Connection Example For Digital Inputs In "Rotary Table" Operating Mode (1 Of N); Figure 30: Connection 1 × Mode Selector Switch - WAGO 750 Manual

82 Commissioning
7.5.1.4 Connection Example for Digital Inputs in "Rotary Table" Operating
Mode (1 of N)
Use of "Rotary Table" operating mode
If you have set the Operating Mode parameter to the value "Rotary Table" (1 of
N), the temporal logic evaluation of the input bits must be performed by a suitable
function block in the safe PLC.
No detection of cross circuits between digital inputs
In "Rotary Table" operating mode, cross circuits between the digital inputs cannot
be detected, since all inputs are tested with the same clock output.
If a cross circuit can lead to a hazardous state, make sure that the signal lines
are installed with protection between the lines themselves and between the
sensors and inputs per IEC 60204-1 or ISO 13849-2 (e.g., as separate sheathed
lines or in separate cable ducts).
Figure 30: Connection 1 × Mode Selector Switch
If you have set the Operating Mode parameter to the value "Rotary Table" using
the WAGO parameterization tool, you can connect the normally open contacts of
a mode selector switch or several rotary table sensors to the digital inputs of the
F I/O module.
Set the Short Circuit Test parameter for all digital inputs to "Activated" and the
Pre-Evaluation parameter to "Single-Channel."
Then connect the normally open contacts of the mode selector switch to the
digital inputs and the common clock line of the mode selector switch to clock
output T1. The process image of the digital inputs now contains the switch setting
of the mode selector switch.
With this wiring, you can achieve SIL2/Cat.2/PL d.
Manual
Version 1.0.0, valid from HW/SW Version 01/01
WAGO I/O System 750
753-661/000-004 4FDI 24V PROFIsafe