Ventilation Considerations - Symmetricom SSU-2000e User Manual

Chapter 2 Installing the SSU-2000e
Rack Mounting the SSU-2000e

Ventilation Considerations

For proper ventilation, there should be at least 76 mm (2 RU) of free space below
the shelf.
Caution: To avoid excessive heat build-up resulting in equipment
damage, provide proper ventilation and cooling of the equipment.
Rack Mounting the SSU-2000e
The SSU-2000e shelf is passive and contains all the necessary interconnecting
signals to support a combination of plug-in modules. For example, the SSU-2000e
may be configured to contain two Clock modules, a Communications module, three
Input modules, and six Output modules configured with three pairs of summed
outputs.
The SSU-2000e shelf also provides specific connections for the following:
Grounding, see
External Power Inputs, see
Communications Interfaces, see
63
Alarm Contact Closures, see
Clock Inputs, see
60 SSU-2000e User's Guide
Caution: To maintain EMC compliance, use only properly shielded
cabling on all telecom signal wiring, including I/O, clocks, and Ethernet
connections. Ensure that connections are properly grounded.
Warning: To avoid serious personal injury or death, exercise
caution when working near high voltage lines. In particular:
Use extreme caution when installing the GPS antenna near,
under or around high voltage lines.
Follow local building electrical codes for grounding the antenna
system that is used with the SSU-2000e unit.
Caution: For continued fire protection, fuse the interface "A" power
feeds at the power distribution source for (5A @ 60 VDC).
This unit must be grounded. Refer all servicing to qualified
personnel.
Making Ground
Making Power
Making Alarm
Making Input
Connections, on page 62
Connections, on page 62
Making Communications
Connections, on page 71
Connections, on page 67
12713140-002-2 Revision E – October 2006
Connections, on page