HEIDENHAIN MANUALplus 620 Technical Manual page 48

Improvements
48
Overview of changes to the UEC 11x since its introduction:
UEC 111, UEC 112
ID number Changes
625 777-01 Initial introduction
625 779-01
625 777-02 1st improvement
625 779-02
Support of motor holding brakes
New connections X344 and X394 for controlling the motor
holding brakes of axes 1 to 4. For variant 01, PLC outputs
were required for controlling the motor holding brakes.
New terminals for the axis motors
Pluggable screw terminals for the axis motors connected to
X81 to X84. In variant 01, the terminals for the motors are
permanently integrated in the unit and are not pluggable.
625 777-03 2nd improvement
625 779-03
Optimized active cooling
A new arrangement of fans in the UEC 11x has improved
the distribution of cooling air in the unit.
Changed arrangement of connection X19
Connection X19 (speed encoder of the 4th axis, only UEC
112) was shifted slightly. See drawing below.
UEC 11x, old:
HEIDENHAIN Technical Manual MANUALplus 620
UEC 11x, new: