Safety Information: Danger - Siemens Hicom 100 E Service Manual

Important Information
Safety information
1.1.1

Safety information: Danger

Do not open the power supply. The device may only repaired by authorized personnel.
Opening the device and tampering with it can endanger your life.
Before applying power to the system or connecting extensions, ensure that the system is
correctly carthed.
Never operate the equipment with protective earthing conductor disconnected!
Voltages above 30 V AC (alternating current) or 60 V DC (direct current) are dangerous.
If the power cable appears to be damaged, replace it immediately.
Immediately replace any damaged safety equipment (covers, labels and protective cables).
If the maintenance work requires the power supply of the system to be shut down:
– Use the shut-off switch to disconnect the system from the power supply circuit, and se-
cure the shut-off device mechanically so that it cannot be used by other persons.
– Affix the information "DO NOT OPERATE" to the disconnect device.
A disconnect device can be a shut-off switch (main switch) or protective switch (fuse/
automatic cut out).
– Before starting any work on the installation, establish the location of the disconnect de-
vice.
If you are performing work on circuits with hazardous voltages, always work together with
a partner who is familiar with the location of the switch for the power supply.
Always ensure adequate insulation when touching powered circuits.
Ensure that the installation is not powered by an additional power supply, or that it is pro-
tected via an additional fuse or an additional main switch.
Before starting any work, check whether the corresponding circuits are still on power. Nev-
er take it for granted that all circuits have reliably been disconnected from the power supply
when a fuse or a main switch has been switched off.
During a thunderstorm, you should not connect or remove telephone lines and PCB
boards.
Expect to encounter leakage current from the telecommunication network.
Ensure that, whenever work is carried out on an open installation, the installation is never
left unsupervised.
1-2
A31003-K16-X001-3-7620
Hicom 100 E Version 2.1, Service manual
,
07/99