User Manual

MDR2400/5800-SR, Orion2410/5810-SRi and Orion 5825-SR
862-01881 Issue 12c Page 23
2.3.12 DIU DC Power Input
This connector (socket) is used for power input to the DIU. The connection is made
using 2 or 3-core cable. The cable is connected to a two pin GREY connector on the
MDR radio and a THREE pin GREEN connector on the Orion unit - both are plugs.
The polarity-sense (labelled) must be observed and implemented. A ground
connection is available on the three-pin connector. This ground connection is not
required if the ground terminal is connected (2.3.15).
2.3.13 Fuse Holder
This holder is used to hold a fuse (2A, slow blow fuse).
2.3.14 ON/OFF Switch
This switch is used to control power input to the Digital Indoor Unit (and indirectly the
RF Unit). No switch is fitted to the Orion DIU. The unit will start up as soon as the
required DC voltage is applied.
2.3.15 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. A
ground connection is also available on the three-pin DIU DC power connector.