USER MANUAL FOR RA-7100
RA-7100 II2 QI
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Page 33
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3.5.5 EXTERNAL ALARM CONNECTION
For RU, this is a 7-pin CPC connector. The following figure and table show the pin allocation and
definition. Pin numbering are shown looking-into the connector on the enclosure.
7
6
3
5
4
1
2
Figure 24: Pins Allocation for “EXT_ALM” Port
Pin
number
1 2 3 4 5 6 7
Alarm
definition
EXT.
Alarm 1
EXT.
Alarm 2
EXT.
Alarm 3
GND
EXT.
Alarm 4
Reserved Reserved
Table 11: Pin Definition of “EXT_ALM” Port
3.5.6 BTS ALARM CONNECTION
The equipment alarms can be signaled to the BTS via voltage-free relay contacts. The voltage-free
relay connections are connected to the DB-9 port “BTS_ALAM” located on the MCU of MU. The
following figure and table shows the pin allocation and definition.
1
2
4
3
5
6
7
9
8
BTS_OPEN
BTS_CLOSE
BTS_ COM
Figure 25: Pins Allocation for “BTS_ALM” Port
Pin Number
Definition
Description
1 BTS_OPEN
Connects to the normally opened terminal of the voltage free
relay.
2
BTS_COM
Connects to the common terminal of the voltage free relay.
3 BTS_CLOSE
Connects to the normally closed terminal of the voltage free
relay.
4 ~ 9
NC
Reserved.
Depending on OMT/OMC configuration, alarm to BTS can be signaled equipment by either: a) pin1
and pin2 ‘opened’ or b) Pin2 and Pin3 ‘closed’.
