User Manual

MDR2400 and MDR5800 User Manual
862-01881 Issue 8 Page 19
2.3.8 IU/OU Power Interconnect
This connector (socket) is used for power interconnection between the IU and the
OU. The connection is made using UV-protected 2-core cable. The cable is
connected to a GREEN connector, a plug. The polarity sense (labelled) must be
maintained between the IU and the OU.
2.3.9 Auxiliary In/Out Port
The auxiliary in/out port is used for remote monitoring and control. The following are
provided
• Two inputs (for sensing contact closure or opening) are provided to sense site
alarm inputs. The states of these alarm inputs can be monitored with NMS, as
well as from an SNMP Management Station.
• Two relay contact outputs, normally-open and normally-closed contacts, are
provided as alarm / auxiliary outputs. Output states are software customised
and controlled. The outputs are used to indicate alarm or other states selected
by the operator via the NMS or a SNMP Management Station.
2.3.10 DC Power Input
This connector (socket) is used for power input to the IU. The connection is made
using 2-core cable. The cable is connected to a GREY connector, a plug. The
polarity-sense (labelled) must be observed and implemented.
2.3.11 Fuse Holder
This holder is used to hold a fuse (5A).
2.3.12 ON/OFF Switch
This switch is used to control power input to the Indoor Unit (and indirectly the
Outdoor Unit).
2.3.13 Ground Terminal
This is used to accept connection to an earth strap, terminated with a crimped earth
lug. Refer to the installation chapter for details on wire/earth lug requirements.