2 Structure
M200 Integrated Access Device
Product Description
2-10
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
Issue 01 (2008-04-11)
2.4.2 Sensors
This topic provides the appearances of the built-in sensors in the M200 cabinet and provides
the information about the functions of the sensors.
Door Status Sensor
The door status sensor monitors the status of the cabinet door.
The door status sensor of the M200 cabinet uses the door status switch as the probe. The door
status switch consists of two built-in parts. The spring clips of the door status switch attract
each other due to electromagnetic interaction. The door status switch monitors the status of
the cabinet door and outputs the dry contact output signals that have no polarity.
Figure 2-8
shows the appearance of the door status sensor.
Figure 2-8
Appearance of the door status sensor
Temperature and Humidity Sensor
The temperature and humidity sensor monitors the ambient temperature and the ambient
humidity of the cabinet in real time.
The temperature and humidity sensor used by the M200 cabinet outputs the standard current
(4 mA to 20 mA) analog signals.
Figure 2-9
shows the appearance of the temperature and humidity sensor.
