
Cable length 2 m
Cable cross section 4 x 0,5 mm2
Degree of protection IP67
Switching status indication LED red
Excess gain indication LED red flashing
LED RD
26
ø 3
8
M18 x 1
24,1
30,7
12,3
53,3
24/8
Pot.
