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9. Remote monitoring (options)
PSU has been adjusted to operate in a system that requires a remote control of parameters in a monitoring
centre. Implementation of this function is possible upon installation of an additional communication interface.
Data are transmitted using the modbus protocol, and their exchange may be effected through a RS485 bus
or through the Ethernet.
When installing optional features in power supply unit, power supply current consumption, used for
calculation of standby time, should be taken into account (see section. 6.8).
9.1.
ETHERNET network communication.
Communication in Ethernet network is possible due to additional Inte
rface: Ethernet „INTE-C”, compliant to
IEEE802.3 standard.
Ethernet „INTE-C” interface features full galvanic isolation and protection against surges.
It should be mounted inside enclosure of PSU. Upon installation, a possibility of connection to the Ethernet
is enabled.
An example diagram of PSUs connected to the Ethernet via the INTE-C interface is presented below.
Fig. 31. Ethernet network communication using Ethernet
„INTE-C” interface.
9.2.
RS485-ETHERNET network communication.
Communication with
the PSUs may be effected on the basis of the RS485 bus via additional „INTR-C” and
„INTRE-C” modules..
In this kind of communication, an additional RS485-
TTL „INTR-C” interface must be installed in each PSU,
enabling connection of the PSU to the RS485 bus. A maximum of 247 PSUs may be connected to the bus.
Connection with the Ethernet will be enabled by the RS485-
ETHERNET „INTE-C” interface equipped with a RJ45
socket.
RS485-
ETHERNET „INTRE-C” interface is a device used to convert signals between RS485 bus and Wi-Fi
network. For proper operation, unit requires an external power supply in range of 10÷30 V DC e.g. drawn from a
PSU of EN54C-LCD series. Unit is mounted in a hermetic enclosure protecting against adverse environmental
conditions.
An example diagram of PSUs working in a RS485 bus, connected to the Ethernet, has been presented
below.