Atmospheric Single-Arm Robot Safety
User’s Manual SEMI S2 Systems
Brooks Automation
Revision 1
2-13
SEMI S2 Systems
The robot has no user serviceable parts and maintenance is minimal. When mainte-
nance occurs, the equipment is fully de-energized, which results in a Type 1 task haz-
ard rating.
OEM Systems recommends the use of presence-sensing safeguards to stop the auto-
matic operation of the robot. When an object is sensed, the hazardous motion within
the restricted envelope is stopped immediately and any automatic operation is
stopped. That is, the failure of a single component does not prevent the normal stop-
ping action of the robot, but does prevent robot automatic operation until the compo-
nent failure is corrected.
OEM Systems does not provide an enclosure or barrier for the robot, but the amount
of force for each robot axis is enough to require the use of an enclosure or barrier as
protection. An enclosure/barrier prevents people from reaching the restricted enve-
lope. If access is required through the enclosure-barrier into the restricted envelope,
it should be through an interlocked access. If it is necessary to bypass the interlock,
OEM Systems recommends that the interlock is automatically restored when the
enclosure is again closed.
OEM Systems strongly recommends an enclosure/barrier that is hardware inter-
locked. The purpose of the interlock is to ensure that any single component failure
does not prevent the normal stopping action of the robot, and does prevent automatic
operation until the component failure has been corrected. Opening the interlock cir-
cuit should either stop the robot and remove drive power to the robot actuators or
stop automatic operation of the robot and any associated equipment.
To restore automatic operation, the user must exit the restricted envelope, restore the
safeguards required for automatic operation, and initiate a deliberate start-up proce-
dure.
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