Digital Outputs - Universal Robots UR5 User Manual

3.3. Controller I/O
Electrical specifications of the internal power supply
Internal 24V voltage tolerance
Current from internal 24V supply
Overload protection
External power supply voltage
Note that the safeguard (yellow) 24V connections are sourced by the same
internal 24V power supply as the 24V connections of the normal I/O, and that
the maximum of 1.2 A is for both power sources together.
If the current load of the internal 24V power supply is exceeded, an error
message is printed on the log screen. The power supply will automatically try to
recover after a few seconds.

3.3.1 Digital Outputs

Source current per output
Source current all outputs together
Voltage drop when ON
Leakage current when OFF 0
The outputs can be used to drive equipment directly e.g. pneumatic relays
or they can be used for communication with other PLC systems. The outputs
are constructed in compliance with all three types of digital inputs defined in
IEC 61131-2 and EN 61131-2, and with all requirements for digital outputs of the
same standards.
All digital outputs can be disabled automatically when a program is stopped,
by using the check box "Always low at program stop" on the I/O Name screen
(see section ??). In this mode, the output is always low when a program is not
running.
The next subsections show some simple examples of how the digital outputs
could be used.
Load Controlled by Digital Output
All Rights Reserved
Parameter
Parameter
CAUTION:
1. The digital outputs are not current limited and overriding
the specified data can cause permanent damage to them.
However, it is not possible to damage the outputs if the in-
ternal 24V power supply is used due to its current protection.
2. The controller box and the metal shields are con-
nected to GND. Never send I/O current through the shields
or earth connections; it might damage to the I/Os.
33
Min Typ Max
-15% - +20%
- - 1.2
- 1.4 -
10 - 30
Min Typ Max
0 - 2
0 - 4
0 - 0.2
0 - 0.1
Unit
-
A
A
V
Unit
A
A
V
mA
UR5