Epson RC620 Safety And Installation page 20

1. Safety
The safeguard interlock must be installed so that it can maintain a safe condition
until the interlock is released on purpose once it initiates. The latch-release input
is provided for the EMERGENCY connector on the Controller to release the latch
condition of the safeguard interlock. The latch release switch of the safeguard
interlock must be installed outside of the safeguarded area and wired to the
latch-release input.
It is dangerous to allow someone else to release the safeguard interlock by mistake
while the operator is working inside the safeguarded area. To protect the operator
working inside the safeguarded area, take measures to lock out and tag out the
latch-release switch.
Presence Sensing Device
The above mentioned safeguard interlock is a type of presence sensing device
since it indicates the possibility of somebody being inside the safeguard system.
When separately installing a presence sensing device, however, perform a
satisfactory risk assessment and pay thorough attention to its dependability.
Here are precautions that should be noted:
- Design the system so that when the presence sensing device is not activated
or a dangerous situation still exists that no personnel can go inside the
safeguard area or place their hands inside it.
- Design the presence sensing device so that regardless of the situation the
system operates safely.
- If the robot stops operating when the presence sensing device is activated, it
is necessary to ensure that it does not start again until the detected object has
been removed. Make sure that the robot cannot automatically restart.
Resetting the Safeguard
Ensure that the robot system can only be restarted through careful operation from
outside the safeguarded system. The robot will never restart simply by resetting
the safeguard interlock switch. Apply this concept to the interlock gates and
presence sensing devices for the entire system.
Robot Operation Panel
When using the robot operation panel, it must be installed so as to operate the
robot system from outside the safeguard.
6 Safety and Installation (RC620 / EPSON RC+ 6.0) Rev.12