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 750-666/000-003 Manual

56 Connect Devices
6.2.1

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:
6.2.2 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 (PELV/SELV) 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.
6.2.2.1 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.
750-666/000-003 4FDI/2FDO 24V/10A PROFIsafe V2 iPar
Version 1.2.0, valid from HW/SW Version 01/01
WAGO-I/O-SYSTEM 750
Manual