HEIDENHAIN TNC 335 Technical Manual - Manual (Page 76)

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TNC 360 12 Machine Control Panel 3-53
12 Machine Control Panel
A separate 37-pin female connector (X27) is mounted on the logic unit for the connection to the
manufacturer's proprietary machine control panel. This connector includes the PLC inputs I128 to
I151, the PLC outputs O0 to O7, as well as the 0 V and +24 V of the PLC power supply. The PLC
inputs I128 to I151 may be connected only with the power supply from pins 36 and 37, since this
power supply is internally secured as required.
12.1 Pin layout
X27 Machine control panel
D-sub connector (37-pin female insert)
Pin Number Assignment
1 I128
2 I129
3 I130
4 I131
5 I132
6 I133
7 I134
8 I135
9 I136
10 I137
11 I138
12 I139
13 I140
14 I141
15 I142
16 I143
17 I144
18 I145
19 I146
20 I147
21 I148
22 I149
23 I150
24 I151
25 Do not use
26 O0
27 O1
28 O2
29 O3
30 O4
31 O5
32 O6
33 O7
34, 35 0 V (PLC) 1)
36, 37 + 24 V (PLC) 2)
1) Externally available PLC reference potential for the outputs O0-O7
2) Externally available (via fuse) PLC supply voltage for the inputs.