Safety Door Switch - Epson T3 Series Safety And Installation

2.5.2 Safety Door Switch

■ The interlock of the Safety Door must be functioning when the robot
system is operated. Do not operate the system under the condition
that the switch cannot be turned ON/OFF (e.g. covering the switch with
tape). Operating the robot system when the switch is not functioning
WARNING
properly is extremely hazardous and may cause serious safety
problems as the Safety Door input cannot fulfill its intended function.
In order to maintain a safe working zone, a safeguard must be set up around the
Manipulator. The safeguard must have an interlock switch at the entrance to the
working zone. The Safety Door that is described in this manual is one of the
safeguards and an interlock of the Safety Door is called a Safety Door switch.
Connect the Safety Door switch to the Safety Door input terminal on the
EMERGENCY connector.
The Safety Door switch has safety features such as temporary hold-up of the
program or the operation-prohibited status that are activated whenever the Safety
Door is opened.
Observe the following in designing the Safety Door switch and the Safety Door.
- For the Safety Door switch, select a switch that opens as the Safety Door opens,
and not by the spring of the switch itself.
- The signal from the Safety Door (Safety Door input) is designed to input to two
redundant signals. If the signals at the two inputs differ by two seconds or
more, the system regards it as a critical error. Therefore, make sure that the
Safety Door switch has two separate redundant circuits and that each connects
to the specified pins at the EMERGENCY connector on the Controller.
- The Safety Door must be designed and installed so that it does not close
accidentally.
Safety and Installation (T, VT / EPSON RC+ 7.0) Rev.15
2. Installation
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