User's Manual

78 4Motion System Manual
Chapter 2 - Installation
7 If the MGMT port is used for remote management, connect it to the
appropriate data equipment (use a straight Ethernet cable to connect to a
hub/switch/router). The maximum length of the Ethernet cable is 100m.
8 Connect the DC power cable to the power jack of the PIU module. If a
redundant PIU is installed, connect a DC power cable also to the second PIU
module. Connect the power cord(s) to the -48 VDC power source(s), as follows.
» Black wire to the 48 VDC contact of the power source.
» Red wire to the + (Return) contact.
» Ground wire to the ground.
2.3.9.2 Air Ventilation Unit (AVU)
The 2U high, 84 HP wide AVU includes a 1U high integral chamber for inlet
airflow and a 1U high fan tray with an internal alarm module. To support a high
availability BTS, the fan tray includes 10 brush-less fans, where 9 fans are
sufficient for cooling a fully loaded chassis. To further support high availability,
the chassis can operate with the hot-swappable fan tray extracted from it for a
period of time sufficient for replacing it (up to 10 minutes).
Figure 2-19: AVU Drawer Front Panel
Table 2-14: AVU LEDs
LED Status Description
PWR ALRM
Off Off No 5V power input
Red Red 12V power failed
Green Red One or more fans have failed
Green Off AVU operates properly