Parameter Short-Circuit Test Ix; Table 39: Input /Clock Output Assignment - WAGO -I/O-SYSTEM 750 Manual

WAGO-I/O-SYSTEM 750
750-667/000-003 4FDI/4FDO 24V/2A PROFIsafe V2 iPar
8.3.4.2

Parameter Short-Circuit Test Ix

Protect signal lines when installing!
When connecting signal lines to the digital inputs of the F 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 F I/O module. If the Short-circuit
test parameter is set to the "not active" value, then the F 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 F 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 F 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 F I/O module is passivated and the "Short circuit"
diagnostic message is output to the safe PLC.

Table 39: Input /Clock Output Assignment

Inputs
I1, I3
I2, I4
Using the cyclical tests of the digital inputs, the F I/O module detects the
following errors on the digital inputs:
Associated Clock Output (for Activated Short-Circuit Test)
Version 1.4.2, valid from HW/SW Version 01/02
Commissioning
T1
T2
95
Manual