HEIDENHAIN TNC 122 Technical Manual - Manual (Page 14)

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TNC 122 8 Pin Layout 13
X41 TNC 122 Connection-assignment TNC 121
continued Contact Contact
34 O14 M04 right spindle ON/ M05 OFF or High=M16/
Low=M17
35 O12 M08 coolant ON/ M09 OFF
36 O10 High=M22/ Low=M23 or M09
37 O8 High= M26/ Low=M27
38 O6 High=M32/ Low= M33
39 24 V for neg. traverse direction output 12
40 24 V for rapid traverse output 10
41 24 V for Z axis enable output 17
42 24 V for Y axis enable output 19
43 24 V for X axis enable output 21
44 24 V for “manual“ / “not manual“ output 15
45 “Not manual” output (inverted O0) 14
46 not assigned
47 Feed rate override 0 V 3
48 Feed rate override 15 V 5
The assignments are in accordance with the PLC Standard Program Id. Nr. 277 938 13!
The 24 Vdc power supply is monitored for reverse polarity and overvoltage. Reverse
polarity blows a fuse (F 2.0 A). Overvoltage above 47 V destroys the damping diode and
blows the fuse. Maximum current load is 300 mA.
PLC outputs: Inductive loads are permitted only with anti-surge diode!
Change of the I/O assignment only if Program 205 430 is active:
With the M functions M02 an M30 the output is switched to zero. Through the M function M36 the
output O5 is switched to 1 and is used to start the erosion process. Through input I2 the function
M36 is acknowledged and indicates that erosion has ended. In this case the feed-rate potentiometer
is without function.