Connecting The Digital Power Outputs To Digital Inputs - WAGO -I/O-SYSTEM 750 Manual

78 Connect Devices
With this connection, you can achieve SIL3/Cat. 4/PL e by re-reading the relay
states.
Open load detection not possible!
When connecting a load from positive digital power output Ox+ to the ground
connection 0 V (common ground), open load detection is not possible for digital
power output Ox+. Set the Open load detection parameter to "not active"
because otherwise the F I/O module is passivated and the "Open load"
diagnostic message is output.
7.3.3.8

Connecting the Digital Power Outputs to Digital Inputs

Pay attention to the protected installation of signal lines during short
circuit test "inactive"!
If you have set the Short circuit test parameter of an input to "inactive", the
signal lines must be installed protected among each other and between the
sensors and inputs according to EN 60204-1 or EN ISO 13849-2 (e.g., as
separate sheathed lines or in separate cable ducts).
Alternative measures for fault detection!
You can take alternative measures (e.g., antivalent evaluation) for fault detection
to achieve the required risk reduction for your application (e.g., SIL3/Cat.4/PL e).
The safety parameters of the F I/O module do not change.
You can connect the digital power outputs Ox+ to the digital inputs of the same or
another F I/O module. You then have to set the Short circuit test parameter to
"not active" for the digital input used because otherwise the F I/O module detects
a short circuit and the "Short circuit" diagnostic message is output.
You have to set the filter time of the digital input to double the value of the test
pulse length of the digital power output to adequately filter the test pulse of the
digital power outputs.
Also observe the minimum load of the digital power output.
For more information about configuring the F I/O module, read section
"Parameterization of the F I/O module with the WAGO Parameterization Tool".
Manual
Version 1.4.2, valid from HW/SW Version 01/02
750-667/000-003 4FDI/4FDO 24V/2A PROFIsafe V2 iPar
WAGO-I/O-SYSTEM 750