BECKHOFF EP1908 - Manual (Page 33)

Operation
EP1908-0002 31
4.5.3.1 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.
CAUTION
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.
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 and 4, 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.
4.5.3.2 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 and 4, 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.