Exicom Limited EX7100-3 Benutzerhandbuch

 

EX7100 Technical Manual – VHF Fan Assembly 

 

©2001 Exicom Technologies (1996) Ltd 

VHF Fan-1 

Issue 1 – August 2001 

A Fan Box has been designed to assist with the cooling of the PA Heatsink casting for the 
VHF EX7100 product range. 

The Fan Box consists of a metal enclosure with two (2) fan assemblies that fits over (and 
is bolted to) the existing PA Heatsink. DC Supply for the fans is provided by the existing 
DC input socket on the rear of the EX7100 Terminal. 

Note:  Exicom recommends fan replacement every 5 years. 

The Fan Box can be used with DC voltages between 10.8 to 60 V DC to suit the 
relevant power supply variant within the EX7100 Terminal. 

All VHF EX7100 Terminals produced after 1 May 2001 will include the Fan Box (Product 
Code 61-8057-00002). It will be factory-fitted during the manufacturing process. 

The Fan Box fits snugly around the existing PA Heatsink casting and does not adversely 
affect the overall width or depth of the EX7100 Terminal but does affect the height. 

The top of the Fan Box will be approximately 40mm above the top cover of the EX7100 
Terminal. However, as it is recommended that a gap of at least 2U (89mm) is left 
above/below the EX7100 Terminal and any other equipment, this additional height should 
not become a problem for standard 19” Rack mounting. 

The following sections detail the steps necessary to remove the Fan Box to allow access 
to the PA Heatsink casting. 

> 

M5 Short Arm Hex Wrench 

> 

Medium sized insulated flat-blade screwdriver 

1) 

It is necessary to isolate the EX7100 Terminal from any mounting shelf prior to removal of 
the Assembly. 

 

(Depending on the lengths of any antenna, telephone or DC power cables, it will probably 
be necessary to remove these to allow unobstructed Terminal access) 

2) 

Switch off the DC supply to the Terminal (if not already removed) and place the Terminal 
on a clean, flat surface.