M900/M1800 BTS3X Series Base Transceiver Station
Hardware Description Manual
3 Board
Issue 01 (2006-11-18)
Huawei Technologies Proprietary
3-41
ID
Color
Meaning
Indication
FAIL Red Warning
indicator
ON: PBU generates major alarms.
OFF: PBU operates normally.
lists detailed information about ports on PBU panel.
Table 3-21
PBU ports
ID
Connector Type
Function
OUT
N (Female)
RF signal transmitting port
IN
N (Female)
RF signal receiving port
RST
Reset button
PBU reset button
3.12 PMU
3.12.1 Functions
The PMU is close to the power supply module group.
The PMU mainly performs power supply management and alarm collection:
!
If the AC/DC unit is configured for the PSU, the PMU supports the power supply
management function.
!
If the DC/DC unit is configured, it is necessary to set the capacity of PMU battery to 0,
that is, the battery management function is not used.
The PMU monitors the following signals in real time:
!
Control variable signals
−
Even float charging management and current limiting control of battery
−
Control the switching of the protection load for batteries
!
Boolean value signal
−
AC mains signals and over/under voltage signals (12 V DC/10 mA)
−
N
%
AC/DC module(s) provides N
%
fault status variables (12 V DC/10 mA) for PMU.
(N is the number of PSU configured. If four PSUs are configured for the BTS30, then
four fault status variables will be provided for PMU.)
−
Fan monitoring status variable (normally 12 V DC/10 mA)
−
Cabinet internal smoke detection (alarm: 24 V/10 mA), waterproof (alarm: 12 V/10
mA), access control (normal; 12 V/10 mA)
−
Switching status variable of the battery fuse (–0.3 V DC < normal voltage difference
< 0.3 V DC)
!
Current and voltage analog variable signal
−
Battery group current (A)