Buffer battery, 3 buffer battery – HEIDENHAIN TNC 306 Technical Manual User Manual
Page 36
3/99
TNC 416/TNC 406/TNC 306
Power supply
3–21
4.1.3 Buffer battery
The buffer battery is the voltage source for the RAM memory for NC-programs, PLC-programs
and machine parameters when the control is switched off.
If the message "EXCHANGE BUFFER BATTERY" appears, the batteries must be exchanged.
The 3 batteries may be found behind a screw cap in the power supply section of the logic unit.
As well as the batteries, the logic unit contains an additional energy store, mounted on the
processor board, for buffering the memory contents.
This means that the mains can be switched off when replacing the batteries. The energy
store will ensure that the memory is retained while the batteries are exchanged.
LE 416
Battery type:
Three AA-size batteries, leak-proof
IEC designation: LR6
LE 406/LE306
Battery type:
Three AA-size batteries, leak-proof
IEC designation: LR6
Danger of electrical shock!
Power of before opening the housing.