Pyronix Castle EURO 162 Installation Reference page 5

1.2.2 The EURO 280 Bus Diagram
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.
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.
EURO 162/280 Installation Manual
Page: 5