8 Installation
8.3 Connecting the power supply
XN-312-GW-EC gateway 07/20 MN050010-EN
Eaton.com
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8.3 Connecting the power supply
The gateway and the modules are powered using the X3 terminals. The gate-
way uses the voltage at X3 to produce the 5-V supply voltage for the mod-
ules on the system bus, with the maximum output current being 1.6 A.
Moreover, the gateway uses the voltage at X3 to produce the 24-V supply
voltage for the following system bus modules, with the maximum output
current being 1.6 A:
•
Analog module
•
Technology modules
In order for XN300 slice modules with terminals for an external power supply
to be able to perform their specified functions, they must be supplied with an
external 24 VDC voltage.
Take into account the total power consumption and the voltage drop on your
system bus and, if necessary, include additional power supply modules in
your design. You can use the XN300-Assist planning and commissioning pro-
gram for the corresponding calculations.
The two V+ terminals are internally connected to each other, as are the two 0
V terminals. The internally connected terminals can be used to extend the
24 V and 0 V supply voltage connections. However, it is necessary to make
sure that a total current of 6 A is not exceeded per terminal.
DANGER
In safety-relevant applications the power supply providing
power to the XN300 system must feature a PELV power supply
unit (protective extra low voltage).
DANGER
The gateway has protection against polarity reversal for the 24 V
DC POW supply. If, however, the gateway is connected to a
grounded device, e.g., a computer, via the diagnostic interface,
the gateway may be destroyed if the polarity of the power sup-
ply is reversed!
