WAGO-I/O-SYSTEM 750
Commissioning 103
750-666/000-003 4FDI/2FDO 24V/10A PROFIsafe V2 iPar
Manual
Version 1.2.0, valid from HW/SW Version 01/01
7.4.5.2
Short circuit Test Ix Parameter
Protect signal lines when installing!
When connecting signal lines to the digital inputs of the PROFIsafe I/O module,
make sure that only the following signals are transmitted within a cable or non-
metallic sheathed cable:
•
Those whose short circuit does not lead to a dangerous failure of the safety
function
•
Those supplied by different clock outputs
Therefore, please make sure that the signal lines are installed in accordance with
EN 60204-1 or EN ISO 13849-2 (e.g., as separate sheathed lines or in separate
cable ducts).
The digital inputs are tested cyclically by the PROFIsafe I/O module. If the
Short
circuit test
parameter is set to the "not active" value, then the PROFIsafe I/O
module only tests the input circuit for internal errors. You have to set the
Short
circuit test
parameter to "not active" if, for example, you connect the
semiconductor output of a sensor (such as light arrays, light barriers, etc.) to the
digital input of the PROFIsafe I/O module.
If you set the
Short circuit test
parameter to the "active" value, then you have to
connect the digital input to the associated clock output via a switching element
(e.g., break contact). By doing so, the PROFIsafe I/O module tests the signal line
for short circuits against external voltages. If the short circuit test detects an
external voltage on the digital input, the PROFIsafe I/O module is passivated and
the "Short circuit" diagnostic message is output to the safe PLC.
Table 28: Input / clock output assignment
Inputs
Associated clock output (for activated short circuit test)
I1, I3
T1
I2, I4
T2
Using the cyclical tests of the digital inputs, the PROFIsafe I/O module detects the
following errors on the digital inputs:
