Circuitry For Reference Position; Circuitry For Front And Rear Limit Switch Magnets - Balluff BML-SB/C/E0-Q-M4-0-KA Serie Manual De Instrucciones

BML-S _ B/C/E0-Q _ _ _ -M4 _ _ - _ 0-KA _ _ /KA _ _-S284
Incremental Magnetic Linear Encoder
6
Interface (continued)
1.1.2

Circuitry for reference position

Depending on the type, the sensor transfers the following
signals:
– No reference signal
– Single, double, or fixed-periodic reference signal that is
magnetically coded in the magnetic tape
– A pole-periodic reference signal (periods = 5 mm,
reference signal width = edge distance, Figure 6-1). If
several reference signals must be transferred, an
external selection switch must be mounted at the
desired reference point signal.
Reference signals from the limit switch range
may not be evaluated.
Sensor head PLC
External selection
switch
Fig. 6-5: Reference position circuitry
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1.1.3
The permanent magnets with different poles at the end of
the measuring range are each sensed by a limit switch
sensor.
The sensors work as normally closed contacts, allowing
you to monitor cable breaks.
Fig. 6-6:
Reference signal
for the controller
Fig. 6-7:
Circuitry for front and rear limit switch
magnets
U
B
R0 R1
FLS
RLS
GND
Limit switch circuitry, R0 = R1 = pull-up resistance
(e.g. 1 k)
Rear limit switch magnets
Front limit switch magnets
Limit switch magnet signals
english
PLC
Front limit switch
magnets
Rear limit switch
magnets
15