Data Sheet

Pulsar
®
EN54/LCD series power supply unit
Power supply for fire alarm systems 27,6 V DC
Tel. [phone], fax: [phone], www.pulsar.pl, e-mail:[e-mail]
ETHERNET network communication.
Communication in the Ethernet network is possible due to the additional interfaces: Ethernet „INTE” and RS485-
ETH „INTRE”, according to the IEEE802.3 standard.
The Ethernet „INTE” interface features full galvanic isolation and protection against surges. It should be mounted inside the
enclosure of the PSU.
The RS485-ETHERNET „INTRE” interface is a device used to convert signals between the RS485 bus and the
Ethernet network. For proper operation, the unit requires an external power supply in the range of 10÷30 V DC e.g. drawn
from a PSU of the EN54 series. The physical connection of the interface takes place under galvanic isolation. The unit is
mounted in a hermetic enclosure protecting against adverse environmental conditions.
Ethernet communication using the RS485-Ethernet „INTE” interface.
Ethernet communication using the RS485-Ethernet „INTRE” interface.
10-30VDC
Interface
RS485-ETH
“INTRE”
Remote monitoring (options: Ethernet, RS485).
The PSU has been adjusted to operate in a system that requires a remote control of the parameters in a
monitoring centre. Transmitting data concerning PSU status is possible due to an additional, external
communication module responsible for communication in Ethernet or RS485 standard.
Different connection topologies, presented later in this chapter, are only a part of possible communication schemes.
More examples can be found in the manuals dedicated to individual interfaces.