User Manual

116 Part 003609A revision 01 December 16, 2002
Amosphere NPM Installation Procedures (WCS)
Power On the NPM
The power for the NPM is controlled by circuit breakers in the PDP, located at
the top of each rack. Each power supply, RFSS module, cooling unit, and GPS
clock module has its own circuit breaker, which means it can be powered on and
off independently of the other devices.
 To power on the NPM
1 Ensure that your main +24V DC power supply is powered on and is providing a
power source that meets the electrical requirements listed on page 27.
2 Power on the upper and lower cooling units. On each rack, set breakers CB 01
and CB 14 to the ON (up) position.
The fans will start turning. If the fans do not start, ensure that the SGNL port on
each cooling unit is connected to the alarm wiring card. The fans will turn only
when the alarm cable is present.
3 Power on each power supply in the utility and radio shelves separately.
NOTE: The red OUTPUT FAIL light on each power supply
turns off within 3 s. If the OUTPUT FAIL light remains on or
flickers continuously, power down the chassis immediately and
replace the power supply.
Table 5.1 shows the circuit breakers for each power supply.