User Manual

ADCP-75-192 • Issue 1 • December 2005 • Section 2: Description
Page 2-31
 2005, ADC Telecommunications, Inc.
Table 2-20. RUC User Interface, continued
REF
No.
USER INTERFACE
DESIGNATION
DEVICE FUNCTIONAL DESCRIPTION
7 PA CNTL 2/4 I2C flatpack
Connector
I2C Communications to RFA
8 PA CNTL 1/3 I2C flatpack
Connector
I2C Communications to RFA
7.3 AC Power Entry Controller
The AC Power Entry Controller (APEC) is used for installations requiring AC power only. It
has a 100-240 VAC input and has an EMI filter to condition the signal. The APEC provides
the following functions:
• AC Power for the cPCI power supplies
• Fan tachometer monitoring and control
• FAN fault indicator LED’s
• Future growth for I2C and GPS connections to backplane (not currently used).
The APEC contains two fan controllers that control and monitor the six enclosure fans that are
used to cool the RAN enclosure. The APEC front panel has an IEC-320 for AC power entry
and 16-pin Molex connector near the top connects to both the enclosure Fans and the RF
Assembly (RFA). The RFA provides +28VDC power to the APEC, which uses this power to
provide PWM signals to the six enclosure fans. The APEC front panel is shown in Figure 2-30
and the user interface is described in Table 2-21.
(2) FAN POWER
CONNECTOR
(3) FAN FAULT LEDS
(4 STATUS LEDS)
(4) I2C INTERFACE
(FUTURE)
(1) AC P OWER
CONNECTOR
Figure 2-30. AC Power Entry Controller (APEC)