User Manual

ADCP-75-159 • Issue 1 • August 2003 • Section 2: Description
Page 2-6
© 2003, ADC Telecommunications, Inc.
2.11 Cooling
Continuous airflow for cooling is provided by dual fans mounted on the right side of the HU
housing. A minimum of 3 inches (76 mm) of clearance space must be provided on both the left
and right sides of the HU for air intake and exhaust. An alarm is provided if a high temperature
condition (>50º C/122º F) occurs. The fans may be field-replaced if either fan fails.
2.12 User Interface
The HU user interface consists of the various connectors, switches, terminals, and LEDs that are
provided on the HU front and rear panels. The user interface points are indicated in Figure 2-2
and described in Table 2-1.
Figure 2-2. Host Unit User Interface
(1) DC POWER
ON/OFF SWITCH
(16)
PORT 1
(17)
PORT 2
(REFERENCE
ITEMS 2 - 7)
LED INDICATORS
(8) SERVICE
INTERFACE
CONNECTOR
(9) NET IN
CONNECTOR
(10) NET OUT
CONNECTOR
(15) ALARM
OUTPUT CONNECTOR
(11) REVERSE
RF OUT
(12) FORWARD
RF IN
18825-A
(13) DC POWER
TERMINAL STRIP
REAR VIEW
FRONT VIEW
(14) COVER PLATE
(18) GROUNDING
STUD