Comtech EF Data CDM-740 - Manual (Page 40)

CDM-740 Advanced Satellite Modem Revision 0
Installation MN-CDM740
2–2
2.2 Mounting
If the CDM-740 is to be mounted in a rack, ensure that there is adequate clearance for ventilation,
particularly at the sides. In rack systems where there is high heat dissipation, forced air cooling
must be provided by top or bottom mounted fans or blowers. Under no circumstance should the
highest internal rack temperature be allowed to exceed 50°C (122°F).
IMPORTANT
The CDM-740 CANNOT have rack slides mounted to the side of the chassis.
Three cooling fans are mounted in the left-hand side of the unit. Comtech EF Data
recommends that an alternate method of support within the rack be employed, such
as rack shelves or the optional rear support brackets. If there is any doubt, please
consult the Comtech EF Data Customer Support department.
2.2.1 Optional Rear-Mounting Support Bracket Installation
Install optional rear-mounting support brackets using mounting kit KT/6228-2:
Quantity Part Number Description
2 HW/10-32SHLDR Screw, #10 Shoulder
4 HW/10-32FLT Washer, #10 Flat
2 HW/10-32SPLIT Washer, #10 Split
2 HW/10-32HEXNUT Nut, #10 Hex
2 FP/6138-1 Bracket, Rear Support
4 HW/10-32x1/2RK Bolt, #10 Rack Bracket
The tools required for this installation are a medium Phillips
™ screwdriver and a 5/32-inch SAE
Allen
™ Wrench. The kit is installed as illustrated in Figure 2-1 via the following procedure:
Step Procedure
1
Secure the #10 shoulder screws to the unit chassis through the rear right and left side
mounting slots, using the #10 flat washers, #10 split washers, and #10 hex nuts as
shown.
2
Install the rear support brackets onto the equipment rack threaded rear mounting
rails, using the #10 rack bracket bolts.
3
Mount the unit into the equipment rack, ensuring that the shoulders of the #10 shoulder
screws properly engage into the rear support bracket slots.