Measuring System Inputs For Square-Wave Signals; Connector Assignments; Connecting Cable - HEIDENHAIN TNC 415 Technical Manual

5.4 Measuring system inputs for square-wave signals

One measuring system with square-wave signals can be connected to the LE 415. Two such
systems can be connected to the LE 407. Maximum input frequency is 300 kHz.

5.4.1 Connector assignments

LE 407: X5, X6 measuring system 5, S
LE 415: X6 measuring system S
Flange socket with female connector insert (12-pin)
Pin Number Assignment
5 U
––—–
6 U
8 U
––—–
1 U
3 U
––—–
4 U
––—–
7 U
2 + 5 V (U
12 + 5 V (U
11 0 V (U
10 0 V (U
9 (contact spring) screen = housing

5.4.2 Connecting cable

Please use only HEIDENHAIN-measuring system cables, connectors and couplings.
In order to be able to connect a measuring system to the square-wave signal input of the logic unit,
the sinusoidal signal from the measuring system 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 measuring system or made as 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).
3-26 TNC 407/TNC 415/TNC 425
a1
a1
a2
a2
a0
a0
aS
)
P
)
P
)
N
)
N
5 Measuring systems 01.98