HEIDENHAIN IK 220 - Handbuch (Seite 74)

Hardware
74
Specification of the 1 V
PP
interface
Signal amplitudes
A, B (0°, 90°)
R (reference mark )
0.6 V
PP
to 1.2 V
PP
0.2 V to 0.85 V
Signal levels for error
message
≤
0.22 V
PP
Maximum input frequency Standard: 500 kHz,
switchable to 33 kHz
Cable length 1) Max. 60 m
1)
Cables up to 150 m are possible, if it can be guaranteed that
the encoder is supplied with 5 V from an external power
source.
In this case, the maximum input frequency is reduced to max.
250 kHz.
Specification of the EnDat 2.1 interface
The EnDat 2.1 interface of the absolute encoders is bidirectional.
It supplies the position values and makes it possible to read
from or write to the encoder’s memory. Sinusoidal voltage
signals (1 Vpp) are available as a complement.
Cable length: max. 10 m
max. 50 m
2)
2)
With genuine HEIDENHAIN cables. Ensure that the power
supply limits for the encoder are not exceeded.