HEIDENHAIN TNC 335 Technical Manual - Manual (Page 49)

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TNC 360 5 Encoders 3-21
5.4 Encoder inputs for square-wave signals
One encoder with square-wave signals can be connected at the input X6. Maximum input frequency
is 300 kHz.
5.4.1 Connector assignments
X6 encoder S
Flange socket with female connector insert (12-pin)
Pin Number Assignment
5 U
a1
6 U
a1
––—–
8 U
a2
1 U
a2
––—–
3 U
a0
4 U
a0
––—–
7 U
aS
––—–
2 + 5 V (U
P
)
12 + 5 V (U
P
)
11 0 V (U
N
)
10 0 V (U
N
)
9 (contact spring) screen = housing
The interface complies with the recommendations in VDE 0160, 5. 88 for separation from
line power.
5.4.2 Connecting cable
Please use only HEIDENHAIN encoder cables, connectors and couplings.
In order to be able to connect an encoder to the square-wave signal input of the logic unit, the
sinusoidal signal from the encoder must be converted to a square-wave signal. This conversion is
performed by the interpolation and digitizing electronics (EXE). The interpolation and digitizing
electronics is either integrated into the encoder or is an independent unit.
If the interpolation and digitizing electronics does not have its own power supply, it can be supplied
from the logic unit. In order to ensure a correct supply voltage, the total length of the connecting
cable between the interpolation and digitizing electronics and the logic unit must be limited (see the
following diagram).