RTCU NX-900 Technical Manual V1.02
Advanced M2M/IIoT Gateway
Logic IO ApS.
Ph: (+45) 7625 0210
Holmboes Allé 14
Fax: (+45) 7625 0211
8700 Horsens
Page 17 of 45
Denmark
reference as the outside and a potential difference may occur. This difference can interrupt the
behavior of the device and in worst case damage that part of the device. This must be taken in
consideration when the NX-910 devices are supplied with AC supply. When the NX-910 is
supplied with DC voltage, this "potential difference" issue may not be observed as the DC power
supply usually has the same potential as the rest of the system.
In order to avoid this, the
Earth
connection on the AC supply rail can be connected to the terminal
that has been marked with the symbol
.
For circuitry in situations where significant Earth ground currents can flow isolating the DC
ground from Earth grounds may be desired. In this case the DC ground may be tied together with
the Earth ground through a high impedance connection.
For the best EMI performance/ESD immunity in combination with a common reference it is
recommended to connect DC ground and Earth together with a low-inductance connection.