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User Manual
Airbridge cBTS3612 CDMA Base Station
2.6.3 Interface for Actuators
The environment monitoring function of BTS also includes the following interfaces
for actuators.
1) Six (A~F) constantly open/closed optional relays for controlling the protection
devices. The usage of the relays (1A/220V) can be defined by users. By default,
A starts the freezer. The relay is activated when the temperature exceeds the
l
upper limit of the specified range.
B starts the heater. The relay is activated when the temperature exceeds the
l
lower limit of the specified range.
C starts the dehumidifier. The relay is activated when the humidity exceeds the
l
upper limit of the specified range.
D starts the humidifier.
l
lower limit of the specified range.
F starts the burglar alarm device. The relay is activated when a burglar alarm
l
occurs.
2) Two PWM outputs, driven by the collector open-circuit gate. The driving current is
300mA and the period (1 second by default) can be defined by users. The resolution
is 8 bits (0~255).
3) Seven collector open-circuit gate outputs (driving current 300mA) for controlling
the specified actuator.
2.6.4 Communication
There is two-way link between the alarm box and BCKM. The a larm box reports
alarm status and monitored data to BCKM through the link. BCKM can send
commands to control the alarm box to activate the protection devices and configure
alarm parameters.
2.7 Lightning Protection System
2.7.1 Overview
Lightning may do great harm to telecommunication equipment. The damage is
related to the external environment (weather, lightning protection and grounding)
where the equipment is located and the protection condition of the equipment.
The lightning protection of telecommunication equipment should observe the
following principles:
The relay is activated when the humidity exceeds the
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System Description
2 Hardware Architecture
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