2.2. The Emergency Stop Interface
2.2.2
Connecting an External Emergency Stop Button
In almost every robot application it is required to connect one or more exter-
nal emergency stop buttons. Doing so is simple and easy. An example of how
to connect one extra button is shown above. Remember that only approved
emergency stop buttons with double switches are good enough. It is also possi-
ble to connect light curtains and door switches etc., as long as the equipment
is approved for emergency stop with the right safety level.
2.2.3
Using an External Emergency Stop Power Supply
If the robot is part of a bigger system, it is sometimes preferred or required to use
an external source of 24V for the emergency stop circuitry. How to connect an
external source is shown above.
2.2.4
Connecting to Other Machinery
When the robot is used together with other electro-mechanical machinery, it
is often required to set up a common emergency circuit. This ensures that if a
dangerous situation arises, the operator does not need to think about which
buttons to use. It is also often preferable for every part of a sub-function in a
product line to be synchronized, since a stop in only one part of the product
line can lead to a dangerous situation.
A UR robot uses simple 24V signals for emergency signaling as does most
industrial machinery. It is therefore possible to connect the controller box to
most industrial machinery, without using any special and expensive equipment,
such as safety approved relays and PLCs. The principle is to choose a common
24V voltage source, and connect all emergency stop button in series, and then
all the relays of the machinery. An example with two UR robots is shown below.
Remember to check that all emergency stop buttons are rated for the total
current consumption of all the connected emergency stop relays.
20
UR-6-85-5-A
Summary of Contents for UR-6-85-5-A
Page 1: ...UR 6 85 5 A User Manual Version 1 11 January 2010...
Page 2: ...2 UR 6 85 5 A...
Page 6: ...Contents 6 UR 6 85 5 A...
Page 16: ...1 4 Mounting Instructions 16 UR 6 85 5 A...
Page 33: ...Chapter 3 PolyScope Software 33...