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
emitter
SM31ELQD
●compact housing style
●Reverse polarity and short-circuit
protection
●connector M12 x 1
Wiring diagram
Opposed mode sensors consist of a sepa-
rate emitter and receiver. These are instal-
led directly opposite each other so that the
light from the emitter is aimed directly at the
receiver. When an object interrupts or wea-
kens the light beam, the sensor switches.
Opposed mode sensors are the most relia-
ble photoelectric sensors for detection of
opaque targets. An excellent contrast bet-
ween light and dark conditions and an ex-
tremly high excess gain are typical of this
sensing mode, thus allowing operation
over larger distances and under difficult
conditions.
Excess gain curve
Excess gain in relation to the distance
+
BN (1)
BU (3)
E/R EL/RL
100
10
1
0,1 1 10 100 m
Type SM31ELQD
Ident-No. 3026952
Operating mode Opposed mode (emitter)
Type of light IR
Wave length 880 nm
Max. sensing range [m] 0... 30 m
Operating temperature -20 ...+ 70 °C
Rated operational voltage (DC) UB10... 30 VDC
No-load current I0≤ 25 mA
Short-circuit protection yes, cyclic
Reverse polarity protection yes
Housing style rectangular; Mini Beam
Dimensions 71,3 x 12,3 x 30,7 mm
Housing material plastic, PBT
Lens Kunststoff, Acryl
Wiring connector, M12 x 1
Degree of protection IP67
LED RD/
Pot.
26
ø 3
8
M18 x 1
24,1
53,3
M12 x 1
30,7
18
12,3
24/8
