Incremental Interface - Pilz PSEN enc sincos/HTL Operating Manual

Incremental interface

7 Incremental interface
The measuring system acquires the angular information from the connected process
via the rotation of the shaft. A pulse disk is fixed to the shaft; this acquires the angular
increments with a defined number of periods per revolution. A scanning unit with
integrated optoelectronics generates electrical signals and outputs signal periods, which
can be processed in a signal conditioner afterwards.
The resolution of the measuring system is defined by the number of light/dark segments
(pulse number per revolution) on the pulse disk. A signal sequence of e.g. 1024 periods
is output during one revolution. To evaluate the counting direction, a 2nd signal
sequence with a 90° phase offset is output for the evaluation device.
The counter of an external evaluation device can be reset with an additional zero pulse,
and the mechanics - evaluation device reference point can thus be defined.
Operating Manual PSEN enc sincos/HTL
1005022-EN-01
CAUTION!
Danger of damage to subsequent electronics due to overvoltages caused
by a missing ground reference point!
• If the ground reference point is completely missing, e.g. 0 V of the power
supply not connected, voltages equal to the supply voltage can occur at the
outputs of this interface.
➢ It must be ensured that a ground reference point is present at all times,
➢ or the system operator must provide appropriate protective
mechanisms for the subsequent electronics.
• If the input voltage exceeds 30 V, these voltages occur accordingly at the
HTL outputs. This can lead to damage of the output or input circuit of the
downstream evaluation device.
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