X21 = plc output x22 = plc input – HEIDENHAIN TNC 306 Service Manual User Manual
Page 22
SERVICE MANUAL TNC 306/360
Page 18
HEIDENHAIN Service
Flange socket with female insert (37-pin)
Flange socket with female insert (37-pin)
Pin No.
Assignment
Pin No.
Assignment
1
O0
1
I0
2
O1
2
I1
3
O2
3
I2
4
O3
4
I3 acknowledgement for test
5
O4
"Control Ready for Operation"
6
O5
5
I4
7
O6
6
I5
8
O7
7
I6
9
O8
8
I7
10
O7
9
I8
11
O10
10
I9
12
O11
11
I10
13
O12
12
I11
14
O13
13
I12
15
O14
14
I13
16
O15
15
I14
17
O16
16
I15
18
O17
17
I16
19
O18
18
I17
20
O19
19
I18
21
O20
20
I19
22
O21
21
I20
23
O22
22
I21
24
O23
23
I22
25
O242)
24
I23
26
O252)
25
I24
27
O262)
26
I25
28
O272)
27
I26
29
O282)
28
I27
30
O292)
29
I30
31
O302)
30
I29
32
do not assign
31
I30
33
0 V (PLC)1)
32
I31
34
control ready for operation2)
33,34
do not assign
35,36,37
+ 24 V_A PLC 3)
35,36,37
0V PLC1)
housing
external shield
housing
external shield
1) 0 V PLC reference potential for testing
2) Cannot be switched off with EMERGENCY STOP
3) + 24 V_A power supply for PLC testing (can be switched off)