Using 230V Ac I/O Modules; Ac Modules Are Used In Another Fieldbus Node That Contains No Profisafe I/O Modules; Ac I/O Modules And Profisafe I/O Modules Are Used Together In One Fieldbus Node - WAGO -I/O-SYSTEM 750 Series Manual

WAGO-I/O-SYSTEM 750
753-661/000-003 4FDI 24V PROFIsafe V2 iPar
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7.2.2

Using 230V AC I/O Modules

If 230 VAC I/O modules are used together with PROFIsafe I/O modules in one
fieldbus node, there are two options:
7.2.2.1 230V AC Modules are Used in Another Fieldbus Node that Contains
no PROFIsafe I/O Modules
You have to use a separate 24 VDC power supply unit (SELV/PELV) for a
fieldbus node that contains PROFIsafe I/O modules. You have to use a PELV or
FELV power supply unit with protective grounding for a fieldbus node without
PROFIsafe I/O modules.
Avoid unacceptably high body voltages!
All 230 V AC voltages applied to the nodes must also be protected by a 30 mA
residual current circuit breaker.
In the simplest case, place the residual current operated circuit-breaker just behind
the junction of the supply network. Doing so allows you to fuse all paths.
Avoid vagabond voltages!
Never use a power supply unit to power fieldbus nodes with PROFIsafe I/O
modules and fieldbus nodes with 230 V I/O modules.
7.2.2.2 230V AC I/O Modules and PROFIsafe I/O Modules are Used Together
in one Fieldbus Node
An isolation transformer (basic insulation) must be used to supply the voltage for
the 230 VAC I/O modules. Between adjoining 230 VAC and 24 VDC I/O
modules, you have to take into account the double basic insulation and if
necessary, use separation modules 750-616/030-000.
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Manual
Version 1.4.0, valid from HW/SW Version 01/02
Connect Devices 61