User's Manual

USER MANUAL FOR RD-8132
RD-8132 QI
Copyright - refer to title page
Page 12
ENU Status : 1-0-0
2.2.5 OMT CONNECTION
With the chassis open, only use the local commissioning cable (R-9122C/R-9122AC) directly connects the
serial port of PC to the RS-232 port on the distribution board within the equipment.
Figure 6: OMT Connection with Chassis Open
2.2.6 EXTERNAL ALARM CONNECTION
Four external alarms INPUT are realized on the EXT_ALM port, this is a 7-pin CPC connector. Pin
numberings are shown looking-into the connector on the enclosure.
7
6
3
5
4
12
Figure 7: Pins Allocation for EXT_ALM Connector
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
These signals are defined as “TTL/CMOS level”, the following voltage are valid as EXT_ALM signals:
Voltage as applied to EXT Alarm Pin Alarm Condition recognizaed by system
Low Voltage: 0V to 1.5V Alarm recognized
High Voltage: 3.5V to 5V No Alarm recognized
2.2.7 DRIP-LOOP
Comba recommends that every horizontal cable entry to the equipment forms a 'U' before its entry to the
equipment. Any accumulated water on the cable will drip down at the bottom of the loop and will not climb
up to the equipment.
2.2.8 REMOTE CONNETION OF OMT USING WIRELESS MODEM
For the equipment equipped with wireless modem, the modem provides the option of remote connection of
the equipment to the OMT. The wireless modem implements the link for data and SMS.
RS-232
Distribution Board