Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
2.5 MCI board extension external variation (SW 02.01 and higher)
With switch S1 you can select the type of handwheel that is to be operated on
– Differential handwheels:
Switch S1 closed (as-delivered state)
– TTL handwheel:
Switch S1 open.
Differential or TTL handwheels can only be operated alternately.
Switch position open
Fig. 2-14 Switch S1 switch position open (TTL handwheels)
You select between differential and TTL handwheels on the module using
switch S1 before installing the module.
2 Hardware Descriptions