Figure 2-1 Customized alarms collected by the UPEU or UEIU
Customized alarm signals are transmitted to the IN0 to IN3 ports on the USLP2 in the SLPU
and then transferred to the EXT_ALM port on the UPEU or EUIU through the alarm cable for
the BBU. Table 2-2 describes the relationship between the IN0 to IN3 ports and the number of
customized alarms.
Table 2-2 Relationship between the IN0 to IN3 ports on the USLP2 and the number of
customized alarms
Pins of
the
IN0 to
IN3
ports
USLP2 in the upper slot USLP2 in the lower slot
IN0 IN1 IN2 IN3 IN0 IN1 IN2 IN3
1 4+ 5+ 0+ 1+ 12+ 13+ 8+ 9+
2 4-
(GND)
5-
(GND)
0-
(GND)
1-
(GND)
12-
(GND)
13-
(GND)
8-
(GND)
9-
(GND)
3 6-
(GND)
7+ 2-
(GND)
3+ 14-
(GND)
15+ 10-
(GND)
11+
4 6+ 7-
(GND)
2+ 3-
(GND)
14+ 15-
(GND)
10+ 11-
(GND)
For details about ports on the USLP2, see 5.8.5 USLP2. For details about the wire sequence of
the BBU alarm cable, see 4.16 BBU Alarm Cable.
NOTE
The SLPU is configured with two USLP2s by default before delivery when it is used as an alarm signal
protection unit. If a BBU is configured with one UPEU, the UPEU must be installed only in the lower slot.
In this case, the USLP2 in the upper slot of the SLPU is not used.
Customized Alarms Collected by the EMUA
The EMUA can be configured for the DBS3900 that requires more than 16 Boolean alarm
signals. Each EMUA supports 32 Boolean alarm inputs and two RS485 signal inputs.
BBU3900
Hardware Description 2 DBS3900 Monitoring System
Issue 11 (2010-11-10) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
2-3
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