Power Supply Concept - WAGO 750-489 Manual

112 Connect Devices
6.2

Power Supply Concept

Ex i I/O modules shall only be supplied via Ex i 24 VDC power supply
module!
Ex i I/O modules shall only be operated with an Ex i 24 VDC power supply
module.
Requirements for Clearances and Creepage Distances
For all sections of a node that contain I/O modules for Ex-i use, stricter require-
ments with regard to clearances and creepage distances apply.
• Before such a node section, the respective Ex i supply module (750-606
or 750-625/000-001) ensures the required distance.
• After such a node section, 4 distance modules (750-616) must be used.
Exceptions: If the following section consists of:
• an end module for internal bus extension (750-627), 1 distance
module (750-616) is sufficient;
• an end module (750-600), no distance modules are required.
Do not exceed maximum current via power contacts!
The maximum current available from the Supply Module Ex i (750-606 or 750-
625/000-001) is 1 A.
When configuring the system, ensure that this current is not exceeded.
If exceeded, an additional potential feed module must be used.
Keep the air and creep distances between intrinsically safe segments!
The maximum current available from the 750-606 or 750-625/000-001 Ex-i
Supply Module is 1 A.
If the use of further 24 VDC Ex i Supply modules is necessary for reasons of
extent of utilization, four Separation Modules (750-616) must be used to
guarantee the distance between the intrinsically safe segments.
Further information about explosion prevention!
Further information about explosion prevention can be found in section "Use in
Hazardous Environments"!
The Ex i I/O module (750-489) receives the 24 V voltage supply potential and the
0V potential for the field level from an upstream Ex i I/O module or from an Ex i
Manual
Version 1.1.0, valid from FW Version 02
WAGO-I/O-SYSTEM 750
750-489 4AI RTD/TC/Strain Gauge Ex i