Universal Robots UR5 User Manual page 26

3.1. Introduction
DANGER:
1. Never connect a safety interface to a PLC which is not
a safety PLC with the correct safety level. Failure to follow
this warning could result in serious injury or death as the
safety stop function could be overridden. It is important to
keep safety interface signals seperated from the normal I/O
interface signals.
2. Every minus connection (0V) is referred to as GND,
and is connected to the shield of the robot and the con-
troller box. All mentioned GND connections are only for
powering and signaling. For PE (Protective Earth) use the
M6 sized screw connections marked with earth symbols
inside the controller box. The grounding conductor shall
have at least the current rating of the highest current in the
system. If FE (Functional Earth) is needed use one of the M3
screws close to the screw terminals.
3. Make sure that the mounting instructions are fol-
lowed, see section 2.5.
4. Use original cables supplied with the robot only. Do
not use the robot for applications where the cables will
be subjected to flexing. Contact your supplier if longer or
flexible cables are needed.
5. Make sure that all equipment not rated for water
exposure remains dry. If water comes inside the product,
lockout and tagout all power and then contact your
supplier.
6. Care must be taken when installing interface ca-
bles to the robot I/O. The metal plate in the bottom is
intended for interface cables and connectors. Remove the
plate before drilling the holes. Make sure that all shavings
are removed before reinstalling the plate. Remember to
use correct gland sizes.
CAUTION:
1. The robot has been tested according to international
IEC standards for EMC (ElectroMagnetic Compatibility). Dis-
turbing signals with levels higher than those defined in the
specific IEC standards can cause unexpected behavior of
the robot. Very high signal levels or excessive exposure can
damage the robot permanently. EMC problems are found
to happen usually in welding processes and are normally
prompted by error messages in the log. Universal Robots
cannot be held responsible for any damages caused by
EMC problems.
2. According international IEC standards for EMC ca-
bles going from the controller box to other machinery and
factory equipment may not be longer than 30m, unless
extended tests are performed.
26 UR5
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