ABB DCS 500 Series Service Manual page 7

Notes
Mains connection
EMERGENCY STOP
buttons
Intended use
DCS 500 / DCS 600 Service Manual
Notes supply information on states requiring particular attention, or
indicate that additional information is available on a specific topic.
For this purpose, the following symbols are used:
CAUTION! Cautions are designed to draw your attention to a
particular state of affairs.
Note A note contains or refers you to additional informa-
tion available on the particular topic concerned.
You can use a switch disconnector (with fuses) in the power supply
of the thyristor power converter to disconnect the electrical compo-
nents of the unit from the power supply for installation and mainte-
nance work. The type of disconnector used must be a switch dis-
connector as per EN 60947-3, Class B, so as to comply with EU
regulations, or a circuit-breaker type which switches off the load cir-
cuit by means of an auxiliary contact causing the breaker's main
contacts to open. The mains disconnector must be locked in its
"OPEN" position during any installation and maintenance work.
EMERGENCY STOP buttons must be installed at each control
desk and at all other control panels requiring an emergency stop
function. Pressing the STOP button on the CDP 31x control panel
of the thyristor power converter will neither cause an emergency
motor stop, nor will the drive be disconnected from any dangerous
potential.
To avoid unintentional operating states, or to shut the unit down in
case of any imminent danger according to the standards in the
safety instructions it is not sufficient to merely shut down the drive
via signals „RUN", „drive OFF" or „Emergency Stop" respectively
„control panel" or „PC tool".
The operating instructions cannot take into consideration every
possible case of configuration, operation or maintenance. Thus,
they mainly give such advice only, which is required by qualified
personnel for normal operation of the machines and devices in
industrial installations.
If in special cases the electrical machines and devices are intended
for use in non-industrial installations - which may require stricter
safety regulations (e.g. protection against contact by
children or similar) -, these additional safety measures for the in-
stallation must be provided by the customer during assembly.
3ADW000093R0601_DCS500B/DCS600_Service Manual_e_f
Safety Instructions
iii