CHAPTER TWO
FIGURE 2.3
*** CAUTION ***
General Cautions/hazards to be considered when installing the TymMachine
into an equipment rack:
2.3.1 TMRA
- The maximum recommended ambient temperature (Tmra) that this equipment
is specified to operate at is +50
o
C.
2.3.2 ELEVATED OPERATING AMBIENT TEMPERATURE
- If installed in a closed or
multi-unit rack assembly, the operating ambient temperature of the rack environment
may be greater than room ambient. Therefor, consideration should be given to installing
the equipment in an environment compatible with the maximum rated ambient
temperature (Tmra).
2.3.3 REDUCED AIR FLOW
- The equipment has no cooling fans and depends on
convection for cooling. Installation in a rack may cause an excessive heat rise if
sufficient air flow is not available. Installation should be such that the amount of air flow
required for safe operation of the equipment is not compromised.
2.3.4 MECHANICAL
LOADING
- Mounting of the equipment in the rack should be such
that a hazardous condition is not achieved due to an uneven mechanical loading.
2.3.5 CIRCUIT
OVERLOADING
– Consideration should be given to the connection of the
equipment to the supply circuit and the effect that overloading of circuits may have on
over current protection and supply wiring. Appropriate consideration of equipment
ratings should be used when addressing this concern.
2.3.6 RELIABLE
EARTHING
– Reliable earthing of rack-mounted equipment should be
maintained. Particular attention should be given to supply connections other than direct
connections to the branch circuit (e.g., use power strips, chassis ground lug etc).
2-4
TM7000 TymMachine TCG/T (Rev D)
Symmetricom, Inc.
