Testable Type 4 Single-Beam Safety Light Barriers; Customer-Specific Testable Single-Beam Safety Light Barriers - Leuze electronic MSI 400 Operating Instructions Manual

4.3.2

Testable type 4 single-beam safety light barriers

Electrical connection: Example from MSI.designer
Testable type 4
single-beam safety
light barriers
Route the transmitter and receiver lines outside of the switchbox so that a short-circuit between
these lines can be avoided, e.g. route them separately in separate sheathed cables or protected
areas.
Tab. 4.23: Functions with testable type 4 single-beam safety light barriers
Function
Testing
Series connection/
cascading
NOTICE
You can find additional information in the operating instructions for the type 4 single-beam
i
safety light barriers.
4.3.3

Customer-specific testable single-beam safety light barriers

You can find additional information on creating customer-specific elements in the software manual.
NOTICE
Ä Select the minimum value for the desired test gap in the settings of the customer-specific
i
element dialog.
Ä Regardless of the test gap, the entire OFF-ON delay of the cascade must be less than the
maximum OFF-ON delay of the respective test output (see System response times [chapter
12.1]) -2 ms. Otherwise, the test gap will cause a switch-off. For safe input/output modules,
this value = 12 ms - 2 ms = 10 ms.
Ä Use a shielded or separate cable for the connections from the test output of the module (X1
to X8) to the test input of the transmitter and from the output of the receiver to the safe input
of the module (I1 to I8). Otherwise, a short-circuit between the signals may prevent error de-
tection by this test.
Leuze electronic
WARNING
Info
Required
Maximum of seven pairs per inputs
Note the maximum line resistance of 100 Ω.
Test input TE (transmitter) at T2
Output Q (receiver) at I4
MSI 400
Connecting devices
49