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MEDEA Installation Manual
Figure 54 - MEDEA battery fixing in ABS box
IMPORTANT
The backup battery must not be connected to the CPU of the control unit until all
connections have been completed.
4.4
RS485 BUS connection
Connect the 4-wire BUS cable for connecting the control unit, readers, keypads and any expansion
modules to the
+,
A
,
B
and
─
terminals. The BUS only requires termination resistors in special cases, as
2.3.1 BUS dimensions and topologies
The cable shields may only be connected together in the control unit, or only in the supplementary power
unit, to the negative terminal (
─
) of the power supply.
4.4.1
Central BUS connection
MEDEA/32 control units have only one BUS connection. The MEDEA/64 and MEDEA/160 control units
have two BUS connections that are logically the same but electrically separate. Either connections can be
used. In all control panels there is an additional polarised BUS connector for the alternative connection of
the ER700-RF interface via a special cable.
Figure 55 - MEDEA BUS connections
Alternative BUS connection,
with appropriate cable, to
ER700-RF
Long clamp supplied for compulsory
battery fixing.
The cable ties passes through the
holes for routing the cables.
12 V7.2Ah/9Ah
Summary of Contents for MEDEA
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