User's Manual

PAGE 18 DESCRIPTION

2 Power amp (option). DC

ground

3 Chassis Ground

4 +12VDC(nom) input

5 0VDC input

Notes: 12VDC nominal is normally supplied with 13.6VDC

for battery float charge reasons.

24VDC nominal is normally supplied with 27.3VDC

for battery float charge reasons.

3.5.3 Fuses

Fuse F1 on the fuse-board is a 2A quick-blow, 20 x 5mm component and protects the 12V

line to the MMI PCB.

Fuse F2 on the fuse-board is a 10A quick-blow, 20 x 5mm component and protects the

24V line to the Power Amplifier, if fitted

Fuse F5 on the Xfin Control Card is a 3.15A quick-blow, 20 x 5mm component and

protects the 12V line to the PCB.

In event of failure, the reason for the failure should be investigated prior to replacement.

The fuse should only be replaced with a correctly specified component.

3.5.4 Ethernet

This is a 10/100 base-T RJ45 connection. This is a switch (not a NIC) configuration – care

should be taken to use the correct cable (crossover or straight-through) when connecting

to a network. The use of shielded cables is recommended, especially for VHF installations.

The two indicator LEDs, integrated into the connector, show 100Mbps bandwidth detection

and traffic activity. A third LED, on the Control Card shows if a connection is present.

Pin Description

1 Eth Rx-Data, balanced input 1

2 Eth Rx-Data, balanced input 2

3 Eth Tx-Data, balanced output 1

4 NC

5 NC

6 Eth Tx-Data, balanced output 2

7 NC

8 NC