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 dam-
ages to the control unit.
The contacts for 'CNC Ready' and 'Power OK' are available on
connector X19 (see
Ä
Chapter 5.4 “Wiring for machine safety”
on page 81).
– When an external 5V power supply (RMS) is nec-
essary 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 EL CNC control unit
Safety
24.09.2015 | 19
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