Fig. 25 Maximum Permissible Sensor Self-Test Duration - Beckhoff EP1908 Operating Instructions Manual

Operation
Parameter name
Detected Modules
5.6.3.1 EP1908-0002 configuration for light barriers, light grids, light curtains,
etc.
The EP1908-0002 also supports direct connection of contact-free protective devices with two self-testing
outputs such as light barriers, light grids, light curtains, laser scanners, etc.
Sensors with self-testing outputs
Only sensors with self-testing outputs and a maximum sensor self-test duration of 350 µs may be
connected to the EP1908-0002.
Fig. 25: Maximum permissible sensor self-test duration
Parameter
To connect these sensors please set the following parameters for the EP1908-0002 in the TwinCAT System
Manager:
• Connect the two sensor signals either to channels 1 & 2, 3 & 4 and 5 & 6 or channels 7 & 8 and
activate asynchronous repetition OSSD or any pulse repetition for the two inputs used under parameter
Logic for channel x and y. The difference between these settings is that with any pulse repetition
simultaneous tests of the OSSD signals up to 350 µs are allowed.
• For the two inputs used set the sensor test for the EL1908-0002 to false.
5.6.3.2 EP1908-0002 configuration for safety switching mats
The EP1908-0002 also supports direct connection of safety mats that operate based on the cross-circuit
principle.
Parameter
To connect these safety mats please set the following parameters for the EP1908-0002 in the TwinCAT
System Manager:
• Connect the two sensor signals either to channels 1 & 2, 3 & 4 and 5 & 6 or channels 7 & 8 and
activate the entry short cut channel x/y is no module fault for the two inputs used under parameter
Logic for channel x and y.
40
Meaning
internal use (read only)
Version: 3.0.0
CAUTION
Values
EP1908