232 HEIDENHAIN Technical Manual MANUALplus 620
X6: Single-channel 
PLC outputs (at the 
top)
Connections at the top of the UxC 11x:
 23 single-channel PLC outputs
O0 to O22
Terminal Signal designation Assignm. / Function
1a O4 24 V outputs, can be switched off via 
terminal X4.3a (+24 V PLC.03)
2a O5
3a O6
4a O7
5a O12 24 V outputs, can be switched off via 
terminal X4.2a (+24 V PLC.02)
6a O13
7a O14
8a O15
9a O20 24 V outputs, cannot be switched off
10a O21
11a O22
12a MC.RDY 24 V output 
Control-is-ready signal
1b O0 24 V outputs, can be switched off via 
terminal X4.3a (+24 V PLC.03)
2b O1
3b O2
4b O3
5b O8 24 V outputs, can be switched off via 
terminal X4.2a (+24 V PLC.02)
6b O9
7b O10
8b O11
9b O16 24 V outputs, cannot be switched off
10b O17
11b O18
12b O19
Each output of the UxC 11x can be loaded with a maximum current of 
150 mA.
If the integrated PLC outputs do not suffice for your application, you can 
connect up to 7 additional external PL 61xx expansion PLs to the UxC 11x 
via the HSCI interface.