HEIDENHAIN iTNC 530 HSCI - Page 253

18 – 254 HEIDENHAIN Service Manual iTNC 530 HSCI
Fuses in the
PSL 135
Photo: Position of the fuses in the PSL 135
Mounting the
PSL 135
DANGER
Danger of electrical shock!
A switching power supply is located in the PSL 135. This switching power supply may still be
under voltage although separated from the power source. (Without consumer, the voltage on
the board only reduces very slowly.)
Therefore, do not touch the board or the fuses with bare hands!
Use insulated pincers, if you intend to remove the fuses!
Attention
Be careful not to touch any components on the power supply board sensitive to electrostatic
discharge and observe the ESD regulations!
Attention
Use only original replacement fuses.
DANGER
Do not confuse the leads for the +24 V NC and +24 V PLC supply voltages!
Restore the ground connections by means of lines and/or conductor bars!