Preliminary Device Description HG G-19600ZA | English, Revision 02 | Date: 13.03.2018
9
Introduction – Chapter 2
Figure 2
Three detection systems for the recognition of junctions
Five LEDs show the operational state (PWR), error state (ERR) and a detected track under-
neath the independent systems (TR1, TR2, TR3).
Via two analog outputs the deviation from the track and the actual level of the magnetic
field are output. Additionally a detect signal is generated when a magnetic tape is detected
underneath the sensor.
The detection range depends on the mounting height of the sensor and the type of the mag-
netic tape. As shown in Figure 1 above the sensor detects the deviation X from the center
of the track by measuring the horizontal magnetic flux density. The higher the deviation the
higher the output analog voltage.
Figure 3 shows the signals of the outputs (AOUT 1, AOUT 2, Detect) when moving the sen-
sor in X direction above the magnetic tape (crosswise to the direction of travel).
Figure 3
Voltage curves of the analog outputs (idealized diagram)
1
1
2
2
3
3
Magnet sensor with three
Magnetic tape
track with junction
detection systems for the recognition
of junctions
(there may only ever be max. two
tracks simultaneously underneath the
magnet sensor)
‐10
10
‐80 ‐75 ‐70 ‐65 ‐60 ‐55 ‐50 ‐45 ‐40 ‐35 ‐30 ‐25 ‐20 ‐15 ‐10 ‐5
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
AOUT1(X)
AOUT2(Z)
Detect
Detect switches
to +24 VDC
V
o
lt
ag
e c
u
rv
es
A
O
U
T
1
and
A
O
U
T
2
[
V
D
C
]
Deviation of the
sensor from the
center of the
magnetic tape
[mm]
