EURO 280 Installation Manual
Page: 4
1.2 The Devices
1.2.1 The EURO 280 Bus Diagram
NOTE 5: (IMPORTANT!) If an expansion module with a power supply on board is connected, the D2+ terminal MUST
NOT be connected between the main bus and module.
All EURO peripherals; LCD keypads,
readers, expanders etc. are connected
via the D1-, D2+, D3 and D4 terminals.
This is an example of what a typical
Euro 280 bus may look like.
General Principles:
NOTE 1: No alarm system cable should
be run with other cables carrying AC or
digital signals.
NOTE 2: The cables should be
protected by the use of grommets
where appropriate.
NOTE 3: For greater than 1000m range
standard isolated RS485 repeaters are
required.
NOTE 4: There MUST be a ferrite bead
fitted to the data wires of a EURO-
PROXE (if connected). The Ferrite bead
is supplied with the reader.
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