Buffer Battery; X23 Power Supply For Analog Inputs - HEIDENHAIN TNC 415 Technical Manual

Power supply for the PL 410 B
Connections as on the PL 410, plus power supply at X23 in accordance with VDE 0160, 5.88 low-voltage
electrical separation for analog inputs (the NC power supply can be used).

X23 Power supply for analog inputs

Connection terminals
Pin Number Assignment
1 + 24 V DC
2 0 V
Power supply for PA 110
Pin Number Assignment
1 +24 V DC Not switched off by EMERGENCY STOP
2 0 V
The power for the PA 110 can be supplied according to VDE 0550, provided that the analog inputs
and connections for the Pt 100 are shockproof according to VDE 0160 (Section 5.5.1). If this is not
possible, the entire PLC power supply and the power for the PA 110 must be provided according to
VDE 0551.

4.1.3 Buffer battery

The buffer battery is the potential source for the RAM memory for NC-programs, PLC-programs
and machine parameters when the control is switched off.
If the
"EXCHANGE BUFFER BATTERY"
message 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.
3-18 TNC 407/TNC 415/TNC 425
Type of batteries:
Three AA-size batteries, leak-proof,
IEC-Designation "LR6"
4 Power supply 01.98