SME11 - SME21 - SME51
4 Electrical connections
M12
Colour
Function
1
Black
0VDC
2
Red
+VDC
*
3
Yellow
A
4
Blue
/A
5
Green
B
6
Orange
/B
7
White
0
8
Grey
/0
Case
Shield
Shielding
*
see ordering code
Example
SME51-L-1-… +VDC = +5VDC ± 5%
SME51-Y-2-… +VDC = +10VDC +30VDC
NOTE
All sensors can provide inverted signals.
A = A signal;
/A = inverted A signal (or
complementary signal).
All our magnetic sensors can provide A, /A, B, /B, 0, /
0 output signals. We advise the inverted signals
always be connected if the receiving device will
accept them. Otherwise each output should be
insulated singularly.
WARNING
Connecting /A, /B, or /0 together, to
+VDC or 0VDC may cause permanent
damage to the sensor.
M12 8-pin connector
male, frontal side
A coding
4.1 Cable specifications
Type
: LIKA HI-FLEX M8
Wires
: 6 x 0.14 mm
2
+ 2 x 0.22 mm
2
Shield
: Tinned copper braid
External Ø : Ø 5.3 ÷ 5.6 mm
Impedance : 6 x 148
Ω
/Km, 2 x 90
Ω
/Km
The total length of the cable connecting the sensor
and the receiving device should not exceed 50 m (55
Yd). Should greater distances to be reached please
contact Lika Electronic Technical Dept.
4.2 GND connections
Minimize noise by connecting the shield (or the
connector housing) and the sensor to ground. Make
sure that ground is not affected by noise.
4.3 Diagnostic LEDs
LED
Description
E (blinking
red)
Error 1: tolerance gap between sensor
and scale not respected (pulse error);
Error 2: travelling speed too high
(frequency error).
R (lit green)
Reference: zero signal
1 and 2
Not used
5 Output signals
As the sensor moves along the magnetic scale, it
detects the displacement and issues an output
signal equivalent to the one of an incremental
encoder or a linear scale.
The frequency of the output signal is proportional to
the measuring speed and the displacement of the
sensor.
Resolution after quadrature (4 edges reading) can
be determined by the ordering code of the sensor.
5.1 Index “I”
With ordering
code “N” the
output signal "I"
is not available.
MAN SMEx1 I_E 1.4.odt
7
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