power automation PA 8000 LW Series, Installation Instructions Manual, Page: 20 / 132

2.8.2 'Power ok' signal
The "Power ok" relay is triggered by the hardware monitoring of the
internal supply voltages and the temperature sensor.
The "Power ok" relay is switched off when the power supplies do not
match the allowed range or the internal temperature is too high.
n Use the contacts of the "Power ok" relay to switch off the main
power supply of the control unit to avoid any unexpected damages
to the control unit.
The contacts for 'CNC Ready' and 'Power OK' are available on con-
nector X19 (see Ä Chapter 5.5 “Wiring for machine safety”
on page 102 ).
– When an external 5V power supply (RMS) is necessary to supply
incremental measuring systems, use the corresponding entry in
the control unit's drive configuration file (
DriveCfg.ini
) to acti-
vate the monitoring of the correct range of these 5 V.
When the monitoring is activated, an error on this power supply will
cause the "Power ok" relay to drop.
2.9 Conduct in a dangerous situation and in case
of accidents
n Stay informed about locations of first aid equipment (first aid kit,
covers, etc.) and fire extinguishers at the site of installation.
n Instruct personnel about accident reporting, first aid and rescue
facilities at the site of installation.
n Disconnect power supply immediately.
n Initiate first aid measures.
n Inform responsible persons at the site.
n Call for rescue service if applicable.
Preventive Measures
In Case Of Accidents
PA 8000 LW CNC control unit
Safety
25.09.2015 | 20