Nokia Solutions and Networks T5DK1 사용자 설명서

68P64115A19

–

4

Mar 2003

1X SC 4812T-MC BTS Hardware Installation - Software Release R2.16.1.x

2-13

There are two ALARM connectors, A and B. A connector is always
functional; B is only functional when an AMR module is equipped in the
AMR 2 slot in the Combined CDMA Channel Processing Shelf
(C-CCP).

ALARM connectors provide for Customer Defined Alarm Inputs and
Outputs. The customer can connect BTS site alarm input sensors and
output devices to the BTS, thus providing alarm reporting of active
sensors as well controlling output devices.

ALARM A connector provides 18 inputs and 8 outputs. ALARM B
connector provides 17 inputs and 8 outputs. If both AMR cards are
present, 35 inputs and 16 outputs are available.

The PAC combines alarms from five (5) power supply modules in the
BTS, generating one alarm output. The alarm signal is output through
the Alarm B connector, as follows:

S

Major alarm – pin 29

S

Major alarm return – pin 30

Alarm B pin connections above are for –48V frame application
only. These pins ar not used in the +27V application.

These pins are NOT to be used as a customer defined input or
the PSM alarms will not function correctly.

Both ALARM A and B connectors are cabled to the C-CCP shelf
backplane CUSTOMER I/O connector via a single 120-wire (twisted
pair) shielded cable. The inputs/outputs of ALARM A connector are
supported by the control interface module AMR 1. The input/outputs of
ALARM B connector are supported by the optional control interface
module AMR 2. The AMR detects signals from input sensors and
provides relay controlled switched contacts to output devices.

Table 2-7 describes the characteristics and requirements for the inputs
(each of which consists of a wire/pin pair) and outputs (each of which
consists of 3-wires/pins–COM, NC, and NO).