Agilent Technologies BioCel 1200, Руководство пользователя

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29 Chapter 2: BioCel overview
BioCel User Guide
Emergency stop and
interlocks
An electrical line from the pre-emergency stop block enters the
emergency stop relay which controls the emergency stop circuit. One
output from the emergency stop relay powers an interlock circuit switch.
Another output supplies the BioCel power strips from which most of the
BioCel devices and system components receive current (exceptions to
this are the VPrep, VPrep pumps, Ethernet hub, and clean-room intake
and recirculation fans). These devices and system components are all
wired after the emergency stop and therefore receive no current when
an emergency stop is activated. This includes the Bio I/O and cooling
fans, which use DC electricity produced by the system DC power supply.
If an emergency stop is activated, the reset button must be pushed to
reset the emergency stop relay to a position that allows current to flow.
The door interlock system is fed AC electricity from the emergency stop
relay. If an overhead door is opened during a run, the interlock switch
cuts power to the enable wires that lead to the robot, VPrep, VPrep
pumps, and clean-room intake and recirculation fans. This stops the
robot and VPrep motors and turns on their respective
z -axis brakes. The
brakes make sure that the VPrep head and robot do not drop, preventing
damage and eliminating a crushing hazard.
The interlock switch is bypassed when the interlock override switch is
activated by turning a key on the power panel. This maintains current in
the enable wires even when the overhead doors are open.
Related topics
For information about... See...
Systems affected by interlocks and
emergency stops “Comparing interlock and emergency
circuits” on page 62
Stopping a run with hardware “Pausing and stopping a run” on
page 60
Turning the BioCel off. “Turning Off the BioCel” on page 66